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-   -   COMPRESSION QUESTION (https://www.racingjunk.com/forums/showthread.php?t=29121)

JEFF69Z28 10-30-2010 05:16 AM
COMPRESSION QUESTION
 
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
Originally Posted by mytmouz
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.


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