how much should i boost? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

champwho · 01-01-2012, 03:32 PM

got a sr20 redtop brian crowr valve springs and retainers and the rest of the motor is basically stock and got a tomei arms b7652 740 injectors 3 inch piping blotz fmic how much should i boost on this setup i wana know if i can be aroun d 300hp and if its safe or not

*brndck* · 01-01-2012, 03:34 PM

Here what you need.
A good tune from a reliable tuner.
Get a power fc or aem or something similar.
Or at least a rom tune.

champwho · 01-01-2012, 03:36 PM

i have a power fc sorry forgot to mention that

*brndck* · 01-01-2012, 03:54 PM

then make an appointment at driftspeed, and get that shit handled.
shouldn't be a problem to hit 300hp with that turbo and injectors.

*fliprayzin240sx* · 01-01-2012, 07:50 PM

How much you can boost will depend on the tune...

Walperstyle · 01-01-2012, 08:04 PM

Yeah, someone with a dyno will help you. It will be easier if you have a stand alone. Get a Vipec if you want to do some crazy stuff.

champwho · 01-02-2012, 12:13 AM

dont want anything crazy just 300hp would be good for me maybe even more cause i wanna daily it still....how much does driftspeed charge?

chineseb0i · 01-02-2012, 12:43 AM

what turbo you have? T25 or T28? Usually for both turbos it's recommended you not boost more than 15 psi since the turbo doesn't run efficiently pass that point. 260 rear wheel hp is what you should be able to achieve.

KoukiDrifter240 · 01-02-2012, 12:52 AM

advice keep low boost and be happy u will get hungry for more but u will eventually break it happens to the best of us lol

colombianbryan · 01-02-2012, 01:12 AM

with that turbo/setup you have there im certain you will hit 300whp easily with a good tune!

champwho · 01-02-2012, 01:42 AM

Quote:

Originally Posted by chineseb0i

what turbo you have? T25 or T28? Usually for both turbos it's recommended you not boost more than 15 psi since the turbo doesn't run efficiently pass that point. 260 rear wheel hp is what you should be able to achieve.

well i though that 15psi for stock turbos... i dont have a stock turbo i have a pretty decent turbo i heard my turbo can run with teh gt28 turbos so not to sure but thats what i heard and naw i dont get throttle happy but to have that much power will be great and im sure i wont step on it cause gas isnt cheap ahah

Kingtal0n · 01-04-2012, 12:31 PM

The general rule is you dont go over 18psi on 93 octane pump gas with any sr20 and any turbocharger unless specific modifications have been done to eliminate this general rule.

at 18psi, with 95%VE at 7,000rpm, and an efficient turbocharger/intercooler, most SR20's will see between 370-400RWHP.

In your OEM redtop internal "shoes" I would stick to 15psi or less, probably 12psi max, to assure under 300rwhp so you don't spit a piston ring- assuming the compressor actually flows 32+lbs/min.

RyanKuly180sx · 01-20-2012, 03:45 PM

Quote:

Originally Posted by champwho

well i though that 15psi for stock turbos... i dont have a stock turbo i have a pretty decent turbo i heard my turbo can run with teh gt28 turbos so not to sure but thats what i heard and naw i dont get throttle happy but to have that much power will be great and im sure i wont step on it cause gas isnt cheap ahah

My Red Top is running at 11lbs and its plenty.(Swapped in a t2871r during the swap) Still enough to get a little sideways around corners in the city...

Specs say up to 15lbs stock, but I haven't tried it..

The black tops are made with Denser Aluminum and shit, so I would only be pushing the boost passed 12psi on one of those. Especially if your mostly stock.

cotbu · 01-20-2012, 03:57 PM

You ever just wanna punch someone in the face!

Anyway the sleeves are steel!

Sent from my Highly Tuned Vibrant!

champwho · 01-21-2012, 07:38 PM

ok so im at 14/ or 15 psi my boost guage doesnt mark it that well.. and i have a powerfc and fc commander bc cams the 264 i believe and a tomei arms b7652 and i dont know how to adjust the boost because the wastegate isnt adjustable

Sileighty_85 · 01-21-2012, 07:50 PM

Quote:

Originally Posted by RyanKuly180sx

The black tops are made with Denser Aluminum and shit, so I would only be pushing the boost passed 12psi on one of those. Especially if your mostly stock.

What the hell are you talking about? Are you one of those kids that think Engines are rated by boost and not HP?

