Race Head

[SILVIA_KIDs14.5]

how much power do you guys think i could get out of this set up on a 95, 96 s14 Blacktop sr
(i searched first by the way)
Jun racing stage1+ cam package cams 268
(package includes ti valve springs, ti retainers and seats
adj. cam gears)
BC +1 oversized valves
JTW guides
greddy rocker arm stopper
tomei solid piviot
cometic phuzion headgasket 1.8 3 layer
full port and polish
shaved head
sard type RJ fuel pressure regulator and s.s. fuel lines
oh yeah got the s14 GT28R turbo
let me know wut you think trying to push as much as possible with it

[Slidin240Wayz]

You will find out once you get it tuned.

[Hooorahh!]

true^ also i hope u get some type of injectors? engine manegment? and how much psi would u be running it on ? plus that T28 i doubt, well i never seen that one go past or even seen it hit 300whp maybe 270whp maxing it out ... if it was a s15 bb turbo then it would be easier to get near 300....

[Wahl 136]

Why would you put adjustable cam gears in a S14 SR? Getting rid of the VVT essentially makes it no different than a redtop.

[Slidin240Wayz]

It's all over the place.

A head build up does not give you more power besides the cams, everything else is for safety.

[steve shadows]

Why would you put adjustable cam gears in a S14 SR? Getting rid of the VVT essentially makes it no different than a redtop.

N-VCT varies the timing of the valves by rotating the cam shaft(s), valve lift and duration are NOT altered. The system is implemented with an electric solenoid which is controlled by the cars ECU.

theoretically you could put an adjustable sprocket on the exaust cam of the rwd sr20det to add overlap without changing the cams, or if you install 256 cams you could also do this (with the vtc compatible cams).

The intake cam vtc sprocket/motor must stay the same if you would like to retain the vtc however.


cometic phuzion headgasket 1.8 3 layer


and to the OP, wtf? 1.8 mm? Are you trying to lower your compression to 8.0:1 or maybe even lower.

cometic hg are garbage btw. I had a whole thread on FA bashing the crap out of it. the dowl holes dont even line up they are like 4 mm too large on some holes.

Get a HKS/PE/Tomei or Apexi if you can find one.

I would go wtih a .08 head gasket, should yeild at 8.8:1 comp ratio. maybe 9:1 depending on amount of material removed from head and block deck

-steve

[SILVIA_KIDs14.5]

true^ also i hope u get some type of injectors? engine manegment? and how much psi would u be running it on ? plus that T28 i doubt, well i never seen that one go past or even seen it hit 300whp maybe 270whp maxing it out ... if it was a s15 bb turbo then it would be easier to get near 300....
yeah forgot to tell yeah i got s15 480cc injectors with a tomei racing ecu that is tuned for high lift cams and 480cc injectors boost cut rev raised and speed cut fuel remap ect.

[SILVIA_KIDs14.5]

Why would you put adjustable cam gears in a S14 SR? Getting rid of the VVT essentially makes it no different than a redtop.
because once you throw cams in the s14 the vvt goes away anyways well at least im pretty sure of that one unless some one knows sumthing i don't

[SILVIA_KIDs14.5]

true^ also i hope u get some type of injectors? engine manegment? and how much psi would u be running it on ? plus that T28 i doubt, well i never seen that one go past or even seen it hit 300whp maybe 270whp maxing it out ... if it was a s15 bb turbo then it would be easier to get near 300....
talked to garret the only difference on the s15 is stronger interals and better wastegate managment

Source
Stock Output
Stock Turbo
Features
Identification
1991-1993
202 [email protected] rpm
Garrett T25, 0.64A/R Exhaust,
High-port head, 370cc/min injectors
Red valve cover
S13 Silvia & 180SX
203 [email protected]
0.80A/R Compressor


1994-1998 S13 180SX
202 [email protected] rpm
Garrett T25, 0.64A/R Exhaust
High-port head, 370cc/min injectors
Black valve cover, flat on top

203 [email protected] rpm
0.80A/R Compressor


1994-1998 S14 Silvia
217 [email protected] rpm
Garrett T28, ball bearing 0.64A/R
Low-port head, VTC variable intake
Black valve cover with a hump

203 [email protected] rpm
Exhaust 0.60A/R T04B Compressor
cam timing 370cc/min injectors
that peaks at cylinder No. 3
1999-2001 S15 Silvia
247 [email protected] rpm
Garrett T28 ball bearing, 0.64A/R
Low-port head, VTC variable intake
Black valve cover with a hump
(manual trans only)
202 [email protected] rpm
Exhaust, 0.60A/R T04B Compressor
cam timing, 444cc/min injectors, better materials in turbo and better wastegate flow design
that peaks at cylinder No. 3
sorry bout the 3 post in a row still learning how to post and stuff

[Casascacas]

The power is in the cams and the valve job. Get somebody that knows what they are doing to do the valve job for you. Oh and gasket matching never hurts anything.

[steve shadows]

you talked to garrett about sr20det differences?

thats like calling Hollywood Video and asking about television set quality.

Internals are not "stronger" the bottom end is almost identical in quality and power handling.

Top end and oil passages in some places are different.

