Retuning diesel motor for more torque and hp

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.

"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.

Tom/Barb wrote:
Call banks Power, they are the experts

X2, before you consider selling and going in to debt. Banks can tell you if what you need is possible.

The Maxx Force 7 was released with four settings for HP and Torque. International must give a code to allow a tech to reprogram. International refuses to provide the codes. So it really is a moot point. It is frustrating since the Workhorse chassis is capable handling more and the Allison Trans in as well. But for whatever reason International won't release the codes. So we will likely just start looking at selling this one and getting something else.

I got a diablo tuner for my 5.9 cummins dually and wanted the tuner for better fuel milage when the computer was retuned for economy I gained a extra 50 horsepower I asked the techs how could I get better milage by increasing horsepower, the reply was because our tuner tunes the engine better so better economy and a plus of more H P . now days the people who make a living pulling goose necks want the trucks E G R and D E F deleted cools engine better and provides cleaner oil but it defeats emissions

discovery4us wrote:
I don't. Cummins tech told me 15% increase in power but will see a 15% loss in mpg. Currently average 10 MPG so losing 1.5 MPG wouldn't be the end of the world and may not even lose that.

If that is Cummins program I wouldn't use it, get an after market.

Or put the Cummins program in it for free and see what it really does. If you don't like it have it taken out and re-fitted with the program you have now or a better one.

Tom/Barb wrote:

discovery4us wrote:
Are you looking at a aftermarket tuner or flashing the stock computer? Big difference between the two.

Many computers are set differently for different motors based on what each individual manufacturer wants at that time. Example, my DP has a 5.9 cummins at 275hp and 660ft.lbs. but the same motor was offered in the following years with 300 and then 325 hp. and around 890 ft. lbs. torque. Cummins service for a fee will reflash my computer to give me the 325 hp. and 890 ft. lbs. but I haven't convinced myself it is worth the fee. Loss of mpg and a little more stress on components, not sure it outways going up the hills faster.

How do you know you will loose fuel milage, Our coach gained mileage over all, and horse power at the top end.

Our programmer runs about 9=12 pounds of boost, and about 1000-1200 EGT. that is on level ground at 60-65 mph.

I don't. Cummins tech told me 15% increase in power but will see a 15% loss in mpg. Currently average 10 MPG so losing 1.5 MPG wouldn't be the end of the world and may not even lose that.

discovery4us wrote:
Are you looking at a aftermarket tuner or flashing the stock computer? Big difference between the two.

Many computers are set differently for different motors based on what each individual manufacturer wants at that time. Example, my DP has a 5.9 cummins at 275hp and 660ft.lbs. but the same motor was offered in the following years with 300 and then 325 hp. and around 890 ft. lbs. torque. Cummins service for a fee will reflash my computer to give me the 325 hp. and 890 ft. lbs. but I haven't convinced myself it is worth the fee. Loss of mpg and a little more stress on components, not sure it outways going up the hills faster.

How do you know you will loose fuel milage, Our coach gained mileage over all, and horse power at the top end.

Our programmer runs about 9=12 pounds of boost, and about 1000-1200 EGT. that is on level ground at 60-65 mph.

Are you looking at a aftermarket tuner or flashing the stock computer? Big difference between the two.

Many computers are set differently for different motors based on what each individual manufacturer wants at that time. Example, my DP has a 5.9 cummins at 275hp and 660ft.lbs. but the same motor was offered in the following years with 300 and then 325 hp. and around 890 ft. lbs. torque. Cummins service for a fee will reflash my computer to give me the 325 hp. and 890 ft. lbs. but I haven't convinced myself it is worth the fee. Loss of mpg and a little more stress on components, not sure it outways going up the hills faster.

MrWizard wrote:
tune up requires more than a 'chip'
often requires new injectors, more turbo boost etc..

There is a lot that can be done with out doing all that. most injectors do not pump at full capacity the electronic injectors can be held open longer or shorter as required to gain what you need.

Mechanical pumps are history.