Custom tunes at Altitude

[travisunderwood]

Originally Posted by cleatus12r

Close enough, Jack.

But the 7.3L doesn't use a Mass Air Flow Sensor.

For all intents and purposes, an 80HP tune is going to add a lot of fuel above stock and there is simply not enough air density to support that much fuel while towing.

I would suggest a lower HP towing tune.

Makes sense. I don't tow that much, so 80 daily had been planned as my primary - and the one I have been using. 80 Tow looks like a smoke show, only tried it once. What tune should I go with to maximize MPG - that is my end goal is maximizing MPG over stock, not looking for best performance.

[cleatus12r]

Originally Posted by travisunderwood

Makes sense. I don't tow that much, so 80 daily had been planned as my primary - and the one I have been using. 80 Tow looks like a smoke show, only tried it once. What tune should I go with to maximize MPG - that is my end goal is maximizing MPG over stock, not looking for best performance.

If your permanent residence is located at high altitude, I'd probably stay at a 40HP or so for towing.

My reasons for recommending 40HP Towing are as follows:

1. No excessive over-fueling. Towing power will increase but will not dump unnecessary fuel into the engine.

2. No excessive over-fueling. Less fuel will require less air.


3. Mileage will increase over current 80 HP tune due to the reasons above.

[travisunderwood]

Originally Posted by cleatus12r

If your permanent residence is located at high altitude, I'd probably stay at a 40HP or so for towing.

My reasons for recommending 40HP Towing are as follows:

1. No excessive over-fueling. Towing power will increase but will not dump unnecessary fuel into the engine.

2. No excessive over-fueling. Less fuel will require less air.


3. Mileage will increase over current 80 HP tune due to the reasons above.

Thanks, yes I am permanate at 8000 feet elevation. We will see what Bill says once he gets back to me, as I would need to get the 40hp from him as well.

[travisunderwood]

Emailed Bill when I did this original post - have not heard anything from PHP.... how do I get action on this?

I have a 80 tow / 80 daily / 100hp --- I would like to change the 100hp to an altitude friendly tune so I don't belch smoke.

Currently I am running stock tune while I am at altitude. I can only run 80 daily or tow below 5000ft.

Thanks
Travis

[cleatus12r]

I will tell Bill about it tomorrow. For once, he is actually enjoying his weekend so Monday he will find out about it.

It's as easy as putting the new program on the server and you downloading it.

[travisunderwood]

Thanks! Of course he should have a weekend!! I know how busy they are. Its a good and bad problem! Took over a month to get the first modification to my 80 tunes, hoping it wont be too much work/trouble for Bill to whip up a high altitude one to replace the 100hp.

Just have him reply to my email... and I am not trying to use you as a mediary.

[Firehunter]

Subscribed. I live in a valley floor at 5,000 feet and drive to 6 and 7 thousand feet almost every day. I was looking at the 100 tune for daily driving in a 6-speed but may have to go to a lower tune??? Maybe at 5,000 it's not an issue from what I'm reading.

Thanks for the observations!

[soutthpaw]

where in Colorado are you located, I would be happy to take a look at your truck and with Cody and Bill's assistance maybe we can get your tunes tweaked. Bill is coming out for truckfest at Bandimere speedway in August... you may wanna go for some live tuning... I have changed the high altutude maps on Bill's tunes for the CO altitude, however I really need to get setup for live tuning with my Minotaur so I can tweak these settings on the fly

[Pocket]

Originally Posted by soutthpaw

where in Colorado are you located, I would be happy to take a look at your truck and with Cody and Bill's assistance maybe we can get your tunes tweaked. Bill is coming out for truckfest at Bandimere speedway in August... you may wanna go for some live tuning... I have changed the high altutude maps on Bill's tunes for the CO altitude, however I really need to get setup for live tuning with my Minotaur so I can tweak these settings on the fly

I guess I never realized you were in Fountain. You're only about an hour or so away from me.