VVL/DET makes 491whp!

[Mazworx_Sales]

Back a few months ago, we did a VVL head swap on a RWD DET block. Here are the run down of the specs. Notice on the graph how it keep wanting to make more power on the band.

Stock SR20VE head
Stock SR20DET block
GT3076R - 18-19psi
RC 1000cc injectors
ROM Tune
Mazworx VE Intake Manifold
Z32 MAF

http://mazworx.com/pics/vvl_38.jpg



http://mazworx.com/pics/whitey%20vvl.jpg

[Team DET]

sick... what does it redline at with that head

[S14_Kouki]

They go to like 8500^^^ This is nice vvl stock cams are like 280's when the vvt kicks whatever that vv something is. Is it stock bottom end??

[Fam0uZ]

it looks like 8.5

[Mazworx_Sales]

Yes completely stock bottom end

[S14_Kouki]

Did you also use a stock TB???

[jr_ss]

:2c:Did you also use a stock TB???

From the pictures, it looks like it's a larger than 70mm TB.

[Sileighty_85]

Did you also use a stock TB???
Looks like a Q45 TB

[SuperiorS14]

wow great numbers..... whats the cost on this type of setup?

[S14_Kouki]

Thats why I was asking cause it does look bigger

[mct3351]

Is the green before the vvl swap and the red after?

Were they both done at similiar boost settings?

If green was the before, what cams were used?

thx

[ILoveJDM]

Is the green before the vvl swap and the red after?

Were they both done at similiar boost settings?

If green was the before, what cams were used?

thx

from his other thread here
http://zilvia.net/f/s-chassis/249687-mazworx-sr20ve-sr20det-project.html

the green line would be the before run

it doesnt mention aftermarket cams either

[mattro]

what the hell? i wish i had a det block and not a de.

that is stupid power.

[eh?]

Nice!
But you guys still suck for ignoring the RB series
:hide:

[THeokaYsLider]

did not know you can swap the heads like that. know the only question for me why do the injectors have to be so big also does the same ecu and wiring stay the same for the swap to be good
thanks

[S14_Kouki]

from his other thread here
http://zilvia.net/f/s-chassis/249687-mazworx-sr20ve-sr20det-project.html

the green line would be the before run

it doesnt mention aftermarket cams either

It prob has stock cams seeing how the vvl heads come stock with a 280 cam's I dont think you need any bigger then that.

Heres the link http://www.tomei-p.co.jp/_2003web-catalogue/e090_camshaft-specs.html

[PoorMans180SX]

Will you please expound on what it takes to swap a VE head on a RWD block?

I know the VVL solenoids need to be relocated and the distributor cap plugged, but what else?

[sh1tsweak]

need a ve oil pump and perform some trickery on the crank pully to make some clearance on the back of it!

[s13silvia123]

Will you please expound on what it takes to swap a VE head on a RWD block?

I know the VVL solenoids need to be relocated and the distributor cap plugged, but what else?

i'm with him i need to know more

[PoorMans180SX]

So, here's what I've got so far:

1. Custom intake manifold
2. Custom exhaust manifold
3. 20V CAS to go where dizzy went
4. Relocate solenoids
5. Head gasket
6. VE oil pump
7. Machine 5mm off the crank pulley

Anything else?

[Mazworx_Sales]

We have a full kit available for the swap over minus the head but if you need help finding a head let us know.

This was also done on a stock ecu with Nistune.

[S13 curtis]

We have a full kit available for the swap over minus the head but if you need help finding a head let us know.

This was also done on a stock ecu with Nistune.

how much do you charge for a head swap? if you want pm me the price i am local.

[shagspeed]

Nice Numbers!!!!

I too have built a 1N5/52F
--------------------
Nicely Ported Head
Full Forged bottom end 9.0:1CR
stock cams
GT35R .78A/R on a Twin Scroll T3 flange with the
Full Race manifold made for the VE
Turbonetics WG45mm flap gate
Haltech Platinum ECU "need to still get"
--------------------
Now have you guys messed with any other cams???? I was thinking the 48deg of overlap is too much and as the low cam is at 0deg to try to remove overlap will create a pumping loss on low cam.. So that's out of the question!

Though again I have seen a dyno chart of a guy running the 2.0 with the SR16 cams @ 70deg overlap on a ported head making 501WHP @ 14PSI ..

So I guess conventional wisdom on turbo and massive overlap might be wrong!!

Was hoping you guys could share any experiences you might have had with cam profiles..

