5.9L or 6.7L? - Page 5 - DodgeTalk : Dodge Car Forums, Dodge Truck Forums and Ram Forums
View Poll Results: What Would You Prefer? (NOT WHAT YOU OWN!)
5.9L 211 77.57%
6.7L 61 22.43%
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#81 Old 07-22-2010, 12:35 PM
Polaris425
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Glad I read all this. I think my search for a 2500 CTD will continue until I find the right one.

'07 Ram 1500 Quad Cab 5.7 Hemi. RTC#349
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#82 Old 07-22-2010, 02:10 PM
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Unless you use your truck for hauling, like a travel trailer, Fifth wheel, or construction equipment, you will never recoop your investment on a diesel engine upgrade, compared with a gas powered truck. Gas and diesel are pretty close to the same price range today, but 10 plus years back, Diesel was always cheeper, sometimes being half the cost of gas. So that 6 to 10 K upgrade for your diesel engine is a lot of free gas for your gas powered truck. Do not get me wrong, I love my Ram Cummins, It pulls my #10,000 LB fiver, but if I only use a truck for tooling around, I would buy the gas unit.
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#83 Old 07-22-2010, 03:10 PM
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Originally Posted by MPFIREMAN View Post
Unless you use your truck for hauling, like a travel trailer, Fifth wheel, or construction equipment, you will never recoop your investment on a diesel engine upgrade, compared with a gas powered truck. Gas and diesel are pretty close to the same price range today, but 10 plus years back, Diesel was always cheeper, sometimes being half the cost of gas. So that 6 to 10 K upgrade for your diesel engine is a lot of free gas for your gas powered truck. Do not get me wrong, I love my Ram Cummins, It pulls my #10,000 LB fiver, but if I only use a truck for tooling around, I would buy the gas unit.
You get 3/4's of it back right away on trade. Ever priced a used CTD compared to a Hemi?

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#84 Old 07-22-2010, 03:14 PM
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^ Agreed... not to mention, what does it matter if I pay $0.10 more per gallon, if Im gonna get several more MPG's for that $0.10?? 19 mpg as opposed to 13 mpg is well worth $0.10/gal if you ask me.

'07 Ram 1500 Quad Cab 5.7 Hemi. RTC#349
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#85 Old 07-23-2010, 04:14 PM
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my hemi gets 18-19mpg and gas here is about 30c cheaper than diesel.

I know the new powerstrokes are about a 9k option. Not sure what the cummins is, but if its a 9k option, thats about 180 more a month that you are paying to own that truck.


i liked my diesel but my hemi is very cheap to run

2012 Ram 1500 Lone Star - Black
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#86 Old 07-23-2010, 04:31 PM
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more on the 6.7 to deal with than the EGR. you can't open the exhaust it has sensors in it for the computer. That controls the turbo
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#87 Old 07-23-2010, 04:58 PM
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Originally Posted by HemiMagnum View Post
my hemi gets 18-19mpg and gas here is about 30c cheaper than diesel.

I know the new powerstrokes are about a 9k option. Not sure what the cummins is, but if its a 9k option, thats about 180 more a month that you are paying to own that truck.


i liked my diesel but my hemi is very cheap to run
Not around town it doesn't... if so you need to share how. I know 2500 CTD's getting 18 in town........ My hemi gets 13, MAYBE 14 if im lucky.

And D-fuel here isnt that much more than mid-grade gas, which is what I run in the hemi. At one point there was only a $0.05 difference.

'07 Ram 1500 Quad Cab 5.7 Hemi. RTC#349
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#88 Old 07-30-2010, 08:17 AM
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Yeah but see my HEMI is custom tuned for 93 octane because of all the mods I have. So 30 cent less plus being at stock and having more TQ is a bonus to me.

2004 2wd Dodge Ram QC w/a 5.7 with Royal Purple 5w-20 in the motor, RP Max ATF in the trans, 80-90w in the 4.56 Auburn LSD rolling on American Racing Dale Earnhart "Tank" 24s wrapped in Pirelli 325/45/24s (36" tires)

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#89 Old 07-30-2010, 11:49 AM
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The DIC tells me I'm getting 18-19MPG around town and 24.5-26 MPG highway in my '06 Cummins. I know everyone says the DIC lies, but the DIC in my 8.1L Suburban says I'm getting 10MPG around town, and our previous Chrysler minivan said 14-15 MPG mixed driving.

