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Old 12-18-2019, 10:48 PM   #1
lglidewell
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Default Diesel gurus - input needed

In the next month or two I will be buying my parents’ 2012 GMC Duramax, completely stock. They purchased it with 6400 miles and it currently has right at 57k miles. I would like to add a tuner without dropping a bunch of money removing/deleting parts. It will be used as a daily driver (around 50 miles round trip per day). I’d like to maximize mpg mostly.

So what’s the least intrusive upgrades I can do without dropping several $k’s doing a full blown delete?

Recommendations? Of things to replace as soon as I buy it?

Thanks in advance!
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Old 12-18-2019, 10:50 PM   #2
TacticalCowboy
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Buy a car
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Old 12-18-2019, 10:56 PM   #3
KyleW
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I have a Superchips tuner for my truck but it's a gasser. Not sure what all you'd have to add to make it a healthy engine, not familiar with the Duramax motors
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Old 12-18-2019, 11:04 PM   #4
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Quote:
Originally Posted by TacticalCowboy View Post
Buy a car
And a electric car at that you are only driving 50 miles a day
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Old 12-18-2019, 11:13 PM   #5
lglidewell
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Quote:
Originally Posted by pilar View Post
And a electric car at that you are only driving 50 miles a day
Quote:
Originally Posted by TacticalCowboy View Post
Buy a car
If I needed a car, I’d own one. Doubt it would pull a trailer or 5th wheel very well the dozen or so times I pull them each year.
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Old 12-18-2019, 11:14 PM   #6
str8ght
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Basic delete pipe and small tune. Less than 1k Drive it! Stay on top of maintenance. They are good trucks
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Old 12-18-2019, 11:46 PM   #7
Matt_g
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Solid rigs, besides the injector pump. At a minimum, I would recommend a Fass fuel system and a WCFab disaster Prevention kit as cheap insurance. If the Cp4 grenades, the entire fuel system has to be replaced which is about $10k.

The EPA pushed so much recently that many delete options are off of the market. We currently use CTT emissions intact tuning which leaves all of the factory exhaust/egr parts on the vehicle (and legal). We're fairly local to you and can help you out if you have any questions...

Also, look into the Cat fuel filter adapters, saves a ton of money over time!


Maxwell Competition Diesel in Brenham, Texas
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Old 12-18-2019, 11:50 PM   #8
asttbe
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Lift pump lift pump lift pump.

Then worry about a tuner
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Old 12-18-2019, 11:57 PM   #9
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Quote:
Originally Posted by lglidewell View Post
If I needed a car, I’d own one. Doubt it would pull a trailer or 5th wheel very well the dozen or so times I pull them each year.
Sorry to make you feel insulted
I would look at a BANKS DERRINGER https://youtu.be/560c5PvW9tk
It will keep you emission legal and also provide different tuning and power options to maximize mpg and then power
Best of luck in the new oil burner

Last edited by pilar; 12-19-2019 at 12:00 AM.
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Old 12-19-2019, 12:28 AM   #10
lglidewell
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Quote:
Originally Posted by pilar View Post
Sorry to make you feel insulted
I would look at a BANKS DERRINGER https://youtu.be/560c5PvW9tk
It will keep you emission legal and also provide different tuning and power options to maximize mpg and then power
Best of luck in the new oil burner
No apology needed sir, just a car wouldn’t suit my family’s lifestyle or needs. I will definitely look into everyone’s recommendations as I have zero knowledge in the diesel dept. my Tundra has been scooting along like a champ, but I have an opportunity to get into a newer truck for cheaper than I would be able to find!
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Old 12-19-2019, 05:45 AM   #11
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Leave it alone. You punk azzes amaze me

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Old 12-19-2019, 05:53 AM   #12
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Have a 2012 gmc purchased with 56k miles. At that time it just got out if the shop for def problems. I was averaging 13mpg all highway bone stock. It was in constant regen and dealer thought it was normal. Went with PPEI ezlynk with selection knob. Dropped stock exhaust, bolted up new exhaust and resonator, 20mpg.
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Old 12-19-2019, 07:13 AM   #13
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Quote:
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Buy a car
This... a Prius would get like 50 MPG
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Old 12-19-2019, 08:15 AM   #14
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Race pipe or full exhaust, do a full egr delete (don't just turn it off), small tune, and LIFT PUMP!! I don't care what everyone says about Allisons, they do not like much power over stock..
Just my 2 cents.
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Old 12-19-2019, 08:33 AM   #15
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I too vote leave it alone..Double check its Diesel and most are 100K warranty...not sure if theres a year limit...
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Old 12-19-2019, 08:40 AM   #16
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Leave it alone until you start having emission issues.......
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Old 12-19-2019, 09:02 AM   #17
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It's getting hard to find delete pipes and tunes. I've deleted the last 5 trucks i've owned. I would have suggested PPEI tunes with EZ Lynk and a Flo pro delete pipe, but can't get that stuff anymore as of a few months ago. I think PPEI only offers tunes that don't clear codes if you delete it, which is worthless. Don't listen to the advice above about tuning a truck and not taking the emissions off. You're just asking for problems if you do that.


