b18b head on b20 block

[popeye]

I have a B20b in my 89 CRX. I am converting it to obd1 running the b18b obd1 ecu.I dont have the money for vtec so i was wandering if i put a b18b head on the b20 block if it would raze the compression and would be able to rev to 7200 on the stock bottom end

[Nikku]

I have a B20b in my 89 CRX. I am converting it to obd1 running the b18b obd1 ecu.I dont have the money for vtec so i was wandering if i put a b18b head on the b20 block if it would raze the compression and would be able to rev to 7200 on the stock bottom end

it would not raise the compression, however the B18B head flows better then the B20 head and would have better flow (obviously) at the higher RPM speeds

[r_senik]

are you planning to boost? with your swap youll get more power if your boosting.the ls head will do you good.

[C.R.X]

just a thought; those b20 are infamous for their thin bearings. I recommend you upgrade them soon. or if not, just don't run it over 6krpm.

[Punkracer]

[quote="C.R.X"]just a thought]

i agree upgradeing the bearings and i recomend ARP rod studs too, from experance with b20 / b18a/b i say use ACL bearings . all the crank and rod journals on the crank are the same the GSR and B16 bearings are a lil looser than the LS/b20. they're still with in spec @ about .025 on the platigage but the GSR/B16 will allow better oil flow within the bearing surface cause less wear and higher reliablity than a stock ls bearing.

you can get the bearings @http://www.kteller.com or http://camp1320.com/main.html

good luck in your build

[bklyneg]

well i hope you checked the head stamp because the early b20b's came with p75 head. as we all know are b18b heads.