sailman

thanks, that site has a lot of good info as well!

okay, i found local a b18 head a b20 head, a b20 crank and some b18 cams.... i know the b18 and b20 heads are similar but are they identical and interchangable? also I probably wont use the b20 crank due to the longer stroke...

Jcushing

b20 stroke: 89mm
b18a/b: 89mm
b18c: 87.2
b17a: 81.4
b16a: 77.4

as far as heads, non btec b18/b20 are all the same if they have the p75 casting, only b20 head that is different is the p8r and thats not compatible with 81mm blocks.

as far as the cams use either b18b or b20z cams, they are the biggest non vtec cams

honestly i dont think many people worry about r/s ratio when it comes to turbos and i dont think you should either. i wouldnt look to re-invent the wheel here, no disrespect to you helper but ask people that build hondas for help with hondas. only reason to look into r/s ratio is for NA IMHO were you care less about low end and more about making every pony you can near redline. and your also lookin to rev as high as you can.

take a b18b block, skunk2/itr style intake manifold, some crower turbo cams and valvesprings, get a good port job (notice i didnt say "and polish") and throw in some fresh bearings, and a set of forged off the shelf pistons and eagle rods. rev the bitch to 8k with a gsr tranny and call it a day. its a simple and a well proven setup.

boost_guy

Your math is a little off. That would give you a 1.56 rod ratio. I read somewhere about somebody using a B20 block, B17 crank,GSR rods and custom pistons. That would give you your 1.8 liters and a 1.7 R/S ratio.