Here is an older pic of kinda what I am running... Did change from GTK to GT35R
http://www.crcsite.com/20vcover2.jpg

[bardabe]

SHAGSPEED! ^^^ lol Shhhhhhhh that's supposed to stay a cock tease till we got it tot he Dyno.

[shagspeed]

So, here's what I've got so far:

1. Custom intake manifold
2. Custom exhaust manifold
3. 20V CAS to go where dizzy went
4. Relocate solenoids
5. Head gasket
6. VE oil pump
7. Machine 5mm off the crank pulley

Anything else?

#4 you can use 20V Solenoid as well.. Though Mazworx plate is a lot more cost effective . Plus they do awesome work and are a great resource of custom parts "present and future" so please support them when and where you can..

#6 make sure you get VE N1 Pump ;)
#7 I found another way. Not needed really..

[shagspeed]

SHAGSPEED! ^^^ lol Shhhhhhhh that's supposed to stay a cock tease till we got it tot he Dyno.

Hahahaha tooo funny.. If my wife will ever let me spend some cash to finish it. You see the Spredsheet of parts to order??? Add the relays you want to it.. I am down to about 3200 bucks left to finish up the car... Not bad..

Dude if I made 500WHP on a 54C SR20DET back in 1999-2000 with old school technology .. This VET will T-BAG your RB engines...hahaha .. You know I have to give you shit about the RB engine. Can't make a turn without snow plowing everything in its way :( At least consider a VK or VH motor at least its got 2 more cylinders and its lighter... I want to make a Flat-Plan Crank and Cams form the VK or VH then we can run S13 computers on the V8's and turn them to 8K.. Why??? Cuz it sounds cool... Anyone know what the rod lengths are on the VH45????

[bardabe]

Hahahaha tooo funny.. If my wife will ever let me spend some cash to finish it. You see the Spredsheet of parts to order??? Add the relays you want to it.. I am down to about 3200 bucks left to finish up the car... Not bad..

Dude if I made 500WHP on a 54C SR20DET back in 1999-2000 with old school technology .. This VET will T-BAG your RB engines...hahaha .. You know I have to give you shit about the RB engine. Can't make a turn without snow plowing everything in its way :( At least consider a VK or VH motor at least its got 2 more cylinders and its lighter... I want to make a Flat-Plan Crank and Cams form the VK or VH then we can run S13 computers on the V8's and turn them to 8K.. Why??? Cuz it sounds cool... Anyone know what the rod lengths are on the VH45????
lol asshole, why you gotta make fun of my fat cars, my Z was a fuckin Pig and it handled corners like a champ. RB;s are lovely you just gotta put some weight in the back of the car to even it out. ;)

i swear if you talk me into VVL SR20 and it blows up im going to be FUCKIN pissed,

[s13silvia123]

I'm i able to use my s13 SR engine harness. also am i able to use my PFC for this as well.

[bardabe]

you should, you will need something to control the VVL Solenoid, a greddy Multy switcher works great. or anything else that you can think that will activate the solenoid and deactivate it.

-Juan

[nsany(atl)]

what if I already have a power fc, can the swap still work?

[Teambadrun]

wow usa dynos read so high... 400rwkw (500rwhp) out of a 3076R .... hahahahahaha can't even do that on 25PSI boost and race gas !! You need NOS!

[Teambadrun]

p.s that car is a lag monster, look at how pissy the power chart is.. 5000rpm and only 350rwhp with that turbo... junk!!!

[nsany(atl)]

wow usa dynos read so high... 400rwkw (500rwhp) out of a 3076R .... hahahahahaha can't even do that on 25PSI boost and race gas !! You need NOS!

true, Mustang Dyno's are the only "REAL" numbers

[Teambadrun]

Well i tell you what

Yashio Factory S15 runs 1.7kg/cm2 boost(similar to bar) about 25psi boost, runs NOS and a HKS GT3037S on a full HKS step 3 engine(2.2L,*head job too*)
that is claimed power output 600ps( and japanese dynos seem abit happy too)
but let's just say they are sweet... how can this make that much..
even if it was, its just a peak power number, look at how SHIT the power is deliverd..

[S13 curtis]

Well i tell you what

Yashio Factory S15 runs 1.7kg/cm2 boost(similar to bar) about 25psi boost, runs NOS and a HKS GT3037S on a full HKS step 3 engine(2.2L,*head job too*)
that is claimed power output 600ps( and japanese dynos seem abit happy too)
but let's just say they are sweet... how can this make that much..
even if it was, its just a peak power number, look at how SHIT the power is deliverd..

well i would say its better and makes up for that because it revs a shit load higher then a stock sr head. how would u like it if u had a car that revs to 3 grand but the turbo reaches full boost at 1500. pretty shitty right. think about it.

