Hi, in the Honda parts catalog for OEM piston. They have piston set A, set B, and OS. I know the OS is the oversize but what's the difference between piston set A and set B? How do you know which piston set that will fit into your engine? Thanks.

 

its stamped on your block, like BAAA

2 factory sizes, all preludes have different combinations of pistons.

size B is smaller of the two

 

Where can I find the stamped? Is it near the H22A stamped?

 

bottom right corner of pic...

 

**** u sam...... help me buy some sleeves....

 

maybe i will..... when i win the SC lottery

 

So does it matter if I use A or B if I want to do an oversize for my block? The A and B is only available for the standard size piston, isn't it? Not for the OS piston?

 

no, A and B are not used for oversized, but if your pistons are already A, then it is pointless to bore over, b/c you will only be going larger by .005mm

 

sorry but i just want to make this clear, so if its stamped BAAA then buy SET A? and if its BBBB then buy SET B?

 

Well if you don't want to do a hone, just match the exact combination of "B" and "A" pistons that it came with. That's what I did on my H22A1 when we swapped in Type-S pistons.

 

How was your taper and P2W? I've heard FRM cylinders are pretty notorious for going out of round with any amount mileage.

Jeremy, as Mike said, you would buy one "B" piston and 3 "A" pistons; they are usually sold individually, not as a set from the dealer. The piston "set" in the catalog I believe refers to a single piston & rings, and possibly wrist pin and clips.

 

well on the catalog it says QTY 4 on each set but any way my block is stamped BBBB i just wanted to make sure and you guys helped me out alot thanks for making this alot more clear to me

 

only thing that confuses me now is weither they sell them in a set or in singles? because it says set?