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Octane Recommendations

1K views 2 replies 3 participants last post by  caddycarlo 
#1 ·
have a stock '72 Eldo with the big 500ci..every so often it will diesel..i've been using 87 octane...if timing is correct and very little carb build-up, could this be the most likely reason? compression ratio is 8.5:1...will using a higher octane solve the problem? thanks in advance..all advice welcomed.
 
#2 ·
jace said:
have a stock '72 Eldo with the big 500ci..every so often it will diesel..i've been using 87 octane...if timing is correct and very little carb build-up, could this be the most likely reason? compression ratio is 8.5:1...will using a higher octane solve the problem? thanks in advance..all advice welcomed.
87 should be fine in a '72. I would check the idle speed to see if maybe it is idling a little high.

Steve B.
 
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