SR20, s15 t28 questions. - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

.jrmyrmx · 03-22-2010, 12:25 PM

I have recently installed a s15 t28 turbo, Mishimoto electric fan shroud and Nismo FPR. I have yet to install a z32 MAF, bigger injectors or tune the ECU. Other parts i have installed include: FMIC, Mishimoto rad, 3" straightback exhaust. How high can i set the boost and still keep my car running nice and smooth? Have i solved my fuel problems temporarily by installing the FPR? What should i set my fuel pressure to?

thank you

Z33dori · 03-22-2010, 12:27 PM

it will help if u have a wideband that will help

also a HKS wastegate actuator

.jrmyrmx · 03-22-2010, 12:35 PM

I actually have the HKS actuator, forgot to mention it though. are you talking about a wideband A/F sensor?

VNG704 · 03-22-2010, 12:54 PM

with bigger injectors and the ecu tuned for your parts, you could do 17-18psi (imo)max on the s15 turbo. Although, I've "heard" guys go 19+. Use the stock fuel pressure.

.jrmyrmx · 03-22-2010, 01:25 PM

Quote:

Originally Posted by VNG704

with bigger injectors and the ecu tuned for your parts, you could do 17-18psi (imo)max on the s15 turbo. Although, I've "heard" guys go 19+. Use the stock fuel pressure.

well i dont have money to do that for a little while so i got the fpr so i could turn up the pressure to solve my running lean problem the bigger turbo created. can i boost up to 15psi safely now that my engine is cooled and (hopefully) fueled right or do i have to wait till i get tuned and stuff?

Sileighty_85 · 03-22-2010, 03:04 PM

I dont know why ppl think S15 turbos are any different.

There is only one model of the S15 turbo thats any different and the only difference is the Exhaust housing has a divider for the W/G

And it seems the P/N are different due to Tranmissions also

So if you have this part number, then you have an "S14" Turbo

If you have this part number then you will have an "S15" turbo with the divider: But that is the only difference

Max PSI is 16psi any higher and it will fail, I just had a customers T28 seize from boosting at 17-18 PSI

03-22-2010, 12:25 PM	#1
.jrmyrmx Leaky Injector Join Date: Apr 2008 Location: Denver, CO Posts: 145 Trader Rating: (1) Feedback Score: 1 reviews	SR20, s15 t28 questions. I have recently installed a s15 t28 turbo, Mishimoto electric fan shroud and Nismo FPR. I have yet to install a z32 MAF, bigger injectors or tune the ECU. Other parts i have installed include: FMIC, Mishimoto rad, 3" straightback exhaust. How high can i set the boost and still keep my car running nice and smooth? Have i solved my fuel problems temporarily by installing the FPR? What should i set my fuel pressure to? thank you

03-22-2010, 12:27 PM	#2
Z33dori Post Whore! Join Date: Dec 2006 Location: Riverview, FL Age: 35 Posts: 5,557 Trader Rating: (12) Feedback Score: 12 reviews	it will help if u have a wideband that will help also a HKS wastegate actuator __________________

03-22-2010, 03:04 PM	#6
Sileighty_85 Post Whore! Join Date: Dec 2006 Location: Misawa, Japan Posts: 6,815 Trader Rating: (8) Feedback Score: 8 reviews	I dont know why ppl think S15 turbos are any different. There is only one model of the S15 turbo thats any different and the only difference is the Exhaust housing has a divider for the W/G And it seems the P/N are different due to Tranmissions also So if you have this part number, then you have an "S14" Turbo If you have this part number then you will have an "S15" turbo with the divider: But that is the only difference Max PSI is 16psi any higher and it will fail, I just had a customers T28 seize from boosting at 17-18 PSI __________________ 後輪駆動車１番 1989 Built SR GT2871R -363whp 1998 S14 W/RB25- 250ish (For Now) 1986 SR86 - 200ish 1990 R32 GTR - 320hp Don't Buy Engines from JDM-Online http://zilvia.net/f/businesses/207457-jdm-online.html Don't Buy XS-Power or SSAC Shit

03-22-2010, 12:35 PM	#3
.jrmyrmx Leaky Injector Join Date: Apr 2008 Location: Denver, CO Posts: 145 Trader Rating: (1) Feedback Score: 1 reviews	I actually have the HKS actuator, forgot to mention it though. are you talking about a wideband A/F sensor?

03-22-2010, 12:54 PM	#4
VNG704 Zilvia FREAK! Join Date: Dec 2008 Location: Wisconsin Posts: 1,575 Trader Rating: (17) Feedback Score: 17 reviews	with bigger injectors and the ecu tuned for your parts, you could do 17-18psi (imo)max on the s15 turbo. Although, I've "heard" guys go 19+. Use the stock fuel pressure.