930 cfm carb questions

[elcoman]

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?

[elcoman]

bumping to the top

[68 nova 10.5]

How dose it run? What are you trying to accomplish here ? seems really stock.

[elcoman]

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.

[Highway Star]

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.

[elcoman]

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.