Over the years, GM has changed a lot regarding the turbos they use on Duramax engines. Not only have they changed manufacturers a handful of times but each RPO has its own unique measurements for key components. This can make it a headache when trying to track down exactly what the measurements of your stock turbo are. Luckily we've compiled this list of stock Duramax turbo specifications along with other helpful information so you can get a good idea of what you're already working with before you dive into the sea of turbo upgrades these trucks have to choose from. However, while some turbos may have the same peak power output, the size and shape of specific components can affect things such as exhaust gas temperature, drive pressure, and turbo efficiency range.
What's an RPO? Crucial Duramax Information!
This article will help you understand what an RPO is, how to find yours and when it will be needed. An RPO or Regular Production Option is a GM-specific code, made up of 3 characters, that helps the manufacturer specify what configuration of options has been or needs to be applied to a vehicle. This can include anything from paint color to powertrain options. For Chevy/GMC Duramax trucks each type of engine can be signified by a different RPO code.
520 RWHP TUNE ONLY LML DURAMAX:
The 2011 - 2016 LML Duramax came rated at 395 horsepower and 765 ft/lbs of torque. That seemed like an amazing amount of power when this model was first released but these days it is dwarfed by the available power of brand new trucks.
Furthermore, that whopping 395 HP is a peak power rating, meaning that you probably won't produce that much power during normal operations. In fact, many owners complain that the power delivery of the stock tune is too soft. This is why custom tuning is so important for the LML Duramax.
Here are some of the things tuning your LML can help with:
- Increased Peak Horse Power
- Improved Shift Quality
- LML Dead Pedal Resolution
Ever wonder what you need to push your stock truck to its limit? We know the answer, and we created this article for you. For 600-640 RWHP you will need to keep in mind all the supporting modifications you need to maintain reliability.
Custom tuning is going to ask your truck to perform at a higher level. The same goes for upgrading your turbo, transmission, fuel system or any other performance orientate component. The best way to maintain a moderate level of reliability while upgrading is to address these issues once and do it right!
Here is the list of what you need to make a reliable 600+ RWHP LML with a DPF still on it:
- EZ Lynk AutoAgent 2.0 w/ Support Pack & LSP5 Switch
- LML Stealth 64 Turbo
- 10mm Cp4 Exergy Stroker Pump
- DT550 Built Transmission
- S&B Intake
- Tie Rod Sleeves
- Traction Bars
- Fass 165 Lift Pump
- Beans Fuel Tank Sump Kit
- Edge Insight CTS2 Monitor
- EGT Probe
You use your truck for daily commuting or hauling the family and trailer for a long weekend of camping, you’re rolling up to your work or that campsite and you notice the LML go into regeneration (regen). You can’t keep driving as you should because you got a job to do or things to unpack. You can’t help but wonder what can be done to keep your LML from going into this cycle as often as it does, we’ll get into that in bit, first let’s look a little more at DPF regen.
The DPF takes essentially 700 miles or 18 hours of drive time to put it to the maximum values of normal calculated mass soot levels, which if you were curious is 44 grams. Active Regen describes the procedure your truck goes through to burn that accumulated soot. To do this, fuel is dosed through a 9th injector directly into your exhaust. Many drivers have noticed a drop in MPG and even potentially a lack of power during regen.
A popular theory is that if you go through regen less frequently, your MPGs will go up. So, how can you go through less regens?
We have lowered our MAP pricing on the Stealth 64 Turbo:
Calibrated Power, home of DuramaxTuner.com, has ramped up in-house production of the Stealth Turbo line. This added capacity and volume of turbo production has provided an opportunity to lower MAP pricing on all Duramax models and allowed the Cummins 5.9L Stealth 64 to be a low price and top quality leader in it's category.
Our Stealth 64 Turbo's are:
No need to delete emissions to make power!
Many people looking to make more power with a 2011 - 2016 LML Duramax think an aftermarket exhaust is required to make power. This is simply not true! Countless people reach over 500 RWHP with just the LML SPADE and a lift pump.
Above you can see the dyno graph from our DPF ON sled pull truck. Named #DTCleanSweep because this truck has "swept away" plenty of deleted trucks on the sled pull track. It sounds quiet, it runs clean, and it kicks some ass! This 2012 Duramax makes great power with the emissions equipment still working. While this truck has a few more upgrades than your normal street truck, it does definitely proves you can make power with the stock exhaust.
Keep in mind this truck came to us deleted, and was returned to stock. We had a chance to test it with both setups. Truth be told, the deleted version made less than 5% more power. Not enough to notice from the driver seat and obviously not enough to cost us anything at the track.
The most common myths about making power with an LML Duramax:
- "The DPF is going to fail"
- "Higher hp tunes will plug up the filter"
- "I deleted my truck and now I get better MPGs"
2011-2016 Durmax HP Recipe:
Your 2011 - 2016 GM Diesel is powered by the LML Duramax. This engine is capable on monstrous amounts of power while retaining some reliability, if you know what you are doing.
No, it's not just for drag racers and sled pullers. This level of power isn't even just for kids. 600HP is fun for the whole family. You can have a truck that is reliable and still capable of having a little fun when you want it to. That is why we put this simple list of 5 things you need to make 600HP and keep your truck on the road.
Here are some other articles about LML Performance:
2011-2016 Duramax/Allison Equipped Trucks:
If you have a 2011 - 2016 GM diesel pickup truck then you are familar with the Allison 1000 transmission. With that, you are familar with the strengths and weaknesses of the calibration, or tune that controls it.
While this model transmission has provided a great platform for smooth shifting and excellent towing, it's not without downfalls as well. list a few problems that the features will address.
Read More About LML Performance:
What are some good upgrades if you are towing?
You bought your 2011 - 2016 Silverado HD with a Duramax to tow something with it. It certainly is capable of performing well in completely stock trim. Your truck has plenty of power to pull anything up to it's rated Gross Vehicle Weight (GVW), it stops well and the ride quality is superb.
On the other hand, if you spend any length of time towing something you're bound to notice a few things that could be better. Furthermore, if you are towing for long distances, like a family vacation or for work, this LML Duramax engine has to be the most reliable vehicle you've ever owned.
COMMON QUESTIONS LML OWNERS ASK:
- What aftermarket products help with towing?
- How can you improve MPG while towing?
- Is the LML a reliable truck to tow something with?