Better gas mileage - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bosco200 · 01-30-2011, 01:45 PM

I have 250 inline with a monojet rochester on it....Ok so I rebuilt it cuz it needed a rebuild...but I think the parts that I put in the carb were older parts cuz i didn't buy the kit a guy gave it to me....so I rebuilt it again....but the gas mileage is horrible I can drive about 30 miles and if its a full tank to will drop to the to the line before the half a tank mark....it has 4.57s so I'm running about 3600 rpm at around 60 mph but I dont think it would drop that much.....it isnt leaking out of the line or anything....is there a diffrent carb I could put on there without having to change alot of things that would get better gas mileage?

01-30-2011, 01:45 PM	#1
bosco200 Registered User Join Date: Dec 2009 Location: Ste. Genevieve, MO Posts: 526	Better gas mileage I have 250 inline with a monojet rochester on it....Ok so I rebuilt it cuz it needed a rebuild...but I think the parts that I put in the carb were older parts cuz i didn't buy the kit a guy gave it to me....so I rebuilt it again....but the gas mileage is horrible I can drive about 30 miles and if its a full tank to will drop to the to the line before the half a tank mark....it has 4.57s so I'm running about 3600 rpm at around 60 mph but I dont think it would drop that much.....it isnt leaking out of the line or anything....is there a diffrent carb I could put on there without having to change alot of things that would get better gas mileage? Last edited by bosco200; 01-30-2011 at 01:47 PM.



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