[shagspeed]

wow usa dynos read so high... 400rwkw (500rwhp) out of a 3076R .... hahahahahaha can't even do that on 25PSI boost and race gas !! You need NOS!

Ya Australia is notorious for making weak cars with no power... Whats up with that??? Maybe your air sucks????? hahaha Sorry could not help it... I do agree with what you guys say to a point. A dyno can go up or down 100HP depending on a dyno you use.. Uhhhhh kinda bullshit.. So now what??? We all use engine dynos? Use a stock car we know drive train loss on and calibrate the dyno accordingly before hand???

I do prefer the DynoPack as its more suited for tuning.. Step and hold in a dyno is most useful for tuning every RPM with every Throttle setting. Also no wheel noise so you can hear the engine better .. Good for tuning as well .. DynoPacks are horrible for dyno days on the other hand.

[shagspeed]

well i would say its better and makes up for that because it revs a shit load higher then a stock sr head. how would u like it if u had a car that revs to 3 grand but the turbo reaches full boost at 1500. pretty shitty right. think about it.

Yes operating range is key.. Though it comes alive at 4500 RPM the VVL Head can turn good power to close to 9500 RPM with ported head and SR16 cams "from what I have seen on a dyno graph of that setup" So a 5000 RPM Opreating range is not bad at all... For Example lets see any KA-T do that or come close for that matter.

[Teambadrun]

well i would say its better and makes up for that because it revs a shit load higher then a stock sr head. how would u like it if u had a car that revs to 3 grand but the turbo reaches full boost at 1500. pretty shitty right. think about it.
well

a friends 2L with a T67-25G 8cm turbo kit, 2L bottom end, step 2 HKS 264,272 hydro cams makes 4500rpm 350rwhp thats 5000rpm more response, he makes peak power of 430rwhp @ 20psi boost.. so please dont say that our dynos read high or our cars make low power, its simply the case of bad high reading dynos in USA

and rev's to 8200rpm(rev limiter) makes power to 8200rpm aswell.. which means why bother with a VVL? it clearly shows it's about setup. Ofcourse the VVL head is probably better, but what a total waste, you can spend your money on many other mods to gain more power, unless you want dyno numbers.....

[johngriff]

wow usa dynos read so high... 400rwkw (500rwhp) out of a 3076R .... hahahahahaha can't even do that on 25PSI boost and race gas !! You need NOS!

Everyone uses DynoDynamics and eddy brakes down under, thats why you guys have lower numbers.

YouTube - VXPSI Supercharged LS1 HSV pushing on dyno (http://www.youtube.com/watch?v=wvCcoz9ZkaU&feature=PlayList&p=D083FCA9B6217DF2&playnext=1&playnext_from=PL&index=52)

I really like the VVT head swap. So cool, Maxworx turns out such cool stuff... makes me want to close up shop, move to florida and just work there... lol

[johngriff]

Ya Australia is notorious for making weak cars with no power... Whats up with that??? Maybe your air sucks????? hahaha Sorry could not help it... I do agree with what you guys say to a point. A dyno can go up or down 100HP depending on a dyno you use.. Uhhhhh kinda bullshit.. So now what??? We all use engine dynos? Use a stock car we know drive train loss on and calibrate the dyno accordingly before hand???

I do prefer the DynoPack as its more suited for tuning.. Step and hold in a dyno is most useful for tuning every RPM with every Throttle setting. Also no wheel noise so you can hear the engine better .. Good for tuning as well .. DynoPacks are horrible for dyno days on the other hand.

You can do constant load on any eddy brake dyno. Larger units take into account your wheel and tire combo instead of bolting a dyno on like a wheel spacer.

They also don't require water cooling... its better than a inertia dyno, but not by much.

[juiced305diesel]

well

a friends 2L with a T67-25G 8cm turbo kit, 2L bottom end, step 2 HKS 264,272 hydro cams makes 4500rpm 350rwhp thats 5000rpm more response, he makes peak power of 430rwhp @ 20psi boost.. so please dont say that our dynos read high or our cars make low power, its simply the case of bad high reading dynos in USA

and rev's to 8200rpm(rev limiter) makes power to 8200rpm aswell.. which means why bother with a VVL? it clearly shows it's about setup. Ofcourse the VVL head is probably better, but what a total waste, you can spend your money on many other mods to gain more power, unless you want dyno numbers.....

