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Re: Increase MPG by 50-80% with a cold vapor fuel system?
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Originally Posted by 72_GMC_Sierra_Grande
Actually, looking for anything I can do to improve my current MPG of 8.5 as it is my daily driver right now and will be for quite a while! Of course cost in gaining MPG is also a factor. Any ideas? Already replaced ALL ignition parts which gave me 1.5 MPG gain. The Edelbrock carb (not sure of size) with manual choke seems to be working pretty good although if it sets for more than a few days, it is hard to start! As for the gears, not sure what they are either! Pretty low though since if I do a rolling stop at a stop sign, I can leave it in 3rd gear with no problem! Thanks
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Look for some 2.73 gears. They were common in the late 70's and early 80's before overdrive came out. They often sell for less than the other gear options. With 2.73's, 4th gear will act like an overdrive and 1st gear actually becomes usable to start off in. I get about 15 mpg with my 72 GMC 4x4. It's got 3.08's, 350 engine and a 4 speed manual.
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1990 ¾ ton 4x4 Chevy Suburban
-Cummins Diesel - 12 valve - factory rebuilt
-6 speed bullet proof manual transmission - NV5600
-Gear Vendors Overdrive - HX35 Holset Turbo
-NP205 iron transfer case
-3.73 gears -2" Lift
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