I acquired some cp pistons... not sure on the compression, but they are completely flat, not domed or dished.

Inside the piston is stamped 79-2

If anybody knows what the part number is for these pistons or what compression ratio (B16), I'd appreciate it

 

if they are flat tops... they are close to 10:1

i'm running wiseco's flat top pistons... they are 10:1

 

these are my 9.1 i just got

 

flat tops in a 1.8 motor will be around 10 to 1.. in a b16 they are around 9 to 1

 

^^^ thats what i gathered... thanks

 

I was worried about the same thing, and CP compensates for for the smaller combustion chamber of a vtec head. so the pistons i got are made for LS block with VTEC head to have a CR of 9.1, if i were to put an LS head in the block the CR would drop to around 8.1.