Power Wagon Fuel Economy
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- Sweptline.ORG Member
- Posts: 101
- Joined: Thu Feb 25, 2016 4:10 pm
- City: ROCHESTER HILLS
- State: MI
Power Wagon Fuel Economy
Hi everyone,
New to the forum, and currently hunting for an old Sweptline to wrench on. I'm just curious as to what kind of fuel economy everyone gets out of their Power Wagons?
I'm specifically hunting for 318 and 383 fuel economy.
Any information would be appreciated!
Thanks,
Dan
New to the forum, and currently hunting for an old Sweptline to wrench on. I'm just curious as to what kind of fuel economy everyone gets out of their Power Wagons?
I'm specifically hunting for 318 and 383 fuel economy.
Any information would be appreciated!
Thanks,
Dan
Re: Power Wagon Fuel Economy
Worn 318 poly, 2 bbl., 4 speed, 4.88 gears = 10 mpg maybe on a good day.
Re: Power Wagon Fuel Economy
10 mpg is pretty close for 318 or 383 power wagon.
I sold all of my sweptline trucks,except the invisible one. I just couldn't stand to see it go!
( )
91w350 CTD
93w250 CTD
( )
91w350 CTD
93w250 CTD
Re: Power Wagon Fuel Economy
fairly fresh 360-4 barrel headers - np 435 4.10 gears = 10 mpg
jim
jim
- PwrWgnWalt
- Sweptline.ORG Member
- Posts: 388
- Joined: Wed Dec 31, 1969 6:00 pm
- City: Butte
- State: MT
Re: Power Wagon Fuel Economy
Here are some of my more recent drives:
360, 4-speed, 4.10 gears = 10 mpg
(loaded = 9 mpg)
318, 4 speed, 3.91 gears = 12-13 mpg
225, 4 speed, 4.88 gears = 11 mpg
225, 3 speed, 3.55 gears = 15-16 mpg
360, 4-speed, 4.10 gears = 10 mpg
(loaded = 9 mpg)
318, 4 speed, 3.91 gears = 12-13 mpg
225, 4 speed, 4.88 gears = 11 mpg
225, 3 speed, 3.55 gears = 15-16 mpg
- WD
- Sweptline.ORG Pioneer
- Posts: 1741
- Joined: Wed Dec 31, 1969 6:00 pm
- City: Rosemark
- State: TN
- Location: Lancaster Plantation
Re: Power Wagon Fuel Economy
Late models are no better... 330hp at the flywheel TBI 5.7/700r4/NP241. 3.40 something or 3.70 something gears. Lt265/75R16E mud tires. True dual exhaust with glass packs.
10mpg empty or loaded.
D series with a 318/727/3.55 gears gets 9-11. True dual exhaust, generic turbo mufflers, LT235/75R15D AT tires.
A cinder block on a roller skate is not going to be fuel efficient.
10mpg empty or loaded.
D series with a 318/727/3.55 gears gets 9-11. True dual exhaust, generic turbo mufflers, LT235/75R15D AT tires.
A cinder block on a roller skate is not going to be fuel efficient.
If I didn't build it, it ain't mine.
1949 Dodge B1B-108; 1969 D100-128; 72 Super Beetle; and a bunch of others...
1949 Dodge B1B-108; 1969 D100-128; 72 Super Beetle; and a bunch of others...
Re: Power Wagon Fuel Economy
"A cinder block on a roller skate is not going to be fuel efficient."
Thats a good one!
Thats a good one!
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- Sweptline.ORG Member
- Posts: 101
- Joined: Thu Feb 25, 2016 4:10 pm
- City: ROCHESTER HILLS
- State: MI
Re: Power Wagon Fuel Economy
Thanks for all your input!
I was debating between a 318 or 383, depending on if the fuel economy was significantly different, but it looks like 10 MPG is about as good as these puppies get regardless of displacement.
I was debating between a 318 or 383, depending on if the fuel economy was significantly different, but it looks like 10 MPG is about as good as these puppies get regardless of displacement.
- riffraff
- Sweptline.ORG Member
- Posts: 220
- Joined: Sat Apr 19, 2014 12:16 am
- City: Newport Beach
- State: CA
Re: Power Wagon Fuel Economy
My W100 was getting 9 mpg when I got it: 383, 435np, 4.10, 4 barrel, electronic ignition (and supposedly an RV cam). I put a new dual exhaust, with an A/F bung, etc, and, with a lot of work, was able to tune it down to 7 mpg, around town, at sea level
Mind you, I was aiming for economy at cruise. I'm at about 14.7-15:1 A/F cruise, and 12-13ish WOT.
