Ok guys i need some help...i have a b20 stock bore block,with cp 12.5.1 compression pistons, ls knife edged crank,eagle rods,block guard,acl bearings,and arp head studs....i am wondering whether or not to build a b16 head or to buy one already built off of a website...i am hoping for at least 230hp all motor...and im planning on running e85 and spraying with maybe a 100-175 shot [not quite sure yet] aswell....I have heard stock head with skunk 2 pro 2's,ferra/rev hard valve train would be enough support to get to that number on motor...idk if thats tru or not....lmk what you think...

 

I think 12:5:1 might be a little high for E85

 

12.5.1 needs 93 octane no lower

 

If you haven't got your cylinder head yet I would wait until you do so you can really know the compression as which head you get will affect that. If you are aiming for 12.5:1 we run 92 octane here in Washington with no problems. All your power is going to be in the head, so what you decide on is very important. 1 - Good flowing head 2- cams that are designed to work in the flow range of your head 3- Intake manifold that will flow what the head and the cams want. 4- Good header. Fairly easy to figure out if you really think about it.

 

Thanks for the help guys