Is there an average hp gain per pound of boost overstock?

[Seymour222]

Just curious, how many WHP gains do most people get from turbo setups, per pound of boost applied? I totally understand if this is a loaded question with far too many variables to consider? I was just wondering if anyone had some type of idea. If my poorly calculated calcuations are correct I received 17.78whp\1lb of boost. Fuel my novice mind!

[D16Civic]

i think the norm is around 8-10 whp per lb of boost from what ive heard and seen, at least on something like a T3 anyways. But thats just on a Honda.

[1439/2000]

oh my god.

it depends on the size of the motor and turbo and their relationship.

[-S Double C-]

no b16 and gsr's gain almost 15whp from every pound of boost b/c of the high compression

[Vteckidd]

On an average HONDA motor with a basic setup it is around 8-12whp. I have about 40 different cars with dynos to show. On a very well designed setup you can get 15-20whp per pound. This means good flowing heads, big exhaust, effecient turbos, etc. There are many things that can make this go up or down. Examples, Stock GSR at 9psi made 42whp more by just changing from 2.5in exhaust to 3in exhaust and downpipe. This added about 4whp more for each pound of boost. Another example, we did a D16y8 with a T25 turbo and a small 2.25in dp. Car also had stock cat, stock exhaust w/aftermarket muffler. Stock it made 105whp, 9psi boost it made 178whp. This is right at 8whp per pound.

Cliff notes, mainly depends on eff. of setup.

Charles (not Mike)

[scttydb411]

i think the norm is around 8-10 whp per lb of boost from what ive heard and seen, at least on something like a T3 anyways. But thats just on a Honda.

this is what i usually say...anything above that is icing on the cake from bone stock. certainly setups can be done to get 10-15/lb, but not the norm on stock honda engines.

a lot of variables come into play:
compression
size/flow of turbo
boost
fuel used
timing
flow into/out of engine

17+/lb of boost is great! what's the setup??

[BTEC]

scotty is right, u wnt get the same whp gain out of a t3 as a t4 bc the cfm (air flow) is different. the size of the turbo determines how much the air ehats up when compressed too which determines hp also. as well as all the other variables he listed

[Vuongy_Dong]

i calculated mine. I get about 11-13 hp per psi.

[i4_garage]

i calculated mine. I get about 11-13 hp per psi.

wow...congrates....good to know u are using that peanut size brain.... ,,,,

[sebastianHoff]

the sr20 averages about 10hp per psi of boost, with no other supporting mods. cams, adjusting timing, and tuning change that. at 28psi the sr20 has made way over 500whp.

[93H22ACX]

too many variables... but mine makes an average of 16-17whp per psi. this is all stock rebuild specs....

peter's is about 19-20whp with alot of mods that include p&p head and all... every engine is different so it will range from 5-20+whp lol

[4dmin]

bahhh this is funny my dub would be like 5-7whp / 9-11lbs per 1lb woo hoo...