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View Poll Results: MPG????
5-10 258 26.01%
10-12 393 39.62%
12-15 248 25.00%
15-20 93 9.38%
Voters: 992. You may not vote on this poll

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  #241  
Old 06-03-2008, 07:04 PM
chemijeeper chemijeeper is offline
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I was just thinking about it while doing some internet wandering...if you deactivate 2 cylinders, closing both the intake and exhaust valve(still working on the 'How' part of that) the turbo would then become oversized for the now 2 cylinder engine, creating a very lean mixture=high egts=bad. maybe a variable wastegate or compound wastegates to limit the boost??

Hopefully smarter people than me will chime in.
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  #242  
Old 06-06-2008, 09:08 AM
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Mack_T Mack_T is offline
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Location: Rohnert Park, CA
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Just some more infos I recorded last weekend in my GW:

Trip to Ukiah from Rohnert Park. About 70 miles one way. Filled up in RP (almost Cotati if you are checking the numbers on Google Maps), and filled in Ukiah. My odometer is wrong, with the larger tires, but in any case...
3 gallons.

That was cruising. I mean really cruising. Gas station to freeway, 1/4 mile. And the same in Ukiah. The entire trip was cruise control at 60 mph (except where it was 55 or slower). No harsh accelerations, wind, or anything. It was foggy in RP, and clear in Ukiah. All windows were closed, it was cool enough to use the heater a little.

Now the trip back was another story. We hit traffic, the wind picked up, it was dry but warmer. We also had the 2 front windows & rear window open. I used at least twice as much fuel on the return trip. Another factor could have been fuel quality; during the week I always use the same gas station. When you go out of town, well, you have to use what's there.

I was also loaded with 4 occupants as well as gear

Clay
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1987 Grand Wagoneer Daily Driver "The Family Wagon"
Bilstein 5125's, 9" front, 8.5" rear
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  #243  
Old 06-13-2008, 12:23 PM
YoungClayB YoungClayB is offline
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Quote:
Originally Posted by Mack_T
Just some more infos I recorded last weekend in my GW:

Trip to Ukiah from Rohnert Park. About 70 miles one way. Filled up in RP (almost Cotati if you are checking the numbers on Google Maps), and filled in Ukiah. My odometer is wrong, with the larger tires, but in any case...
3 gallons.

That was cruising. I mean really cruising. Gas station to freeway, 1/4 mile. And the same in Ukiah. The entire trip was cruise control at 60 mph (except where it was 55 or slower). No harsh accelerations, wind, or anything. It was foggy in RP, and clear in Ukiah. All windows were closed, it was cool enough to use the heater a little.

Now the trip back was another story. We hit traffic, the wind picked up, it was dry but warmer. We also had the 2 front windows & rear window open. I used at least twice as much fuel on the return trip. Another factor could have been fuel quality; during the week I always use the same gas station. When you go out of town, well, you have to use what's there.

I was also loaded with 4 occupants as well as gear

Clay

So what was your MPG? I am calculating just over 23 MPG...can't be right
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  #244  
Old 06-14-2008, 04:30 PM
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Mack_T Mack_T is offline
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Quote:
Originally Posted by YoungClayB
So what was your MPG? I am calculating just over 23 MPG...can't be right

Yeah, everytime it does that to me I think the pump at the gas station is broken or something. Really odd occurance... and it does not do that all the time either. It did good like that last year on my trip to Usal beach up North as well, and has happened several times on that same trip to Ukiah. So, my mileage varies from around 15-17 to 20-23...

If only I could figure out what it takes to do that

Clay
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1987 Grand Wagoneer Daily Driver "The Family Wagon"
Bilstein 5125's, 9" front, 8.5" rear
CA legal (stock) 360 with a flipped a/c lid
Rough Country 3" front springs
Rough Country AAL/ block rear
Custom interior bicycle rack
-------------------------------------------------------
http://www.carleynet.net/familypictures
www.sonic.net
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  #245  
Old 06-27-2008, 06:20 AM
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shimniok shimniok is offline
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Join Date: Jan 08, 2003
Location: Centennial, Colorado
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Latest gas mileage since tweaking to fly thru emissions (these entries are a mix of city and some hwy driving):

5/4 - 143543.3 - 116.1 - 10.9 = 10.7 mpg (pre emissions)
6/10 - 143728.6 - 185.3 - 14.5 = 12.8 mpg (post emissions)
6/26 - 143912.4 - 183.8 - 13.6 = 13.5 mpg

Holy econobox, Batman! Looks like the carb tweaks also helped with fuel economy...

