6 cylinder l31 with KA head

[yarou]

This blew me the fuck away, and I figure some of you out there haven't seen this craziness.

official thread - http://forums.hybridz.org/showthread.php?t=120659

driving vid - http://www.youtube.com/watch?v=6VRyvJAU9gM

http://www.bandmzcars.com/sitebuilder/images/intercoolerpics1_018-600x450.jpg

http://www.bandmzcars.com/sitebuilder/images/DSCN1135-600x450.jpg

http://www.bandmzcars.com/sitebuilder/images/intercoolerpics1_011-600x450.jpg

http://www.bandmzcars.com/sitebuilder/images/FrankPics_021-600x398.jpg

http://www.bandmzcars.com/sitebuilder/images/needssorting4-25-07_103-600x450.jpg

http://www.bandmzcars.com/sitebuilder/images/needssorting4-25-07_130-600x450.jpg

http://www.bandmzcars.com/sitebuilder/images/needssorting4-25-07_121-600x450.jpg

http://www.bandmzcars.com/sitebuilder/images/needssorting4-25-07_163-600x450.jpg

http://www.bandmzcars.com/sitebuilder/images/DSCN1118-600x450.jpg


http://www.bandmzcars.com/sitebuilder/images/DSCN1125-600x450.jpg

[ZenkiCam]

OMG.. Crazyness... Reps.

[90KAcoupe]

^ I love this engine... other then the TT

[SW20Racer]

there was mention of an engine like this in a magazine recently ( just a small blurb) so whats confusing me is, did this guy get his running (too much to read through right now) or is he not the only one to do this?

its definitely a cool build, but what are the advantages to this over an rb? the only one that i can think of is cost, and thats only if you have like 3-4 spare engines lying around...

[KidSaru]

I have a feeling this would cost the same or more than most RB engines...

Sick none the less.

[Vernal]

how the hell did he make that head work and make that valve cover look so flawless

[projectRDM]

I fucking love it. Advantage over an RB - chain vs. belt. Plus you'd have to buy an RB30 and bore it to get the same cylinder capacity.

[ayuaddict]

Henry showed me this shit like 30 min ago.

im reading the thread.

and RB would have been cheaper.

blah blah.

fuck that shit.

he did it just to do it.

i think its cool.

[KidSaru]

Exactly...This hybrid motor > RB

[McRussellPants]

I fucking love it. Advantage over an RB - chain vs. belt. Plus you'd have to buy an RB30 and bore it to get the same cylinder capacity.

Are you fucking serious?

RB in the hamper brodiddily, This shit has a chain on it?

The head is held together by 2ft long threaded rods.

Could not imagine a worse car to drive with more effort into it.

S30 suspension barf
KA head barf
L28 barf
z31 turbo barf.

[KA-T_240]

I know one of the builders of that. They are from pheonix. The one makes it up to MN/ND a couple times a year. I know I sold him(goes by McAdam, who happens to be a Genious!) a bunch of parts he was going to take back for that project or the other ones they were working on. He said they were using RB26 cams in that motor.


I have not looked at the info, but pretty sure it did over 400whp.

[rb25_s13*CHUKI]

Exactly...This hybrid motor > RB

:down::down::tweak::tweak::loco::loco::loco:... No my friend I don't care what kinda "Hybrid" this is with the money it too to build this thing... U could build any Rb series engine to walk all over this "Ka30" and still last longer...

[LB.Motoring]

Badass because its labor,

but penny for penny

lightly modded rb > monster ka

[KidSaru]

:down::down::tweak::tweak::loco::loco::loco:... No my friend I don't care what kinda "Hybrid" this is with the money it too to build this thing... U could build any Rb series engine to walk all over this "Ka30" and still last longer...

I couldn't care less.

[240love]

wow thats nuts!!!

[BigVinnie]

Yeah man I saw the beginning stages of that head and block being built on the Hybrid z forums a couple years back. The guy that built it is a genius.
The idea of that motor was to build a new school LZ engine...
The O.S giken head, and L block were used back in the 70's.
The KAde head is a much better refined version of the GIKEN dOHC CROSSFLOW HEAD.
Pretty amazing work....

This is how the head build started back in 2005.
http://forums.hybridz.org/showthread.php?t=100001

[KA-T_240]

This was on the Z31 turbos(Thats right, 470+ WHP):
http://www.bandmzcars.com/sitebuilder/images/new_graph-752x565.png

New setup(Twin T04E):
http://www.bandmzcars.com/sitebuilder/images/DSCN1427-600x450.jpg

[McRussellPants]

OS Giken head.