Getting back to the subject of 5.9 vs 6.7, I think the 6.7 will eventually work through its' issues and overcome any shortcomings when compared to the 5.9.

It's funny....I'm sitting here trying to think of a personalized license plate for my '06, and I've thought of things like NO EGR, 5PT9, NO SMOG, etc, but I really don't think those statements will stand the test of time. Will probably be a non-issue just like the current musclecars.

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#90 Old 08-20-2010, 09:18 PM
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I've owned both a Hemi and a 5.9 Cummins. The Cummins is a slug off the line compared to the Hemi but once the Turbo spools up the cummins will set you back in your seat through every gear and leave the Hemi behind.....in a big cloud of smoke....and gets 20 mpg while doing it


p.s. Diesel fuel down the street from the house is $.03 more that REGULAR unleaded and has been that way for months. ( no, it's not red)


05' 2500 CTD 4x4
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#91 Old 12-31-2010, 11:13 PM
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I am currently looking for a 5.9 mega but they are hard to find. I have found a few 07 and 08 6.7s with 30-40k on them but was worried about the egr regen issues with as much around town driving that I will be doing. Is it really as simple as unplugging the EGR to help this and do you litterally "unplug" it?? Or should I continue the quest for a 5.9?
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#92 Old 01-17-2011, 09:22 AM
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I've had both an 05 ram with the 5.9, and the 07.5 that I have now with the 6.7. I put 60,000 on my 6.7 and the only problem I ever had was a bad oxygen sensor, which I bought one off of ebay for 30 bucks. I now have the H&S mini maxx with 5'' ss flo pro exhaust. Now I love the truck even more and I picked up 3 mpg bringing me to what my old 5.9 was getting. I average 17.5 to 18 mpg normal driving and on a trip I've hand calculated 22mpg so thats not bad at all. Hope I've helped someone in making thier tough decision between the two engines.

07 Brilliant Black 2500 Mega Cab Laramie loaded with all the options, 6.7L 6 spd auto.
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#93 Old 04-27-2011, 10:16 AM
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Quote:
Originally Posted by Emdog View Post
I am currently looking for a 5.9 mega but they are hard to find. I have found a few 07 and 08 6.7s with 30-40k on them but was worried about the egr regen issues with as much around town driving that I will be doing. Is it really as simple as unplugging the EGR to help this and do you litterally "unplug" it?? Or should I continue the quest for a 5.9?
Yes, unplugging it helps. You will get a CEL that is annoying to see everyday.

It helps a bit with mileage. Not as dramatic as deleting the EGR and DPF, but help nonetheless.

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#94 Old 05-23-2011, 09:15 PM
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I have had plenty of 5.9 and still have one
I also have my 6.7 and love the hell out of it
I'm glad I got a 6.7 and didn't listen o people that's said get another 5.9
Either wAy you can't go wrong
My choice would be another 6.7

2008 built 6.7 cummins to many mods around 800hp
2012 HEMI quad cab 3" drop with bags in back on 24s few other mods
07 Tahoe 3/5 drop on 22s Tuned
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#95 Old 09-22-2011, 08:37 AM
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There's a guy with a 6.7 on cumminsforums with over 450,000 miles on his truck. He uses it for hauling heavy loads basically daily. There is a big thread over there about it and he really has had very little problems with it.

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#96 Old 11-24-2011, 02:21 PM
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Quote:
Originally Posted by CDP6.7 View Post
That's hardly noticeable. What is noticeable is the light year difference in the 68RFE vs 48RE in stock form.
Can I put a new 6spd auto on my 5.9l?

Edit: The answer from my diesel tech was, "Well -- you could bolt it right on, sure, but the software differences would not let it work right." He then went on to suggest several upgrades from ATS that I could do to strengthen the 48RE.

