broadheadjohn

How many hp gain per # of boost on average? what is a safe boost level for a stock B18? I have a 99 gsr with 274 hp @ 8 pnds tuned on crome. The tuner said I could run higher boost safely up to 10 pounds. Thoughts?

supermonkey

ive seen 12pounds safely on a stock 94 gsr for a year..

broadheadjohn

10 pounds should be good for awhile then, right? I think that should put me over 300hp.

supermonkey

ya tuned properly 10 psi will make u over 300hp safely

Schister66

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by supermonkey &raquo;</TD></TR><TR><TD CLASS="quote">ya tuned properly 10 psi will make u over 300hp safely</TD></TR></TABLE>

never once was any specific turbo mentioned...how do you know what kind of power he can make at X psi?? On less than 11psi (stock MAP limit) it is entirely possible to make 300-350whp on a stock LS without sacrificing drivability...there are several turbos that would work well for you, but there are a few that would work better than others....PM me if you want more info

broadheadjohn

the turbo is a t3/t4 with a 57 trim. It is tuned @8 pnds but the tuner said the map was "linear" and I could up the boost and the tune would still be fine.

Tchleung

goto a different tuner. Whenever you "UP' the boost, you want to retune it. Chances are yes it may be close but there is a chance that it is way off.

Akalima

ive got a 99 gsr and am running 6psi low and 10.5 high. Im gussing im making around 300whp. Ive had no problems ohter than losing turbo bolts for the past 3 years. Traction well thats another issue all together. Good luck and have fun hunting srt's!

jDMJeRk

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by broadheadjohn &raquo;</TD></TR><TR><TD CLASS="quote">How many hp gain per # of boost on average? what is a safe boost level for a stock B18? I have a 99 gsr with 274 hp @ 8 pnds tuned on crome. The tuner said I could run higher boost safely up to 10 pounds. Thoughts?</TD></TR></TABLE>
What kind of turbocharger is it?

broadheadjohn

turbonetics

Schister66

To answer the original question, on a stock B18b w/ a T3/T04E 57trim .63 ar turbo, you could run as much as 14psi without really having to worry too much...that would put you in the 350whp range...its been done before.

But for reliabilities sake, you should stay in the 10-11psi range....whatever the stock map sensor allows you to tune up to...that will make more than enough power for you to have fun

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Akalima &raquo;</TD></TR><TR><TD CLASS="quote">ive got a 99 gsr and am running 6psi low and 10.5 high. Im gussing im making around 300whp. Ive had no problems ohter than losing turbo bolts for the past 3 years. Traction well thats another issue all together. Good luck and have fun hunting srt's!</TD></TR></TABLE>

what was the relevance?

ForceFed Motorsports

He said hes got a gsr which i would assume hes not talking about a B18B ls motor, you could throw as much boost as you want in a ls

As for a gsr i would stick to no more than 11lbs just for reliability and so that you dont have to upgrade your map sensor, unless you plan on more boost in the future.





Modified by ForceFed_Motorsports at 11:33 AM 4/15/2007

Snafubmx234

PSI HAS NOTHING TO DO WITH RELIABILITY/LONGEVITY!!!!!!!!!!!!!

RPM and power production blows motors.

ForceFed Motorsports

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Snafubmx234 &raquo;</TD></TR><TR><TD CLASS="quote">PSI HAS NOTHING TO DO WITH RELIABILITY/LONGEVITY!!!!!!!!!!!!!

RPM and power production blows motors. </TD></TR></TABLE>

Explain...

ragethemachine86

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ForceFed_Motorsports &raquo;</TD></TR><TR><TD CLASS="quote">Explain...</TD></TR></TABLE>

300whp @ 7psi = 300whp @ 15psi

Both examples put the same amount of stress on the motor if their tunes are of the same quality.

ForceFed Motorsports

Thanks i understand that i just didnt understand how he worded it.

Rooftop voter

iTrader: (1)

So what would be the maximum safe HP for b18 motors stock? I've heard from a few different people that 300 was the max that you'd want to do to keep it safe, although others have done more and had no problems, just as a general rule.

chet

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Snafubmx234 &raquo;</TD></TR><TR><TD CLASS="quote">PSI HAS NOTHING TO DO WITH RELIABILITY/LONGEVITY!!!!!!!!!!!!!

RPM and power production blows motors. </TD></TR></TABLE>

and bad tuning.

stewie8apie

I've put over 10,000 miles on my b18 and I drive it pretty hard every day. ~7,000 are at 250hp and the rest are at 357. It's all in how well the motor has been taken car of and the tune. You will be fine.