Wiseco 9:1 b16 pistons in b18c what is the compression ratio going to be

 

Probably around 9.8, just a guess.

 

compare the part number piston that you have to the catalog sheet that Wiseco uses. they typically use the same part number, in the columns next to the description it shows what the compression ratio would be. Compare the B16 and B18C and you have your answer. so for example, if you have K542M815 for b16 from the catalog, it gives you 8.8-9.0:1 CR. Find that part number above in the integra 94-01 portion, and your CR for that same part number is 9.7:1-10.2:1.

Here's the catalog for your reference
http://www.wiseco.com/PDFs/Catalogs/SC07/AcuraHonda.pdf

 

i was going to do b16 in the b18b ls block but i want to boost it wouls i just use b18 pistons with low cr or same b16 low cr??

 

9.9 : 1
calculated via http://www.zealautowerks.com/bseries.html

 

When you calculate the added stroke and slightly smaller combustion chambers of the B18c1 head, you will go from a 9:1 rating in a b16a, up to 10.2-10.5:1.