Originally posted by KingpinSVT:
Well here is why I say that:

1) Most stock SVTs dyno in the 165ish range. A cat back shouldnt have you too far away from that.
2) Mustang dynos read lower compared to Dynojet (more of a standard around here)
3) Your HP seems too high.

So with that I say its corrected because 175whp on a Mustang dyno would take a lot more than a catback. Also, trying to correct HP numbers across dynos is funky, and shouldnt be done because their is no standard, its just close guesses to what the conversion might be. I think they might have skewed your numbers in trying to give you HP numbers to compare to DynoJet numbers. Either you have a freak or the numbers got skewed somehow.

FWIW, my SVT with intake, headers, catback, etc. (no tuning) put down 175whp on a DynoJet so if you can match that with just a catback, well, I would cry.

And sorry if thats a crappy explanation, Im unable to type much right now b/c my fingers are still numb from having some skin removed from my hand this morning.



We used the same Dyno/shop for our dyno day last year. I'm 99% sure that Mt. Airy Total Performance http://www.totalperf.com/ is NOT adjusting the number as they are VERY anti Dynojet. As far as they are concerned the Dynojet is a Dreamjet that produces inflated numbers. http://www.totalperf.com/dyno.html They could care less about Dynojet numbers, so why convert to false information. They are in the business of building and tuning racecars...not providing false information for show and tell; they use their numbers not false adjusted numbers. What purpose would that serve

Mike's numbers are very close to my numbers on the same Mustang Dyno he used Dyno-Day link . My pulls were cut short due to my factory rev limiter shutting me down before Max power was achieved. My mods were at the time Bassani Cat-Back, MSDS Headers & Y-pipe, Max-Flow Extrude Honed UIM and K&N RU-3530. Mustang Dyno: 172hp/145ft/lb Not knowing how much more I would have gained I was told there was more to be had based on what they saw.

Yes, Mike's numbers do seem a little high for his mods and compared to my baseline pulls before the headers as well but there have been know to be some freak's out there for sure. So I say excellent numbers Mike...congrats


Scott 2000 Contour SVT #1464 Mustang Dyno: 171.6hp/145.3lb Dynojet Dyno: 171.1hp/148.9lb 1989 20th Anniversary Turbo T/A "Indy 500 Pace Car" #1376 of 1550 All Original, 46k with a few mods 2002 F150 SuperCrew