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Old 06-03-2005, 06:13 AM
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5.0 Ford with 600 Holley DP

I have a 89 Ford 5.0HO mustang motor in my 73 Bronco. The cam and heads are stock with an Edelbrock performer manifold. The carb I have on it now is a 600 Holley DP. Tranny is C4 auto. Is this just too much carb. I have a 7.5 PV in it, 65 mains and 73 jets in secondary. Before I put the 65 in the primary, I would get lean spots at part throttle. But now at crusing speed the motor seems pretty rich.

I was thinking about opening up the power valve restriction holes and jetting down on the carb. What about putting on a billet Quick Fuel metering block. It says that it has jets for the PV restrictions.

Maybe I just have too big of a carb, but I really dont feel like buying a new carb.

Any advice.

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Old 06-03-2005, 09:14 AM
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600 Dp

You definately dont need a DP with automatic, however, a vacuum secondary 600 wouldnt be overly large. I would recommend going down to a 500-550 CFM carb with vacuum secondaries. You just cant use all that 600 with your stock heads and cam. A 500 would carry you well past 5500 RPM. I would go with a smaller carb, get better throttle response, and even some nominal increase in gas mileage.

Last edited by Max Keith; 06-03-2005 at 09:22 AM.
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