bout to do another buildup on my teggy, will be removing arias 9:1 pistons, want to go with cp pistons. according to their website the 9:8 and the 9:1 are both good for boost. ive had the arias for 7 years now, and didnt necessarily care for the somewhat slow throttle response. i know the 9:8 will help that, but my question is whould that be too much for 12 to 15 psi. someone help me choose cuz im ready to buy like yesterday.

 

anything between 9 and 10 will be fine. honestly if you feel the throttle response on a 9:1 is bad, the tune could have had another degree or 2 of timing put into it.

there is nothing wrong with the 9.8 cp's