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Re: [T3] Compression Ratio Recommendations


<x-charset windows-1252>OK - I have received a pretty broad range of recommendations for my compression ratio.  Everything from Berg's 6.9:1 to an engine expert here at work with VW experience recommendation of 9.0:1.  I am planning to go with between 7.0 and 7.2 depending on what it works out given standard shim sizes.

On a related note, what tolerance can I run on the CR given my stock rebuild?  If standard shim thicknesses yield 7.1 on one bank and 7.2 on the other (remember my head chamber sizes vary by about 1 ml left and right), can I live with it?  What are the consequences?  Should I work the combustion chambers to get them closer in volume?  It is only a 1.5% change.  Should I worry about it?

Thanks for all the advice.

Later,
John Jaranson
'71 FI Auto Fasty (Jane)
'66 Square (Sophy)
About Half a Late Square (Organ Donor)
http://mywebpages.comcast.net/jaransonT3/jaransonT3/  (This is the new address for my website)



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