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930 cfm carb questions
Barry Grant DP 930 cfm questions.
I have an older Barry Grant 930 cfm carb, it is a reworked Holley 4779. A tech from BG said "The original jetting would have been 74 primary and 84 secondary with jet extensions on the rear. The pump cam would be pink. The old stage 3 carbs flowed a little over 900 cfm in the 4779 version." I have 78 primary, 88 secondary, with a pink cam on the secondary accelerator pump, and white cam on the primary side. Rear PV is blocked. Engine specs: 463 BBC Solid cam 236@50 .561 lift Merlin heads oval port milled for flat surface comp about 8.6 Edelbrock Performer RPM airgap 1 3/4 full length headers 3 inch exhaust T-350 2500 stall Is there anything I should change on the carb? Last edited by elcoman; 01-02-2010 at 04:29 PM. |
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bumping to the top
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How dose it run? What are you trying to accomplish here ? seems really stock.
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I want to use this carb for the 1/8th mile track near me. I want to be able to drive the 40 miles to the track, then run it.
It runs awesome with the 750 VS Holley on it right now. |
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It seems like you would have to know how it acted in the condition it is now, in order to determine where it may need adjustment.
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Well here is a more specific question. Is the pump shot suppose to be equal for front and rear, or does one get more, while the other one gets less? I want to heading in the right direction when I put it on the car.
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