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Old 12-16-2016, 05:05 PM   #21 (permalink)
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Location: Tennessee
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Silver - '15 Mazda CX-5 Sport
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90 day: 37.23 mpg (US)
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I resoldered some pins and made an additional ground for the cluster. Then I climbed underneath and cleaned and reseated the speed sender at the tranny and bingo I have consistant speedo and odo function again. I've just got one headlight to fix and the aircon goes to zero pressure when the compressor comes on as repairs other than painting.

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Mirror deletes, 80% grill blocks, wheel covers, 50 psi tires = 6% better MPG avg. over a year. Wheel skirts overcoming ethanol winter fuel mpg losses and more!
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Old 12-20-2016, 11:37 AM   #22 (permalink)
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Join Date: Apr 2011
Location: Tacoma WA
Posts: 1,152

Woody - '96 Dodge Ram 2500 SLT
Team Cummins
90 day: 23.82 mpg (US)

Avion and Woody - '96 Dodge/Avion Ram 2500/5th wheel combo
90 day: 15.1 mpg (US)

TD eye eye eye - '03 Volkswagen Beetle GLS
90 day: 49.05 mpg (US)
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The diesel beetle assists the Ram 1 ton truck:


Went in there easily with an engine hoist.
Much more fun getting it out with a truck mounted crane. I met the overhauler half way.



Shiny new overhaul late transmission.
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1996 Dodge 2500 Cummins Turbodiesel
Custom cab, auto, 3.55 gears
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slowmover (12-31-2016)
Old 12-20-2016, 01:33 PM   #23 (permalink)
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Join Date: Dec 2014
Location: Butte, Montana
Posts: 318

little jona - '91 Dodge D 250 first gen cummins LE
Team Streamliner
Last 3: 24.65 mpg (US)

Little Jona airo modded - '91 Dodge RAM 3/4 TON D 250 24 AUTO
Pickups
Team Cummins
90 day: 22.62 mpg (US)
Thanks: 100
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What is the new and old rpms @60mph? 1)gear chang 2) trans swap?
---port match the ehxsost manafulld on both sides .
Wrap it ... I used the extra thick wrap 1.5 rolls for man +hot side ehxsost...
Exhaust Heat Wrap
And T3 Turbo Blanket..
Have the man. hot tanked (to de rust) and 2000+ ceramic paint.
This dropped my under hood temps to under 200 can stop at the top of a 7mile grade pulling 1000f EGT(wide open ) pop the hood and hold on to the man. With out 3rd degree burns. The wrap reduced my 1psi point by 100 (from 600 to 500 ) = more efficient turbo. This drop was an across the bord shift.

---
kafer65. I make the same recommended ehxsost mods for you...

Keep the after cooler. Add a late 1st gen inter cooler/ radiator (early 1st gen too small for intercoolers per dodge/ cummins) put the aftercooler on a separate radiator ( stock is engine coolent180 intake charge =15% reduction in power from un burned fule per Cummings )my late has 15% smaller injectors and the same 160hp /400tq only difference is injectors and IC Vs aftercooler
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1st gen cummins 91.5 dodge d250 ,16cm turbo housing exost manafulld wrap, Aero Cap
best tank: distance 649gps mi 24.04 mpg27.011
Best mpg : 29.3mpg 97mi 3.311usg 7/27/16



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skyking (12-20-2016)
Old 12-20-2016, 01:35 PM   #24 (permalink)
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Join Date: Apr 2011
Location: Tacoma WA
Posts: 1,152

Woody - '96 Dodge Ram 2500 SLT
Team Cummins
90 day: 23.82 mpg (US)

Avion and Woody - '96 Dodge/Avion Ram 2500/5th wheel combo
90 day: 15.1 mpg (US)

TD eye eye eye - '03 Volkswagen Beetle GLS
90 day: 49.05 mpg (US)
Thanks: 433
Thanked 416 Times in 265 Posts
where did you source the paint?
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1996 Dodge 2500 Cummins Turbodiesel
Custom cab, auto, 3.55 gears
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Old 12-20-2016, 02:40 PM   #25 (permalink)
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Join Date: Dec 2014
Location: Butte, Montana
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little jona - '91 Dodge D 250 first gen cummins LE
Team Streamliner
Last 3: 24.65 mpg (US)

Little Jona airo modded - '91 Dodge RAM 3/4 TON D 250 24 AUTO
Pickups
Team Cummins
90 day: 22.62 mpg (US)
Thanks: 100
Thanked 171 Times in 113 Posts
Napa in Castle Rock, wa
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1st gen cummins 91.5 dodge d250 ,16cm turbo housing exost manafulld wrap, Aero Cap
best tank: distance 649gps mi 24.04 mpg27.011
Best mpg : 29.3mpg 97mi 3.311usg 7/27/16



