compession question?????

[hard-charger]

hi all! i bought a motor the other day for a back up. the fellow i got it from said it was just rebuilt, decked, line honed, balanced ect..... i took the heads off to give it a once over and saw it was super clean, but the pistons were sitting about a 16th of an inch in the hole. my question is;
does anybody have any idea about the compression ratio im looking at here? ive got some new heads for it w/ 84cc chambers.
thanks!

[firefighter3931]

Assuming that the pistons are .125 below deck the static compression will be low....inthe 8:1 range which is not ideal for any performance build. The aluminum heads need closer to 10-10.5:1 to get the most out of them. 



Ron

[hard-charger]

lol................sounds like my back up motor sux. lol
clean block tho. maybe it can be my new stroker project i wanted to get into, until i got consumed making the most of my current 446. which was very rewarding in the end. but ive gone as far as i can w/ it, and am happy the way it is.
as far as the new engine,.......its time to stroke it.   so many more questions to come. thenks every 1! this site is endless amounts of priceless knowlege

[hard-charger]

oh!  is this compression/engine a good rage for a bds supercharger?

[firefighter3931]

oh!  is this compression/engine a good rage for a bds supercharger?

Why yes....yes it is 



Ron

[hard-charger]

well in that case, woohoo!
now ive got more questions about supercharging. lol.
for a car that sees the street on the weekend. and the strip as much as possable. what is the best one to go with? and how should i set up the motor? like; camshaft, carbs, heads, boost, and brakes, and anything els important with a blower? thanks again!