Just thought I'd share my results.
A guy I work with has a 2002 F250 7.3 that has quite a bit of work done to it. Ever since I bought my truck new he was always making comets about how his 7.3 had a special tune from some guy down south that they call the Cummins KILLER. So recently two months ago I did all the deletes and went with 5" turbo back flow pro along with MM3 tuned by Ray.
last week after work I asked him if the Cummins KILLER wanted to do a rolling race, he smiled and said "SURE" So we did a couple of 50mph and 65mph rolls on the freeway up to 100mph. I must say I was very surprised in the results. I had my tune set on the 120HP tune along with the 68RFE trans tune. Every time we started the rolling race no matter what speed we were going my truck would get the jump on the 7.3 and walk away from him all the way up to 100mph. Its was so freaking AWESOME !!!!! I would of never ever guessed my truck would out run his.