Has anyone found a chip for the V10's that actually works? I was goofing around on eBay and found this. For $19.99 it can't really hurt too try this one:
I have a DP-tuner chip on my 7.3, not sure if they have anything for the V10. Lots of posts from people liking 5 star tuning. I know it's been talked about, do a search, should come up with some threads. Wouldn't mess around with a $20 eBay find, promising huge gains.
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'03 Ford E350 7.3L Diesel
(de)SMB'd Custom RB-50
Quigley 4X4 w/Deavers & Agile Offroad's R.I.P. package
CCV High Profile Pop Top
You do NOT want one of those. All it does is modify the intake air temp signal to fool the PCM into extra fueling. That won't actually help under most circumstances, and can cause problems the rest of the time (besides wasting fuel).
If you want more power, you need at least good programmer like 5-star, and/or better breathing.