Question have you ever taken a VVL head apart? Its design is a amazing compared to a stock SR head. It out flows the shit out of a any SR head. You can also have perfect idle with a VVL head. If your going to build a motor that is going to make big boy power GET A VVL HEAD. If your on a budget or dont plan on making big boy power dont.

[s13silvia123]

this will be my sleeper build within a few months once i get a hold of everything that i need. for those who have done this please help me on what exactly needs to done to achieve my goals

[Geno750]

Ugh, I'm kicking myself for spending so much money on my DET head when I could of easily just gone VE head and called it a day.

[JTunedMotorsports]

im doing a vvl build i have all my parts and will start a journal soon...im doing the cage and paint now...
i plan on using a 3076 with the smaller ext housing..n1 cams and mild port.

[shagspeed]

im doing a vvl build i have all my parts and will start a journal soon...im doing the cage and paint now...
i plan on using a 3076 with the smaller ext housing..n1 cams and mild port.

Remember more Overlap you run aka N1 cams @ 74 deg overlap stock you will need massive flow IMO so a 3076 might be too small for such an overlap.. Nick acually did a VVL head with a GT28RS on stock cams and Turning on VVL yielded a 0 HP gain actually lost a few HP if I am not mistaken.. See if your presure ratio is too high say you are running 10PSI boost but in your manifold its got 25-30PSI of back pressure under overlap law of physics take place..pressure equalization and you start to get this reverse flow and your EGTs start to sky rocket you make no power and you can burn up valves if your not careful.. Food for thought.. ;)

[JTunedMotorsports]

Remember more Overlap you run aka N1 cams @ 74 deg overlap stock you will need massive flow IMO so a 3076 might be too small for such an overlap.. Nick acually did a VVL head with a GT28RS on stock cams and Turning on VVL yielded a 0 HP gain actually lost a few HP if I am not mistaken.. See if your presure ratio is too high say you are running 10PSI boost but in your manifold its got 25-30PSI of back pressure under overlap law of physics take place..pressure equalization and you start to get this reverse flow and your EGTs start to sky rocket you make no power and you can burn up valves if your not careful.. Food for thought.. ;)


yea im still figuring out some parts..I am going to have adjustable cam gears.there are not many options in cams...I shooting for aroind 490 whp depending on dyno etc...I am doing this bc I had a vvl motor at the shop, I had a customer that need to buy my det head for a good price, need rockers to hold together, and want to run a few psi less when achiaving power and pick up more midrange TQ.feel free to add 2 cents...

[shagspeed]

yea im still figuring out some parts..I am going to have adjustable cam gears.there are not many options in cams...I shooting for aroind 490 whp depending on dyno etc...I am doing this bc I had a vvl motor at the shop, I had a customer that need to buy my det head for a good price, need rockers to hold together, and want to run a few psi less when achiaving power and pick up more midrange TQ.feel free to add 2 cents...

Well you cant do much with cam gears unless your adding overlap... The low cam has 0deg overlap and you take out overlap on big cam and you got pumping loss like a mofo...

Smaller the turbo you go you need to dump .. Maybe run a really large gate...

[memphis180sx]

that thing could easily make 500+ hp

[JTunedMotorsports]

i was going to run a tial 44.....

I was going to build the bottom end and keep it 2 liter
3 angle on head, springs, valves, retainers,guides
mazworx vvl kit
z32 trans kit


I am prob drifting this car so i need fast spool and tq..


here are the turbo options.

.63 A/R
.82 A/R
1.06 A/R .
78 A/R (only available on divided T3 housing selection) .


if i was to run the .78 id need to get a twinscroll mani..

[Geno750]

If you want a little bit more cam I'd go with the SR16VE cams instead of the N1 cams.

[shagspeed]

i was going to run a tial 44.....

I was going to build the bottom end and keep it 2 liter
3 angle on head, springs, valves, retainers,guides
mazworx vvl kit
z32 trans kit


I am prob drifting this car so i need fast spool and tq..


here are the turbo options.

.63 A/R
.82 A/R
1.06 A/R .
78 A/R (only available on divided T3 housing selection) .


if i was to run the .78 id need to get a twin scroll mani..

I got the .78 as I have the Twin Scroll manifold and T3 Flange.. I was very close to cutting off the T3 Flange for the T4 1.06A/R Twin Scroll but somthing about cutting up a $1500 mainifold didn't sound good .. The T4 1.06 will spool about 500 RPM Quicker then a .82A/R T3 as funny as that may sound this is what tests have shown... So if you have a choice I would go 1.06A/R on a T4

Take a look at this..

divided gt35r t3 or t4 housing? - Honda-Tech (http://www.honda-tech.com/showthread.php?t=2493947)

Take a look at what Evens-Tunning is saying.