Those Duramaxes get awesome mpg deleted.

Last edited by Arrowthreat; 12-19-2019 at 09:05 AM.
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Old 12-19-2019, 11:41 AM   #18
175gr7.62
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I would spend the money on durability upgrades, not chasing mpg's. Look at it this way, assume you spend $1500 and manage to get 3 mpg. Assume diesel is $2.65/gal and you drive 50 miles/day 6 days a week. Assume bone stock you get 15 mpg and after your upgrades you get 18 mpg. It will take you 3.27 years to see a return on your investment.

It almost never makes sense to spend money on mpg improvements, the payback period is just too long....unless you drive a crap ton of miles.
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Old 12-19-2019, 11:47 AM   #19
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I hear a LOT of good thing about the stealth tuners for non deleted trucks. No programming/flashing etc. plug and play for most trucks. There are some who will still delete and will sell the parts etc, they just dont advertise and its by word of mouth no days.

https://www.stealthmodules.com/
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Old 12-19-2019, 12:01 PM   #20
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Originally Posted by KDinTX View Post
I hear a LOT of good thing about the stealth tuners for non deleted trucks. No programming/flashing etc. plug and play for most trucks. There are some who will still delete and will sell the parts etc, they just dont advertise and its by word of mouth no days.

https://www.stealthmodules.com/
Less interested in power, more interested in MPG increase...anybody know if these help?
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Old 12-19-2019, 01:33 PM   #21
Dushon
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Originally Posted by Matt_g View Post
Solid rigs, besides the injector pump. At a minimum, I would recommend a Fass fuel system and a WCFab disaster Prevention kit as cheap insurance. If the Cp4 grenades, the entire fuel system has to be replaced which is about $10k.

The EPA pushed so much recently that many delete options are off of the market. We currently use CTT emissions intact tuning which leaves all of the factory exhaust/egr parts on the vehicle (and legal). We're fairly local to you and can help you out if you have any questions...

Also, look into the Cat fuel filter adapters, saves a ton of money over time!


Maxwell Competition Diesel in Brenham, Texas


Where’s yalls shop?


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Old 12-19-2019, 01:42 PM   #22
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It's been a few years since I did the math..But here's the jist of it..If you want it for more power,then go for it.
For fuel mileage it ain't worth it.If diesel prices stay somewhat similar to what they are,you'd have to drive it a half million miles to break even in fuel/vs the cost of the tune.I was looking at $1300 for the Banks,and install + exhaust..To get 20mpg out of my then new 6.7 Cummins..You have to break it down to pennies to get an accurate weigh.

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Old 12-19-2019, 02:08 PM   #23
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OP, the tuner is the bulk of your expense. So if you are buying one, might as well just spend an extra $100 or so for the pipe between the downpipe to the tail pipe. You don't have to run a +100hp tune, you can run stock power levels, and the tail pipe will still look stock. If tuned right, it will not blow black smoke.

If you drive good, you don't need to worry about getting in any trouble. It's the guys with more money then sense that are getting busted because they want to smoke out a Prius, or race their 3/4 ton truck like it's a Camaro.
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Old 12-19-2019, 03:12 PM   #24
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I'm with Matt and 175.


Protect the fuel system, maybe throw a cold air intake on and just drive it. I did the full delete and tune on my last truck and realized a whopping 1 - 1.5 mpg increase
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Old 12-19-2019, 03:17 PM   #25
Mike D
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Default Diesel gurus - input needed

Lee speaking from guy that knows a guy that owns a deleted diesel, I wouldn’t look at deletes. Many tuners are no longer selling them and the EPA is cracking down. I expect to see emissions testing on diesels in Texas in the near future.

There’s emissions intact tuning available that will do what you need.

Calibrated Power and CTT tuning are 2 that come to mind right off.

I wouldn’t bother with a box programmer, spend a little extra and get tunes like you want. I’d get one that can be changed on the fly.