Infinately cooler.

Probably not 3 KA heads sandwiched together
http://rick.thebowersplace.com/pix/AS%20twin-turbo%20TC24%20engine-1.jpg

[BigVinnie]

Badass because its labor,

but penny for penny

lightly modded rb > monster ka

I'm pretty sure power for power though that 31dett drops more torque than even a modified RB30det build.

[McRussellPants]

I'm pretty sure power for power though that 31dett drops more torque than even a modified RB30det build.

Im pretty sure an RB30 would have a longer powerband.

[AFSil80]

Good to see this car is still getting attention around the internet. I bought my 90 240 from McAdam. He's a pretty smart person and not afraid to try anything.

[drift freaq]

Props for building something crazy. I guess if you have lots of time and want to be unique its cool. I would drop a RB in S30 and call it a day.
Some people fail to realize when all is said and done a S30 suspension is a 30+ year old design as well as the chassis. Fact is short of stitch welding and caging the whole car anything over 350-400HP in a S30 will twist the unibody to shit. Used to happen all the time back in the day with the V8 converted cars.
Plus 250HP in a 2350 lb chassis is going to go like stink already. No need for more power in those cars. IMO.

[Gumballf355]

hahahaha.... all that work for what... damn that gets props tho.
Who did all the machine work?? Custom cams?! Man that's just a headache thinking about how much custom work went into this motor.

[KidSaru]

hahahaha.... all that work for what... damn that gets props tho.

That could be said for most any car tuning...

[bbejj123]

im pretty sure this guy did this for shits and giggles and wanted to do something that no one else has done or would even imagine doing

[eastcoastS14]

thats beastly

[Bushido]

Yeh, the idea started out as building his own crossflow head. I remember this projects beginnings... cool to see he went through with it and its running.

OS giken heads are awesome, but this is cooler because he put the shit together himself.
I do think the valve cover and timing cover are wack though, would be much cooler without the typical s30 redneck style.

[ayuaddict]

yea the writing is fucking ugly.

but i guess advertising is important, advertising=customers=moneys?

[Tops*]

This is too awesome.

I didn't understand what Henry meant by L31 with KA heads, but then I skimmed the thread myself and couldn't believe what I was seeing.

"woahhh...WOAHHHHHH......" were my exact words.

[sldbyuramg]

"im pretty sure this, im pretty sure that"....who gives a shit if an RB can make more power or who can make more torque...shit throw a twin turbo LS7 in the bitch and call it a day. the purpose of the build im sure wasnt to save money...im sure it wasnt even to beat an RB...it was to fabricate your own motor...basically...
that shit is sick and original

[Addicted2Kouki]

wow. thats just crazy for the work put into it.

[Mr. Jesse]

That shits Hottt!!!!!

[Antihero983]

as a fellow S30 owner, i LOVE it.

and mcrussellpants, care to elaborate a bit on why/how S30 suspensions suck?

[koukimonster139]

all that machinework and modification just to throw some shit turbos on it and go.....



sweet welds too

[skippy k]

"im pretty sure this, im pretty sure that"....who gives a shit if an RB can make more power or who can make more torque...shit throw a twin turbo LS7 in the bitch and call it a day. the purpose of the build im sure wasnt to save money...im sure it wasnt even to beat an RB...it was to fabricate your own motor...basically...
that shit is sick and original

^ pretty much took the words out of my mouth. wether it makes more or less hp than the rb is irrelevent. its the fact that be custom built the motor and put the work and labor into it. +1 for the sickness

[BigVinnie]

Im pretty sure an RB30 would have a longer powerband.


It's a stroked and bored RB25 it would be shorter...
L31 is a stroked and bored L28.

Theres less change in the rod stroke ratio between the L28 stroked, compared to the RB25 stroked to 3.0liters.
The stroke is increased so much in the RB30 design you can't use variable cam timing either. L28's can use much higher lift and lobier cams. If you ask me the power bands won't be to much different, but I don't see an RB30 making peak power passed 7000RPM.

[qwikspool]

alot of work put into it. being unique.

[TPS240sxS13]

nice to see something different

[gunluvS14]

i saw it in KA-T org couple weeks ago.. that dude has some mad machining skill.

