I have a new exhaust system (flowmaster) single into duals. I got a tornado for my air intake. Tuned up resently. Timing is right on. I have a new O2 sencer. It is a 350 TBI. I get about 11 high way and 8 in town.
2006-11-19 09:08:10 · 4 answers · asked by curtisnickum519@sbcglobal.net 1 in Cars & Transportation ➔ Maintenance & Repairs
The Flowmaster may help power, but I've never seen a careful test ever show the Tornado to actually work. There are only two things I can think of that might have much of a chance to do anything for this truck. One is to put a cover over the bed to reduce drag, preferably a rigid fiberglass one. The other is to reduce weight - either by removing things you don't need to haul around, or by swapping out parts for lighter performance equivalents - fiberglass body panels, aluminum cylinder heads, carbon fiber driveshaft, that sort of thing.
2006-11-19 10:06:29 · answer #1 · answered by Mad Scientist Matt 5 · 0⤊ 0⤋
The only thing I have repeatedly heard (as in first-hand, real accounts) of increasing mileage, are the throttle body spacers. These work by increasing the air turbulence of the intake, which increases efficiency. This is part of how the Vortec heads work, which add power and mileage. My Mom's husband, who is very...uhm, somewhat anal...put one on his Ford F-250 with 460 engine, and ran a before and after test, on the same route, with the same load, at nearly identical temperatures and speed, and found his throttle body spacer to add nearly 2 MPG! That's huge, actually. I have many similar stories. These only help at slower speeds around town, or some winding country roads. They offer no benefit at highway speeds, as the air moves through them too fast to be affected. The only drawback is that they often have a whistle, or louder sound that some people find objectionable. They run about $100.00 to $125.00.
2006-11-22 01:55:38 · answer #2 · answered by cor2_913 2 · 0⤊ 0⤋
Make sure your tires are properly inflated, air pressure too low creates drag. Drive slower like 55. It won't be impressive increases, but it will change for the better. Low gas mileage is part of owning a truck.
2006-11-19 19:14:22 · answer #3 · answered by randyhoover 2 · 0⤊ 0⤋
I would bet none of the things you have done made any difference.
Install a higher ratio rear end,eg. you now have a 3:11, put in a 2:50.
Drive slower.
Get a smaller girlfriend.
2006-11-19 17:41:05 · answer #4 · answered by Anonymous · 0⤊ 1⤋