Originally Posted by PacificDude
Now, regarding option #2
Thanks to Snoopy for that link to the CR calculator. I've been playing with it a little bit and here are two setups I find appealing. B18A1 block, B16 head, GSR internals, and bored from 81mm to 85mm giving 1979cc of displacement. This yeilds(theoretically) an 11.14:1 CR. I increased the bore size to improve top end power and reducing the oversquare design: stroke larger than bore. Well, why not just go with the B20 block, B16 head, and GSR internals. By increasing the stock bore of 84mm to 88mm, keeping the 87.2mm stroke, and thus create a slightly undersquared design, the CR would be(theoretically) 11.79:1 and 2121cc of displacement.
the biggest bore you would want to go and still retain streetablity would be 84mm. it leaves room to overbore later if the cylinders are ever scuffed up. i dont even think 88mm with a b series would be possible. i've heard of 87mm with race only engines.
it would be a much better idea to just sleeve a b18 block.