Quote:

Originally Posted by champwho

ok so im at 14/ or 15 psi my boost guage doesnt mark it that well.. and i have a powerfc and fc commander bc cams the 264 i believe and a tomei arms b7652 and i dont know how to adjust the boost because the wastegate isnt adjustable

Ummm a boost controller.....

champwho · 01-21-2012, 08:50 PM

Quote:

Originally Posted by Sileighty_85

What the hell are you talking about? Are you one of those kids that think Engines are rated by boost and not HP?

Ummm a boost controller.....

wow now i feel dumb i new that all along sometimes i dont think straight ahah

01-01-2012, 03:32 PM	#1
champwho Zilvia Member Join Date: Apr 2011 Location: perris california Age: 33 Posts: 290 Trader Rating: (8) Feedback Score: 8 reviews	how much should i boost? got a sr20 redtop brian crowr valve springs and retainers and the rest of the motor is basically stock and got a tomei arms b7652 740 injectors 3 inch piping blotz fmic how much should i boost on this setup i wana know if i can be aroun d 300hp and if its safe or not

01-01-2012, 07:50 PM	#5
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	How much you can boost will depend on the tune... __________________ If you think Zilvia has too many assholes... CLICK HERE!!!

01-01-2012, 08:04 PM	#6
Walperstyle Nissanaholic! Join Date: Nov 2004 Location: Alberta, Red Derp Age: 44 Posts: 1,729 Trader Rating: (0) Feedback Score: 0 reviews	Yeah, someone with a dyno will help you. It will be easier if you have a stand alone. Get a Vipec if you want to do some crazy stuff. __________________ KA-T ORG-Function over Flush

01-02-2012, 12:43 AM	#8
chineseb0i Zilvia Addict Join Date: Feb 2003 Location: Bay Area (CA) Age: 40 Posts: 853 Trader Rating: (7) Feedback Score: 7 reviews	what turbo you have? T25 or T28? Usually for both turbos it's recommended you not boost more than 15 psi since the turbo doesn't run efficiently pass that point. 260 rear wheel hp is what you should be able to achieve. __________________ 89 240sx Coupe

01-02-2012, 12:52 AM	#9
KoukiDrifter240 Zilvia Member Join Date: Jun 2009 Location: California Posts: 249 Trader Rating: (5) Feedback Score: 5 reviews	advice keep low boost and be happy u will get hungry for more but u will eventually break it happens to the best of us lol __________________ farewell kouki!

01-01-2012, 03:36 PM	#3
champwho Zilvia Member Join Date: Apr 2011 Location: perris california Age: 33 Posts: 290 Trader Rating: (8) Feedback Score: 8 reviews	i have a power fc sorry forgot to mention that

01-02-2012, 12:13 AM	#7
champwho Zilvia Member Join Date: Apr 2011 Location: perris california Age: 33 Posts: 290 Trader Rating: (8) Feedback Score: 8 reviews	dont want anything crazy just 300hp would be good for me maybe even more cause i wanna daily it still....how much does driftspeed charge?

01-02-2012, 01:12 AM	#10
colombianbryan Zilvia Junkie Join Date: Sep 2010 Location: Atlanta, GA Age: 33 Posts: 430 Trader Rating: (8) Feedback Score: 8 reviews	with that turbo/setup you have there im certain you will hit 300whp easily with a good tune! __________________ I love drifting into curbs and guardrails

01-04-2012, 12:31 PM	#12
Kingtal0n Post Whore! Join Date: Jul 2005 Location: South Florida Age: 42 Posts: 4,829 Trader Rating: (17) Feedback Score: 17 reviews	The general rule is you dont go over 18psi on 93 octane pump gas with any sr20 and any turbocharger unless specific modifications have been done to eliminate this general rule. at 18psi, with 95%VE at 7,000rpm, and an efficient turbocharger/intercooler, most SR20's will see between 370-400RWHP. In your OEM redtop internal "shoes" I would stick to 15psi or less, probably 12psi max, to assure under 300rwhp so you don't spit a piston ring- assuming the compressor actually flows 32+lbs/min.

01-20-2012, 03:57 PM	#14
cotbu Post Whore! Join Date: Sep 2005 Location: SWFL Age: 50 Posts: 3,318 Trader Rating: (3) Feedback Score: 3 reviews	You ever just wanna punch someone in the face! Anyway the sleeves are steel! Sent from my Highly Tuned Vibrant! __________________ LoverTechnologies "Half Broken Things!"

01-21-2012, 07:38 PM	#15
champwho Zilvia Member Join Date: Apr 2011 Location: perris california Age: 33 Posts: 290 Trader Rating: (8) Feedback Score: 8 reviews	ok so im at 14/ or 15 psi my boost guage doesnt mark it that well.. and i have a powerfc and fc commander bc cams the 264 i believe and a tomei arms b7652 and i dont know how to adjust the boost because the wastegate isnt adjustable