Good Sam Club Open Roads Forum: Retuning diesel motor for more torque and hp
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 > Retuning diesel motor for more torque and hp

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DSDP Don

Moorpark, Ca

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Joined: 04/09/2005

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Posted: 02/13/18 02:12pm Link  |  Quote  |  Print  |  Notify Moderator

"Gibsenca".....A lot of nay sayers on here. I chipped my 400 ISL with DIGI CR chip and increased HP by 50 HP (dyno). My mileage went up and my hill climbing improved dramatically.

Many are correct about the trans. Find out want your transmission torque rating is and tune accordingly. If they can electronically tune your engine with a computer flash, that's the best way to go.


Don & Mary
2014 Newmar Dutch Star 4018 - All Electric
Cummins 450ISL
2016 GMC Canyon 4WD Crew Cab


ppine

Northern Nevada

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Posted: 02/14/18 10:03am Link  |  Quote  |  Print  |  Notify Moderator

Start with a new air cleaner and 4 inch exhaust. You can tune for towing power. Some people pull on grades at too low RPMs. Diesels like 2,200 or a little more. When you have more air in and more air out you need to monitor temperature carefully of both the engines and trans.

What RPM range do you pull grades with?
If you are too aggressive with your tuning you can overheat the engine and/or the transmission which can lead to failure.

I get over 300 hp out of a Ford 7.3 from 2002 and it is enough. I have achieved 23.8 mpg on the flats empty with this set up.

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