In light of my bad track times, I had to hit the dyno to
find out what was going on. The dyno runs were done in
4th gear. On every run the HP falls off after 6k rpms.
Stock boost 7 psi
5k rpms - 145 hp & 151 tq.
6k rpms - 122 hp & 107 tq.
16 psi & 15 deg timing
5k rpms - 223 hp & 234 tq.
6k rpms - 191 hp & 166 tq.
The tech said my car was running lean and I needed more fuel.
16 psi & 18 deg timing
5k rpms - 220 hp & 231 tq.
6k rpms - 200 hp & 175 tq.
I know most recommend 15 deg timing for the GTIR but it
stayed strong in the upper rpm range at 18 than 15 did.
Any ideas where I'm losing out at? I'm going to get my fuel
pump, fuel regulator and 3 inch exhaust and try this again.
Anything else I should look for? Help me out!

Originally posted by Slow 96R
Anything else I should look for? Help me out!

I think it's your name "Slow 96R " Bad MOJO. Plus it gives your car an inferiority complex.;)

Originally posted by 98sr20ve


I think it's your name "Slow 96R " Bad MOJO. Plus it gives your car an inferiority complex.;)

Ha ha ha! I'm hoping it's something more complexed than that :rolleyes: I like my screen name by the way :p It was my way of being sarcastic because everyone was saying 96s where slow. My car was pretty quick! Now to make it go faster, help!!!

Originally posted by Slow 96R
In light of my bad track times, I had to hit the dyno to
find out what was going on. The dyno runs were done in
4th gear. On every run the HP falls off after 6k rpms.
Stock boost 7 psi
5k rpms - 145 hp & 151 tq.
6k rpms - 122 hp & 107 tq.
16 psi & 15 deg timing
5k rpms - 223 hp & 234 tq.
6k rpms - 191 hp & 166 tq.
The tech said my car was running lean and I needed more fuel.
16 psi & 18 deg timing
5k rpms - 220 hp & 231 tq.
6k rpms - 200 hp & 175 tq.
I know most recommend 15 deg timing for the GTIR but it
stayed strong in the upper rpm range at 18 than 15 did.
Any ideas where I'm losing out at? I'm going to get my fuel
pump, fuel regulator and 3 inch exhaust and try this again.
Anything else I should look for? Help me out! What turbo setup are u using and what bar program?

what ecu are you running?

I've got a GTIR motor with the IC in the front, stock snail (T28) 50lb injectors in the stock fuel rail, cobra maf, 3 bar JWt ecu.

netter question what fuel pump are u running?

Originally posted by Yellow4g63
netter question what fuel pump are u running?

Stock fuel pump:eek:

DUH Put a High Flow in there. Supra TT or 300ZX or Walbro that should help alot at the boost levels ur running.

Originally posted by Slow 96R
In light of my bad track times, I had to hit the dyno to
find out what was going on. The dyno runs were done in
4th gear. On every run the HP falls off after 6k rpms.
Stock boost 7 psi
5k rpms - 145 hp & 151 tq.
6k rpms - 122 hp & 107 tq.
16 psi & 15 deg timing
5k rpms - 223 hp & 234 tq.
6k rpms - 191 hp & 166 tq.
The tech said my car was running lean and I needed more fuel.
16 psi & 18 deg timing
5k rpms - 220 hp & 231 tq.
6k rpms - 200 hp & 175 tq.
I know most recommend 15 deg timing for the GTIR but it
stayed strong in the upper rpm range at 18 than 15 did.
Any ideas where I'm losing out at? I'm going to get my fuel
pump, fuel regulator and 3 inch exhaust and try this again.
Anything else I should look for? Help me out!

Buy the way stock boost psi on a GTi-R is suppost to be about 10psi.

Originally posted by charlie2020


Buy the way stock boost psi on a GTi-R is suppost to be about 10psi.

Oh really :confused: My car won't boost above 8 psi with the Profec B off. With the Profec B on it won't go below 10. Is this a sign of something else being wrong? BOV maybe? Let me. I won't to get all of the grimlins out before I go back to the track :cool:

Buy the way stock boost psi on a GTi-R is suppost to be about 10psi
That is if he had the intercooler on the stock location

The wastegate actuator on the GTi-R is adjustable try taking out the slack so that the wastegate door is shut firmly and then some (little bit more maybe 1 more turn or so but not to much). Or if you want to do it the more accurate way place a vacumm/pressure pump with guage to the wastegate actuator and pump in your desired amount 10psi and adjust the wastegate actuator rod so that it fits back on to the wastegate lever (the wastegate door should be in the closed position) and now you wastegate door won't open until 10psi is present. Hope this helps.

Originally posted by Hector Firpo

That is if he had the intercooler on the stock location

Possibly because of pressure drop but it still can be adjusted to 10psi buy shortening the wastegate actuator rod. SEE THE ABOVE POST.

I've got a GTIR motor with the IC in the front, stock snail (T28) 50lb injectors in the stock fuel rail, cobra maf, 3 bar JWt ecu. This is a list of your parts. Now lets analyze. First of all if u look at your turbo(t28) it is probably already maxed out. I think it is rated to @260hp. So even if u have 50lb injectors(rated to 400hp), 3 bar program(45psi of fuel), Cobra MAF(360hp), your T28 is still your weak link. You are maxing out the turbo before everything else. So your dyno chart is probably correct for a turbo that size.

Before u go out buying parts do your research to match your parts. Even if you buy a new fuel rail and pump, you are running a 3 bar program(45psi) and the stock fuel pressure regulator is set at 48psi maximum, so you will do no justice by going with a new fuel rail and pump when your main concern for more output should be your turbo. Just read the FAQ on the turbo forum.

FYI you could of probably used 370cc injectors and the stock MAFwhich reads up to 280hp and still got the same dyno results(and save some money). Do your research first. Try here http://www.sr20deforum.com/showthre...light=300zx+MAF and here http://www.sr20deforum.com/showthread.php?s=&threadid=18137

Roll-Mod-L is right.

If you were to use 370cc on the stock 3bar FPR you could safetly put down around 240hp at .85% DC. I wouldn't go above this point you want to leave your self a desent margin for error although you could push 280hp at 100% DC which is not good for you, engine, or injectors.

NOTE: Most pintle injectors will increase flow rates up to 88%, 92% with Disc injectors, and then go "semi-static", half open-half closed, just before going full static. This time-out event occurs at different time/pulse width durations, in different injectors, but always produces a 50% or so Duty Cycle flow rate. This extremely dangerous situation will usually occur at the worst of times, full throttle-max boost-high RPM- just when you need 100% fuel delivery you get 50% and go dead lean. BANG!!! This problem seems to amplify a bit at higher pressures

dude, those numbers are way low.

do you still have stock exhaust?

i did 250 whp and 261 lb-ft on the stock T25 with 370's @ ~12-13 psi on C16

Originally posted by HotshtSR20
dude, those numbers are way low.

do you still have stock exhaust?

i did 250 whp and 261 lb-ft on the stock T25 with 370's @ ~12-13 psi on C16 Also remember unlike your runs his was done in 4th gear on 7lbs of boost and probably pump gas.