displacement

[:stuntstere:]

I was wondering how much you could bore out a sleeved b18c1 engine and still maintain a strong cylinder wall for boost and also how much could you stroke it and have no clearance problems. Thanks for your input.

 

[ahedau]

shoot for 84.5mm bore.

You can go more if you didn't boost it but 84.5 with boost is ideal.

 

[beerbongskickass]

I wouldn't bore it out that much. Leave a little room so you can do a few rebuilds.

 

[phunky.buddha]

I'd go ahead and run an 84.5mm bore. If you're not too great at engine building and you're worried about rebuilds, you might want to go for 83mm, maybe 84mm. I would boost up to 85mm bore, and starting at 84mm gives you 2 rebuilds left in the sleeve- 83mm gives you 4 rebuilds. Don't increase your stroke unless you want to add on a deck plate. Sure, you could run higher pin pistons, but you generally want a good amount of material in the piston crown on a high power boosted application- and raised pin pistons tend to be thinner up top and have weaker ring lands.

 

[posol]

screw stroke.

use your boost.

you can EASILY hit 700 whp on a STOCK dimension (stock 81mm bore, stock stroke) with the proper build up, turbo setup, and fuel management.

 

[:stuntstere:]

Thanks for the information. You guys have been a lot of help.