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#1
08-03-2004, 09:03 AM
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78 vette mpg
My 78 has 43,000 miles on it..I have new plugs,wires.dist cap.points etc
carb..no emmissions pump ..I still can't get over 10 mpg..am I missing something..or do I have to live with this? I still have the stock air cleaner on it, 
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#3
08-19-2004, 09:09 AM
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I have a elderbroc 795 on it but got the same mpg before with the stock carb..
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#4
08-19-2004, 12:02 PM
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My stock '80 got closer to 17 MPG with the stock Q-jet! The setup (before I got creative) was L-48 350 with the 4 speed manual transmission. I know the rear gears on the '80 were waaaay different than on the 78 and 79. Something about the fuel milage requirements of the EPA or CIA or ..... So If you have a relatively short rear gear (drag racer) you may only get 10-12 miles per if you drive it hard. I still think even with the Edelbrock carb you could do better. I would check fuel float settings and fuel pressure. Also the coil in the HEI distributors can be a real pain. Check that too.
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#5
08-19-2004, 12:27 PM
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Re: 78 vette mpg
thanks for the info..I will check out the float settings and the coil in the dist..one las tthing. the car runs about 220 degrees after about a half hour of under 50 mph..fan looks good..pump looks good..is this normal..would like 180 degrees
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#6
08-19-2004, 04:04 PM
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Re: 78 vette mpg
Seems pretty high. The 180 degree thermostat should keep the car at or around 200 degrees in traffic. Do you have the skinny radiator or the 4 row big boy that came stock with big block cars?
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#7
08-19-2004, 04:11 PM
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Re: 78 vette mpg
I
have the stock radiator..probably need to upgrade ..or re-rod the stock..
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