Posted by chriscase on Thursday, November 08, 2007 at 11:14:33 :
In Reply to: compression ratio on 93 cummins? posted by DoDgEBoY - MaDe in the USA on Wednesday, November 07, 2007 at 23:19:06 :
Since 15# is one more atmosphere, doubling the pressure, I would think that 10:1 plus 15# would be 20:1?
I do know that hot cars used to only use 6:1 pistons, then a big boost only gave 12:1 CR. But since you are burning twice as much mix, you get close to double the power inspite of lowering the compression.
Follow Ups: