stealth_GT

490whp is a good number with a dyno tune, long tubes and 93 octane.

I'd be right up there as well if I could dial it all in and have it all set up on 90 octane gas. Those Pro-chargers are pretty awesome kits!

SCCAGT

Well, there is a small story behind this. My car was used by Procharger for tuning an auto. The 5 spd tune that came with the kit was totally worthless. Got the car in to them a couple days after my install. It hit 450hp on their Mustang dyno, completely stock, except for the Procharger kit and only 3300 miles. Outside temp was roughly 45 degrees that day. Over the summer, I installed the headers, and Magnapak system. Then started fiddling with the tune and promptly erased it from the tuner. lol. Good times indeed. Luckily, they called and said they needed my car again to test a new MAF location. (there is a god!!) So back to them the car went to move the MAF to the intercooler outlet. Now it got tuned with the exhaust in place as well. That day happened to be the friggin hottest, muggiest day of the year. between 95-100 degrees (and probably the same humidity. Hit 459 rwhp on the same dyno. Got a free MaFia for my troubles, but I had to replace the rear brake pads and rotors. Apparently more dyno time went into this session than the first time around.
This spring, a friend of mine installed a new DynoJet dyno in his shop, so I quickly raised my hand to be one of the first cars on it for free. No additional changes have been made to the car. No tuning, just a hp run on a 70 degree day. 487 is what his machine spit out. I know there is a difference between the two types of dyno's, but think that is a bit much myself. Maybe his wasnt quite calibrated right, I dunno. Ambient temp can also be a factor, thats why I included them.
So thats the story behind the 487 claim. We all want to claim the big numbers, right? lol

ADDED: Last night, was thumbing through the newest 5.0 magazine. An article on a 2011 V6 Procharger install was in it. On their Mustang dyno (same one mine was on), it hit 415 rwhp. They then took the car to MC Racing(about 15min drive from ProCharger) and put it on their dyno, a Dynojet but not the same one I used, and made 438rwhp. A 23hp difference vs my 28 diff. So I guess maybe mine isnt that much different.