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Old 08-06-2017, 06:40 AM
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LoBelly LoBelly is offline
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Hello Andrew

In very round figures, at 6000 rpm the 302ci is pumping about 525cfm, about 612cfm @ 7000rpm.
(1 cfm = 1728cim)

The Holley recommendation therefore appears to correct (as you'd expect).

When it came time to replace my aged and wobbly 700 double pumper I looked at the cost of refurbishing myself against a factory refurbished carburetor and decided that with the state of my carburetor and the number of things I wanted replaced - getting a refurbished carburetor was cheaper.

Holley has an ebay store where they sell factory refurbished carbs, I bought one, it arrived looking new and it has worked very well after a bit of tuning.

http://stores.ebay.com.au/Holley-Performance

Your main choice will be between vacuum secondaries or a double pumper.

There are some nice 600 double pumpers or vac secondary 4 barrels currently listed that I think would suit nicely.

Personally I would keep it simple and get something like this:
Holley 0-4776S 600CFM Shiny Double Pumper Factory Refurbished 4bbl

If you're worried about the fuel economy then maybe look at the vac secondary equivalent.

Come to the AGM and talk carburetors - you'll get plenty of input.

Apologies to all the carburetor gurus for the forgoing massive over-simplifications.

Good luck Andrew.

LoBelly
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