Rossko85

iTrader: (11)

Just wondering what this is...I know it can vary from build to build depending on all types of things....but, just wanting an avg...

I figured mine up, and tell me if im doing this right...

took my baseline of 230 and subtracted it from my boosted max whp of 385 and got 155whp as my overall increase....then took that and divided by 8.14 for 8.14psi that was confirmed on the dyno which give me 19.04..or in simplest form: 19whp:1psi ratio....

does this sound right...? im a 10.0:1 CR 243 heads and 325ci

black98ws6ta

iTrader: (77)

How you got your math is perfectly fine, but usually turbo's are more efficient at different boost levels. It may pick up 19 hp per psi there and 25 hp per psi around 15 psi. Past the efficiency there are tons of variables that make it impossible to get an "average".

jay_rich

iTrader: (8)

on My LT1 I picked up 22whp per psi

410RWHP N/A, 583WHP on 8psi

Jay

98Z28CobraKiller

iTrader: (17)

Also the math will only work on your setup because 15 psi on a motor that eats 100 lb/min of air is different than 15 psi on a motor that is eating 80 lb/min of air. Obviously the motor that consumes more air will make more power per psi. The amount of air consumed depends on tb, intake, heads, cam, compression, etc. Lots of variables.

Jordan_NationalSpeed

^ Exactly.

It's all relative to overall design, engine specifications, conditions, tuning and most of all; turbocharger volumetric efficiency.

A GT3582R producing 20psi on a 350ci engine will not be nearly as effective as a GT4202R producing 20psi. Once again, it's all relative. A battle of design and EMAP versus IMAP.

Rossko85

iTrader: (11)

that def clears some things up...those are those variables I was speaking of as I knew there were some LOL...

Thanks guys!

ls1290

iTrader: (20)

True, but environmental conditions play just as big of a part. The exact same setup will produce different rwhp at sea compared to 5800'.

Though there are many companies that will claim some average number gain, there are way too many variables for the numbers to have any meaning.

Bird-Of-Prey

iTrader: (23)

Just like you would give a customer a ballpark figure on what it will take to fix their car without actually having it there to diagnose it. You can count on anywhere between 20 -25hp per psi. Only as a given rule of thumb to go by. Too many variables in all the different set ups to account for to be accurate.

buick_lsx

My car just got dyno'd yesterday, picked up 20rwhp per pound of boost.

Basically stock lq9, only has a cam, which is exact specs of a 2003 ls6 cam but on a 112 center....s475 turbo

Jordan_NationalSpeed

Very true, but at either sea level or 5,800ft elevation, the turbocharger will still be out of efficiency. I would consider turbocharger efficiency the largest deciding factory from environment to environment.

Just my opinion, I'm not arguing with you at all, because your statement was obviously correct and logical.

Agreed.