[SILVIA_KIDs14.5]

The power is in the cams and the valve job. Get somebody that knows what they are doing to do the valve job for you. Oh and gasket matching never hurts anything.
iat good looks jus was wondering how you guys thought my set up would be thanks alot man

[SILVIA_KIDs14.5]

you talked to garrett about sr20det differences?

thats like calling Hollywood Video and asking about television set quality.

Internals are not "stronger" the bottom end is almost identical in quality and power handling.

Top end and oil passages in some places are different.
ok so shoot me i was just talkin about the turbo similarites not the sr similarities but thanks for the insite

[Casascacas]

iat good looks jus was wondering how you guys thought my set up would be thanks alot man


Well partswise your setup sounds good to me. Nothing cheap there.

[Nikeboy355]

you are going to be limited by your turbo and the injectors...

get a larger turbo, bigger injectors, retune, and rev that thing to 8500...

400WHP should be pretty easy...

[SILVIA_KIDs14.5]

you are going to be limited by your turbo and the injectors...

get a larger turbo, bigger injectors, retune, and rev that thing to 8500...

400WHP should be pretty easy...
thanks dude at least some is willing to help the newbie

[DOOK]

as stated before you top end really isn't going to help with making power other than the cams, the rest is so you can run at higher RPMs without have to worry as much. using the 1.8 head gasket will actually lower your compression essentially making you lose power with everything else being equal. You should bump up to the garrett GT2871 probably and some 740cc injectors and get a REAL tune.

[SILVIA_KIDs14.5]

as stated before you top end really isn't going to help with making power other than the cams, the rest is so you can run at higher RPMs without have to worry as much. using the 1.8 head gasket will actually lower your compression essentially making you lose power with everything else being equal. You should bump up to the garrett GT2871 probably and some 740cc injectors and get a REAL tune.
I'm goin to be milling the head and shving it so it won't really losse andy compression and as far as a real tune its tuned by Tomei Racing!!!! and i upgraded the injectors to 480cc the spec r injectors

[DOOK]

Tomei racing tuned your car with everything you've done to the head? Or is it a ROM tuned ECU? by REAL tune I mean a tuner actually watching your A/F while it's on a dyno and tuning it realtime for your specific mods. Every car runs different, even with the same exact mods, just the way it is, ROM tunes are good if you have a completely stock motor with only external mods, you have more than that.

[SILVIA_KIDs14.5]

Tomei racing tuned your car with everything you've done to the head? Or is it a ROM tuned ECU? by REAL tune I mean a tuner actually watching your A/F while it's on a dyno and tuning it realtime for your specific mods. Every car runs different, even with the same exact mods, just the way it is, ROM tunes are good if you have a completely stock motor with only external mods, you have more than that.
oh yeah im goin to be doing that and yeah for the most part except the port and polish Tomei racing tuned my car and its a ROM tuned ECU by them that i sent out thanks thought you were like busting on my ecu tune should have read more carefully thanks for the in site and help:hsdance: if you wanna see the specs im gonna post them up on the site of what the ecu is capable of

[SILVIA_KIDs14.5]

hey guys here ar the specs on the ECU thanks


System 1` Boost Up (ROM tuned) ECU setup for the S14 Kouki (94~96 S14 Silvia) engine SR20DET by `The Engine Specialist`, TOMEI.<p>
The TOMEI `System 1` ECU is setup for stock to lightly modified SR engines looking for around the 280hp range.<p>
The MAF setting for this ECU is the OEM unit and can be used with the OEM cams or along with hi-lift `PONCAM` camshafts, OEM 370cc injectors (will also work with 444cc/480cc), standard turbine and fuel pump.<p>
As a standard with TOMEI ROM tuned ECU`s the following refinements have been made:
<p>
1. Eliminate top speed limiter
<p>
2. Shift rev limiter timing (7500rpm)
<p>
3. Eliminate boost limiter (~1.0bar)
<p>
4. Modification of fuel correction map and Ignition map
<p>
5. Change quorum (k)
<p>
6. Change lattice of the map (RPM, injection time)
<p>
7. Modify every correction points

[OBEEWON]

Sliding240ways said what i was going to say. Only cams injectors turbine really matter, everything else just lets you not explode things.

For power I think you might be able to get over 300, but that turbo doesn't deserve those cams. You will have quick spool though.

[OBEEWON]

Oh yeah unless you are getting a custom tune you are still going to need to get tuned on a secondary unit, ROMs are ballpark and usually pig rich.


The best thing to do for you would be to look at some dyno sheets in the range of your desired power and try to emulate the setups with the power curve that most appeals to you. It's probably too late but I did that for 2 months before I chose my turbo and injectors.

[lazierhobo]

with that size turbo, going 1mm oversize on the valves is actually going to cost you performance. when you go to a larger valve, you decrease intake air velocity, thus costing you performance.
unless....you have a massive turbo where you are pushing so much air that the volume of the port actually comes into play. in almost all cases, all that needs to be done for a port and polish on an sr head is to clean up any casting defects, and polish everything up.

[bigOdom1]

most people are right with what they said about turbo but it will be close or just over 300 with a good tune thats just all its got maybe with planets aligned 320

[DOOK]

Oh yeah unless you are getting a custom tune you are still going to need to get tuned on a secondary unit, ROMs are ballpark and usually pig rich.


I'd rather be rich than lean, fo sho

[johngriff]

Not JWT Rich. Believe it!