Safe Compression for b18c2 block

[joe.teg]

Hey guys,

im just in the middle of a build and tossing up between doing an 11.8:1 comp b20 or doing a 12.5:1 comp b18 but retaining my b18c2 block. Is 12.5:1 comp safe to run with the standard sleeves or must the engine be sleeved?

Thanks
Joe

[TODA AU]

12.5 is ok with cams to suit. The sleeves are limited by bore size, not compression.
The B18C overbore limit is 82.00mm, after that you'd need sleeves.

[joe.teg]

so if i was to bore it to 82mm it would still be safe to run 12.5 comp?

[TODA AU]

Yes, depending on cam choice.
NB: You cant use a factory head gasket @ 82.00mm

[joe.teg]

Yes, depending on cam choice.
NB: You cant use a factory head gasket @ 82.00mm

What would you recommend camshaft wise. Are your C cams too high lift? Also, can you point me in the right direction as to what is "Safe" Piston to valve clearence?

Thanks

[TODA AU]

What would you recommend camshaft wise. Are your C cams too high lift? Also, can you point me in the right direction as to what is "Safe" Piston to valve clearence?

Thanks

TODA C's would be a good choice with zero clearence problems when installed correctly. ;)

[joe.teg]

thanks a lot adrian, youll be hearing from me soon :)

Joe