Discussion in 'Engine Building' started by crazzy448&son, May 30, 2006.
will my b18a1 be able to bore to 84mm?
complex answer, what do you want to do?
you will have to resleeve if yo uwant to bore to 84mm.
you CANT bore to 84 on stock sleeves
and even with sleeves, definitely isnt recommended to go that high.
you're joking right? 84mm is a very standard bore with aftermarket sleeves. its probably the most popular. you can go a lot bigger, im running 86mm, ive seen 87 on some n/a applications. displacment=good.
86 is getting up there on some sleeves. i guess it realy just depends on the what kind of sleeves they are. maybe some race only engines are at 87 but i havent personally seen any, not on a B series anyway. at that point, the space between the cylinders get REAL thin and strength becoms and issue again.
but yea 84 is a standard bore for a sleeved engine.
If you have closed deck sleeves, 87mm is not an issue. 84 is standard, because you can get offshelf pistons. you'd have to special order 87s along with the proper hg, but that isn't a big deal. I'd worry more about having to deal with the bore of the combustion chamber - I'd probably bore the chambers to match the cylinder bore. Maybe it's less of a problem than I am thinking though.
my bad, i thought the bs were restricted to 84...dunno why...looked it up and im definitely wrong...teach me to read and not talk.
That's why it's called rumor or hearsay....
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