From stock to highly modified, what kind of hp would you expect from the following upgrades on an N/a engine:

lightened pulleys:

10:5:1 high compression pistons:

I know its kind of vauge and could be alot of answers it could be but just a roundabout.

 

your not a noob so u should know to search for questions like this

 

Pulleys - 1hp. Maybe 2. 3 if you're really lucky. (Yeah, I'm being serious).

Pistons - unknown. Only installer has not dynoed. And Engineerboy's buddy, who is supposed to have 10.5:1 pistons from "some other car, but won't tell which" dynoed and got 97hp. So it's up in the air. Boe estimates 15-20hp from the RRM pistons, but as I mentioned, we don't really know.

 

I read that a jump to 10.5:1 really wont push alot out....Its basically not enough to make decent gains from it. I'm afarid to say it but I think I'm going to have to search a honda forum for a round about figure.

 

I've heard 10.5:1 should be good.

But Buschur commented that his 10:1 probably wouldn't do much. Is that what you're thinking of?

 

I asked a performance guy and they said the same thing.

10:1 is not that much of a jump or a cost effective one they said.

WADAD

 

As posted before blacksheepdj says that a 10.5:1 piston would benifit. I just dont see how a .5 increase woul be that much more benificial.

 

Ask Boe. He has them installed in his Lancer...