Hey, quick question. I was wondering if you can use the JDM P30 (B16A SiR2) Pistons in an LSVTEC motor. I know you can use PCT(CTR) or P73(ITR) in the LSVTEC...anyone with this knowledge, please help me out.

 

Sure, they are the same bore, and the valve reliefs will be ok. The rods should fit, but some minor machine work may be needed.

 

p30 pistons will go in no problem. just have them pressed onto your ls rods. good choice of piston too for lsvtec. about 11.2:1 compression.

The Type R pistons will work too, but the rod ends where the piston sets will need to be shaved 1mm on both sides.

 

how about just pr3(b16a) pistons into a ls/vtec(b18b w/ pr3 b18a head). What is the compression ratio of that. I use the stock ls rods right, just have them pressed as well? thanks guys

 

http://www.c-speedracing.com/howto/c.../compcalc.html

 

The P30, PR3, etc. pistons will work, but you'll need to machine the rods slightly as they are just slightly too wide. Nothing major.