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Old 12-20-2016, 05:56 PM   #26 (permalink)
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Join Date: Apr 2009
Location: Ozark, Missouri
Posts: 57

White Lightning - '05 FORD FOCUS SE ZX4
90 day: 29.69 mpg (US)

Rental Car - '16 NISSAN VERSA SV
90 day: 41.74 mpg (US)
Thanks: 15
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You might look in the archives of Diesel Power Magazine, I remember reading an article about a 1st Gen Cummins that they purposely did all the work to make it more fuel efficient, and if I remember right, it was a stick shift and a dually at that but they took part of the duals off and used masking tape to tape the wheels smooth, I will see if I can find that article and hopefully post a link!
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Old 12-20-2016, 05:59 PM   #27 (permalink)
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Join Date: Apr 2009
Location: Ozark, Missouri
Posts: 57

White Lightning - '05 FORD FOCUS SE ZX4
90 day: 29.69 mpg (US)

Rental Car - '16 NISSAN VERSA SV
90 day: 41.74 mpg (US)
Thanks: 15
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Well I just tried a google search and about 5 links down I found this!!!

5,000 pound diesel, 26mpg at 65mph
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Old 12-20-2016, 09:03 PM   #28 (permalink)
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Join Date: Apr 2011
Location: Tacoma WA
Posts: 1,152

Woody - '96 Dodge Ram 2500 SLT
Team Cummins
90 day: 23.82 mpg (US)

Avion and Woody - '96 Dodge/Avion Ram 2500/5th wheel combo
90 day: 15.1 mpg (US)

TD eye eye eye - '03 Volkswagen Beetle GLS
90 day: 49.05 mpg (US)
Thanks: 433
Thanked 416 Times in 265 Posts
With the new gears it was ~60 MPH at ~1750 RPM.
The OD ratio went from 0.79 to 0.74
This is a change of roughly 6.25%
This brings it down to ~1640 RPM
I use the ~ because the tachometers on these things are not precision instruments
So now I am below the peak torque of the standard cam.
I have a call in to the cam manufacturer to see what they say about peak torque.
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1996 Dodge 2500 Cummins Turbodiesel
Custom cab, auto, 3.55 gears
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Old 12-20-2016, 10:34 PM   #29 (permalink)
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Join Date: Dec 2014
Location: Butte, Montana
Posts: 318

little jona - '91 Dodge D 250 first gen cummins LE
Team Streamliner
Last 3: 24.65 mpg (US)

Little Jona airo modded - '91 Dodge RAM 3/4 TON D 250 24 AUTO
Pickups
Team Cummins
90 day: 22.62 mpg (US)
Thanks: 100
Thanked 171 Times in 113 Posts
Color me surprised..
07=1600 peek tork 24v 5.9
07.5=1500 peek tork 6.7
With your larger 33.83" tires vs31.73"
Taller gears 3.72/3.42 vs 3.55
Your spun up tighter 1750/1640 vs 1605 ( calculated including 5% extra for no lockup)
The difference is a.79/.74 vs .69 OD in the late 1st gen (91.5-93).
In my opinion your 1640 is perfect for 60mph. As the engine boogs down/lusing rpm the tork gos upto peek. Seeing as you are building a tow truck insted of a mileage monster. For me its 65mph that allows this drop to peek.
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1st gen cummins 91.5 dodge d250 ,16cm turbo housing exost manafulld wrap, Aero Cap
best tank: distance 649gps mi 24.04 mpg27.011
Best mpg : 29.3mpg 97mi 3.311usg 7/27/16



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Old 12-20-2016, 10:37 PM   #30 (permalink)
Master EcoModder
 
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Join Date: Apr 2011
Location: Tacoma WA
Posts: 1,152

Woody - '96 Dodge Ram 2500 SLT
Team Cummins
90 day: 23.82 mpg (US)

Avion and Woody - '96 Dodge/Avion Ram 2500/5th wheel combo
90 day: 15.1 mpg (US)

TD eye eye eye - '03 Volkswagen Beetle GLS
90 day: 49.05 mpg (US)
Thanks: 433
Thanked 416 Times in 265 Posts
I run 30~31" tires 99% of the time.
I will be doing aero mods so a 65 MPH cruise will be do-able.

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1996 Dodge 2500 Cummins Turbodiesel
Custom cab, auto, 3.55 gears
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