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

Todd Phenneger tquattroguy at yahoo.com
Wed May 7 00:56:07 EDT 2003

  You could theoretically swap heads with no change, but
swapping pistons will change the Comp Ratio.

--- JShadzi at aol.com wrote:
> 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.
> Javad
> >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-
> >
> >Brandon
> >
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