If you went 104mph on a bone stock EVO and then 107.5mph with just a catback then either: A. Your driving improved the next time out or B). The weather conditions were different. Bolting a cat back only exhaust onto an EVO is not going to result in a 3.5MPH gain in trap speed. The extra hp is not there. 10-15whp gains come from the removal of the downpipe and/or cat which is where the restrictions of significance are. Perhaps if a MBC was added where the boost could also be increased and/or sustained til redline, then it would be possible to see these gains but it isn't going to happen in stock form with just a catback.

I have seen the graph of the bone stock EVO IX with the cat back only pull overlayed on it. The curves are almost identical. I wanted to point this out incase people were thinking that although it only made 1 more whp, that there might be other more significant gains in other areas of the powerband where the stock car fell off. This did not happen on this car.

I do agree with most that I would have rather seen them take the car out in bone stock form just to put the slightest doubt to rest. I think that most people would agree that a 106mph trap speed validates a 275whp dynojet number comparing it to others. That is why, to me, the cat back doesn't really make a difference. (I still think a 106 trap validates a 276whp dyno sheet ). Regardless, I would like to see them bolt the stock cat back back on, use the same driver, and take it back out. I feel more than confident it will at least repeat a 106mph trap speed. It might even trap 107 since the driver has literally made 3 passes on the car to date. We'll see what happens.

 

bingo!

 

Again, this has nothing to do with Tym or his shop. I have absolutely no reason to doubt SPI. I'm only referring to the dyno results. I don't think their Dynojet is accurate relative to other Dynojets. They had one 05 dyno 260, yet no one else has gotten close to this. Then, the IX dyno's even 15 more whp, but Buschur's 2 IXs dyno'd almost exactly the same as an 05. I know they have no reason to post inflated numbers, and I know they aren't bragging. The point is that they SEEM inflated now and will probably not be reproduced elsewhere, so people shouldn't get upset if their IX only dyno's 245-255 on a separate Dynojet.

That's all...

 

I agree

 

Additionally, do people aware that this EVO that dyno'd 260whp also trapped 106mph? I thought there was a thread about it but I can't seem to find it now? This is why I felt all along that this EVO IX would surely trap 106 at least. I honestly do not understand how a 106mph trap makes a 260awhp Dynojet seem inflated to some?

 

I never saw such a thing. Only one person has ever claimed 106mph in stock form with an 05 and that was just a week ago. Of the 05s that trapped 105, none dyno'd 250 or higher. I dyno'd 282whp when I hit 107.5.

 

I was verbally told this by Tym a few days ago. I was told there was a thread about it but have not found it. I'll do some digging as to the who, what, and when was.

 

this was like last week... https://www.evolutionm.net/forums/sh...d.php?t=163637 stock 05 that claimed he ran 106.2! if u continue to read on though, this persons validation seems to get lost, and doesnt seem trustworthy, so i dont think this is usable!

 

Man you have a answer and a comment for everthing here on this site. You must be a rocket scientist. For your info, i saw a bone stock IX sat night run a 12.98 at 106.8. So regarless what kind of power the IX puts down to the ground. It is obvous that the 9 makes better use of its power in a straight line. Im not trying to be harsh, (unlike all of your posts). I think that people on this site are getting kind of tired of your rambling.

 

From what I've read, MAHA dynos are better than dynojets. They seem very expensive though, so I can see why most people don't use them. The new EVOs have variable valve timing but are still cable throttle right?

*Edit: Yeah I forgot these cars need to be broken in as well.

 

One may not trust the dyno numbers but a back to back test (on the same dyno)between an 05 vs 06 showed a trend in the distribution of power.....while the peaks may be the same, area below the curve seems to be bigger. Does it mean the 06's are faster?? 5k - 7.5k rpm is bandwidth I use for dragin.

 

what does SSL MEAN?

 

Can anyone take a stock IX, break in the engine, dyno it and then run it at the track? All stock? Someone will soon enough. This thread doesn't really prove or disprove anything.
Other than a Dynojet can match crankshaft HP numbers. Nice! Has Shiv posted a couple IX's dyno results? Be nice to see what a couple Mustang dynos read, dynojunk, dyno dynamics, and even a Dyna Pak.

 

We need that person to come on here and let us all know then! Why's he holding out? It's great information to have. Awesome power if it makes almost 107mph stock despite poor driving (e.g. 12.98). We'd just need to see the timeslip and have confirmation that it was, in fact, stock.

 

+1. I also want to see the slip to see what was the 60ft, 8th mile and all the other info so we can compare it to a stock 05. The other guy that ran 106 on the 05 is possible since there has been a few here that have done 105 stock.