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12-12-2011, 10:49 AM | #26 |
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Join Date: Feb 2011
Location: Gainesville, FL
Posts: 406
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Re: First truck need ideas people
Nice truck!
You can make a six go faster but, if you do, it will be because you think its cool, not because it save you money or gas. The six is heavy, inefficient, probably leaks oil but will run a long time and has that old truck vibe. The people that designed it didn't care that much about fuel economy, because their customers didn't care that much about it. It is likely that you have the intergral head which tilts things even more toward the V8. Within the bounds of what is possible, you can build a SB to your ideal blend of performance and economy. If you do this on an engine stand you can aquire parts as they become available at a good price. You get to drive the truck throughout the build process and the switch could be made on one weekend, once the engine is ready. Or, if you are in a hurry, you could be like most of us and drop unreasonable money in an old truck. It is a losing proposition financially, but you get to grin while you drive around. You can get incremental improvement on MPG messing with the motor. You can get more from the gearing. The biggest improvements will come from driver behavior. If you add the gas savings from the various bolt-on products and additives, our trucks should run without gas. Sadly, they still won't make 25 MPG unless you have a diesel. If you make the high teens you will be doing well.
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Randy Summers Never brake in the learning curve! 1984 GMC Sierra project truck http://67-72chevytrucks.com/vboard/s...d.php?t=446737 Last edited by sumran; 12-12-2011 at 11:03 AM. |
12-12-2011, 11:58 AM | #27 | |
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Join Date: May 2009
Location: Motor City
Posts: 9,226
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Re: First truck need ideas people
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Figuring 70 miles per week divided by 12 gallons works out to around 5.8 mpg, which can't possibly be right unless something is really badly wrong. I would encourage you to actually check your fuel economy and do the math to get some hard numbers; you may be doing better than you thought. K
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Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/ Last edited by Keith Seymore; 12-12-2011 at 12:06 PM. |
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12-12-2011, 03:28 PM | #28 |
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Join Date: Aug 2009
Location: hillborough nc
Posts: 410
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Re: First truck need ideas people
awsome truck man!!! I have a stock 250 in my 79 Chevy and they are great engines. As long as the engine doesn’t give any trouble (mine poured oil out the side covers) drive it and enjoy it. my 79 got like 17 mpg when I was driving to college earlier in the year and it was pretty much stock had flowmaster duels and new plugs and rebuilt the carb that’s all I really did to the engine and it was fine till every gasket started leaking oil. So now I am building a 250 with 283 flat top pistons, sbc valves, towing cam, headers and a 4bbl carb, and eventually maybe go to a self tuning EFI system. stick with the 250 its just Different.
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77 chevy BIG 10 350/sm465/12bolt w 3.73 bout 240 horse power NO power steerin 79 chevy 1/2 ton 250/three on the tree/3.08s soon to get built 250/floor shift conversion/3.08s 81 mercedes 300d 25 MPG 77 chevy BIG DOOLEY 454/sm-465/14 bolt 4.10s "fully loaded" 73 plymouth duster 225 slant six/230 3 speed/8 1/4 trying to acheve 300 horse six http://www.cardomain.com/ride/3135091 '77 chevy trucks. built to stay tough. life is short build a hot rod |
12-13-2011, 11:13 AM | #29 | |
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Join Date: Dec 2008
Location: indisclosed
Posts: 1,515
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Re: First truck need ideas people
1) Verify odometer accuracy with highway mile markers.
Quote:
If i could expand on the topic, would the toyota 6 copy bring any mpg and power improvements due to using fuel injection systems? supra, landcruiser etc.? |
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