Diesel Tuner's Blog

Stock Duramax Turbo Specs and Information

[fa icon="calendar'] Jul 31, 2023 8:00:00 AM / by Ben Lawson posted in LLY, Duramax, LML, LBZ, Turbo, Stock Turbo, LB7, LMM, LB7 Turbo, LBZ Turbo, LMM Turbo, LML Turbo, Duramax Turbo, LLY Turbo, L5P, L5P Turbo

[fa icon="comment"] 0 Comments

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.  

Read More [fa icon="long-arrow-right"]

High Flow Vanes (HFVs) For Variable Geometry Turbos and Why You Need Them

[fa icon="calendar'] Dec 3, 2022 10:19:00 AM / by Ben Lawson posted in Turbo, Stealth, High EGT's, LML Turbo, Turbo Upgrades, Stealth VVT, Stealth 67G2, L5P, VGT, L5D, Nozzle Ring, High Flow Vanes, Turbo Vanes, HFV

[fa icon="comment"] 0 Comments

One of the biggest advancements in turbo design since we first started applying them to diesel engines over 70 years ago has been the invention of Variable Geometry Turbos. These turbos utilize a set of movable vanes on the inside of the exhaust housing that allows the actuator to vary the area in which exhaust gasses can pass through them. This allows the exhaust side of the turbo to increase or restrict the flow of exhaust hitting the turbine wheel. In some designs it also changes the flow direction of gasses hitting the exhaust turbine as you can see illustrated below. 


When restricted, the velocity of the exhaust gasses increases which helps spin the turbine faster than a fixed geometry turbo would. This gives the turbo the ability to spool the turbine and compressor wheel up much better than it normally would even with a low volume of exhaust pressure traveling through the system. This helps to spool the turbo at lower RPMs to create boost where it would normally be lacking. This is why variable geometry turbos (VGTs) are such an advancement. They have the ability to significantly reduce turbo lag and provide much better response and turbo efficiency across a range of RPMs. 

Read More [fa icon="long-arrow-right"]

Blow The Tires off Your L5P With These 4 Upgrades!

[fa icon="calendar'] Sep 5, 2022 3:30:00 PM / by Ben Lawson posted in Duramax Performance, Duramax Power, Turbo, TCM Tuning, L5P, L5P Tuning, Upgrades

[fa icon="comment"] 0 Comments

 

 

With the L5P being the newest Duramax engine on the scene it's also one of the best performing right out of the box. Making 400hp and 850 ft-lbs of torque when tested on our dyno. This iteration of the Duramax engine has been redesigned in all the right ways. From a thicker crank shaft, to a more advanced turbo, and pistons that can handle more load and heat than we've ever seen come in a stock Duramax engine before. Not only do we get improved performance but we also get an engine that can handle way more power than it left the factory with. Which means with bolt on upgrades alone you can raise the horsepower way beyond stock without having to do any upgrades to the internals of the engine. We've seen L5P's pushing up to 900ph on the stock internals. Even trucks still equipped with emissions systems can gain about 300hp and 500ft-lbs of torque with just a few bolt on upgrades. Today we will show you what upgrades you want on your L5P to make the biggest difference for the least about of money. So if maximum performance is what you’re looking to get out of your L5P this article is for you.

 

Here are the top four L5P upgrades!

  • Tune
  • Transmission
  • Turbo
  • Intake 

 

Tuning Options for L5P

Read More [fa icon="long-arrow-right"]

How VVT/VGT Turbochargers Work on Your Diesel

[fa icon="calendar'] Jul 24, 2021 9:30:00 AM / by Paul Wilson posted in Turbo, LB7 Turbo, LBZ Turbo, LML Turbo, Diesel Turbo Options Duramax, Duramax Turbo, LLY Turbo, VGT, VVT

[fa icon="comment"] 0 Comments

Turbocharging diesel engines is nothing new.  The most basic premise of a diesel engine is the more fuel and air you mix during compression, the more power you get. 

Types of turbocharger systems:
  • Wastegate Turbocharger
  • Fixed Vane Turbocharger
  • VVT/VGT Turbocharger
  • Compound Turbocharger 
  • Twin Turbocharger
  • Dual Scroll Turbocharger

NEED A NEW TURBO?

