jcxcrxsi

b20b to be put my crx. i am buying racing sleeves that are 81mm now, can be bored to 84 no prob, but how much could i bore the iron sleeves out to, if only doing 12-13:1 comp ratio? i want to know if 85 is the peak or if 85.5, or possibly 86mm is? totally NA now maybe a 75 shot later later. im not sure how far i can push it w/o blowing it. help honda helpers, help!!

sherwood

the b20 already has alot of torque for a rex, i'd just leave it at 84, but i'm not sure how far you could go.

also wouldn't you need a major port job to feed a larger engine, the b20 head is prolly the most restrictive b-series head stock, let alone without the extra displacement.

sherwood

holy crap,i didnt notice.. nitrous on 12-13 comp ratio.. what do you mean only going with, your crazy to try and use nitrous at those level boy... just CRAZY.

..but it's your car, you mess with it.

i myself am getting a bored out b18c when i get my rex, b20/vtec without the problems of acutally being a b20/vtec

Kai

With good replacement sleeves, you'll max out around 87mm.

I'd start with an 84-85mm bore though, to leave you room to overbore in the future.

1stGenCRXer

Nitrous loves high compression.

jcxcrxsi

max out at 87mm....where in sam-hell can you find 87mm sleeves nevermind pistons. and how the f*$k would you fit a b16's 81mm bore comb chamber to a 87mm piston....im confused.

let me know where to go for the sleeves of that size, or 85mm etc.

thank yo
John

Kai

Sleeves don't really come in sizes, you have to bore them out to the size you want.Special order.

FYI, the Crower 2.2l B-series stroker kits rely on an 87mm bore and a 92mm (2.19l) or 95mm (2.26l) stroke. The pistons are designed with 81mm combustion chambers in mind.