i just got me a jdm b16a sir2 with 30k and some mods. Wondering if i should keep my p30 pistons or is it worth getting ctr pistons. Will it improve much of anything or is it not much of an upgrade. Let me know if its worth the trouble doing all this. Also what valves,retainers, and springs do you guys recommend, skunk2???

 

anyone know something??

 

try the all motor forum mexican

 

i would just keep the same pistons if i was you. skrunk 2 has always been one of my fav. for head work go with them.

 

If you're willing to go through all the trouble of swapping the pistons out, it would be worth the extra bump in compression. But headwork is a way more important factor in making power. Good valvesprings, lightweight retainers and a good cam profile will net you more power on top of a port n' polish job. Shave those valve guides down and let those cylinders breathe. Then you can worry about internals. But the choice is yours. I would do headwork first. Skunk2, Buddy Club and Toda definately...

 

the added compression would be worth it if youre already tearing down the block
ask around in the all motor forum as well