Im sure alot of people already ask this question but bare with me.
Im trying to piece together my lsvtec build up.
i want my compression ratio to be around 10.5 - 11.0 only runing 91 octane gas.
what OEM piston should i go with?
as of now im thinkin USDM ITR piston P73. but i heard it might not fit easly on the ls rods?...

are are 99-2000 SI piston part #? is it PR3 or P30?

im going with a 95 b18b bottom with 98 gsr vtec head.
keepin it OBD1... pretty much stock daily driven. hoping to make 175 -180hp.

another question is what the different between CTR piston and P30 piston? when i look a some website they said they sale CTR piston or P30 piston and it kinda confuse me which is which?
alright thats all i hope u guys could help me out. thanks for ur time.

 

Check out my post I made a while back

https://honda-tech.com/zerothread?id=1257816

use this site to calculate your compression
http://www.zealautowerks.com/

P73 should work on LS rods.

PR3 are USDM B16A pistons while P30 are the JDM B16A pistons which give off a bit more compression

CTR pistons are much more dome like and give off a higher compression then p30. If you want to be at 10.5-11:1 then I would go with the p30 pistons.

 

If you want 11:1 comp with a gsr head, go with us itr pistons. pr3's and p30's will set you at about ~11.6-11.9

PCT is the CTR piston, you probably dont wanna use this with 91 oct.

search you should be able to find answers to all of your questions pretty easily