Thread: what carb should i chose

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I have a mildly built 350 small block. An edelbrock performer air gap intake manifold. and a 750cfm edelbrock carburetor. The engine is running a bit rich (8miles to the gallon). Should I get a 4barrel edelbrock 600cfm or a quadrajet carburetor(dont know too much about these but heard they were great for mileage and performance)?

The Edelbrock and Qjet have different bases and use different manifolds.

Since you have a 750 Edelbrock, let's work with that. It's an excellent carb for your engine, but is almost certainly rich "out-of-the-box" as most Edelbrocks are. Go to Edelbrock's web site and download the manual.

http://www.edelbrock.com/automotive_...ess_main.shtml

Your stock main jets are .110” and metering rod size is .075” x .047”. I'd recommend going down to a .107” on the main jets (part number 1431) and a .073” x .047” (part number 1456) on the rods. You'll be amazed at the difference.

The jets are $4.00 and the rods are $8-9.00. Be sure to change the gasket (part number 1499). Another $12.00

To go leaner you could try .104” mains (part number 1430) and .070” x .042” (part number 1450) on the rods.

Good Luck,
Glenn

hmmm... never thought of that. thanks for the input.

Originally Posted by danielwitdaelco

hmmm... never thought of that. thanks for the input.

Comment withheld.

Good job Glenn.