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Old 07-19-2010, 09:44 PM   #12  
Lee Stewart
Muscle Cars Forever!
 
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Join Date: Jan 2007
Location: Albuquerque, NM
Posts: 46,319
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Originally Posted by Lee Stewart View Post
What was the highest compression used in a factory built high performance engine? (one that was installed in a vehicle)
The 1962 Dodge Max Wedge 413 (420HP) and the 1963 Max Wedge 426 (425 HP). Both used a compression ratio of 13.5 to 1.

The ZL1 and L88 427s used 12.5 to 1
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