I have:
2006 Dodge Ram 3500 SLT 4x4 Big Horn
Quad Cab Short Box, SRW
Mineral Grey exterior
Dark Grey interior
5.9L Cummins
High-Idle enabled
3.73 gears
Auto trans
17" chrome clad sneakers
Yaesu FT-8800 50 watt 2m / 70cm xceiver
Tow hitch
Jensen 9314 DVD Receiver
... and never enough time or money.

Mod Queue (no order):
Running lamps
Alinco DR-235T
Yaesu FT-897
Line-x
Headache Rack
External Fuel Tank
Engine mods to follow as I learn more ...

Last edited by Pscyclone; 12-01-2011 at 03:22 AM.
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#97 Old 08-15-2012, 06:16 PM
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Yeah the 68RFE will bolt right in, but there's no way to control it in a swap scenario. Some have tried the 545RFE PCS Standalone - it's a nightmare.

You could swap an Allison - it'd be easier but you're looking at $10,000-$12,000 installed. There's a reason I yanked my 68RFE and put a 47RE in. These things are awesome when upgraded.

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12.05 @ 111.89 mph, 8800 DA 7/25/12 Fuel only

EFI Live, ATS Twin CP3's, 250hp nozzles, Full billet ATS 47RE w/standalone, Aurora 6000 75/83/1.10 AR, T4 two piece manifold, H-11's, 5.9 intercooler, AFE Stage 2, 5" turbo back no muffler, AirDog 150 X 2, DiPricol gauges, plugged fuel valve, 20x10 black Eagle Alloys on 305/50/R20 Nitto 420's
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#98 Old 08-18-2012, 03:04 PM
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So far nothing's happened at all to make me regret getting the 6.7

2008 Ram 2500 4x4 automatic CTD

Armaguard boxliner, Bakflip Roll-X tonneau cover, LT285 70R17 Bridgestone Revo II ATs, Quaker State synthetic throughout

Gone but not forgotten:

2001 Ram 1500 Quad Cab 4x4, 5.9 automatic

LT285 75/R16 BF Goodrich All Terrains, K&N FIPK, Flowmaster Super 40 SI/DO rear exit, with chrome tips Edelbrock ceramic coated headers, SCT Tuner by Hemifever, Fastman 52mm, Harland Sharp 1.7 roller rockers, Remote starter/keyless entry, Kenwood deck & speakers, Lund tonneau cover, Line-X bedliner, Detroit Truetrac, Oasis rear differential cover, Tinted windows, Mag-Hytec transmission pan, Mag-hytec front differential cover, Mopar tow hooks, Mopar fog lights, Mopar valve covers, Castrol Syntec oil throughout, Bilstein 5100s, Taylor blue 8mm spark plug wires, Motive Gear 4.10s, Trans-Go shift kit


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#99 Old 09-26-2012, 10:26 PM
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Garage
We have both a 6.7 truck and 3 5.9 trucks...
They ALL have their good points and bad points and its all in what you want.

I will say in the short time my gal and I have owned the 6.7 truck it is growing on us real quick.

2005 Dodge Ram 2500 4x4 Quad Cab ...24v CR Cummins..Full Billet Auto...MITCHELLized

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XD Rockstars...Nitto Terra Grapplers 325/60/20...McGuard...Mag-Hytec...AFE...II Race Twins...II Injectors...II Twin Pumps...Colt Camshaft...Harland Sharp Rockers...NADP Heavy Hauler Full Billet Auto...PDI Ported Exhaust Manifold...Wilson Thrasher Intake... Custom 5"Stacks to 6" Miter Tops Exhaust...DiPricol & Autometer Gauges...Pioneer Audio...Kicker Amp...Polk Audio Speakers & Subs...Realm Audio Speakers...Kore Suspension...JTS Performance Viper Venom Cowl Hood....Bilstien 5100 Shocks...AD4G 250GPH...Custom Sump...Fuel System By Enterprise Engine Performance...Schaeffer Oil & Cenpeco Lubricants...Ladder Bars By East Coast Diesel ...Special Thanks to Ghost In The Machine Diesel Performance.....Fuel Only-930.01Hp/1590.94Tq & Nitrous-1182.20Hp/1989.33Tq.....February 2012 Diesel Power Magazine Feature Truck
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