A
Anonymous
Guest
Something just dawned on me today.
When I had my '73 250 head milled for my 65 block, they milled it to 53cc's (this was less than I asked them for, BTW). They told me that it was milled an additional .25 for gasket, but I don't believe them. I'm just assuming they went to 53cc's.
Anyway, when they pulled my old head off the bottom end had already been rebuilt with .40 over pistons.
Do those pistons increase or decrease my compression?
Assuming that everything else is on the block is the same as stock, what inputs shoud I use on the compression calculator?
Thanks!
When I had my '73 250 head milled for my 65 block, they milled it to 53cc's (this was less than I asked them for, BTW). They told me that it was milled an additional .25 for gasket, but I don't believe them. I'm just assuming they went to 53cc's.
Anyway, when they pulled my old head off the bottom end had already been rebuilt with .40 over pistons.
Do those pistons increase or decrease my compression?
Assuming that everything else is on the block is the same as stock, what inputs shoud I use on the compression calculator?
Thanks!