I am putting ctr pistons in my motor. I have heard that ctr pistons have a problem clearing with a gsr head. I was told that they can hit the valves. I have itr pistons now but am changing to raise the compression.If anyone can let me know about this clearance issue it will really help. Thank you.

 

just clay it if your worried

 

whats is the block that your using?

 

stick with the itr pistons if its a street car.

 

I ran CTR's in one of my old motors.

I ended up using a cometic .054" headgasket to lower the compression to pump gas numbers (around 12.5:1). This was using a non milled/decked head and block.

P30 pistons are prolly a better choice IMO.

 

CTR can be DD, but will definately need a Tune.... i have blown 2 LSvtec with CTR piston before...melted 2 pistons and broke several ring lands on each motor because of no tunning.... last one i build with CTR piston ran good cause i had it tuned... made 210whp and 141lbs. tq did 12.6 @ 109mph...but eventually i sold it!

 

i have over 25,000 miles on my daily-driven build with CTR pistons using 91 octane.

1) Clay the motor for p2v clearance
2) get a wideband o2 w/ air-fuel guage
3) tune that ****