sleeving bore

[redblackfan]

will if i make a 81mm bore 84mm how will the head fit

[bpoweredhatch]

i got a 84.5 ls vtec head fits perfect

[redblackfan]

ok i mean like the combustion chamber will be smaller than the cylinder right

[Barefoot]

ok i mean like the combustion chamber will be smaller than the cylinder rightcorrect

[Z0_o6]

the combustion chamber will be smaller than the bore, however it won't hurt anything. just get a headgasket that is the correct bore size and you will be good to go. are you planning on having the block sleeved to go to the 84mm bore?

[B18c1Turboed]

I hope your block is sleeved!!!

[bpoweredhatch]

x2

[Z0_o6]

I hope your block is sleeved!!!

well, if it's gonna be all-motor it isn't AS necessary, but for any boost I wouldn't dare run a B20 without sleeving it.

[redblackfan]

I plan on resleeving it to 84mm and running a turbo maybe 15 psi becuase it is stronger
B18C1

[redblackfan]

the combustion chamber will be smaller than the bore, however it won't hurt anything. just get a headgasket that is the correct bore size and you will be good to go. are you planning on having the block sleeved to go to the 84mm bore?

the valve relief on the new bigger pistion more inside right

[Z0_o6]

the valve relief on the new bigger pistion more inside right

i can't decipher this.

[redblackfan]

those dents in the pistion will still be there

[Z0_o6]

the "dents" in the piston are called valve reliefs, they are there to keep the valves from hitting the piston during the exhaust and intake strokes. they will still be in the correct position most likely, however on any engine build where you are concerned with valve to piston clearance i suggest claying the motor and measuring to be certain.