I have a b18c1 head that is stock no head work and a bare b18c1 block. I want to build an all motor 2 liter vtec monster but am not sure if i should go with a b20 block or just bore my gsr block out to 85 mm? The b20 block is 84mm with a 89mm stroke 1973cc. the b18c1 block is 81mm with a 87.2 mm stroke. I was wondering what the diffrence is and would it just be better for me to get the blcok bored out to 85 mm and could i change the stroke bore also? I need alot of help on deciding where to start please help.

 

whats your hp expectations? how much is your budget? i think i read that the b20 sleeves are pretty weak. this would be better posted in the all motor forum

 

Well either way I'd say you should sleeve it so its not gonna be a budget/cheap build.

 

you said bore the gsr to 85mm . i hope you know it has to be sleeved. to have that size.

 

Isn't THIS the all motor forum?