I have a 2017 Newmar motorhome with the cummins B6.7 engine rated at 340HP with the Allison 2500 transmission. Will your system safely work on my MH and what performance improvements may I expect?
Also what would be the cost to me and will I be able to do the install myself? Don't know the engine #.
Thank you ( Howard Kelly, 08/11/2020 )
Your engine serial # is 74079343, for future reference. This tuner would work very well with your application. The major limiting factor for power gains is the 2500MH transmission. The tuner is the only power-adder on the market that will create a safe tune to use with that transmission but still net noticeable gains. The installation is very simple and would not require taking to a shop.
Just wanted to make sure this would work for my Cummins ISX12 500RV - I have a 2015 American Coach Tradition on a Freightliner IFS chassis. And if so, what should I expect. Thank you. ( DAVID DOBBERSTEIN, 07/16/2020 )
Yes, the tuner would work for your application. Gains on that engine would be approximately 75 horsepower and 250 lb.-ft. torque.
Good Day - I have a 2015 Tiffin Allegro Bus 37AP with the Cummins ISL9 450 engine. My records show a ESN # 73755249 (built 16 October 2014) but I cant locate the actual stamping on the engine. Can You verify the PDI unit will work for this engine and what kind of improvements I may see.

Thanks - Mark T. ( Mark Tallent, 04/20/2020 )

Yes the PDI Performance Tuner will work on your model. Gains would be approximately 70 horsepower and 150 lb-ft torque to the rear wheels.

Just bought a 2019 Renegade Verona LE with a Cummins L9 diesel. The manufacturer has rated the motor at 350 hp & 1000 fp torque. Another manufacturer (Dynamax) has the same motor and yet their ratings are 400 hp and 1150 fp torque. Renegade says that they have the Cummins de-tuned to extend the life of the motor. The Cummins brochure has ratings all the way to 450 hp & 1250 fp torque for the L9 motor. Does this make sense to you? Will upping the hp & torque really hurt the motor long term? I just don't want to go up steep hills like a turtle. Help.
The Cummins Engine No. is 74336637, ( Kim Wardle, 03/17/2020 )
It really just comes down to how the OEM specs the chassis. The only Dynamax model I see that features the 450/1250 rating is the DynaQuest XL on the Freightliner M2 112 chassis platform. The other two models, the DX3 and Force HD feature the 350/1000 rating on the Freightliner M2 106 chassis platform. I show that your VIN is the M2 106 chassis platform which may be the reason for the lower power rating. I do not know for sure, but I think the 450/1250 does have a different turbocharger, fuel injectors, tuning and possibly some other hard parts. We can still bump your 350/1000 up to 400/1150 with this tuner and I wouldn't be at all concerned with the added power being a reliability issue.