H&S Mini Maxx EGR, DPF delete

[HowardC]

I was thinking about ordering the H&S Mini Maxx and wondered if anyone has one of these, and if it is worth the money. I was also wondering what the pros and cons were to the EGR and DPF deleting. Hopefully increased fuel mileage was the main pro!! Are there any other programmers that would be better for my 2011????

 

[MChrist]

I don't know for sure what the gains are, if any. I assume there would be, but if you are going this route, perhaps doing some before/after hand calculations would be in order.
It would be very enlightening, I think.

 

[HBarlow]

It is tempting to remove all the federally mandated junk that causes soot issues but it is very doubtful you will see fuel mileage improvements.

Someone whose name we all know from TDR but who wishes to remain anonymous tried a delete kit on an otherwise factory standard engine and told me he saw no fuel mileage improvement at all, towing or empty.

 

[MChrist]

Harvey, do you know if this person just removed hardware, or did he also use a programmer to remove regenerations?
My guess is that hardware removal by itself wouldn't amount to much, if any change. But by eliminating the extra fuel used for regen... that's a different story.
Or, since the exhaust sensors wouldn't pick up the need for regens, it wouldn't call for it?? I just don't know.

 

[martion007]

Surely it has to help the fuel economy.

 

[jgoff]

i have a 2011 2500 4x4 big horn, that i bought in January of this year and did the full deletes and have the H&S mini max with the trans tune, i also removed the TV at the same time, the truck didnt have many miles on it when i did the work, but it absolutely made a difference in milage on my truck, 12 to 13 before and 16 to 17 now under the same driving conditions, of course if run hard it is right back to 14 mpg, i have 3500 mi on it since making the change and i am very satisfied with my truck, i dont think making this kind of a change is for everyone , i might be putting all the crap back on some day you never know, but for now it is great

 

[2Rowdy]

I gained approx. 2 to 2. 5 mpgs when I first did mine. I gone far enough now I really have to work to see those gains. Now if my full blown ATS transmission would show up and be installed I will back in business one more time.

 

[MChrist]

So has anybody seen gains by only removing hardware? Or is it the combination of hardware and programming?

 

[KLauber]

If you remove the hardware the ECM will detect a problem if you don't fool it with software, I think. ANyone?

 

[AH64ID]

The fuel mileage bump is a combo of hardware and tuning. The lack of hardware improves the combustion efficiency by using 100% clean air, and stops the fuel being dumped on the exhaust stroke during regen. The timing from tuning also improves the efficiency of the burn, resulting in another slight bump.

Depending on driving style the increase can be anywhere from slight to decent. If you spend a lot of time towing and heavy the gain won't be as large as your regens are shorter and less frequent, but all trucks should see a slight gain (unless your using the added power from the tuner all the time).

 

[firemansdiesel]

I deleted for (2) two full tanks w/ the Smarty Jr on SW Stock. Along w/ just the Down pipe back deletes. I gained 2-3mpg depending on my driving conditions. You will also notice alot of that lag is gone. Especially the G56 manual 2nd through 4th gears rowing.

So from my personal experience, is that just the hardware alone will get your mileage up (no more regens and EGR shut down). You can do the deletes and sims and not have to run a programmer, but live w/ the engine light (you will need a Smarty or H&S product to be code free).

 

[Cosmo]

If you guys want to see just how bad the EGR is for your truck, pull your MAP sensor out and take a look.

Check out this guy's photos - he's only got about 2000 miles. I cleaned mine last week and it was WAY worse - you couldn't actually see through it at all, it was completely filled with carbon and gunk. I have 64k on my truck, the first 42k (ish) it had the EGR and DPF present.
MAP Sensor cleaning: 6. 7L i6 Cummins Turbo Diesel - BruteForce


I have a Black Maxx with the fuel rail shim and deletes, and I can tell you that my fuel economy went up 3-4 mpg. Commuting to work (5 mi 75-80, 5-6 mi 35-50 with stoplights) and driving like an *** I usually get about 15mpg now. If I drive like a grandma, it's closer to 18-20.

 

[RDHamill]

I just did mine , the first time in 105,000 miles. It was almost completely plugged. I wonder if the soot build up has much effect on a pressure sensor ? I'll bet the inside of my intercooler is built up about the same.
If/When I do a delete, I'll get the intercooler hot tanked.

 

[AH64ID]

The intercooler won't be plugged as the soot/EGR is plumbed into the intake stream post IC.

 

[HBarlow]

Harvey, do you know if this person just removed hardware, or did he also use a programmer to remove regenerations?
My guess is that hardware removal by itself wouldn't amount to much, if any change. But by eliminating the extra fuel used for regen... that's a different story.
Or, since the exhaust sensors wouldn't pick up the need for regens, it wouldn't call for it?? I just don't know.

Sorry, I didn't see your post earlier or would have replied. We didn't discuss it with much detail but my understanding was that he used a programmer and eliminated the regen mode.

 

[CBlack]

Everyone I know (which is quite a few people) say that they go from 15-16mpg to 19-20 with the deletes done and a programmer.

 

[HBarlow]

Everyone I know (which is quite a few people) say that they go from 15-16mpg to 19-20 with the deletes done and a programmer.

Most owners shall we say, exaggerate about their fuel mileage. I could post here that my C&C gets 24 mpg at a steady 60 mph. Many would know I was lying. Some would believe it. Someone else would post, "mine gets 25 to 26. "

My '01 HO/six speed with 3. 54 gears could reach 19-20 mpg on the overhead. It was a 5. 9 rated at only 245 hp. The new ISB6. 7 with larger displacement and 105 additional horsepower, even stripped of all emissions crap, in a heavier truck is, IMO, unlikely to get fuel mileage that good.

The fuel mileage claims can never be proven in any scientific manner. I consider it a meaningless discussion.

 

[Beast2B]

I commute to work in my truck for many days in a row. If it isn't scientifically accurate, it's pretty close! Same stop for coffee, a couple of stop lights and the rest is 70mph cruise control freeway 65 miles round trip. I have hand calculated every drop of fuel put in the truck since I bought it with 60 miles on it. Up to 7000 miles I was 14. 2 to 14. 5 per tank. From the Smarty Jr til now, almost 1000 miles, I am at 16. 0 to 16. 8. I don't know if there's a 'learning curve' for the Smarty, but it is better with each tank so far.

NO mods to the truck besides the Smarty, even still running the original air filter!

 

[MChrist]

OK, that's the kind of results I like to see. . hand calculated, stock (except for Smarty), over a similar route over time. NOW, I'd like to see Smarty removed for one tank to see if the MPG gains came from Smarty, or just due to breaking in.
You up for it?