Commuter Bronco
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Senior User
Joined: Sep 2003
Posts: 254
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From: Colorado
Commuter Bronco
I had all these grand ideas for making my Bronco this awesome offroad truck, but...
I have someone who is selling me an '86 F-150 shorty, so I'm going to make that into my moster truck instead. Anyways..
I love my Bronco, and I want to continue driving it as my everyday vehicle, which is all highway miles to work and back. I'm thinking of putting an inline 6 into it with an overdrive transmission. Would it be reasonable to think that I could get around 20mpg on the highway if I had this engine with overdrive?
I have someone who is selling me an '86 F-150 shorty, so I'm going to make that into my moster truck instead. Anyways..
I love my Bronco, and I want to continue driving it as my everyday vehicle, which is all highway miles to work and back. I'm thinking of putting an inline 6 into it with an overdrive transmission. Would it be reasonable to think that I could get around 20mpg on the highway if I had this engine with overdrive?
Junior User
Joined: Oct 2003
Posts: 71
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From: Greensburg, PA
You want 20 mpg??? Well, my 89 XLT gets 19 on the highway, 300 I6, and between 14 and 16 in the city if I baby it. I'm completely stock with the M5OD Mazda trans. Is it possible... depends on how you drive it, but I wouldn't count on it!
Senior User
Joined: Nov 2003
Posts: 348
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From: Indiana
Take the head off the 4.9L, measure how far down in the bore the pistons are, strip the block down, and take it to a machine shop and have them deck the block by that amount.
Put a fuel economy cam in it.
Run all synthetic lubes, run 235/75/15 tires, put 2.73 gears in it. featherfoot the gas, and get 25 mpg.
Leastways that's my opinion
Steve
Put a fuel economy cam in it.
Run all synthetic lubes, run 235/75/15 tires, put 2.73 gears in it. featherfoot the gas, and get 25 mpg.
Leastways that's my opinion
Steve
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Senior User
Joined: Sep 2003
Posts: 254
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From: Colorado
Yeah, I'm with mustang man. I'm getting 8mpg right now, but the engine is worn. I'm going to be overboring the engine to be used in my new truck, giving me the opportunity to put an inline in my bronco (I love inline engines.. 
). Stell, you mention a fuel economy cam? Who makes those?
Thanks.
). Stell, you mention a fuel economy cam? Who makes those?Thanks.
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Elder User
Joined: Sep 2003
Posts: 533
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From: Myrtle Point, Or
My tires are what kills me.
I'm going to try to bump up my timing, since I never did finsih with that. It's still at 8-9, 10-11 is where is suposed to be, but I think I will go to 12, if i can.
I'm going to try to bump up my timing, since I never did finsih with that. It's still at 8-9, 10-11 is where is suposed to be, but I think I will go to 12, if i can.
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Elder User
Joined: Oct 2002
Posts: 861
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From: Marysville Wa
im gettin a preaty solid 10-11mpg on my rig, and i have given up on the idea of gettin better milage, it just does not seem posible. but when it comes down to what you hear and stuff, carb'd trucks just seem to get better milage, the guy that rebuilt my tranny, he says his 4bb 460 in his 2wd f350 gets on average 15-17 miles the gallon on the freeway.