COMPRESSION QUESTION

Old 10-30-2010, 06:16 AM
  #1  
JEFF69Z28
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Default 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.
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Old 10-30-2010, 06:48 AM
  #2  
mytmouz
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Depends on other factors such as deck height, etc., but somewhere in the 10:6 to 11:0 range I would say...
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Old 10-30-2010, 10:47 AM
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Tod74
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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
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Old 10-30-2010, 01:07 PM
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zipper06
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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

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