[shagspeed]

If you want a little bit more cam I'd go with the SR16VE cams instead of the N1 cams.

Well 1.6 are quit a bit larger.. The N1s are closer to the standard 1.6 then 2.0's

I have the stock cams in my RWD now.. But I also have a set of N1's along with all the other N1 parts in my road race car. 91 NX2000. So as soon as I get this thing running shortly I have done a bunch of testing N/A on the NX I can't wait to do some experimenting with cam's in the Turbo..

[Mazworx_Sales]

That guy obviously has not tried or looked at the VVL head. #1 is solid mounted rockers. #2 the head flows remarkable more than the DET head. #3 Stock cams are 280 duration. #4 If its sooo horrible, why have a ton of australian guys called us to have these built for them down there.

If you want to compare graphs for arguments sake, take a Full-Race twin scroll GT3076R to that graph and you make the choice yourself.

http://www.full-race.com/catalog_images/SR20_ProStreet_RWD/sr20dyno1.jpg

http://www.mazworx.com/pics/whitey vvl.jpg

[shogun!]

very nice work you have done here. I like it a lot. Keep it up D

[shagspeed]

That guy obviously has not tried or looked at the VVL head. #1 is solid mounted rockers. #2 the head flows remarkable more than the DET head. #3 Stock cams are 280 duration. #4 If its sooo horrible, why have a ton of australian guys called us to have these built for them down there.

If you want to compare graphs for arguments sake, take a Full-Race twin scroll GT3076R to that graph and you make the choice yourself.

http://www.full-race.com/catalog_images/SR20_ProStreet_RWD/sr20dyno1.jpg

http://www.mazworx.com/pics/whitey%20vvl.jpg

Not sure who you where quoting or what 2 comparisons this are of. But confused could you clarify what this is ?? From what I can see from the file names is that one is a DET and one is VET but are they same turbo on same car???? Because if its same turbo same boost and just a head swap then WOWWWWWW that's amazing...:eek2:

[Def]

well

a friends 2L with a T67-25G 8cm turbo kit, 2L bottom end, step 2 HKS 264,272 hydro cams makes 4500rpm 350rwhp thats 5000rpm more response, he makes peak power of 430rwhp @ 20psi boost.. so please dont say that our dynos read high or our cars make low power, its simply the case of bad high reading dynos in USA

and rev's to 8200rpm(rev limiter) makes power to 8200rpm aswell.. which means why bother with a VVL? it clearly shows it's about setup. Ofcourse the VVL head is probably better, but what a total waste, you can spend your money on many other mods to gain more power, unless you want dyno numbers.....

Dynodynamics dynos seem to put more load on the engine than a typical 4th gear pull on a Dynojet, as the same car will almost always pick up quite a bit of spool time on the DD vs. the Dynojet.

No real comments about the "high reading USA dynos" except Dynojet's measured power output is very close to theoretical. If a car actually lost as much power to the wheels as a DD dictates then powertrain components would be melting in a couple of minutes of WOT for a powerful car - which is obviously not the case.

[johngriff]

l. If a car actually lost as much power to the wheels as a DD dictates then powertrain components would be melting in a couple of minutes of WOT for a powerful car - which is obviously not the case.

Hahahaha no seriously, the DD is a pipe dream killer, if anything is cheap with your setup, the DD will take it away from you.

[shagspeed]

well

and rev's to 8200rpm(rev limiter) makes power to 8200rpm aswell.. which means why bother with a VVL? it clearly shows it's about setup. Ofcourse the VVL head is probably better, but what a total waste, you can spend your money on many other mods to gain more power, unless you want dyno numbers.....

I don't think its fair to bash the VVL cuz you have no experience with them with that said 8200RPM your not even getting started on a VVL when you think they go flat???

Here is a dyno chart of a SR20VE with SR16 cams @ 14PSI

http://www.crcsite.com/SR20VET_16cams.jpg

Ohhh Whats that @ 8200 RPM where you shut down your DE's ohhhh looks like an extra 50HP woww where that come from??? VVL Powwa
You got served Son... :duh: DOEE

[doug200t]

I dont understand why people are so against learning new things. Everyone on here seems to think buying a product will make them power. Its all about product development and research, This is why im glad we are developing new parts for this conversion shagspeed. BTW dont hate on RB's son letting off throttle will straighten me right up ;)

[shagspeed]

I dont understand why people are so against learning new things. Everyone on here seems to think buying a product will make them power. Its all about product development and research, This is why im glad we are developing new parts for this conversion shagspeed. BTW dont hate on RB's son letting off throttle will straighten me right up ;)

You know what I am into... Road Race & Time Attack also going to run the Silver State Challenge when this car is done.. an RB is just brute force.. To run hard on a road & Time Attack you need finesse & Balance.. RB is just too heavy IMO .. I don't think I have ever seen a RB win a Time Attack in an S-BODY.. Too much motor not enough wait and balance... Stick an RB26-30 or 2JZ into a Porsche 944/968 if you want a good handling and fast car..