Since inserting the "new" motor, mpg (I record all fillups) has ranged from 10-11 city & mixed, and 12-13 hwy on wheeling trips. Eager to see what kind of mpg I get on the way to the trail on Sunday...
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  #246  
Old 08-31-2008, 07:08 PM
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Wagonforever Wagonforever is offline
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Location: Davisburg, MI
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So your getting better mileage after reinstalling your emission equipment? My 90GW which had almost all the emissions equipment removed got much better mileage than my 86GW with all the emissions equipment installed and functioning. My 90 got around 14 mpg mixed driving with a light foot, my 86 has been averaging 10.5 mixed driving. It's now even worse since I replaced the PCV valve. Now I'm down around 9.5 so I'm sure I need to re-tune my carb, but my oil consumption has gone down.
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  #247  
Old 09-01-2008, 05:24 PM
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Topher Topher is offline
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If yer runnin the MC2100 make sure you have an adequit vacuum supply going to the power valve. Mine was getting 8 mpg. I found a loos hose connected to the hose going to the pv and when I connected it the mpg went up to 11.5. I'm tinkering and have gotten this 86 to 12.09 as of this morning. I did have a 258 in an 83 up to 15 mpg. My last wag, an 85, got 13.5. All of these are Waggies.
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  #248  
Old 11-03-2008, 08:22 AM
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I have had my Waggy for a couple of months now and finally took a trip long enough to calculate fuel mileage....14.3...mostly highway, went through some small towns
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  #249  
Old 11-04-2008, 06:57 PM
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82 Widetrac 82 Widetrac is offline
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Location: Close to Saskatoon, SK Canada
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I just went through my first tank of gas with the fsj. I figured out the mileage on my rig to be at 15.1 miles to the gallon, this is a 80/20 highway/town driving.
Right now it is running rich and still has all of the emissions hooked up. One of these evenings I want to bypass the emissions and tweak the carb then see how all that effects the mileage.
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  #250  
Old 11-08-2008, 08:34 PM
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jeepsohigh jeepsohigh is offline
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Location: St Charles MO
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I took the truck on a longer trip this week and got a solid 10MPG driving 90% highway at about 65mph.

specs are
  • 82 sportside
  • 360 all stock
  • tf727
  • 4:10 gearing
  • 35x12.50x16.5 tires
I got lots of lookers rolling down the road
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  #251  
Old 11-27-2008, 08:50 PM
budojeepr budojeepr is offline
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Last weekend I took the diesel Wagoneer on a 170-mile trip, some mountain two-laner (up and down, elevation change ~5300 feet) at 50-65mph, some dirt road at 15-35mph, some flat highway at 65-75mph.

Got 18.36mpg.
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  #252  
Old 11-28-2008, 02:30 PM
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fulsizjeep fulsizjeep is offline
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Our AZ trip so far: we are getting 14.24 mpg with a stock 401 w/4350 carb, T400, QT, 3.07 gears and 31s tuned for 7000 feet. She rolled over 100K between Kayenta and Tuba City coming down. We are pretty happy with that. We have seen 87 octane gas for $1.89 down here too.
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  #253  
Old 12-04-2008, 01:44 PM
mimmp mimmp is offline
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Quote:
Originally Posted by budojeepr
Last weekend I took the diesel Wagoneer on a 170-mile trip, some mountain two-laner (up and down, elevation change ~5300 feet) at 50-65mph, some dirt road at 15-35mph, some flat highway at 65-75mph.

Got 18.36mpg.

It's a shame that the new diesel fuel is so much more expensive than gas. I have been thinking about switching, more for the project than the savings, but I've decided against it because it would cost more to drive the Waggy than it does now. For example, this morning I filled up at $1.79, diesel was $2.97. I've been averaging 12.5 mpg for a couple months; you got 18.36 ( which is admirable). It costs me 13.8 cents per mile with gas, but (at your mileage) it would cost 16.17 cents per mile. Now, I know that for the most part that's only $5 or $6 a week difference for me, but I need to think about it for a while.

I may still take it on as a project, but it's on the back burner for now. (New Katzkins are on the front burner.)
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  #254  
Old 12-04-2008, 01:59 PM
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fulsizjeep fulsizjeep is offline
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The return trip from AZ was 12.7 mpg average. It is all uphill from Phoenix to Flagstaff and a lot of hill climbing for the rest of the trip too. I am happy with that out of a 401.
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88 GW, 401/727/208, 5" lift, D44s/4.10s/locked up, 35s with a few Evil Twin & TT's Fabworks mods
76 401 Wag, 77 401 Wag, 77 401 J20
http://eviltwinfab.com http://www.ttsfabworks.com
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  #255  
Old 02-04-2009, 09:10 PM
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I get 9 mpg in the city and 25 on the highway* who knew?




* I draft behind 18 wheelers a lot LOL
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  #256  
Old 02-05-2009, 11:25 PM
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I get 11 mpg on propane.
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  #257  
Old 02-06-2009, 07:23 PM
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Chris P. Chris P. is offline
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I got 14.8 on a 100 mile interstate run today going 70-75 mph.

360-T18 with 3.54 gears and 31 in tires. A little more TBI tuning may get me over 15.
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  #258  
Old 02-20-2009, 12:02 PM
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Just bought it first run 9.6 mpg, scary! Well time to start with the basics, air cleaner and such.
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  #259  
Old 03-17-2009, 01:25 PM
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duncanstives duncanstives is offline
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I think I average 7-10... I drive with a REALLY heavy foot though... with my jeep you can be pretty sure that if the ires arn't squealing either:
A: I'm not in it
B: Its broken. This is the case now... I think the accelerator pump is still not right because it dies if you stomp on the gas... You have to give it gas gradually.
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  #260  
Old 03-21-2009, 06:03 AM
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2ToneBluJ10 2ToneBluJ10 is offline
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In 1993 I got 21 mpg on a trip from New Bern,NC to Williamsport,PA via Delaware Water Gap, NJ about 750 miles, and fuel tank wasn't cracked then it finally cracked in 1997. Haven't checked it for years until I replaced the tank with one of the rare ones without cracks in 2007, rechecked then and it was getting 15 mpg combined city/hwy. Thats with the stock PITA Carter BBD after rebuilds and tune-ups and I mostly keep my foot out of it.......mostly! But it is a 258 I6 and I do get on it occasionally.
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