The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - What kind of gas mileage do you get with your 67-72?

weim55 · 10-01-2018, 09:10 PM

SWB fleet 1/2 ton, '99 roller cam 350 9.8 compression w/ mild cam, Edelbrock performer intake and AFB carb, headers, TH400 w/2500 stall, 3.54 rear. 15mpg @ crystal 65mph, 11mpg @ 75mph, 10-12mpg mixed driving. 10mpg pulling the race car on a trailer @ 60 mph. 5000-7500 feet elevation.

In my years of engine building I found a typical V8 will get one additional mile per gallon per point of raised compression.......

Steve weim55 Colorado

10-01-2018, 09:10 PM	#16
weim55 Registered User Join Date: Jan 2017 Location: Larkspur, Colorado Posts: 910	Re: What kind of gas mileage do you get with your 67-72? SWB fleet 1/2 ton, '99 roller cam 350 9.8 compression w/ mild cam, Edelbrock performer intake and AFB carb, headers, TH400 w/2500 stall, 3.54 rear. 15mpg @ crystal 65mph, 11mpg @ 75mph, 10-12mpg mixed driving. 10mpg pulling the race car on a trailer @ 60 mph. 5000-7500 feet elevation. In my years of engine building I found a typical V8 will get one additional mile per gallon per point of raised compression....... Steve weim55 Colorado Last edited by weim55; 10-01-2018 at 11:12 PM.