View Full Version : COMPRESSION QUESTION
JEFF69Z28
10-30-2010, 05:16 AM
CAN I GET A GUESS AT WHAT COMPRESSION I HAVE IN MY 406.
FLAT TOP PISTONS WITH 2 VALVE RELIEFS,STOCK BLOCK 4340 CRANK 6"HBEAM RODS,64CC AFR HEADS.WOULD MORE COMPRESSION MAKE MORE HP AND ABOUT HOW MUCH MORE.
mytmouz
10-30-2010, 05:48 AM
Depends on other factors such as deck height, etc., but somewhere in the 10:6 to 11:0 range I would say...
Tod74
10-30-2010, 09:47 AM
Depends on other factors such as deck height, etc., but somewhere in the 10:6 to 11:0 range I would say...
agree
zipper06
10-30-2010, 12:07 PM
Useing the wallace calculator, with a .041 head gasket and a "0" deck height, with 6cc valve reliefs which is common for eyebrow pistons it comes to.
Your displacement is 406.77 CID
The Compression Ratio is: 11.53
course there are lot's of factors to change this as mentioned in the earlier posts, such as deck heigth, difference valve reliefs and different gasket thickness.
JMO
Zip.