Whipple 3.25 to 3.0 = HP?

[gx00850]

I know all things are variable but I'm just trying to get an idea. Those of you who have gone from a 15lbs of boost to 17lbs of boost on your whipple, how much HP was gained by the additional 2lbs?

I guess any upper/lower pulley combination here would be about the same as long as the total was 17psi.

Thanks,

 

[SVT03Chris]

17 - 34 RWHP maybe? Could be 35 + RWHP. It Really depends on many, many things like you said.

Also depends if you are going to run a higher octane, add timing, etc..

 

[gx00850]

Thanks, I want to keep it at 93 octane. I was wondering if it is worth the $400 for the retune and pulley. If I think I can get 30rwhp then I would definetely do it, but maybe not if I am only going to see 15-20.

 

[rtusnake]

Some people run 19psi on pump.

 

[cozmo2806]

I've heard the for every psi added is equal to 15 hp. So if you add 2 psi, thats around a 30 hp gain. Maybe someone else can chime in here.

 

[gx00850]

Some people run 19psi on pump.

Yea, but how safe is 19 psi on pump gas?

 

[SVT03Chris]

^ Not safe enough for me to run that much psi on pump.

I wouldn't go over 17psi on pump gas.

If you want to go to 19psi just throw in a little Torco or race gas and get it tuned like that.

 

[rtusnake]

Depends on who tunes your car

 

[Posi]

I'd say do it and see afterwards. Either way you're going to easily feel it in the sotp meter.

 

[Steve2050]

I'm thinking of changing over the stock 3.5" to a 3" so I'll definitely pick up hp.

 

[Posi]

^Your going to do more than that. You'll probably crap your pants afterwards.:lol1: