Thread: 390 fe at the dyno, help please
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Old 04-29-2009, 10:28 AM
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Location: Thousand Oaks, CA
Cobra Make, Engine: Classic Roadster
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Rick,
I can see wear marks on the bottom of the lid to my air cleaner. The choke horn AND the choke plate are making contact. A definate restriction. I am replacing the intake manifold which is currently the Edelbrock Performer 390 with the Performer RPM. I am going with a new set of Cobra packs from Classic Chambered Exhaust 30" x 2 1/2" flow path. Tune the car with the aircleaner off using the existing carb 750cfm. If all looks good then replace carb without the choke horn and see where I'm at, either 650 or 750.

I would like to get a backpressure reading on the exhaust befor changing anything.

John
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