Boost question - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

1eightySX · 05-19-2007, 01:19 AM

Ok, I have been doing some reading on here and have found alot of valuable information but figured I would ask just verify. I have a redtop sr20det, I have just had the bottom end of my engine rebuilt and installed the walbro 255 fuel pump. I was wondering what is a safe amount of boost to run. Aside from the the fuel pump there are only minor mods such as exhaust, down pipe and front mount intercooler. I am not looking to make a huge amount of power but a resonable amount, idealing 265 if possible. Which leads me to my next question, what mods will help me uptain the goal of 265 hp?

speed_racerx · 05-19-2007, 01:38 AM

get a bigger turbo i.e. S15 T28 or GT2871r

safe boost for stock t25 would be anywhere up to 14psi iirc

street240 · 05-19-2007, 01:48 AM

Go with the hybrid dynamics tune, an s15 turbo and some injectors and call it a day. You will be money for 265. You are looking at 1200 if you shop accordingly...

*slider2828* · 05-19-2007, 01:58 AM

12 is safer for a t25. 14 is asking to blow an oil seal in less than 1 year. t28 14psi is ok, but definately need a t28 to get 265.

1eightySX · 05-19-2007, 10:04 AM

Ok cool, thanks for the advice. Just wanted to make sure it was safe to turn the boost up eventhough i have not upgraded my injectors.

*fliprayzin240sx* · 05-19-2007, 11:52 AM

Well you crank the boost up, you still need a way to add more fuel since youre pushing more air. Either a SAFC or an adjustable FPR to add extra fuel. I know a guy personally hit 261 to the wheels with a stock T25, then again he had almost everybolt on I can think of on a Power FC tuned.

05-19-2007, 01:19 AM	#1
1eightySX Leaky Injector Join Date: Sep 2006 Location: canada Posts: 100 Trader Rating: (0) Feedback Score: 0 reviews	Boost question Ok, I have been doing some reading on here and have found alot of valuable information but figured I would ask just verify. I have a redtop sr20det, I have just had the bottom end of my engine rebuilt and installed the walbro 255 fuel pump. I was wondering what is a safe amount of boost to run. Aside from the the fuel pump there are only minor mods such as exhaust, down pipe and front mount intercooler. I am not looking to make a huge amount of power but a resonable amount, idealing 265 if possible. Which leads me to my next question, what mods will help me uptain the goal of 265 hp?

05-19-2007, 01:48 AM	#3
street240 Zilvia Junkie Join Date: Jan 2007 Location: Rapid Posts: 502 Trader Rating: (0) Feedback Score: 0 reviews	Go with the hybrid dynamics tune, an s15 turbo and some injectors and call it a day. You will be money for 265. You are looking at 1200 if you shop accordingly... __________________ The Gallo 24 would be a better motor for my skyline...But I am waiting on the swap dvd...

05-19-2007, 11:52 AM	#6
fliprayzin240sx Man w/ CTSV & a Car Seat Join Date: Aug 2002 Location: Tampa Posts: 17,998 Trader Rating: (19) Rides Gallery: fliprayzin240sx Feedback Score: 19 reviews	Well you crank the boost up, you still need a way to add more fuel since youre pushing more air. Either a SAFC or an adjustable FPR to add extra fuel. I know a guy personally hit 261 to the wheels with a stock T25, then again he had almost everybolt on I can think of on a Power FC tuned. __________________ If you think Zilvia has too many assholes... CLICK HERE!!!

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05-19-2007, 01:38 AM	#2
speed_racerx Zilvia Junkie Join Date: Sep 2005 Location: Houston Age: 33 Posts: 523 Trader Rating: (6) Feedback Score: 6 reviews	get a bigger turbo i.e. S15 T28 or GT2871r safe boost for stock t25 would be anywhere up to 14psi iirc

05-19-2007, 01:58 AM	#4
slider2828 Premium Member Join Date: Oct 2004 Location: San Francisco, CA Posts: 5,824 Trader Rating: (13) Feedback Score: 13 reviews	12 is safer for a t25. 14 is asking to blow an oil seal in less than 1 year. t28 14psi is ok, but definately need a t28 to get 265.

05-19-2007, 10:04 AM	#5
1eightySX Leaky Injector Join Date: Sep 2006 Location: canada Posts: 100 Trader Rating: (0) Feedback Score: 0 reviews	Ok cool, thanks for the advice. Just wanted to make sure it was safe to turn the boost up eventhough i have not upgraded my injectors.