I don't bother with the math, anymore....
![Laughing :lol:](./images/smilies/icon_lol.gif)
Mind you, I was aiming for economy at cruise. I'm at about 14.7-15:1 A/F cruise, and 12-13ish WOT.
I don't bother with the math, anymore....
Tom
1969 W100 383/435
1969 W100 383/435
- sweatybetty
- Sweptline.ORG Member
- Posts: 205
- Joined: Wed Dec 31, 1969 6:00 pm
- City: s.w.
- State: OR
Re: Power Wagon Fuel Economy
im about the same but with a 440. maybe 10mpg on a good day. i MAY drive 50 miles a month, so its no big dealriffraff wrote:My W100 was getting 9 mpg when I got it: 383, 435np, 4.10, 4 barrel, electronic ignition (and supposedly an RV cam). I put a new dual exhaust, with an A/F bung, etc, and, with a lot of work, was able to tune it down to 7 mpg, around town, at sea level![]()
Mind you, I was aiming for economy at cruise. I'm at about 14.7-15:1 A/F cruise, and 12-13ish WOT.
I don't bother with the math, anymore....
Re: Power Wagon Fuel Economy
all you need to know is its better than a ford. ;/)
my 4.88 slant 6 D300 with 19.5s got 17 if I kept it under 60
my poly D300s get 10 to 14 depending on speeds and conditions. as low as 9 towing another truck on trailer.
my 4.88 slant 6 D300 with 19.5s got 17 if I kept it under 60
my poly D300s get 10 to 14 depending on speeds and conditions. as low as 9 towing another truck on trailer.
- riffraff
- Sweptline.ORG Member
- Posts: 220
- Joined: Sat Apr 19, 2014 12:16 am
- City: Newport Beach
- State: CA
Re: Power Wagon Fuel Economy
Without going out on a limb, I don't think Power Wagons have ever seen the inside of a wind tunnel....
Tom
1969 W100 383/435
1969 W100 383/435
- Drew63PW420
- Sweptline.ORG Member
- Posts: 17
- Joined: Mon Sep 19, 2016 9:56 am
- City: Sebastopol
- State: CA
- Location: Sebastopol, CA
Re: Power Wagon Fuel Economy
Hmmm, I'm new, and maybe I'm doing something wrong.
I have W200 (original 62000 miles) with 318 , stock 4 speed, don't know my gears, long tri-y headers from Stan's (Washington) new dual exhaust, stock 2 barrel, vintage Archer CDI. consistently getting 13-14mpg.
(just bought NV4500 with a 96 360 bell housing that will be going in in the next month.)
I have W200 (original 62000 miles) with 318 , stock 4 speed, don't know my gears, long tri-y headers from Stan's (Washington) new dual exhaust, stock 2 barrel, vintage Archer CDI. consistently getting 13-14mpg.
(just bought NV4500 with a 96 360 bell housing that will be going in in the next month.)
63 W200 318/420 service body
69 D300 318 dual dump
71 W200 383/A727/ Camper Spec.
69 D300 318 dual dump
71 W200 383/A727/ Camper Spec.
Re: Power Wagon Fuel Economy
If your gears are original to the truck, the ratio is listed on yourDrew63PW420 wrote:Hmmm, I'm new, and maybe I'm doing something wrong.
I have W200 (original 62000 miles) with 318 , stock 4 speed, don't know my gears, long tri-y headers from Stan's (Washington) new dual exhaust, stock 2 barrel, vintage Archer CDI. consistently getting 13-14mpg.
(just bought NV4500 with a 96 360 bell housing that will be going in in the next month.)
VIN tag in the door jamb.
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John
- Drew63PW420
- Sweptline.ORG Member
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- City: Sebastopol
- State: CA
- Location: Sebastopol, CA
Re: Power Wagon Fuel Economy
Word.
Looks like 4:10
:]
I'll check the milage again, too
I don't imagine I'm doing 40% bether than everybody else...
Looks like 4:10
:]
I'll check the milage again, too
I don't imagine I'm doing 40% bether than everybody else...
