i have a gsr block which im boosting. looking at new pistons. had eye on supertech pistons but could only find 10.0:1 for my gsr for 405 with rings. I seen wiesco have a 8.6-8.9:1 piston for about 480 with rings and shipping. cp have a 9.0:1 pitson with rings for about 580. which of the two are better or if the supertech is best overall. Ill be running about 20psi. Dont know what is the best piston. if it comes down to 100 bucks ill spend the money just need an educated opinion

 

9:1 vs 10:1 Compression

check that out.

 

only problem is with the diagram i cant tell which is the 9:1 cp cause it doesnt show. so did it make less power or more. not only that the diagram shows about 9psi opposed to 20psi. any opinion on that or suggestions

 

let the motor do the work go with flat toped pistons dont waste your money on Cp they are over priced..and is the block sleeved for 20Psi?

 

What fuel will you be running primarely? What cams, intake manifold, exhaust manifold and turbo?

 

right now i have a junk ebay turbo, but im planning on get the motor sleeved. i have eagle rods, ferrea valvetrain and valves, waiting on blox hsl cams, skunk 2 intake manifold, and a full 3inch stainless exhaust. Car will only be a weekend warrior or track car so what ever fuel i need to run

eventually i want to upgarde to a top mount mani with a gt35r or bigger

 

If its not a daily driver go for 10:1

 

The chart shows the 10:1 pistons making more power.

 

Id say cp because over all they are better and the higher compression will make more power also. Iv also heard that cp price has dropped a little

 

10.1 and c16 do it.