Milltek Exhaust Install at Imagine Auto 298 HP!!!

Ok I forgot my memory stick adapter so no pictures at the moment but here's what's gone on so far. I took a video with audio of the stock exhaust and it being rev'd for benchmarking purposes. The car was then put on the Mustang dyno and several runs done. The car consistently put out 276-277 HP at the rear wheels. Yes this is down from the 281-283 it achieved months ago but still higher than the original 267 before the air intake mod. Obviously the gas is different, the weather is much hotter and I've since installed the EVO intake so it is hard to do a direct comparison other than to say that the car still makes more HP than it did stock, even in hotter weather, so something withe the intake, whether it be EVO or baffle removal or both have produce 'some' horsepower gain on my car. We were doing these dyno runs to set a baseline before the Milltek exhaust goes on and before any ECU tuning from GIAC. The car is being rolled off the dyno now, will cool down and then be put on the lift for the exhaust install. Steve Decillus (sp?) is the tech at Imagine Auto working on my car under the supervision of Stephen Kaspar the owner of IA and PCA Tech advisor. Stay tuned!

Different dyno results are to be expected with different conditions and operators so the comparision with the earlier run should not be bothersome and your results fall well into the statistical expectation. Looking forward to the rest of the story.

K-man, The first time you had your car on a dyno was it a Dyno Jet or Mustang Dyno. The only reason i ask is because the 2 dyno's give different results. I have battled this reason ever since i started dynoing my cars and always heard these differences. So i finally contacted the manufactures and got my answer. Mustang dyon's do give you a lower number b/c the computer software they use has more variables in it. The Dyno Jet gives you the most specific numbers. At least that is what the tech department told me.

The dyno being used is the same, a Mustang 4 wheel dyno, about an $80,000 piece of equipment, computer controlled and each car is calibrated on the dyno before it is even run. I'm pretty confident that it is giving accurate results. My prior runs have all been on this same dyno.

Have you ever heard of what i was saying about the differences between the two?

I have heard that different manufacturer dynos will give you different results, with each manufacturer claiming that their results are more accurate. Mustang is certainly a top-notch dyno maker so I'm confident that their results are as accurate as any, and for the purposes here we are comparing before and afters on the same dyno so we are ruling out the use of separate dynos. I can say the computer screen on the Mustang dyno reads out a wealth of information about what the car is doing, I captured a few screen shots on my camera to show this later. There is no shortage of info on the Mustang if that is what you are asking.

I think the point is the amount of relative change resulting from the mod, not so much the absolute result value. Good thats itson the same dyno as in the past.

I can't wait to see the results of the new exhaust setup.

i have had several of my cars on the mustang dyno and i do agree about the fact that your doing before and after on the same dyno so everything will be accurate. I have an appointment with the dyno this week as well so I'm curious to see my results vs yours. My car will dynoed with the air re stricter removed, BMC air filter, and the fabspeed cat back exhaust. Then next week with headers and ECU upgrade. This should be interesting to see /fckeditor/editor/images/smiley/MWPX/thumbsup.gif

Dyno numbers will vary but as long as you have a base run to compare to then you should be okay. I prefer to stick to one dyno so you don't get confused with the numbers. The only true way to get actual HP numbers is to remove the engine and do an engine dyno or whatever it's called. I've seen vids of that done.

Very interested to see the results....thanks K-man

Update - The factory exhaust is off and the Milltek system is 1/2 on as I type. I took some great photos showing how restrictive the factory 'headers' are vs. the Milltek ones. I know a couple of people asked about weight and we didn't have a scale to weigh the systems but picking up the headers I'd say the Milltek headers are a little heavier but I would expect that, fatter pipes, larger cat. However, the rest of the exhaust the cat-back the Milltek was lighter and by more than the cats were heavier so overall I'm sure it drops a few pounds. Some people care about that, I don't since the difference is probably what I could lose if I went on a diet for a week, but still nice to know. The weight of the stock system seems to be tied up in the main muffler and second cat. BTW I confirmed as I thought there are 2 cats per side on our factory exhausts. The Milltek system I am installing also has 2 cats per side although higher flowing / less restrictive than the factory units. It helps to have 2 people to take down the old exhaust and lift up the new one. The new use uses the existing bracket for mounting on the car. A little positioning work may be in order when we are done, but its too early to tell at the moment, there is adjustment in the factory bracket so that shouldn't be a problem. So far things are looking good, can't wait to hear it and dyno it!

There was a really interesting article I read years ago talking about dynoing cars and the basic conclusion was that dyno results were more or less valid on that dyno, that day, and with the current car in its current condition. Besides major, well know conditions like dyno type, temperature, and pressure, little things like new vs old oil (even of the same type), oil temperatures, and coolant temperatureshad minor influences on dyno results. They basicallycame to the conclusion youneeded to establish a new baseline each time you went to test a modification on the car and even that can be skewed. They talked about how some aftermarket manufacturerscould get and claim better improvements by playing with some of these variables. I'm not saying that's what's going on here, but its also what separates some of the respectable tuners and manufacturers from those less scrupulous. Edited by - heckler on 07/24/2006 09:48:24 AM

Another update - The headers were going on until we ran into a snag, one of the O2 sensor holes had some weld flashing in it that had to be ground down for the O2 sensor to fit. A brief delay while this was ground down but now the headers are on the car and things are being adjusted and tightened up, should be fired up soon!

Kman S, thanks for taking the time to provide a live commentary...is the GIAC planned for today as well?

I heard from Garrett at GIAC earlier, and he is on standby to do the tuning as well, so if all goes as planned YES, but of course if he gets called away or something happens then maybe not, cross fingers!

We have ignition! WOW! At idle it is plenty quiet, blip the throttle and BAM 993 Sport Exhaust Gutteral Rumble is probably the best way I could describe it. So far sounds sweet, we are pulling it onto the dyno now to do the post run and I'll get to hear it at wide open throttle, will report more soon, so far THUMBS UP!

298 HP 244 Torque !!! (vs. 277 HP 229 Torque before) That is what the same dyno on the same day says with nothing more than the install of the Milltek exhaust - WOW!!!

Thats like 345hp at the crank. AWESOME!!!!

21 + HP gain..... Awesome!!! Group buy!!!

Please give us feed back when you drive the new beast! and be sure to 'Hold On'....

This could be an historic Group Buy if all cooperate. Twenty one HP is a real gain. zornet

HOLY S@#$ !! Dyno chart please. Ken, are these numbers ISO corrected to standard ambient temperature and pressure or are they at the tested conditions. If so, what was the ambient stagnant temperature and pressure? Without ISO corrections we can only claim relative improvements and cannot compare to Porsche published data. Vic

Silversled, I didn't want to answer until I talked to Stephen Kaspar the owner of Imagine Auto and his response was YES these numbers are ISO corrected to standards and that their Mustang Dyno is running the latest software revision and is in tune. I also spoke with Stratmosphere and they ARE going to offer a GROUP BUY, they are still working out the details and I will report them (or Stratmosphere will) as soon as they are available.

Nice, as you use it please give us some other results like any change in gas mileage along with performance measurements.

K-man, Please do us all a favor and list exactly what mods you have done to get to 298hp. Thanks