Drag Racing and Drifting okay go RB but I have done it all even offroad . Offroad is by far the most fun but I don't have 100-200K to build a Class 1 car. So I stick to stock chassis in this realm I have had the most fun on a road course and you know how much I bashed road racing before I tried it.. What a mistake .. So I think you can put as much HP as you want to an RB S-Body car and my N/A VVL NX2000 will annihilate you @ Streets .. Though I must say what a Joy it would be if you could prove me wrong... I have been wrong many times before though its rare ;)

[Grenade180sx]

i think the vvl head is a great thing it's one more solid part to put into these touchy SR's

[JTunedMotorsports]

I got the .78 as I have the Twin Scroll manifold and T3 Flange.. I was very close to cutting off the T3 Flange for the T4 1.06A/R Twin Scroll but somthing about cutting up a $1500 mainifold didn't sound good .. The T4 1.06 will spool about 500 RPM Quicker then a .82A/R T3 as funny as that may sound this is what tests have shown... So if you have a choice I would go 1.06A/R on a T4

Take a look at this..

divided gt35r t3 or t4 housing? - Honda-Tech (http://www.honda-tech.com/showthread.php?t=2493947)

Take a look at what Evens-Tunning is saying.


i plan on running the mazworx. trans. turbo and vvl kit

not sure on the 63 or 82 ar

there kit is not available in twin scroll..they dont recomend it.

not sure i can run stock cams. n1, or 16s...hope for 500whp..dyno jet or like 480 dyno dynamics...i was thinking of keeping the rev to 9-9.5k so I dont have to shift in turns mid drift,

fyi i will have a fully build 2.0 bottom end
head. 3 angle. valves, springs, retainers, guides,

[Chuvy]

We have a full kit available for the swap over minus the head but if you need help finding a head let us know.

This was also done on a stock ecu with Nistune.

can you pm all info and price on the kit please.

[juggernaut1]

Dynodynamics dynos seem to put more load on the engine than a typical 4th gear pull on a Dynojet, as the same car will almost always pick up quite a bit of spool time on the DD vs. the Dynojet.

No real comments about the "high reading USA dynos" except Dynojet's measured power output is very close to theoretical. If a car actually lost as much power to the wheels as a DD dictates then powertrain components would be melting in a couple of minutes of WOT for a powerful car - which is obviously not the case.

So you have happy engine dynos as well?

Based on the manufacturers power claims, the DD dyno's are spot on in terms of drivetrain loss.

For instance, Nissan quotes 147kw (197 hp) at the engine for an ADM S15 with SR20DET. On the DD they typically make 120rwks (160 rwhp) to 125rwks (167.5 rwhp) - so we're talking between 18% and 24% drivetrain loss here. Nothing unusual about that sort of drivetrain loss and nothing has melted on my s15 yet. I could quote other manufactures claims and DD rwhp to support the drivetrain loss is fairly consistent.

Also the DD don't put more load on the engine. With a DD you can specifiy a ramp rate and this can be changed by the operator through the software from one run to the next from one car to the next....the ramp rate is the rate at which the DD will allow the tyres to turn the rollers and therefore the engine to rev.



Back on topic.......the VVL head conversion and ability to rev to 8500/9000 and beyond is great an all.....however how long is the bottom end going to last....piston speeds are going to go through the roof, crank starts walking around and.......are bearings and oil pumps etc going to become "consumables".

Don't get me wrong, the converson sounds great.......but are we chasing our tails......and creating a 4 cylinder rotary?

[shagspeed]

So you have happy engine dynos as well?

Based on the manufacturers power claims, the DD dyno's are spot on in terms of drivetrain loss.

For instance, Nissan quotes 147kw (197 hp) at the engine for an ADM S15 with SR20DET. On the DD they typically make 120rwks (160 rwhp) to 125rwks (167.5 rwhp) - so we're talking between 18% and 24% drivetrain loss here. Nothing unusual about that sort of drivetrain loss and nothing has melted on my s15 yet. I could quote other manufactures claims and DD rwhp to support the drivetrain loss is fairly consistent.

