Differences in tunes within same category

[Aaron B.]

I've been contemplating a tuner for some time, and after a lot of research - I can't find a negative review on PHP. That, and the transparency in which PHP answers customers questions on a public forum(s), gives me confidence in their products. From what I can tell, Bill and his team address the entire operating process of the truck when writing tunes, not just making big HP numbers.

Regarding the Phoenix chip for a 7.3, I have a few questions on the particulars of different tunes within the same category, i.e. 65DD vs 80DD. Reliability and longevity are my primary concerns. I realize there is an inherent risk for ANY modification to these trucks, but it seems there is a lot of unused power in these engines that can be extracted while still maintaining a wide margin of reliability that the 7.3 is known for.

My truck is a daily driver, and will be pulling a ~11K lb load several times a month for short trips on level ground, and probably a few extended trips pulling lighter loads in the 7K lb range but through some decent grades. It is completely stock, except for an EGT/Boost/Trans Temp gauge pod.

Daily Driving - 65hp vs 80hp. Looking for better drivability, and any potential mileage increases. I have no problem giving up "15" hp for a more conservative tune, better mileage, and less stress on the engine. I guess my question is what are the differences between the two? If 15 hp was free, there wouldn't be a 65hp, so who is the lower tune for? It seems that everyone gets the 80hp for daily driving.

Towing - I think I have a good handle on the tow tunes. It seems that the 40hp Heavy Tow would be perfect for my heavy loads, and the 65hp Moderate Tow would be good for my lighter loads. If EGTs start to run high on the moderate tow, I could always turn it down to the heavy tow.

Performance - I'm not concerned with racing anyone, and even considered not even getting a higher tune than the daily driver. But, if it's there, and there is minimal risk to the engine, it might be fun to play with once in a while. 65/80/100 - Similar question to my daily driver question, what do I give up by going to the hotter tunes?