63 W200 318/420 service body
69 D300 318 dual dump
71 W200 383/A727/ Camper Spec.
69 D300 318 dual dump
71 W200 383/A727/ Camper Spec.
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- Sweptline.ORG Pioneer
- Posts: 7339
- Joined: Wed Dec 31, 1969 6:00 pm
- Location: Walnut Creek, CA
Re: Power Wagon Fuel Economy
If your speedometer is off, the odometer is also off and the MPG calc would be off.
- Drew63PW420
- Sweptline.ORG Member
- Posts: 17
- Joined: Mon Sep 19, 2016 9:56 am
- City: Sebastopol
- State: CA
- Location: Sebastopol, CA
Re: Power Wagon Fuel Economy
Currently using late Dodge 3/4 ton 8x17" wheels with E load range tires that are about 31.5"
Offset not right but I can back it off a taste to not rub--what the heck new tires and I had them already
The radar seems right on for speed, but I'm not a scientist like my dad. The truck came with 33s the speed was indeed a bit off...
Offset not right but I can back it off a taste to not rub--what the heck new tires and I had them already
The radar seems right on for speed, but I'm not a scientist like my dad. The truck came with 33s the speed was indeed a bit off...
63 W200 318/420 service body
69 D300 318 dual dump
71 W200 383/A727/ Camper Spec.
69 D300 318 dual dump
71 W200 383/A727/ Camper Spec.
Re: Power Wagon Fuel Economy
I have 2 questions. what's an A/F bung and what's an Archer CDI??
- riffraff
- Sweptline.ORG Member
- Posts: 220
- Joined: Sat Apr 19, 2014 12:16 am
- City: Newport Beach
- State: CA
Re: Power Wagon Fuel Economy
An A/F (air/fuel) bung, is simply a fitting welded into my exhaust, to allow the installation of a wide-band air/fuel sensor and monitor. In other words, I am not guessing so much about my fuel ratio. That I am only getting 7mph, is simply what the engine calls for. When I got my truck, it was at 9mph, and ran good. However, once I was able to check the mixture, I saw that it was dangerously lean at over 16:1 in some places. It had lived its entire life in a lot thinner air, at about 8000 feet, and now it is at sea-level.Kaegi wrote:I have 2 questions. what's an A/F bung and what's an Archer CDI??
I'm not familiar with the Archer brand, but a CDI ignition allows for a hotter, more precise, spark:
"CDI ignition is most widely used today on automotive and marine engines. A CDI module has "capacitor" storage of its own and sends a short high voltage (about 250+ volts) pulse through the coil. The coil now acts more like a transformer (instead of a storage inductor) and multiplies this voltage even higher. Modern CDI coils step up the voltage about 100:1. So, a typical 250v CDI module output is stepped up to over 25,000v output from the coil. The CDI output voltage of course can be higher. So you'll see CDI systems claiming coil output capability over 40,000-60,000 volts!!? As you will see this is not exactly what happens at the plug but for math purposes it works out. The huge advantage of CDI is the higher coil output and "hotter" spark. The spark duration is much shorter (about 10-12 microseconds) and accurate. This is better at high RPM but can be a problem for both starting and/or lean mixture/high compression situations. CDI systems can and do use "low" resistance coils."
http://www.jetav8r.com/Vision/Ignition/CDI.html
Tom
1969 W100 383/435
1969 W100 383/435
- swptln
- Sweptline.ORG Member
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Re: Power Wagon Fuel Economy
Archer CDI, holy crap....that is when Radio Shack used to make some cool stuff. It was actually a electronic kit you had to build yourself. Capacitive Discharge Ignition is basically an electronic ignition unit/system. The CDI box uses electronics to fire the coil vs using the points directly. So, the points become a trigger for the CDI box to fire the coil, reducing voltage and wear on the points/trigger and firing the coil at a higher secondary voltage 40,000-50,000 volts vs a regular point type ignition at 20,000-25,000 volts.
Not to be confused with an MSD box, not the same.
Not to be confused with an MSD box, not the same.
Mark D.
61-71 Dodge Truck Association
http://www.sweptlinesunlimited.com
1968 W200 Sweptline
1969 D100 Utiline
1993 D250 Club Cab
61-71 Dodge Truck Association
http://www.sweptlinesunlimited.com
1968 W200 Sweptline
1969 D100 Utiline
1993 D250 Club Cab