[CursedGTR]

Pretty Sick Build.... To all the haters out there, if you had the time and money plus the skill to do something that no one else would really try and then make it work, would you not do it??? Just for the fun of it.

I can see that this was probably not done for performance value but rather WTF??? Value with some "if I am going to do it, I may as well". Got a similar case with a guy over here, an RD28 (Diesel) and an RB26 Head, seems that he might be able to make it work and he is only doing it to see if he can. Geniuses and people that are smart and very bored tend to do things like this.

[xplicit240]

as a fellow S30 owner, i LOVE it.

and mcrussellpants, care to elaborate a bit on why/how S30 suspensions suck?

just to back up a fellow 240z driver. arizona Z car makes a crazy ass suspension for the Z. full road race set ups, from A arms to mustache bars and coil overs. and yes there are coil overs that can be used to update the suspension. 240z tuning has been around. i didnt know much about it yet until i started digging. but people have been doing some crazy upgrades to these cars.

[OBEEWON]

Holy crap, I swear I was day dreaming about this yesterday. Only with a SR20 tho.

Its good to see such innovation in a stagnant scene.

[McRussellPants]

It's a stroked and bored RB25 it would be shorter...
L31 is a stroked and bored L28.

Theres less change in the rod stroke ratio between the L28 stroked, compared to the RB25 stroked to 3.0liters.
The stroke is increased so much in the RB30 design you can't use variable cam timing either. L28's can use much higher lift and lobier cams. If you ask me the power bands won't be to much different, but I don't see an RB30 making peak power passed 7000RPM.

What are you talking about?

The OS Giken RB30 has a Deck plate to fix the rod ratio.

What does it matter that the L28 can use a higher lift cam? we're talking about an L28 with a KA head on it so now you can't run shit for cams

lol at peak power at 7k, thats totally turbo Dependant, There are RB30s making peak power at 11k.

Its the same retarded argument as KA vs SR, "KA powerband is so great." when people are really just seeing .4 more liters and making assumptions. you can find 90% the same mods list KA to SR and the KA makes power from 3500 to 6k instead of the SR making it from 4k to 8k the same thing is gonna happen when you try and compare an RB to this contraption.

[racepar1]

I just don't see why anybody feels the need to hate on this motor. It is the most original engine build that I have ever seen and the dyno numbers prove that it works. Is it the best engine out there? Absolutely not! But it is FAR more badass and original than just throwing an RB or LS1 in it and calling it a day. The OS giken head that russel posted pics of is super badass as well, but not as original and definitely nowhere near as attainable as they are more rare than a virgin the day after prom. Without people like this doing what hasn't been done before we would all be riding fucking horses still.

[ZilviaKid]

wow that is one sick engine! cant wait to hear some high quality sound bites from it.

[BigVinnie]

we're talking about an L28 with a KA head on it so now you can't run shit for cams



Dude you can run 500 Lift and duration cams on a KA head as far as much as you fly cut the pistons.......
The KA engine is stroked more than that stroked L31...LOL
Don't start this into an argument that you will lose....

[McRussellPants]

Dude you can run 500 Lift and duration cams on a KA head as far as much as you fly cut the pistons.......
The KA engine is stroked more than that stroked L31...LOL
Don't start this into an argument that you will lose....

500 duration? sounds fucking sick whats it all about?

500 lift on a KA-E head maybe, I call BS on DE cams lifting over 10mm. What does it matter anyway? You could fit 13mm in a DE head and it would still choke after 6kRPM

Rofl. can fit .500 with the cam caps milled down. SIKKKKKKKKKKKKKKKK

lol at argument that I'll lose,who cares? I can always fall back on the argument that you guys criteria for deciding what motor can make alot of power is laughable at best.

[BigVinnie]

500 duration? sounds fucking sick whats it all about?

500 lift on a KA-E head maybe, I call BS on DE cams lifting over 10mm. What does it matter anyway? You could fit 13mm in a DE head and it would still choke after 6kRPM

Rofl. can fit .500 with the cam caps milled down. SIKKKKKKKKKKKKKKKK




CORR KA24de truck engines use as high compression passed the 12.1:1 rated CR's and make over 300~350WHP with 480+ lift and duration cams. Buckets are shaved down and modified.


