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post #1 of 9 (permalink) Old 11-11-2013, 11:04 AM Thread Starter
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Mpg computer

I am rebuilding a base model 97 dodge ram 2500 extended cab with 12 valve cummins, my question is if I get an upper console out of anouther 97 diesel will it plug In and work? Does it have to be out of a 97 or a diesel? Mine just has the cubby up top

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post #2 of 9 (permalink) Old 11-11-2013, 11:05 AM Thread Starter
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Also, anyone know any quick and easy ways to up fuel mileage, I am going on a 2000 mile trip soon and last time I only got 15 mpg
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post #3 of 9 (permalink) Old 11-11-2013, 01:37 PM
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There is one good way to improve your MPG. Drive slower. Were you driving 75 or 80 last time?

I have 3.54 gears. Driving my truck home I got 23.5 and 26 mpg. The previous owner said he got about 17. The only difference was driving style. I was driving at 54 mph and 1,500 rpm. When I was close to home I cranked up the speedometer to 70 mph and about 1,900 rpm. That got me about 18 mpg. Driving these trucks you either can have speed or mpg. Go fast and use more fuel or go slow and take more time.

You can try driving at different speeds. Perhaps driving 65 or 62 will net you better mpg than driving 67 or 70 would. For your best mpg 1,500 rpm is probably best unless you are loaded.

I am not sure that a factory mpg computer would work. However, one person said that a plug in OBD2 mpg gauge worked for them. It did however take some adjustments to have it give any useful readings. I am not sure if it ever read accurately or not.

1997 3500 club cab 3.54 gears towing & camper pkg. Still stock with a built transmission at 120k. 4" exhaust, 4kgsk, and exhaust brake waiting for installation. 37337 upgrade. Still need ideas for improvements for hauling 15k fifth wheel.

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post #4 of 9 (permalink) Old 11-11-2013, 01:50 PM
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The 12 valve does not have an engine control module. With no imput, a mpg calculator wouldn't work, so no '97 overhead readout would include mileage. Hand calculator or a stubby pencil & paper are your choices. Besides, in the vehicles I have owned with computers the mpg readouts were never correct anyway. Just a waste of electrons.

97 3500, 2 WD, G56, slightly bombed, 1.1 million miles, getting close to 1.2. Started the second million on 8/24/13
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post #5 of 9 (permalink) Old 11-11-2013, 04:58 PM
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Compass and temp. should work and be of more use.

98 2500 QCLB 4X4: G56 SIX SPEED: VALAIR DD CLUTCH: DANA 80 W/ 3.54 GEARS: 315/75-16 RUBBER: COLD AIR INTAKE: ADJ. BOOST ELBOW: 4K GSK: 60# VALVE SPRINGS: AFC MODDED #10 PLATE: HX35/40 HYBRID W/ 4" POWER ELBOW: 4" EXHAUST.
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post #6 of 9 (permalink) Old 11-11-2013, 05:13 PM
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thats all the Pre 98.5s had was Compass and Temp, No MPGs. my 98 has the over head display, and all i got is how cold, and which way.

The only way your going to be able to calculate MPGs is with your odometer and the diesel pump.

1998 2500 12V QCSB 4x4. Some Fuel, some air, built auto, yall know the deal. Under Construction. 11s here we come!

1998 3500 12V quad cab dually 2wd auto. 4" diamond eye, BHAF. Bone stock otherwise. Virgin pump and staying that way. no smoke
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post #7 of 9 (permalink) Old 11-12-2013, 05:48 PM
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Quote:
The only way your going to be able to calculate MPGs is with your odometer and the diesel pump.
or this FloScan Instrument Co. Inc.

Bill
'95 2500 4wd auto
'95 3500 5 speed heavy hauler
Stock for one day
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post #8 of 9 (permalink) Old 11-12-2013, 05:56 PM
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Only $1075

97 3500, 2 WD, G56, slightly bombed, 1.1 million miles, getting close to 1.2. Started the second million on 8/24/13
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post #9 of 9 (permalink) Old 11-27-2013, 09:55 AM
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My scangaugeii works well in my 96. Two fill ups and it has been pretty spot on. I hate that this auto likes to get better mpg at 1500 rpm cause I feel like that is lugging. My 24v gets the best mileage at 2200 rpm so this low rpm driving stuff is annoying. I usually end up going about 60-65 and getting 19 mpg.

2000 2500 QCLB NV4500. Valair DD. 3.55's. Exhaust brake. 4" TBE. BHAF. 7x.009's. Edge Comp. Dual lift pump. Isspro gauges. 180k
1999 3500 QCLB 47re. 4.10's. Quad Adr. FASS 150. 4"TBE. BHAF. 53 block. 230k
1996 2500 QCLB Built 47re. 3.55's. BHAF. DPS Manifold. Fluidamper. Isspro gauges. 275k
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