Author Topic: 6.7L Mods  (Read 4039 times)

Offline BradNTx

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6.7L Mods
« on: September 19, 2012, 08:37:29 PM »
My 07 6.7 truck has 153k miles on it, and the turbo just took a dump. The high EGTs from the factory DPF system are probably contributing to the early demise. I'm looking at doing a DPF delete kit and new turbo, but can't decide what to get. I'm not looking for a big power gain, so much as better mileage, and a DPF delete. Removing the DPF system should net 60 hp by itself, so tuning more than that is not my goal.

Exhaust is fairly easy. I want a 4", quiet exhaust for family trips with little change over factory sound levels. I was considering the AFE DPF delete package from turbo back and no muffler. Silverline makes a Quiet Tone muffler that should work too.

I start getting mixed feelings with turbo selection. I don't want a lot of lag or reduced low end throttle response. The Industrial Injection turbos require conversion to a 5.9L manifold, and a lot more added expense. That leaves either a Holset or Mopar turbo, which would be a slight upgrade over the current factory turbo, since there is a 4th release with better horsepower & boost for 2012.

EGR block kit is an easy selection- I like the H&S.

Tuners are not as easy a selection as I thought either. The H&S Mini Max is no longer available with a pyrometer. I don't want the cheesy stuck to the windshield suction cup tuner, but don't need anything killer fancy either. Well made and low maintenance with a pyrometer, and a few tuning selections. Recommendations?

Air intake- I'm looking at the AFE Pro Dry

I'll post pics when I make up my mind...
2007 2500 QC 6.7L
1977 RC 452 ci fi
2012 Ford Focus SEL (who'd a thunk it?)

Offline minionsram

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Re: 6.7L Mods
« Reply #1 on: September 20, 2012, 05:49:23 AM »
The best thing to lower your egt's is a water meth injection. A 4'' Down pipe would help with the temps as long as you dont start pooring the fuel to it. You surely need to get a Pyro on the dash of some sort. As far as electronics go Edge is one that a lot of people are buying but I really cant say anything for them because I have never delt with any computer mods on a diesel.
Still looking for that perfect dodge cummins truck

Offline scatpack_69

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Re: 6.7L Mods
« Reply #2 on: September 20, 2012, 11:45:16 AM »
Deleting is not going to increase power by 60hp. You'll see an improvement, but not that much.

Factory exhaust is 4", but has a cat in the downpipe, then another cat, then the DPF and muffler...not pretty.

You're mistaken that any Holset or Mopar turbo is an increase over stock; Holset makes the turbo, a replacement turbo is the exact same as the factory turbo, and a Mopar turbo is just a Holset with a nice chunk of change added on to it.

Now, as far as the 5.9 manifold being more difficult, not so. True, there is an added expense buying a 5.9 manifold, but the easiest way to change the turbo is removing it and the manifold together, and you have the EGR cooler that might as well go bye-bye at the same time, so really you're going to have time involved in taking all that stuff off just to get to the turbo and manifold in order to remove them...

My recommendation, do the full EGR delete. If you want to keep the exhaust brake, get a factory replacement turbo. If not, get something in the ballpark of a 64/71 on a 3rd gen 5.9 manifold and throw a little tuning at it and the 6.7 will spool it just fine. Tuning? EFILive, hands down. It truly is the best thing since sliced bread. And an Edge Insight for a gauge pack; very nice unit, easy to use, easy to mount. I have the gauge pod from Edge in my 03 that has a 6.7 swap, and it's real nice.

Exhaust, you can spend around $300 all the way up to $7-800. That's completely up to you and what you want.

The best way to reduce EGT is to let it breath; exhaust and a turbo in this situation will be far better than water/meth. And Edge doesn't do DPF delete anymore, you would have to find an older used Edge race (and even at that, there are better options).
2007 Ram 3500-Goerend-Hamilton-EFILive
2003 Ram 2500-HO 6.7/NV5600
1984 Ram W350-Crew/short-Cummins swap candidate

Offline BradNTx

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Re: 6.7L Mods
« Reply #3 on: September 29, 2012, 09:12:32 PM »
Install is complete. I went with the H&S Minimax, FloPro 4" turbo back exhaust, AFE air inlet, and the updated Mopar turbo. The exhaust is not louder, but is a little deeper in tone. It runs great, and mileage has already shown improvement. After 1/2 a tank of diesel, I'm at 19.5 mpg and have not driven it on the highway yet. I can't wait to take it on a road trip soon and see what it gets. Typical MPG on the country back roads was 15 - 16 MPG.
2007 2500 QC 6.7L
1977 RC 452 ci fi
2012 Ford Focus SEL (who'd a thunk it?)

Offline jungle

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Re: 6.7L Mods
« Reply #4 on: October 07, 2012, 05:20:38 AM »
Hi Brad
Hows your Awesome RC?
Jim
1988 RC W/  to be installed 1992 W250 CTD running gear

 

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