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View Full Version : guess the compression on these pistions on BBF



barefootin
01-14-2014, 05:18 PM
bored 30 over w/mild head mods (dove c) and crower cam w/edlebrock performer 460 manf. and 800 holley...

what else do you need to guessitmate...

hoping for 9 or 10 to 1...

dammmmmm...dont know how to reduce the size of pic so look at it here...its the piston pic...

http://www.flickr.com/photos/38845381@N02/

dragracerdave
01-14-2014, 07:12 PM
I use Diamond pistons in my race stuff, and here is what I use from there ssite to figure out my engines...there are many others, I just prefer this one....

http://www.diamondracing.net/tools/ you should be able to get it close with the right information...:smile:

429CV23
01-14-2014, 07:24 PM
D0VE-C's are ~72cc heads. With the dishes, you should be in the 9-9.5:1 range, assuming it's zero-decked.

Redeye1620
01-15-2014, 08:30 AM
http://www.summitracing.com/expertadviceandnews/calcsandtools/compression-calculator

Here is a simpler calculator from Summit Racing. Don't know how accurate it is compares to the Diamond calculator....-Rich

barefootin
01-15-2014, 10:42 AM
the heads were milled .010...and it was bored 30 over...not sure of the other calculations so cant use those formulas you suggested...

just trying to get a rough idea of the possible compression given those pistons...i think a stock 460 in 71'-73 were around 8.5-1

so i think 429cv23 is in the ballpark...