So my KA engine chokes at 6000RPM eeh...LOL People think that the stock cams alone make the KA choke at 5800RPM, that is also a huge myth. It's corrections you make to lighten up the drive train and modify the intake, and exhaust.. The KA engine with it's rod stroke ratio is one of the heavier more efficient heavy breathing 4 banger engines, KA's love bigger cams no matter what with lift, durations have to come more narrow though. I could probably put good 3 degree retard on tghe stock cams I have right now and make a few more Donkey punches. When you start getting into those bigger cams it's all about retard as well and since the KA is a tall deck block engine those cylinders have plenty of room for manipulating the retard of the intake cam. The suction effect is like super charging a KA.
My engine continues to make power at 6500RPM Naturally aspirated with NO TURBO. I doubt I will ever see the light of day passed the PDM cams for my engine ( to be installed soon for bigger numbers), but I've seen plenty of work on KA's using 480+ cams that obliterate and dominate most 4 bangers on the market....
You simply just don't know shit about KA's.
Anyway seriously I would rather get back on topic and talk about this 31dett....
http://i27.photobucket.com/albums/c166/BigVinnie/PeakHPMustangDyno.jpg

[Antihero983]

and keep in mind, SR's have one of THE worst valvetrain/head designs. ever.

i love my L28, and i trust it alot more than i would an RB.

what L-series motor have you heard with crank issues? none.

[McRussellPants]

and keep in mind, SR's have one of THE worst valvetrain/head designs. ever.

Do Tell?


hahahahahahahah

[JVD]

http://i27.photobucket.com/albums/c166/BigVinnie/PeakHPMustangDyno.jpg
EDIT: NVM... looks like Vinnie is showing off his 150hp KA dyno sheet again.

[Antihero983]

Do Tell?


hahahahahahahah

are you kidding?

actually you know what, i'm not turning this into a SR Vs. KA thread.

ill leave it at that, cause i know youll go ooooon and ooooon about how "superior" the sr is.

my main point was, i'd rather have an L28 over a RB anyday.

[ByeByeSti]

lost for wordson this onee

[justaKAiswear]

different.... Ill give it that, def. cool in its own way, but looks like a lot of time and a lot of money that could have been better put into a different set up.

But then again, this is coming from someone who does not have a machine shop on hand and is on a limited budget! :D

[BigVinnie]

at least the KA has a properly designed valvetrain that doesnt get valve float.



All valves eventually float. That is more dependent on valve springs, and the over all weight of the valve train. Which in most cases people move onto titanium retainers and springs.
The sr won't valve float any more than the KA valve train will. It's just more of a matter that the sr uses to many mechanical parts that are involved in it's valve train.

Bucket style valve trains are just known to be more superior to any other valve train because it isn't limited to valve lash, or crucial lifting mechanics that can over time become a large defect or drawback to lifters and rockers, as the sr or KAe valve train systems are designed.

[BigVinnie]

EDIT: NVM... looks like Vinnie is showing off his 150hp KA dyno sheet again.

And you have a small penis??? Your point was??

[Antihero983]

edited above post, thanks for clarifying vinnie! :bigok:


ps. SR rocker arms are known to break rather easily fyi.

[racepar1]

All valves eventually float. That is more dependent on valve springs, and the over all weight of the valve train. Which in most cases people move onto titanium retainers and springs.
The sr won't valve float any more than the KA valve train will. It's just more of a matter that the sr uses to many mechanical parts that are involved in it's valve train.

Bucket style valve trains are just known to be more superior to any other valve train because it isn't limited to valve lash, or crucial lifting mechanics that can over time become a large defect or drawback to lifters and rockers, as the sr or KAe valve train systems are designed.

This is the exact reason why F1 cars use a pneumatic set-up rather than springs in the valvetrain. The spring rate required to keep the valves from floating at 20,000 RPM would be too much pressure to keep the cams and lifters from eating eachother. Be careful when upping valvespring rates to prevent float at higher RPM's. When we first started running formula atlantic everybody was having problems rounding off cam lobes beacuse the spring pressure required to keep the valves from floating at 10,000 RPM was too high and the cams and lifters were eating eachother. The solution turned out to be titanium coating the lifters. That reduced the friction enough to allow the cams to live at those RPM's. Of course now there are better coatings than titanium. Actually coatings is where pro teams are getting extra HP from now because the engines are pretty much pushed to their limits. Reducing friction reduces heat which makes the engine more efficient and last longer. Shit I have heard of pro teams coating the fucking cylinder walls and piston rings even.

