I ordered springs for the Mopar/Mallory YH style distributor. I am trying to lower the total timing including vacuum advance. I've been getting detonation at highway cruise speed. The distributor is a Mallory with a 9" canister which gives over 20" vacuum advance. The distributor mechanical advance is adjustable but the timing comes all in too early. With 13* initial timing I am reading well past the 50* max on the timing tape-looks like almost 60*.
What curve do these heavy cars need? I'd like to keep the vacuum advance adjusted as it was originally for economy as well as have good initial timing. When set at 12* the vacuum is only about 15". I have an edelbrock 1411 750 cfm carb.
Thanks
Howard
What curve do these heavy cars need? I'd like to keep the vacuum advance adjusted as it was originally for economy as well as have good initial timing. When set at 12* the vacuum is only about 15". I have an edelbrock 1411 750 cfm carb.
Thanks
Howard
