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>From: "Eric M. Edmonds" <eedmonds@swcp.com> >I recently rebuilt the engine that came in my 71 fastback. It is 1584cc and I >set the deck height so as to have 6.9:1 compression. Later I read that this >was unnecessary as the fi system will correctly read the engine parameters and >compenate for any higher temps that would normally be found in carburated car >using a cr of 7.7:1 (or so). > >Will running the engine set at 6.9:1 cr damage the fi system or the engine >itself? If so I will pull the engine and remove the spacers I have under the >jugs (0.060). The FI can sense temperature, but it can't sense knock. Berg mentions a "knock sensor" on the FI Type IIIs, but that much, however, is wrong. I believe his basic premise that reduced CR is a good idea for today's gas is sound. So how does your engine run? Someone who knows more about carbs will have to answer your carb question. Jim --------------------------------------------------------------------- Melissa Kepner Jim Adney jadney@vwtype3.org jadney@vwtype3.org Laura Kepner-Adney Madison, Wisconsin ---------------------------------------------------------------------