[JVD]

And you have a small penis??? Your point was??
Hahaha. Point is, IF I had a small penis, I wouldn't take pics of it and post it on the internet thinking I was a bad ass.

I stopped reading your posts a long time ago when you said 200hp KA for $1K. Everyone of your posts is an epic long essay about how awesome the KA is, yet you still dyno at 163hp. Real sweet. :ghey:

[Oo_Skyline_oO]

whoa props buddy thats a crazy setup what cams are you using?? and whats the specs on it??

[BigVinnie]

I stopped reading your posts a long time ago when you said 200hp KA for $1K. Everyone of your posts is an epic long essay about how awesome the KA is, yet you still dyno at 163hp. Real sweet. :ghey:


Truth is thats 203HP to the crank... Did I lie...No.... Peak power is also at 6500rpm, not 5800 rpm as provided for stock KA's.
It's more of the accomplishment that you can take a crap stock engine use the stock cams provided, add bolt ons, and a crap SAFC tune to make 32HP over stock on a fraction of the cc injection size turboed engines use. Thats the beginning of a small accomplishment to what you could really afford on a KA engine and make bigger HP goals.

You fail.....

Chose not to read anything I write ever again, I don't care I won't get butt hurt because you are the lost cause, or the failure to understand those threads.

[McRussellPants]

ps. SR rocker arms are known to break rather easily fyi.

Thats as retarded as me saying:

KA Rods snap when you run a 67mm on stock injector.

Yeah, of course you'll snap rockers if you run big lift and valve spring on dead 150k mile lifters. duh.

meanwhile if you treat them right you can run the stock ones to 9500 and run ignition cut.

Just so you know you guys have the most ridiculous criteria for a good motor.

[sldbyuramg]

why when somebody starts a post does everyone start fighting over KA and SR shit...
nobody really gives a shit if you put on some bolt ons and added over 10% horsepower to the wheels. if your happy with your car and how it drives...then great...this guy was obviously NOT happy with that and built his own sick motor that makes good power... not very many people have the knowledge or balls to even try to make something like this work

[BigVinnie]

All I'll say is 90% of the clowns in this forum couldn't build something like the KA 3 piece head with a L28motor. Hell I'm included in that 90%.

[McRussellPants]

Yeah.

I couldn't

Fortunately I know how to add so I can't delude myself into thinking its somehow better or cheaper than an RB or 2JZ.

Fuck, 2JZ-GE would be so much better than that crapper.

[JVDSKYRINE]

I'm pretty sure power for power though that 31dett drops more torque than even a modified RB30det build.


I dunno about that I will post my results when my shits all said and done:spank:

but yeah the L31's cool!! Low dyno numbered all motor KA's not so much

[racepar1]

Come on russel you have to admit that it's very cool and original. The point of this motor is not to be the best engine ever or to be the most cost effective one. The point is to do something cool and original and it just happens to work pretty well according to the dyno sheets. You've gotta give the guy props, even if there are more cost effective options.

[drift freaq]

and keep in mind, SR's have one of THE worst valvetrain/head designs. ever.

i love my L28, and i trust it alot more than i would an RB.

what L-series motor have you heard with crank issues? none.

Ah excuse me. The RB happens to be a descendant of the L series and crankwalk issues? Ah no. The L28 is a rev less wonder whereas RB's are very nice. You obviously do not know much about RB's beyond reading heresay. I have experience with both engines and I would never take a L28 over a RB.

[BigVinnie]

Ah no. The L28 is a rev less wonder whereas RB's are very nice. You obviously do not know much about RB's beyond reading heresay. I have experience with both engines and I would never take a L28 over a RB.


You have to admit though the L28 is probably much more rev, and HP happier with a cross flow head.
The old L series head sucks balls, and wasn't very good on the flow bench.

At least a KAde head out flows those old L series head by at least 30% better in flow efficiency.

[Bushido]

guys, you are ignoring the fact that the L series is a design from more than three decades ago... of course the RB is superior.

The RB is a direct descendant of the L and rectified the major weaknesses of the L, mainly the head design.

I love my L28 too, but it is outdated technology by todays standards. but it deserves respect for being as competitive as it was in it's day.

As for the L and crank issues, they've been common throughout it's history. in the 69 racing season the crankshaft design was altered after significant vibration problems were occurring. Another supporting fact is that i've had to change my harmonic balancer on my 280z twice within 10 years.

