evoscan was logging continuously through all dyno pulls.



dyno txt data

 

I'll run my logs through everything again when I get back in town. There could be a possibility I overlooked something. Wouldn't be the first time.

I have no problem putting my foot in my mouth if it warrants it.

 

I expected to see a difference...I used no CF, dyno was with CF off. Just set the weight the same as the Mustang chart used for evos. Even hp numbers matched, I was surprised.

 

Mine wasn't quite as bad but I had the same situation. Its cause I can't afford to road tune in 4th. 3rd is a ticket I can fight but somehow I doubt I can get away with a ticket at 7k in 4th.

. I've decided to continue dialing 3rd on the street and use the dyno for dialing in 4th.

 

hrmm even @ 7500rpm in 3rd we would loose our license if caught... - that's about 130km/h, and our max is 100km/h... then 29km/h+ over is loss of license...

so yeah top of 4th would be loss of license + jail time :P hahaha

not sure the cops would like 'sorry officer I am just tooning my car'

 

"Sorry officer - I was watching my laptop and not the speedo "

 

I was out tuning the other night and an officer stopped to see what I was up to ... I was pulled over in an empty lot reviewing logs. Ironically, next to the lot was a power company storage area and he stopped because of the recent copper thefts.

I told him I was getting some data from my car to make sure it was running well. He looked kind of bewildered and started asking questions ... partly investigating and partly out of curiosity. I explained how I connected to the OBDII port and logged AFR data via an extra sensor I installed. He was impressed .. lol.

He still asked me to leave ... lol. I work for the power company so it wasn't a big deal.

Back on topic ... does the Mustang calculate in the weight of the rollers like a DynoJet does? I'm not extremely familiar with the differences or the calculations the individual dynos use. Either way, weight wouldn't explain the variance seen in DLL.

 

Was that an 8 or a 9? Based on your loads it appears to be an 8.

 

I would imagine that there are all sorts of variables that could lead to the difference in the numbers, such as:

The Mustang getting hotter (Grease in bearings, rolling resistance)
Very subtle air temperature differences (Did someone open a garage door that created a subtle draft through the dyno area?)
Program calculation differences (Does the dyno round numbers to a different digit than DLL? ie. DLL for example rounds to four, Mustang say six)
Oil temperatures in the car? I would imagine you get a difference between really hot oil vs. hot oil.

These are just random off the top of my head *small* examples of all things that would affect the readings. All the seemingly small variables all add up eventually. (I know some of them are unrelated seeing as though the car was strapped to a dyno, so don't flame me for that.)

Maybe variances in the electricity powering the dyno? Is there a large air compressor powered off the same line as the dyno? Maybe it kicked on during the pull or something... Just ideas.. No flaming required...

As far as the DLL differences, it might be worth the time to see how DLL actually works from the inside, and see what kind of calculations it is using to produce the numbers. There is probably a difference in the calculations between the two dyno's alone.

 

interesting result that the dyno didn't pick up a noticeable difference in power yet DLL did.

The nearest dyno to me is 6 hours away so I use DLL exclusively to make sure every car I tune gets the power it should for the mods/boost/octane...it's a terrific tool.

I've had numerous customers that got e-mail tuned hit the dyno and all but two got higher numbers at the Dyno...the others were down 6-8whp.

so I feel confident using it not only as a tuning aid but as a tool to give the customers an idea about their actual whp.

 

Tuned an Evo 9 yesterday. Ran the logs through DLL. Three back to back logs almost the same power output.

Run 1 and 2 6:29 min apart




Run 2 & 3 6:36 min apart

 

419lbs for content...I guess you and the driver?

 

The driver, myself and 80 lbs in speakers in the trunk.

My logging equipement and myself weigh 183 lbs
The Driver weighed 220 lbs
Stereo equipment 80 lbs.
Subtract the gas weight and you get 419 lbs

 

gotcha that makes sense...i figured something like that but had to ask and I hope you don't take offense, none was intended.

a while back I caught a well known tuner purposely fudging the numbers. Every one of his customers DLL's had something like 760lbs as the contents weight regardless of the car lol.

There was some stock 16g cars putting down 400+awhp on 93 octane with minimal mods and other weirdness at low boost.

If my suspicious are correct those poor guys are going to be sorely disappointed when they get beside an Evo that truly has 400awhp and get left behind

 

It is very tricky, to get DLL right. But once you get it right and use accurate weight, weather, aero numbers, the darn thing is very consistent and accurate.

I was able to locate a weather station very very close to where I log and I get weather data from it. It has been great for me.

I found it here www.wunderground.com Enter your zip code and see if you can find a weather station close by and get the data.

Most of the time I use DLL to get delta gains rather than peak numbers.