Miles per gallon- What are you getting?

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Nov 7, 2012 | 07:02 PM

#201

Sniper X

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Joined: Sep 2012

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Quote:

Originally Posted by Faol

I had my heads rebuilt, replaced the 2 bbl carb that had already been rebuilt twice and replaced the water pump...I am now getting 5 mpg LESS than I did. I have no idea what is going on. The heads are the same ones, just rebuilt due to the dried out valve seals.

8.5 mpg sucks.

check the timing and valve lash. And check to see if the new carb is jetted exactly the same as the old one.

Nov 19, 2012 | 03:10 PM

#202

87ramman

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Joined: Aug 2010

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From: Andover, KS

On my 87 D100 I get 10 city 12 highway, and thats not pushing the truck very hard at all. Its all stock. 318 and 3-speed auto. 83 thousand orig. miles.

Nov 20, 2012 | 01:04 PM

#203

Sniper X

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Quote:

Originally Posted by 87ramman

On my 87 D100 I get 10 city 12 highway, and thats not pushing the truck very hard at all. Its all stock. 318 and 3-speed auto. 83 thousand orig. miles.

Is that a 2bbl or a 4bbl carb?

Nov 29, 2012 | 10:07 PM

#204

TheDarkFox

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I have an 87 D-100 with a 318 and what i *think* is the 727, not sure. All bone stock, and well maintained. Single cab-short bed, 2wd.

I get 14mpg combined. So probably like 17mpg on the highway? Something close to that anyway.

Nov 30, 2012 | 10:45 AM

#205

Sniper X

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Quote:

Originally Posted by TheDarkFox

That is good for an auto with a carb. My 1974 Chevy with a 4 speed and 350 4x2 3/4 ton only gets 18 on the freeway and about 16 combined.

Dec 3, 2012 | 09:36 AM

#206

87ramman

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Joined: Aug 2010

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From: Andover, KS

Quote:

Originally Posted by Sniper X

Is that a 2bbl or a 4bbl carb?

haha its a 1bbl cali truck.

Dec 3, 2012 | 01:05 PM

#207

crazzywolfie

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Joined: Jun 2009

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From: orangeville ontario

Quote:

Originally Posted by 87ramman

haha its a 1bbl cali truck.

i got to say if it has a 1 bbl carb then someone has replace the carb or you are assuming it is a 1 bbl carb. i think the only engine to run a 1 bbl carb was the slant 6

Dec 4, 2012 | 01:19 PM

#208

codyglock

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Quote:

Originally Posted by crazzywolfie

i got to say if it has a 1 bbl carb then someone has replace the carb or you are assuming it is a 1 bbl carb. i think the only engine to run a 1 bbl carb was the slant 6

there was about an 86 d250 in my local junkyard once that i believe had a 1bbl on it and it was a v8

Dec 4, 2012 | 01:34 PM

#209

87ramman

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From: Andover, KS

Yeah I know it was def. stock. These cali trucks seem to be a whole different beast to mod. Mine also came stock with 2 cats, anyone ever seen this before?