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View Full Version : Almost 14 MPG - Get outta here !


cfg7613
12-18-2007, 11:09 AM
Something's got to be wrong here...just had the carb rebuilt and remanufactured cylinder heads for the 88 GW with 101,000 miles about a year and 3000 miles ago...could it be possible ??!! Nahhhhh - something's got to be wrong.......:)

rustywagoneers_com
12-18-2007, 11:15 AM
wifes waggy (89, with a reman engine i got in a 82 parts wag) with 31's (bfg a/t) and 2.72's gets 14 pretty regularly with a q-jet. nearly 15 when it is hot outside (much less time on the choke)

peace
Dave

Charlie_B
12-18-2007, 11:18 AM
HAHAHA. Good job!
That sounds like me when I get 11 mpg. :dancingbanana:

AMX factor
12-18-2007, 11:22 AM
Quite possible. I got 14.5 to 15.2 with my 87GW - 360, 210K miles, 31's, edel intake, better cam, edel headers, edel 1405 4b carb, upgraded ignition and keeping my foot off the skinny pedal. With all that aside I got 12 average.

armyfsj
12-18-2007, 11:25 AM
Thats pretty good I can only get 14-16 outa mine on the highway and thats with a heavy tail wind.:eek:

azwagoneer80
12-18-2007, 12:07 PM
I can't get out of the 10-11 range, but mine is a Full time. It runs excellent, and the plugs almost look like it runs too lean. Maybe I should just do the cam, intake and carb swap. Everybody seems to get better mileage, as long as they stay out of the throttle.

skeletor
12-18-2007, 12:15 PM
i average 12 but i can get 14 if i dont open up the 4 barrel. and thats with a 360/th400/QT with wide tires.

Ristow
12-18-2007, 12:45 PM
14 is about average on my '83 cherokee. 32" tires.

COLOFIREMAN
12-18-2007, 02:19 PM
Nahhhh you guys are not living the amercian dream uless you have a Buick 455 that gets 6 MPG:eek: , on a good day, down hill, with a tail wind!!!!!!:cool:

Chrome
12-18-2007, 02:27 PM
CONGRATS!!! Mine couldn't hit 14 mpg even at idle with someone pulling me.

AlsChopShop
12-18-2007, 02:30 PM
i always got 10mpg during city or highway, it was a joke. should be pullin a solid 14mpg with the new setup around town, i'm hoping 16 on the highway (lifted and big tires doesn't help).

Al

waynestiles
12-18-2007, 03:33 PM
Just got home from a 325 mile round trip to my gunsmiths place. I-80/90 most of the way about 20 miles of 2 lane at each end both ways. holding about 70-75 mph on the Toll Rds (had to keep out of the trucker's way). I filled up before I left, when I got there, and when I got back home. just calculated the mileage @ 15.7 .
Its all stock except for the ignition improvements--87GW 360 auto. Its going in for the Edlebrock manifold and 1406 transplant, finish the desmogging and replace/renew all vacuum stuff on Thursday. I may never see that mileage again.

nsanebiker
12-18-2007, 06:08 PM
Everybody seems to get better mileage, as long as they stay out of the throttle.


How do you do that????? :D :confused: :D :confused:

1977cherokeechief
12-18-2007, 06:18 PM
How do you do that????? :D :confused: :D :confused:


i need to find that out as well, how do you stay off of the skinny petal?



i finally drive my truck to school and back, im guessing that i am getting about 8-10 MPG (all highway but maybe a mile, and i have to travel about 10 mile to school, one way.:banghead: ) that is with a 258, th400/QT. but i do have 33X12.50 AT,

shimniok
12-18-2007, 06:45 PM
Nice job! For all the people that get 14-15mpg there are a **LOT** of people out there getting 12 or less...

goldhammer
12-18-2007, 11:08 PM
12.25 around town, 14.5, on the freeway/highway at 65mph, weight around 6500 (overloaded when we go camping/wheeling, you could live for a month with what the better half brings for a 3 day w/e). 360, stock exhaust, 2bbl, 3.31's and 31-10.5's. Down side is rowing the shifter for the T-18. But we are trying to push a shoebox through a hurricane:D :D

Had a 75 gm with a 4bbl 350 and a/t. 10 mpg empty and 9.5 with 2200 lbs of 10.5 foot cabover camper on it, miss thaqt thing sometimes, but not often.

motox-010
12-19-2007, 08:49 AM
I spose that a mileage check is in order on mine, I havent checked since this time last year. I could do that tomorrow since I dont work.