Hey guys i need to know if pr4 pistons are different than p72 pistons
or are they the same, I have heard both so i'm trying to figure it out
thanks any help is appreciated.

 

different, one is dished, one is domed

 

pr4 pistons have zero dome compared to p72's

 

only a blind man with no hands can tell you there the same ;x

 

so if i threw some p72's in my ls would it bump up my compression
because i have 4 p72's layin in the garage

 

yes.

 

How much power do you think i can gain ( is it worth the labor/time)

 

who knows, but you can go here and find out your c/r.

http://www.zealautowerks.com/

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 91turboteg &raquo;</TD></TR><TR><TD CLASS="quote">How much power do you think i can gain ( is it worth the labor/time)</TD></TR></TABLE>

Not worth the labor/time. Do it if they're in better condition and you're already doing a rebuild.