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Old 12-19-2019, 03:21 PM   #26
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Keep it stock until the DEF system acts up and it’s not in warranty. Not sure on year limit on the warranty, but my 13 was in the shop 4 times with def issues. 5th time wasn’t under warranty got it deleted and tuned. Now I get 21mpg as well.


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Old 12-19-2019, 03:38 PM   #27
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The duramax I had was pre def but tuned via H&S. The truck would flat scream till it ran out of fuel. I added a pump and it was crazy what it would do with 35" tires. Had I not traded it off Im sure something would have blown up eventually but all the sportscar tears would have been worth it

and did average 23 mpg to alabama and back. hand calculated
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Old 12-19-2019, 05:16 PM   #28
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Try reaching out to Cody at Bare Knuckles Diesel in Haslet - (817) 721-7376. He really knows his stuff and has great tunes, exhaust, cold air, etc. options. Prices are great and customer service is outstanding.
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Old 12-19-2019, 07:24 PM   #29
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Quote:
Originally Posted by Quackerbox View Post
The duramax I had was pre def but tuned via H&S. The truck would flat scream till it ran out of fuel. I added a pump and it was crazy what it would do with 35" tires. Had I not traded it off Im sure something would have blown up eventually but all the sportscar tears would have been worth it

and did average 23 mpg to alabama and back. hand calculated
What year did you have. I have an 05 1 ton .

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Old 12-19-2019, 07:45 PM   #30
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What year did you have. I have an 05 1 ton .

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2009.

I still have the tuner but its vin locked. If you can find someone to unlock it you can have it

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Old 12-19-2019, 08:35 PM   #31
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Full delete and EFI live tuning!
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Old 12-19-2019, 08:38 PM   #32
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Full delete and efi live tow tune . I had to do it when my stupid dpf injector went out. Omg. It’s a new truck. I will always delete any diesel I own now.
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Old 12-19-2019, 08:40 PM   #33
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https://www.duramileage.com/Duramax-...r-p/ez1000.htm
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Old 12-19-2019, 10:46 PM   #34
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Where’s yalls shop?


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3493 FM 3456, near Salem Church
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Old 12-19-2019, 11:36 PM   #35
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2009.

I still have the tuner but its vin locked. If you can find someone to unlock it you can have it

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I don't believe it would work

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Old 12-20-2019, 07:18 AM   #36
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Lee speaking from guy that knows a guy that owns a deleted diesel, I wouldn’t look at deletes. Many tuners are no longer selling them and the EPA is cracking down. I expect to see emissions testing on diesels in Texas in the near future.

There’s emissions intact tuning available that will do what you need.

Calibrated Power and CTT tuning are 2 that come to mind right off.

I wouldn’t bother with a box programmer, spend a little extra and get tunes like you want. I’d get one that can be changed on the fly.


Sent from my iPhone using Tapatalk Pro
I cannot verify this is fact, but was told something interesting yesterday. Supposedly inspection stations in certain Texas counties have a device that plugs in the OBD2 port and will communicate with NOX sensors to verify emission control on diesel pick ups. Is this true?

Attachment 984765

Last edited by Radar; 01-10-2020 at 10:40 PM.
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Old 12-20-2019, 07:23 AM   #37
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You should leave it alone, you aren’t going to gain mileage. If you buy a big truck and want to drive it daily, you will have to open up your wallet.
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Old 12-20-2019, 07:35 AM   #38
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Full delete and EFI live tuning!
Only way!
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Old 12-20-2019, 09:06 AM   #39
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Originally Posted by Radar View Post
I cannot verify this is fact, but was told something interesting yesterday. Supposedly inspection stations in certain Texas counties have a device that plugs in the OBD2 port and will communicate with NOX sensors to verify emission control on diesel pick ups. Is this true?

Attachment 984765
It’s possible. That’s why many are going with intact tuning. It’s a lot similar to the VW scandal... If someone were to plug in a obd tool it would show everything functioning as it should from the factory, but in reality it’s showing default values. You will however still go through regenerations being the dpf remains on the truck.
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Old 12-24-2019, 09:42 AM   #40
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Talking to a couple people about doing deletes on my truck. Being that I live in Brazoria county, I’m concerned that they will require emissions testing on diesels in the not so distant future.

The inspection station I went to gave me a history lesson on catalytic converters. They have been around since 1975 and were standard equipment on most vehicles. However, they were required in 1981.

In his thought, if the epa requires emissions testing on diesel vehicles similar to what gas vehicles require now, it will have an effective date and that date forward of year model vehicle will require testing. Essentially grandfathering the years prior to the testing being mandatory.

It has sound logic... however, California has worked it differently.
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