97 12v best mileage - Dodge Cummins Diesel Forum
94-98 Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect...NO ADVERTISING

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post #1 of 50 (permalink) Old 02-18-2020, 12:10 AM Thread Starter
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97 12v best mileage

So I just bought a 97. 12v 5.9 and want to get good gas mileage and to boost the performance. Looking to see if I can put gauges to hyper mill and thinking of doing an intake and exhaust just would like some feed back please and thank you.


1997 ram 2500 club cab 155 wb hd. 12v 5.9 straight six. 2wd, automatic transmission.
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post #2 of 50 (permalink) Old 02-18-2020, 12:53 AM
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I think you should do all of it.

95 3500 auto, bhaf, 4k, kdp, gauges, air bags, fuel htr delete, 33"s, dually spacers, 4.10 lim slip, 2" level, silicone hoses, tps delete, tcc switch
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post #3 of 50 (permalink) Old 02-18-2020, 08:25 AM Thread Starter
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So for the hyper milling and the intake any suggestions? Can I put the gauges on a stock 12 valve?

1997 ram 2500 club cab 155 wb hd. 12v 5.9 straight six. 2wd, automatic transmission.
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post #4 of 50 (permalink) Old 02-18-2020, 09:40 AM
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There's not a great deal you can do to the intake that will make any difference on a stockish motor. A 4" exhaust will get you some gains though. Yea, you can put gauges on, assuming you're talking about the standard set (not sure what it being a 'stock motor' has anything to do with this?) A boost gauge at least if mileage is your concern. Fuel pressure is a good diagnostic tool but not terribly useful in normal driving. EGT (and trans temp, if an auto) not really needed on a stockish motor unless you're towing heavy. With that said you can get good deals on gauge packages (A 3-gauge pillar pod and 3 gauges), so that's a pretty common way to go.

Start reading through the beginner stickies. Most of these questions are answered there. Fill out your sig with some basic info (specifically discussing mileage, what transmission/rear end/tires would be helpful) which will help people answer your questions without having to ask more questions, too.

If you want to improve fuel mileage, slow down. The truck is an aerodynamic brick. I get ~21-22mpg @ 60 mph unloaded. That drops to maybe 17-18 @ 75 mph.

1997 2500 CCLB, NV4500, 3.54s. 389k on the clock. Just getting broke in.
I talk a lot of crap and sometimes it might sound like I know what I'm talking about. I do not.
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post #5 of 50 (permalink) Old 02-18-2020, 03:18 PM Thread Starter
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Thanks brother I will take a look at those stickies new to the diesel world so I appease the advice.

1997 ram 2500 club cab 155 wb hd. 12v 5.9 straight six. 2wd, automatic transmission.
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post #6 of 50 (permalink) Old 02-18-2020, 03:34 PM
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Do you have the 180hp auto or 215hp 5 spd? Spend the $$ on the exh. side. I used a PDR 35/40/14 turbo, 4", AFC spring kit, star wheel adjustment, 3k kit and #11 (custom ground by me) fuel plate on my 97 215hp 5spd. It was a rocket but I'd mod it differently if there's a next time. Craig

2012 CCLB 4wd dually,3.73,68rfe,Fass,BD IH and E-brake kits.2008 Sunnybrook30RKFS 5er.
If you take something apart and put it back together often enough, you will end up with two of them!
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post #7 of 50 (permalink) Old 02-18-2020, 04:12 PM Thread Starter
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Not looking to mod it out too much I would rather get better mileage while keeping my trans and engine happy I may do some little stuff to make it preform better but what you just posted might as well be in another language lol. I’ll have to look if it’s the 215 or not.

1997 ram 2500 club cab 155 wb hd. 12v 5.9 straight six. 2wd, automatic transmission.
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post #8 of 50 (permalink) Old 02-18-2020, 04:13 PM
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BFD - why would you mod it differently if it was a rocket?

R12 in the summer, Webasto in the winter; cassette tapes & SAE-20078 all year.
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post #9 of 50 (permalink) Old 02-18-2020, 08:33 PM
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Prior to installing gauges or doing any engine mods I removed the cat & muffler and installed a Walker from NAPA. I have the part number somewhere if you want it. I don't recall any increase in anything except noise.
Replacing my rotted out stock exhaust (with the flow through Walker muffler) with a 4 inch MBRP gave me no measurable gains in mileage, no decrease in EGTs and no extra measurable power. That was with some engine modifications. On a stock engine you are wasting your money if you remove a serviceable stock exhaust pipe. You might see some gains with replacing the stock cat and muffler with a flow through Walker muffler, but it will take years to see a return on the investment if you drive the typical 10,000 or less miles.

BTW, you don't measure gas mileage of a diesel engine.

97 3500, 2 WD, G56, slightly bombed, 1.3 million miles with un-additized diesel fuel. Started the second million on 8/24/13
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post #10 of 50 (permalink) Old 02-18-2020, 08:35 PM
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Quote:
Originally Posted by Dougie7 View Post
I’ll have to look if it’s the 215 or not.
Is it an automatic transmission or a 5 speed manual? 5 speeds came with a 215, autos with a 180.

97 3500, 2 WD, G56, slightly bombed, 1.3 million miles with un-additized diesel fuel. Started the second million on 8/24/13
If you are lucky enough to be in Texas, you are lucky enough.
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post #11 of 50 (permalink) Old 02-18-2020, 09:24 PM Thread Starter
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States 230 hp

1997 ram 2500 club cab 155 wb hd. 12v 5.9 straight six. 2wd, automatic transmission.
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post #12 of 50 (permalink) Old 02-18-2020, 09:52 PM
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Engine has been replaced or possibly lost kdp and put school bus timing gear housing on. Does the gear housing have a ford emblem?

1998 12v, 4x4, Club Cab, Carli, Thuren, BlueTop, Core 4x4, BD Diesel, PDD 5x.012, South Bend
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1998 P-Pumped 24v, 4x4, NV4500 swap
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