Diesel Tuner's Blog

The History of the 5.9L Cummins

[fa icon="calendar'] Dec 16, 2019 10:08:04 AM / by Justin Tyson posted in Cummins, diesel performance

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The 5.9L Cummins engine has been regarded as revolutionary and has a ton of fans that backed it in its heyday. It's history is even more impressive, we're going to talk about the engine's run from 1989-2007. 

1989 - 1993 

The Cummins engine had been successful in agriculture implements for a few years prior, so in 1989 Cummins and Chrysler introduced the 12 valve as an alternative the the V8 gas powered Dodge.  It was a hit immediately for those that wanted double the torque and a better option for fuel economy.  These diesel powered trucks were introduced stock with a 160 horsepower rating.  The truck was very simple.  Between 1989-1991 they offered a non-intercooled, turbocharged, and a three-speed automatic transmission, as well as a five-speed manual transmission option. Interestingly it had a rotary style mechanical injection pump.  These were the reason the truck was fuel efficient, but also why the truck lacked power. Another interesting point is how the original injectors were bigger than the next variation which arrived in '91.5.  The updated 12 valve now came with smaller injectors, a larger turbocharger, Cummins would introduce an intercooler to the truck, and the automatic transmission now came equipped with overdrive.  

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Unveiling The New Cummins Aurora 5k Vortex Twin Kit

[fa icon="calendar'] Jun 5, 2018 12:00:00 PM / by Justin Tyson posted in Cummins, twin turbo, Diesel Turbo Options Cummins

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This has been years in the making for the engineers and development team over at ATS. They've put in the time and what you get out of it is a Cummins twin kit that truly gives your Ram a clean, powerful, stealthy ride.  This compound kit is what your 2013+ Cummins needs for all aspects, whether that may be towing, daily driving, or that long distance family trip you've been looking forward to.  Let's take a look at what this system has to offer. 

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The Cummins Stealth 64 Turbo: Towing, Daily Driving and Performance!

[fa icon="calendar'] Jun 7, 2017 11:00:00 AM / by Paul Wilson posted in Cummins, Cummins Turbo, Stealth 64, Stealth

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2003-2007 5.9L  DROP-IN CUMMINS TURBO:

After the extensive testing we did in the Cummins Turbo Shootout back in 2013 we learned a few things about Cummins single turbo systems.  This test featured 5 turbo's, recomended by the manufacturer, analyzed and compared side-by-side.  


If you read the article featured in Diesel Power Magazine or listened to the episodes we did at the Diesel Performance Podcast then you already know there was no clear 1 winner.  The reality of aftermarket turbo's is you have to sacrafice something to gain something.  So we set out to develop a turbo that could meet our requirements for being a great daily driver, good for managing EGT's while towing and something we could cause havok on the streets with.  

Cummins Stealth 64:

  • Great Daily Driver
  • Good for managing EGT's while towing
  • Cause havok on the streets!
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1,000HP Single Turbo Cummins Daily Driver

[fa icon="calendar'] Jun 1, 2017 9:40:51 AM / by Chris Ehmke posted in Cummins, Cummins Turbo, Cummins Tuning

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1000HP Daily driven Single turbo 5.9 Cummins


Generally the terms "budget" and "1000RWHP" are opposing descriptions.   This build ties the two together while utilizing the highest quality parts in the industry.   The owner, Mitch, who has owned this truck for some time has always envisioned a 4 digit street truck. 


If you have been around the Cummins performance community for any length of time you understand how amazing it is to make over 1,000HP on a single turbo setup that is still streetable.  Of course many people have made the power, but with a single turbo the big problem is spool-up and smoke output.  With Mitch's truck we dialed in a parts package and our custom tuning so he could have the best of everything with his truck.

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Ultimate Callout Challenge Truck Build! (6)

[fa icon="calendar'] May 19, 2017 1:15:00 PM / by Paul Wilson posted in Cummins, Cummins Diesel, 10.4L Cummins, Triple s500 turbos, UCC, Ulitmate Callout Challenge

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Ultimate Callout Challenge Truck Build! (5)

[fa icon="calendar'] May 8, 2017 8:54:00 AM / by Paul Wilson posted in Cummins, 10.4L Cummins, Triple s500 turbos, UCC, ISL

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We plan to put the entire build into a FREE E-Book which will be available by the end of June, 2017.  If you would like a copy just click the button below and fill out the corresponding form.  

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Ultimate Callout Challenge Truck Build (1)

[fa icon="calendar'] Feb 22, 2017 5:00:00 PM / by Paul Wilson posted in Cummins, 10.4L Cummins, Ultimated Callout Challenge, Triple s500 turbos

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Being the gluten's for punishment that we are, CPS has decided to test the old 'There's no replacement for displacement' adage on this 2011 Ram.

The truck is a 170K mile 2011 Cab and Chassis that we've used to develop our emissions equipped tuning. After reaching 505rwhp and putting the Aisin just about to its useful end we've decided to retire the 6.7L powerplant in favor of its big block counterpart.

Here she is before we initiate our shenanigans.



The Donor: A Freightline M2106 Business class will offer its heart for transplant.

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2016 Ram, Aisin, MM3 Tuning Review from Jim McNicoll

[fa icon="calendar'] Feb 6, 2017 2:00:00 PM / by Paul Wilson posted in Cummins, 2013 Cummins, 2015 Cummins, 2014 Cummins, Smarty MM3, new cummins tuning, MM3, 2016 Cummins, Aisin Tuning

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Many truck owners that have a Cummins powered Ram equipped with an Aisin transmission have inquired about transmission tuning and performance upgrades.  Although at this time Aisin transmission tuning is not available, we have had excellent results with the increased drive-ability of the trucks. 

Recently we worked with Jim McNicoll to tune his 2016 Ram equipped with a Aisin transmission with our Custom MM3 Tuning.  Below you will find his review of the tuning and the process. 

Other Articles about MM3 Tuning:

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MM3 Tuning Update: Public Release Notice

[fa icon="calendar'] Feb 1, 2017 10:34:04 AM / by Paul Wilson posted in Cummins, Best tuning for Cummins, 2013 Cummins, 2011 Cummins, 2015 Cummins, New Cummins, 2012 Cummins, 2014 Cummins, 2000 Cummins Tuning, 2001 Cummins Tuning, 2002 Cummins tuning, 1998.5 Cummins, 2003 Cummins Tuning, 2006 Cummins Tuning, Smarty MM3, 1999 Cummins, 2004 Cummins Tuning, 2005 Cummins Tuning, MM3, 2016 Cummins, CME Cummins

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68RFE Tuning

[fa icon="calendar'] Jan 20, 2017 1:00:00 PM / by Paul Wilson posted in Cummins, Smarty MM3, MM3, CME Cummins, 68RFE, Transmission Tuning, 68RFE Tuning

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What benefits come from 68RFE Tuning?


The 68RFE transmission provides some improvements over previous automatic transmissions matched with Cummins pickup trucks.  With 6 gears equipped to help with fuel mileage the new(er) transmission has some other improvements.  When these transmissions rolled out in 2007.5, they were the first diesel specific transmission developed by Chrysler.  Finally they had stepped up the filtration and moved away from bands being used internally.  All in an effort to extend service intervals, increase reliability,  and drive down maintenance cost.  The dual face torque converter clutch and integrated tow haul capability made the 68RFE a truly solid option for diesel truck owners.  

Other Articles About Cummins Tuning:

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