: Octane Recommendations



jace
07-27-04, 04:27 AM
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.

Imprl59
07-27-04, 09:08 AM
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.

caddycarlo
07-27-04, 10:34 AM
or the carb has a problem and is dripping fuel .......