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Old 04-25-2004, 12:12 AM
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Join Date: Feb 2002
Location: queens,new york
Posts: 355
poor gas mileage/1973 450sl

I have driven the car all week and have managed to get only 100 miles out of a tank of gas. I popped the hood and found the air cleaner hose disconnected from the crankcase. I reconnected it. How much did this contribute to my poor gas mileage? thanks

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Old 04-25-2004, 07:05 PM
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Join Date: Mar 2000
Location: Gainesville FL
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Very little I imagine.

That D-jet system needs a bunch of extra timing and a fuel/timing combination that gets 17in of vacuum at 800 rpms and you will get decent mileage.

I'd start with about an extra 7 degrees of timing and if an exhaust gas analyser isn't available go lean untill it runs bad and then go rich until you first reach highest manifold vacuum, hopefully 17in..

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Continental Imports
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