Generation IV Internal Engine - Need help on finding out CR on this motor




Wicked 1
08-02-2007, 02:49 PM
It is a 5.3 block bored to 5.7
stock 5.7 piston,rod,crank
heads are a 58.5 cc 241 milled
head gaskets are the fel-pro not the mls
I thinking 10.8 or 11.1
help me out
thanks Wicked 1


Randy WS6
08-02-2007, 06:25 PM
Try this
http://www.c5frc.com/calculators/Compression_Ratio_Calculator.htm

Wicked 1
08-03-2007, 08:05 AM
thanks randy ws6
IT IS 11.5 to 1
What will work for me


Randy WS6
08-03-2007, 08:33 AM
That sounds o.k., but you will haft to use 93 oct. fuel with that compression

Wicked 1
08-08-2007, 12:06 PM
With The Heads Being Milled That Far Do I Need To Run A 7.350 Pushrod ?