And McRussell, I usually agree with what you gotta say, but 2jz is totally mundane compared to a custom crossflow head on a 3.1 L stroker. No comparison in which is cooler in my opinion, even though the 2jz is unquestionably a better motor.

[drift freaq]

guys, you are ignoring the fact that the L series is a design from more than three decades ago... of course the RB is superior.

The RB is a direct descendant of the L and rectified the major weaknesses of the L, mainly the head design.

I love my L28 too, but it is outdated technology by todays standards. but it deserves respect for being as competitive as it was in it's day.

As for the L and crank issues, they've been common throughout it's history. in the 69 racing season the crankshaft design was altered after significant vibration problems were occurring. Another supporting fact is that i've had to change my harmonic balancer on my 280z twice within 10 years.

And McRussell, I usually agree with what you gotta say, but 2jz is totally mundane compared to a custom crossflow L head. No comparison in which is cooler in my opinion, even though the 2jz is unquestionably a better motor.


Bushido you are correct about earlier L series cranks. They were prone to twisting under high HP setups. I have a lot of respect for L24's and L26's in fact a L26 is basically a L28 crank and rod in a L24 block. It actually has the broadest flattest torque band of all the early L series six's. The two problems with the L28 had to do with the larger bore size and the head that while it had large valves basically flowed terrible and had terrible camshafts. Nissan addressed all these issues in the RB series hence why the 26 got labeled Godzilla. Don't get me wrong about 2JZ's,i.e. a dope engine, but we are talking Nissan engines here not Toyota.

[RUTH'LESSDET]

KA's make me wanna vommit:barf:

[xplicit240]

guys stick to the topic. just give a thumbs up or down. i personally think his craftsmanship is the topic. the guy that built this motor knows everything you guys are discussing. the Z's have been around before most of us was born anyways. just appreciate what has been done and move on. im sure if you use the search button theres plenty of threads that start with SR is better or KA is better so carry this battle in that thread.

[drift freaq]

guys stick to the topic. just give a thumbs up or down. i personally think his craftsmanship is the topic. the guy that built this motor knows everything you guys are discussing. the Z's have been around before most of us was born anyways. just appreciate what has been done and move on. im sure if you use the search button theres plenty of threads that start with SR is better or KA is better so carry this battle in that thread.

LOL I already made comments on it. Plus the L series engine comments are actually related to it because its a L series. Oh ya and the engine and cars may have existed before you were born, on the other hand, I well.... :D

[BigVinnie]

guys, you are ignoring the fact that the L series is a design from more than three decades ago... of course the RB is superior.

The RB is a direct descendant of the L and rectified the major weaknesses of the L, mainly the head design.




Correction the Lseries is a descendant of the RB motors that were designed from prince motors in the early 1960's. RB's were the race engines of teh earlt 60's, the lseries became an every day production engine.
When Nissan bought prince motors the 240z was the first to start with the L24....
RB has been around for a awhile dude...

[Bushido]

Correction the Lseries is a descendant of the RB motors that were designed from prince motors in the early 1960's. RB's were the race engines of teh earlt 60's, the lseries became an every day production engine.
When Nissan bought prince motors the 240z was the first to start with the L24....
RB has been around for a awhile dude...

I think you're confused dude...

The RB does not predate the L. The RB (and the CA for that matter) are evolutions of the typical Nissan inline-4/6 architecture, seen in the L series. The RB was first implemented in the '86 R31 Skyline. The first L was put in use in 1968 Bluebird.

You could be confusing the RB with the G series engines that were designed (copied) by Prince, as it is debatable that the engine was actually a copy of a Mercedes inline-6. The G series was used in the Prince Gloria and Skyline in the '60s. Note that, before Prince merged with Nissan, Nissan also had their own "G series" of engines and they are unrelated to the Prince G's.

The Nissan S20 engine is closely related to the 1966 Prince Skyline GR8 engine... maybe thats what you were thinking of, still RB comes way later in the game...

[BigVinnie]

I think you're confused dude...

The RB does not predate the L. The RB (and the CA for that matter) are evolutions of the typical Nissan inline-4/6 architecture, seen in the L series. The RB was first implemented in the '86 R31 Skyline. The first L was put in use in 1968 Bluebird.

You could be confusing the RB with the G series engines that were designed (copied) by Prince, as it is debatable that the engine was actually a copy of a Mercedes inline-6. The G series was used in the Prince Gloria and Skyline in the '60s. Note that, before Prince merged with Nissan, Nissan also had their own "G series" of engines and they are unrelated to the Prince G's.

