Is there a chance the dyno could have been recalibrated to read low numbers as the usual Mustang dyno? I know the first time you dyno'd with your mods, it seems to read like a Dynojet in which I too put out similar numbers with similar mods (300whp/310wtq with the flash and mbc). I have yet to go back to get redyno'd with the exact modlist you have on the car now, but it definitely feels stronger than before compared to when I had stock exhaust. How does your car feel compared to when you had stock exhaust?

 

trust me, I totally understand that being from vegas. But if anything he should have at least seen some gains

 

somethings wrong. you should have gained a little despite the temperature change.

 

+1

 

Can you post the graphs?



You cant use the two dyno runs, seven months apart as a comparison - way too many variables at play, and that's obvious with a decrease in power from a liberating mod for the IX.

Go get a customized dyno or street tune so you can feel the difference, peak dyno numbers mean absolutely nothing for measuring the net power gain, especially in this fashion.

Get some track times for your next mods

 

I have uploaded graphs to AIMpages :

http://www.aimpages.com/christojenkins/profile.html

I think there are 3 possibilities:

(1) The 'new flash' is no different than the previous flash, therefore not really taking advantage of the 3" TBE or bigger fuel pump

(2) The heat stole 20 + hp (I was expecting to get from adding a 3" TBE)

and / or

(3) The IX exhaust is perfect for the IX and adding a 3" won't do anything for performance

Personally, I am leaning towards 1 and 2, but again would love 'educated' advice / suggestions. Thanks

 

It looks like you are still pretty rich. I thought the 9's held more boost to redline than the 8's? I've got 18-19PSI at redline. Does the tune control boost? I don't know much about Al's tunes.

A 50 degree difference is pretty hard on a turbo car. It would not suprise me if it were worth 20hp. It definitely feels like it with my car.

 

It is mostly the heat and the different day... the ONLY time you can compare different dyno sheets is if they were on the same day/dyno while strapped down, and on that day there were little to no atmospheric changes between pulls.

 

Looking at the dyno graphs, it looks like you gained 8 ft lbs of torque.

The bottom of your signature mentions ... wideband and custom tune.

Why not follow you own advice ?

If you want your car to run optimum and safe, you need to take
some responsibility and control.

In addition to a wideband, EcuScan is a nice tool for checking timing and knock.

 

get a real tune on a dyno. find a tuner/dyno near you who can use ecuflash, you prolly just have to pay for dyno time. 2 different cars with the same mod will behave differently to the same flash.

You seen here that some cars response really well, unfortunately yours does not. Its a hit or miss situation

 

Aimpages.com huh, myspace better watch out!

I drove Chris' car yesterday and compared to mine (Evo IX with base dynoflash and MBC @ ~22lbs), it does feel like it pulls stronger in the higher RPMs and has slightly better boost response.

I do have the tactrix cable and we were going to do some logging with EvoScan, but I guess it takes a while to receive the software after paying for it ...

It would be nice to see SAE corrected versus the uncorrected to run just to see how much the correction adds, even though we know it's not that accurate for turbo cars. I also agree that we can't be certain that Curry's hasn't recalibrated their dyno since January.

All in all, there isn't really enough information here to draw much in the way of conclusions. There was a gain in tq. even with the massive temp diff, so obviously the parts did some good. The next thing to do I think is some logging with EvoScan to see if he's pulling timing, and maybe try to redyno on a known dyno (like Mach V) for comparison. Ideally it would be nice if Curry's can give you an SAE corrected plot as well just for curiosity.

I should also note that Chris' car still exhibits what I refer to as 'lazy' boost. This is shown in the boost plots for both runs. The boost rises, drops a bit, then rises again, and then fades to below 18psi at redline. I really don't know the cause of this, although I have always suspected a slightly loose wastegate actuator. If he could hold a little more boost to redline with something like the Forge wastegate or just adjusting the stock unit, he could obviously make more peak hp ...

 

22.5 psi on stock exhaust (Jan '06 @ ~40 deg.)
22.5 psi on 3" exhaust (Aug. '06 @ 90 deg & crazy humidity

this is your answer the change in temp from 40 to 90 deg in temp.
I put down 345hp/347tq back in feb & in july on change in tune it made 330hp on a 101 deg then a week later at 68deg at 11pm it made 344whp all this on the same dyno with Sean Ivey (Iveytune.com) on the wheel

 

I think it's 1% power is lost per +10 degree temperature change.

So it's a 50 degree swing plus high humidity then this might be the cause of your lower than expected #'s as somebody suggested earlier.
.

 

I guess that explains it. Wow, such a drastic difference depending on the weather!

 

Thanks guys...I am definitely going to get a custom tune and hopefully will see some good gains.....So if the temperature is the real culprit, I would think that a better / cooler intake would help too.

FWIW -- The bozo that dyn'd my car only had one small fan on it (so that could have impacted the results as well). He was a real *****. Each time I asked him to do something he had a hissy....Definitely my last trip to Curry's...