Also the DD don't put more load on the engine. With a DD you can specifiy a ramp rate and this can be changed by the operator through the software from one run to the next from one car to the next....the ramp rate is the rate at which the DD will allow the tyres to turn the rollers and therefore the engine to rev.



Back on topic.......the VVL head conversion and ability to rev to 8500/9000 and beyond is great an all.....however how long is the bottom end going to last....piston speeds are going to go through the roof, crank starts walking around and.......are bearings and oil pumps etc going to become "consumables".

Don't get me wrong, the converson sounds great.......but are we chasing our tails......and creating a 4 cylinder rotary?

Well an SR20 should sit safely at around 8700 RPM for a long time...Calculates to just under 25MPS .. So the occasional 9000-9500 should be okay .. Its prolonged exposure to exceeding 25MPS creates massive friction and yes can do catastrophic damage.. Running the then SR16VE-N1 Pump that dam little 1.6 can sit at 9K all day long actually more like 10.5K 25MPS on a 1.6 is right at 10.9K so I am not worried about the pump... As far as crank walk... Not so sure about that you might have a point there .. Though the SR16 that turn 9K from the factory are the same bottom end minus the crank girdle & reinforcements and they do just fine.. Though I would run the full 8 counterweight crank with girdle like I am doing and take out as much weight from the Piston and rod side of the rotating mass to try to get it as balanced as possible ... I think there is no worries on the VVL stuff. SR's are dam near bulletproof. as far as bearings go the 17mm wide bearings seem to do fine in the SR16's @ high RPM. You can also run a custom rod with.. I have a set of rods with double tangs 1 to run 17mm wide and another to run 19mm aka the 54C/GTI-R bearings

I have been messing with this dam SR engine for almost 13 years now... I have had a GTI-R engine I got about 130K on one build sitting at 380-400WHP on Pump Gas I drove every day anywhere .. This engines are Stout..

[Mazworx_Sales]

Dont blame alot of people being sketchy on what the VVL is capable of. Not many people know of the motor or even its existance. So its pretty much expected why people dont believe half the stuff that's posted up there about it.

The N1 motor from the factory had 8 injectors over 200+whp a/m. The thing revs out to like no tomorrow. I mean we have the exact same setup(VE/DET) in our S15 drag car and that thing revs to 11K making over 1400whp.

[doug200t]

Mazworx, Shagspeed and I have actively followed your S15 Drag car, it proved our research on the VVL head. Just you guys had the funding for such a great project and beat us to it. Shagspeeds project 180sx is going to be released soon as it also will be a wicked head turner and confuse the current sr20 crowd ;) we where making power on SR20s before any of these kids knew what they where. 500hp ins the 90s+ was unheard of and the cover of sport compact car we got to show the power off. Vipers had no idea why a sentra was pulling them on the freeway 10 car lengths.

[shagspeed]

Dont blame alot of people being sketchy on what the VVL is capable of. Not many people know of the motor or even its existance. So its pretty much expected why people dont believe half the stuff that's posted up there about it.

The N1 motor from the factory had 8 injectors over 200+whp a/m. The thing revs out to like no tomorrow. I mean we have the exact same setup(VE/DET) in our S15 drag car and that thing revs to 11K making over 1400whp.

N1 head is also milled .40 as well from the standard 1.6L... Though the best head when it comes to VVL is the 20V head water passages are improved in such a way it allows for more porting to be done..

Also outside a race car that S15 is a piece of art work.. Very well done car... Yes I wish my pockets where as deep ;) looks like that car has well over 100K in it.. Big Props on that car guys...

[shagspeed]

Mazworx, Shagspeed and I have actively followed your S15 Drag car, it proved our research on the VVL head. Just you guys had the funding for such a great project and beat us to it. Shagspeeds project 180sx is going to be released soon as it also will be a wicked head turner and confuse the current sr20 crowd ;) we where making power on SR20s before any of these kids knew what they where. 500hp ins the 90s+ was unheard of and the cover of sport compact car we got to show the power off. Vipers had no idea why a sentra was pulling them on the freeway 10 car lengths.

Yes toughs where the days.. Also Hyabussas wounder why this dam Sentra is side by side the whole way.. Though Road Racing is where its at for me now.. I will be happy with 450-475WHP on Pump Gas!!! I didn't sleeve my block so I think I am limited to 550 is about all I want to push it.. This will be pleanty to set some lap records if possible..

BTW what is the most anyone has got on a stock block???

