i'm looking into buying a set of pistons for my ls turbo. what I wanted to know is, would it make a difference in torque at the same horsepower between 9:1 compression ratio versus a 8:1 copmression ratio? would one have more torque than the other or will it be the same? or if someone could post a link to some good info, that would be cool

 

9:1 is going to make more power throughout the RPM range. I used to be a fan of low compression but after driving my car which is spineless out of boost I think the next time I built a motor I would go at least 9.5:1

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nonvtecD &raquo;</TD></TR><TR><TD CLASS="quote">9:1 is going to make more power throughout the RPM range. I used to be a fan of low compression but after driving my car which is spineless out of boost I think the next time I built a motor I would go at least 9.5:1</TD></TR></TABLE>

You can <u>really</u> notice the difference between 9:1 and 9.5:1 on the street, too

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boosted92 &raquo;</TD></TR><TR><TD CLASS="quote">

You can <u>really</u> notice the difference between 9:1 and 9.5:1 on the street, too </TD></TR></TABLE>

so is this at the same horsepower level?

 

With all things the same compression won't move your torque...just the rod angle.

 

The underlined/italics were trying to convey my sarcasm

I've had a 9:1, 9.3:1, 9.5:1, and 10:1 turbo setup, and the spool and off boost power was basically the same across the board, given the same bore size.

Stick with a 9:1 SCR, and focus more on the right turbocharger and cylinder head components to make the most torque. An LS @ 11:1 compression with a VictorX intake and a T3/T67 is obviously going to get shitkicked in the mid range compared to an 8:1 compression motor with a skunk2 intake and a .48 A/R SC34.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boosted92 &raquo;</TD></TR><TR><TD CLASS="quote">The underlined/italics were trying to convey my sarcasm
</TD></TR></TABLE>

I know you were, I was agreeing/re-iteratting (spelling is totally wrong )

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ramennoodles &raquo;</TD></TR><TR><TD CLASS="quote">i'm looking into buying a set of pistons for my ls turbo. what I wanted to know is, would it make a difference in torque at the same horsepower between 9:1 compression ratio versus a 8:1 copmression ratio? would one have more torque than the other or will it be the same? or if someone could post a link to some good info, that would be cool</TD></TR></TABLE>

Ideally it will increase your torque across the board...and unless you turn down the boost or decrease your redline, the horsepower will increase, too.