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73-87 Chevy _ GMC Trucks => 73-87 Chevy & GMC Trucks => Topic started by: BANova73 on February 05, 2014, 03:29:55 pm
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Im wondering what kind of MPG I could expect to get out of a 78 K 10 with a 350/4speed and a 3 inch lift kit and 31-33in tires gets and how i could increase the gas milage
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Anything that takes a truck away from stock is going to negatively effect the mpg. Stock size tires and height along with modest driving habits would be your best bet. A proper tune to assure your engine is running at peak efficiency is also key to decent economy. To many variables to even venture a guess...
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4 speed as in a sm465? you could increase the millage by towing it behind a cummins(http://www.naioa.com/v2/modules/Forums/images/smiles/run.gif)
keep it under 60 and dont take off so fast. i would imagine you have 3.73 gears in the axles so im kind of curious on your millage also
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I average 8.7 mpg in my '77 K20 with 31" Toyo Open Country M/Ts. THM350 automatic. The suspension is stock with a Part-time conversion on the NP203. It has 4.10:1 rear gears. Best I have got is 9.9 MPG and worst is 7.5 MPG
The engine needs a good rebuild as it has many miles on it and the Holley carb is junk! I have a new SM Quadrajet to put on it and a new intake, but it is a Vortec manifold and I need to get me some Vortec heads to go with it and then actually rebuild the engine!
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to add to the milliage question i have a 350 sm465/205 4.10 with my hummer tires 37.5x12.5r16.5 i get 9 MPG. with my 38x16x16 swampers i was getting 7-8