I have the SCT on my 05 Excursion and run it on the race tune all the time unles I tow my car, I think 150 hp more. I've run it on the 1/4 a few times with no problem. I bought the truck new and have had the tuner on it since its had about 12k miles on it now have 87k on it. Only problem I had was pushing coolant out the bottle when towing due to a clogged egr cooler. The dealer cleaned that and all is well again.

I don't have a egt gauge so I don't know what those are when I dragged it. And don't know much about pulling like how long the pull lasts. My 1/4 times where 14.6 seconds long. My truck is completely stock except for the tuner.