The Nissan S20 engine is closely related to the 1966 Prince Skyline GR8 engine... maybe thats what you were thinking of, still RB comes way later in the game...


RB design dates back as far as the G7 engine with prince motor co....
Look at bore and stroke of both engines RB20de and the G7.
Only difference is that the G7 was a sohc, and it was used in competition against many european auto manufacturers for its time.

[mr.lonelys12]

what a bunch of haters!

i dont care what you guys want to say about the RB series engines. if you had a parking lot full of RB swapped cars with a bunch of you people standing around going stupid goo goo over a RB. then this Z pulls up and opens the hood, i bet all of you are going to stop looking at the RB's and your going to walk over and go "ooooohhhh shhhiiiit!" and stand around that for the next twenty minutes.
:wackit:

respected.

[Antihero983]

Ah excuse me. The RB happens to be a descendant of the L series and crankwalk issues? Ah no. The L28 is a rev less wonder whereas RB's are very nice. You obviously do not know much about RB's beyond reading heresay. I have experience with both engines and I would never take a L28 over a RB.

um i didnt mean crank walk dude, lol we arent talking DSMs.

im talking about the crank/oil pump contact issues.

the RB is a great engine, don get me wrong, i just dont plan on ever putting one in either my S13 or S30.

[Antihero983]

Thats as retarded as me saying:

KA Rods snap when you run a 67mm on stock injector.

Yeah, of course you'll snap rockers if you run big lift and valve spring on dead 150k mile lifters. duh.

meanwhile if you treat them right you can run the stock ones to 9500 and run ignition cut.

Just so you know you guys have the most ridiculous criteria for a good motor.

oh wait. except for the fact that i have had a couple friends break rocker arms with STOCK CAMS and STOCK INJECTORS.

like i said, i know your gonna defend the SR like its your fricken child, so im not even gonna bother.

and honestly, my criteria for a "good" motor is a running one lol ;)

but your criteria seems to be as long as the engine code is SR20DET.

[Phlip]

I would like to ask everyone to end the pissing match, I don't want to have to close this thread.

[Sway500]

Thank You so much Phil! Why can't people just appreciate the engineering that went into a unique powerplant. Who cares about anything else.

[luisgonz]

I would like to ask everyone to end the pissing match, I don't want to have to close this thread.

LOL, Thats a good one Phlip.haha

[BigVinnie]

Twin Turbos haven't been a good idea since the mid 90s. All in all, bleh.




UUHH the RB26 I believe was the last of a few to use a twin turbo setup up until the new GT-R, the claims are that it has one of the worlds fast
production cars using twin turbos.


Engines with dual turbo set ups lose to much lowend torque, and constatly fight to keep peak HP numbers just to make the required heat needed for 2 turbo's spool. Same concept with sequential turbo charging, too much loss in torque. In theory it would be nice but the more turbines you add the more heat that is required from the resistance of not one, but 2 turbines.

Take for example if you have a 2.0 litre engine and you have a split dual manifold, each turbo will only be feed 1.0liters of hot exhaust gas, this means the turbos would have to be very small (smaller than a T25).
In the case of this 31dett you split the manifold you now have 1.75 liters per turbo. Which means that he should be using T25's at the maximum rating to liter displacement. Still that would be an issue of fighting low end torque.
The twin turbo idea isn't the best idea to date.

Now in the case of the GT-R engine it has more than enough displacement to utilize 2 turbos. In the case of the 31dett the turbos just might be to big for it's displacement size I can't tell from the pics if those are T25's or T28's.

[Antihero983]

Yeah, they probably had some busty shit that had been upside down for 20 years in a junkyard. Meanwhile there are people (myself included) that spin stock setup to 8k all day long on the limiter. we've all Mis shifted on the Rev limiter already and our motors still in one piece.

hmm nope they were actually low mileage S14 SR20DETs that were absolutely immaculate. but hey, keep on making bullshit excuses to defend yourself. oh wait. thats right. YOUR motor hasn't broken because of that, so it must not be true. right.....

[a_ahmed]

mmm wow... . never seen something like that in my life. Insane.

[johngriff]

Cool first post.

Rest of the thread makes me hate the internet.

[S14DB]

Cool first post.

Rest of the thread makes me hate the internet.

Yeah I think Comic Book Nerds argue less about shit that doesn't matter.