Carburator question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Red69stepside · 09-07-2004, 02:23 PM

Hi all:

Is there any option for reducing my gas mileage, even a little? My rebuilt 327 and Holley carb has GREEAT torque, but it's sucking down gas so fast I can barely get from home to work without a fillup.

I see lots of carbon in my exhaust pipes, and smell fresh gas a lot. I know this could be from the breather, but could also be from a lot of unburnt gas in the carb.

Also PO seems to have removed the choke butterfly from the carb. Would this contribute to low gas mileage?

I heard about a Rochester carb with low-flow primaries and big secondaries that only kick in when you need them? Sounds like a good solution if it's real.

Any help appreciated.

09-07-2004, 02:23 PM	#1
Red69stepside Registered User Join Date: Jul 2004 Location: Washougal, WA Posts: 110	Carburator question Hi all: Is there any option for reducing my gas mileage, even a little? My rebuilt 327 and Holley carb has GREEAT torque, but it's sucking down gas so fast I can barely get from home to work without a fillup. I see lots of carbon in my exhaust pipes, and smell fresh gas a lot. I know this could be from the breather, but could also be from a lot of unburnt gas in the carb. Also PO seems to have removed the choke butterfly from the carb. Would this contribute to low gas mileage? I heard about a Rochester carb with low-flow primaries and big secondaries that only kick in when you need them? Sounds like a good solution if it's real. Any help appreciated. __________________ 69 Stepside. Rebuilt 327, HT 350 tranny, Holley carb, Edelbrook intake; Flowmaster dual 2.5-inch exhaust.



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