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Erick Erick is offline
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Join Date: Nov 2002
Posts: 59
Originally posted by Steve@Rennsport

Detonation in 964's is caused by several things including:

1) Insufficent octane fuels

2) Improperly programmed chip (common)

3) Broken distributor drive belt

4) Excessive carbon buildups on pistons and combustion chambers. This raises affective CR as well as generates hot spots

5) Excessively lean fuel mixtures (poor chip)

I have seen problems with their chips when operated on West Coast gasolines and the outcomes are all identical to yours.
You've seen problems with Autothority chip on 92-93 octane West Coast gas? And I thought 92-93 was good! No? Well I'm taking that chip out then.

So how do I know what a good chip is, because I've heard that chipping these engines can make a decent power increases. Is there always a detonation cost? Should I only use chips that are burned to my particular engine on a dyno?
93 RS America
Old 08-20-2005, 12:03 AM
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