[juggernaut1]

Shagspeed......as you pointed out they will live at those rpm however it sounds like you are customising parts/reciprocating mass to do so. Hope it all goes well for you....and keep us updated.

Mazworx as you've pointed out earlier quite a few Aussies are keen on the conversion and yes the conversion seems to be gathering momentum in Australia with a few builds in the process. The conversion has been done in prior years however, the results weren't overly convincing for one reason or another. Hopefully, it will be good to see a few more conversions in Australia finished to establish what is the "norm" rather than one off dyno's etc on our DD dyno's as seeing dynojet dyno numbers leaves things up in the air a little as we are not used to seeing such power numbers.......i.e. what factor do we apply to the the dynojet numbrs to get a DD number.

More importantly it will be good to see what the conversion is capable of in competition as I for one don't solely rely on WOT dyno numbers when assessing a package as I'm more into road racing.

P.S. I would love to see this conversion with a twin scroll T4 GT35 - could this be the ultimate street/circuit/drag package.....of course assuming you could get the power to the ground?

[shagspeed]

Shagspeed......as you pointed out they will live at those rpm however it sounds like you are customising parts/reciprocating mass to do so. Hope it all goes well for you....and keep us updated.

Mazworx as you've pointed out earlier quite a few Aussies are keen on the conversion and yes the conversion seems to be gathering momentum in Australia with a few builds in the process. The conversion has been done in prior years however, the results weren't overly convincing for one reason or another. Hopefully, it will be good to see a few more conversions in Australia finished to establish what is the "norm" rather than one off dyno's etc on our DD dyno's as seeing dynojet dyno numbers leaves things up in the air a little as we are not used to seeing such power numbers.......i.e. what factor do we apply to the the dynojet numbrs to get a DD number.

More importantly it will be good to see what the conversion is capable of in competition as I for one don't solely rely on WOT dyno numbers when assessing a package as I'm more into road racing.

P.S. I would love to see this conversion with a twin scroll T4 GT35 - could this be the ultimate street/circuit/drag package.....of course assuming you could get the power to the ground?

All I did was use the 8 counterweight crank as this is what is available to everyone easy as it was for me... So nothing crazy just simple ..

Also on getting power to the ground.. All you can get to the ground is TQ so this is why I think the VVL will work so well makes TQ and should go flat across while HP climbs to the moon.. Also though not too knowledgeable on TQ vs Traction I would think as speed goes up so does your available traction vector as down force will increase .. Speed based boost! I do believe the Haltech Platinum I am getting has that.. :)

[Teambadrun]

How come all the charts im reading are all dyno queen charts? not one car there makes anywhere near 350rwhp at 4000-4200rpm?????? they all make power after 5,000rpm(abit late! for a GT3071/ or 76R)

[whitey240]

Here is a video from Import vs Domestic: John White's Nissan 240sx Drag Racing on Vimeo (http://www.vimeo.com/7736952) *Note, this was my first time racing the car for about a year and a half. With more seat time and a few changes I know it will be a 10 second car.

The car has been a blast to drive and I can't say enough about the service and quality from Mazworx. I am glad I could help them in creating the kit. Daily driving the car is a dream now. The power is delivered so linear and smooth that is makes a ~500hp car predictable. If you have any questions on my experiences with Mazworx, the kit, or how it drives feel free to reach out to me.

The car is currently for sale on Ebay as I have another project burning in my mind. But if it does not sell next year it will see a few more goodies. Two things are currently holding it back from making peak power. I think we reached the max on the fuel setup and the Z32 MAF. That needs addressed as well as better gearing for drag racing.

[S13 curtis]

How come all the charts im reading are all dyno queen charts? not one car there makes anywhere near 350rwhp at 4000-4200rpm?????? they all make power after 5,000rpm(abit late! for a GT3071/ or 76R)

hold your breath.

[whomiked]

Can't see the before and after dyno numbers. Can someone post em?

[KaranS14]

Hi I'm from the Uk and not really anyone using these heads here...

I have a s14 I use mainly on track specifically trips to the nurburgring, currently running unopened engine with a 2871r 0.64 at about 20psi 340bhp on rolling rd. It's been super reliable for a long time however recently with all the chassis improvements I've been craving more power. I bought a sr16ve head a while back and have been thinking of fitting this along with a slightly larger turbo, maybe gt3071r-wg, keeping the low mount setup I have.

Couple of questions... Will stock pistons be ok with the high lift sr16 cams or will I need cutouts? Will the turbo run out of puff...I may want t rev to 8000 and would be happy with 400hp.

Plan on using the mazworx kit, and sticking to my power fc with 740s

Many thanks
Karan