JWL wrote:
Quote:

Ken P wrote:
Thanks Owen!

On my compression. I was thinking about it last night, and it seems too high. Factory spec is 118 psi for the high compression head. My compression ratio appears to be about 7.8:1, vs 7.0:1.

This explains a few things. It seems like the car runs a bit hot, especially under load, and I thought I've heard light pinging a few times while pulling a hill, especially if lugging the engine a little bit.

Factory timing for the HC head is 4 degrees BTDC. I think I may try to retard it a degree or too and see how it runs.

Any thoughts?

Higher than normal compression test results may be the sign of an accumulation of carbon in the combustion chambers and tops of the pistons. This condition will also lead to pre-ignition as the carbon continues to stay hot. JWL