i have a b18b thats no longer good block wise. my question is if i can get a b20 block from a crv and put my b18b head on it and use my original wiring harness with the b20 block and my ecu. is it plug and play? will it work? i have a 94 integra ls, head, wiring harness, and ecu.

 

Yes it will work.

It will also bump up the compression.

 

i just want to be sure. thanks. so the block will work even though it comes from an obd2 vehicle into my obd1 and using my ecu?

 

Yeah it will work fine. Your obd1 harness should drop right onto it.

 

cool. how will this hybrid increase compression though? both the b18 and b20 have the same 9.2:1 compression right? it also seems that the b20 makes less power and has a lower redline of almost a 1500 rpm difference. whats the deal?

 

yea it works wonders, i have the b20 block with the gsr head and tran in my integ

 

He's not using a vtec head..right?

Look up the combustion chamber volume for the heads or use the c-speed compression calculator to determine your CR. The LS and b20 blocks are practically identical besides the bore, so I don't know why the redline would be different. I built a b20vtec that revs to 8k and I had no problems.