Today I called Hondamotorsoline looking for a b20z. he said he did not have b20z's in stock so I asked him some questions about the JDM B20b (which he has instock). I asked him about the compression of the of the JDM B20b, he said it had a 9.6.1 CR. He also added that the JDM B20z has a 10.1 CR.
I was always under the impression that the B20b had 8.8:1 and that the B20z had 9.6:1.

Is the info from http://www.hondamotorsonline.com correct?

 

Anyone?

 

Not sure about the b20z since i cant find any documents on it.
But I am sure the b20b in japan is 9.6

 

Thank you! I have been searching through the pages and pages on the b20 in the archives but could not find a solid answer.

sgT, maybe you can help me figure out my compression too! I don't know the proper way to figure out my compression (mathmaticly) so I always use the Compression calculator on C-speeds site(does this produce correct results?).

It would be relativly simple if my head were not milled. Its milled .020, do you know how to figure out the size of my b16(42.7 cc) cumbustion chamber? I read on h-t that .007 taken off the head accounts for 1 cc. is this correct? Than means my head would be ~39.84 cc's. Does this sound correct?

 

sounds about right.

 

hmmm, my B20B is supposed to be JDM but has p3f pistons - it is a 1996 CRV engine...

i think only the 98+ JDM B20B's were 9.6:1

HTH,

t..

 

using the c-speed calc i simply subtracted my milled amount 0.04(1mm) from the head gasket thickness to give a negative number.

this yeilds 9.9:1 CR with B20B (p3f) and B16A head...

HTH,

t..