Between 1885 and 1916 a few patent applications were submitted for products that address the general concept of turbocharging, but it was in 1925 that Swiss Engineer Alfred Buchi put the first commercially available turbo on a 10 cylinder diesel engine.  Turbochargers use exhaust gas pressure to drive a Turbine Wheel that is connected to a Compressor Wheel. The compressor wheel forces cold air into your engine. You're using exhaust pressure to create boost pressure. 

Read More [fa icon="long-arrow-right"]

64MM Vs. 67MM Turbo: 3 Things To Consider Before Making Your Purchase

[fa icon="calendar'] Jul 1, 2019 10:49:08 AM / by Justin Tyson posted in Turbo, Stealth

[fa icon="comment"] 0 Comments

We all get there at one point, should I upgrade my turbocharger?  It's something us diesel owners come across.  Maybe your charger blew up or maybe you just want to help cool your truck's EGTs a bit more.  There are a ton of different reasons why we want to upgrade.  With that comes a ton of different variables that go into which turbo you SHOULD buy.  Let's take a look at three big things to consider. 

VVT Stealth 64-1

#1: How Do You Use Your Truck?

You've heard this one before, if you're new to the diesel world maybe you have not.  How do you use your truck?  Do you commute 20 miles to work and back daily?  Do you haul any toys?  Maybe you hotshot as a career, all these are some of the ways a driver uses his diesel truck.  A driver that tows a lot would best be suited for the Stealth 64, why?  It runs more efficiently at higher horsepower numbers while loaded.  The truck will sustain a heavy load for longer because the heat that the turbo is introducing is lower than a stock charger.  Lower piston temps, lower EGTs equals more time and a larger buffer before the truck is affected by the added heat.  

Read More [fa icon="long-arrow-right"]

Drop-In Turbo Option for LLY, LBZ and LMM

[fa icon="calendar'] Mar 7, 2017 1:00:00 PM / by Paul Wilson posted in LLY, LBZ, Turbo, Stealth 64, Stealth, LMM

[fa icon="comment"] 0 Comments


 

 

Duramax VVT Upgrades:

 

The 2004.5-2005 LLY was the first model Duramax to be equipped with a Variable Vane Turbo (VVT).  VVT  technology provides quicker spool-up, better EGT control, and better overall boost control.  This is also commonly referred to as a VGT or Variable Geometry Turbo. 

To understand the basics of a VVT or VGT technology take a look at this VIDEO on YouTube.

The stock Duramax VVT turbo from 2004.5 until 2010 is similar.  Slight changes to each model (LLY, LBZ and LMM) were made in compressor size, aspect ratio, blade profile and other features.  Despite these changes, you will find the same peak power potential of approximately 530 RWHP.  As a Duramax performance enthusiast this is probably just not enough power to keep your interest for long. 

There are many upgrade options on the market.  Deciding which one is the best for you can be tough.  An endless amount of forum threads and user stories makes it challenging to decipher fact from opinion.  

Stealth 64 Turbo Product Links:

Read More [fa icon="long-arrow-right"]

6 Things To Know Before Upgrading Your Duramax Turbo!

[fa icon="calendar'] Sep 9, 2016 10:00:00 AM / by Paul Wilson posted in Duramax Performance, LLY, duramaxtuner, LML, LBZ, Turbo, Stock Turbo, Stealth 64, Turbo Wheel, LB7, Stealth

[fa icon="comment"] 0 Comments


Stock Duramax Turbo Upgrades!

Duramax owners are generally proud of how their stock turbos perform.  They spool quickly, run hard and are capable of over 500 RWHP (once you tune it and make a few supporting modifications to handle the power).  However, after driving your truck around 520 RWHP for a while, the addiction will creep in and you may find yourself shopping for more power.  We all do it!  For some, it may not even be about more power, it may be about EGT control under load, or it may just be the factory turbo had an issue and needs to be replaced.  If you are anything like me, you will not want to replace it with the factory components if there is an upgraded, after market, charger available. 

