Quote:
Originally Posted by JFairman
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My AFR gauge says I'm at 10:1 on decel with the decel valve working and vented to atmosphere and it said around 15:1 on decel when the decel valve is removed or disabled. A stock fuel head would be leaner on decel.
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It sounds like that valve must be flowing a surprising amount of air if it effects the AFR that much.
Very interesting about the difference intake vac with changes in CR. So higher compression motor suck more.
The higher compression also makes it easier to fire a lean mix and it should burn faster. Good for pre boost response.
Then we can add twin plugs for more pre boost response.