lowering compression with baseplate spacer?

just wondering if im doing this right. i plugged in some values into a compression ratio caculator till i got what i believe to be correct values for my setup, then i added gasket thickness till i reached my desired compression ratio.
650/750 bored to 69mm(810cc wiseco pistons) 650 head (combustion chamber 23.7cc IIRC) 10.25:1 compression ratio pistons when used with a 750 head, and roughly 10.8:1 compression ratio with a 650 head. with a 2.25mm spacer it puts the compression ratio around 8:1 if i did this right.
opinions???
thx!
(cant get the turbo idea out of my head:evil: :whistle: )

not that this is the best idea, but I have seen people put two gaskets on before and it worked, didnt leak

yes i was thinking of doubling up on base and head gaskets, but i wasnt sure if it would be enough(need to measure i guess). maybe a few base gaskets would be OK. i would feel safer with less areas to leak though. so a thick baseplate spacer would make me feel better than 7(guessing) base gaskets

did you do a cc on the head and on the piston, that is the only way to see exactly where you are

no, i was going by wiseco and manual specs

Your numbers sound about right, a 2mm base spacer is common. Don't forget to figure in adjustable cam sprockets if you go this route.

lorcan is right on, I forgot about the cam chain, dumb me, I have done some creative things on racing small blocks and cam chain issues have come up before.
if you stay in the path that you are going a degree wheel and dial indicator will be needed to put the cams back in time, good thing is you can move them around to gain some power

thx guys. I wanted to stay away from degreeing cams, but i know i will have to if i go with a spacer. what a learning curve this is turning out to be! :woohoo: I have read about degreeing cams, and it looks a little tricky, but im sure i could do it with the step by step instructions
if a 2mm spacer is common, i wont worry about not having enough length in the cam chain:)

Lorc, where would i find a spacer? and would i use a gasket on both sides?