 


Read More [fa icon="long-arrow-right"]

Drop-In Duramax Turbo Options

[fa icon="calendar'] Sep 7, 2016 2:17:28 PM / by Paul Wilson posted in Duramax Performance, Duramax, Duramax Power, 2013, 2014, 2016, 2011, 2015, LML, How to program my LML, More Power for my LML?, what are some upgrades I can go to my LML?, Turbo, 2012, LML Tuning, LML Power, Stock, Stock Turbo, Stealth 64, 2017, Stealth

[fa icon="comment"] 0 Comments


Drop-In Duramax Turbo Options

In the old days, there was no such thing as a "drop-in" turbo.  You pretty much had to buy a turbo that was designed for a different application and convert it to run on your Duramax.  Meaning the requirements for installation included several custom fabricated pieces to make it work.  

As technology in the diesel performance industry has advanced, our options for parts have expanded.  No longer do we have to use semi turbo's and roal coal to make power.  Now with the common rail injection system and variable vane turbo advancements there is a real need to find a turbo that makes more power than stock, while retaining all the benefits of a stock turbo. 

Benefits of a stock turbo:

  • Quick Spooling 
  • Clean installation
  • Reliable
  • Serviceable by any dealer or reputable shop
  • Requires no custom fabrication

Download Duramax Turbo Specifications

However, they do lack peak power, and peak power matters!  When looking for which upgraded unit to replace the stock turbo, we recommend matching the replacement as close as possible to the desired power level to minimize compromising drive-ability.  Any extra capacity you buy in peak for performance will cost you low end response.  Example: Looking to make 650rwhp? Buy a turbo that can just barely squeak out 650rwhp, do not buy something that's good for 850rwhp because it will drive poorly a light load. 

Read More [fa icon="long-arrow-right"]

How much boost should my stock Duramax turbo make?

[fa icon="calendar'] Jul 28, 2016 11:45:05 AM / by Paul Wilson posted in Duramax, Turbo, Stock, Stock Turbo, Drop-In, Stealth 64, Wheel Size, Turbo Wheel, Stealth

[fa icon="comment"] 0 Comments


Duramax engines have always come with solid turbos. However after miles and miles of whistling and boosting, your turbo may have problems. Or you may have other issues, that make you think your turbo has problems. This is very common as most drivers watch boost, keeping an eye on how much PSI they're making. It stands to reason that if your peak boost drops, your turbo has a problem. This is usually not the case though. More often then not, when we diagnose this symptom we find there are other problems leading to a lower than expected boost number. 

Target boost numbers for the following RPO's are as follows (PSI)

2001-2004 LB7- Stock 20-22, tuned 24-26, tuned with PPE boost valve 28-31.  Failure will occur near 34psi

2004.5-2016 Stock 22-24, Mild tune 27-28, Hot tune 33-35

The factory map sensor which electronically measures boost on a 2001-2004.5 trucks only reads to 22-24 psi, 2006-2016 MAP sensors read to 37 psi.  If you want to read boost numbers higher you'll need an aftermarket gauge. 

Stealth Boost Tester

 

Read More [fa icon="long-arrow-right"]

What you need to know about Boost Testing your truck!

[fa icon="calendar'] May 6, 2016 9:00:00 AM / by Paul Wilson posted in Duramax Performance, duramaxtuner, Duramax, Duramax Power, Charged Air System, Boost Leak, intercooler, Trouble Shooting Duramax, Boost, Turbo, Boost Test

[fa icon="comment"] 0 Comments

So many truck come into our shop with high EGT's, turbo lag, excessive smoke output, and bad fuel mileage which are all symptoms of a boost leak. It is so common to devlop boost leak that we now require all trucks to have a boost test done prior to strapping them down on the dyno. What's funny, is that no one shows up knowing they had a boost leak. The reality is that even if you can hit peak boost, you may have a leak, especially if you have a variable vane turbo. Variable vane turbos will change vane position and other operations to try and achieve a desired boost number which may cover up a leak in the charged air system. 

 

 

 

 

 

Read More [fa icon="long-arrow-right"]

Subscribe to Email Updates

Lists by Topic

see all

Posts by Topic

see all

Recent Posts