[20v] 7A vs 3B C/R

JShadzi at aol.com JShadzi at aol.com
Tue May 6 12:19:01 EDT 2003

This is not true, the compression he is referencing is the pistons, not the head, both the 3B and 7A have about 37cc combustion chambers.


>Hi guys-
>I was talking with a local guy who is said to know a lot about Audi tuning etc.  He said that putting a 7A head on a 3B bottom would have a higher compression ratio compared to normal 3B.  He said it would increase from 9.3:1 to 10.3:1.  This was not my understanding.  Can anybody confirm or deny?  TIA-

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