The compression spec for the ABA is 10:1. I used a mls head gasket with two extra .009” outer shims so I’m thinking I’ve lowered it maybe a point. I have to use Chevron 94 octane to avoid detonation which I don’t mind as it’s a seasonal vehicle.
But when I checked with the timing light the full advance was 40* @ over 3000 rpm.
It’s just a stock 1.8 cis distributor. I guess I’ll try and recurve it with lighter springs and limit the advance
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