I was playing around with the AX22 today to try and get familiar with the menu in the unit and I came up with a number of questions that need answering. I'm sure others have also. I thought I would start a thread so we could all be on the same page when reporting our data. Some of the configuration settings that need to be considered to ensure our data is compairable include:

1. Mass - what is the weight of the 996TT?

2. CdA and Rolling Resistance - anyone do a roll-down test yet to get the correct numbers?

3. Tilt Factor - are we going to keep the numbers that came with the thing? Will this have to be adjusted for suspensions with different firmness?

4. Smoothing - not that important when displaying a graph, but may skew data reported on peak HP/TQ. What are we going to use for a smoothing factor?

I'm sure there are other questions. Let's get these things in sync so we can start compairing!

 

Zippy,

All of these will not impact readings. They will help you when you want to plot data like calculated torque etc.. The one thing that is important is to calibrate the AX22 while standing before starting to drive. It talkes a few seconds.
Just set it up to "continuous mode" and take off, drive, do your runs etc..no need to look at it at all, just go back home and download the data and choose whichever timeline that you want, or you can sort by speed from: to: etc..
When you download the data, you should not get any messages telling you that your tilt factor was more than 10 degrees (from memory) or so.. Otherwise it means it was not levelled properly.

 

So where are those plots?

 

Yes! Anyone break 8 seconds 60 to 130?

 

Jean - You are correct . None of the factors I mentioned would affect the Time/Distance data, but only the calculated HP/TQ data. None the less, I would like to get that info into our AX22s so when we see who has the faster car, we can then analyze power curves etc. I will try and get some data tonight!

Mike

[EDIT] - Let's do a group buy on the fancy cases that are available http://www.race-technology.com/Site1_UK/acatalog/Accessories.html

 

Zippy,

It certainly is interesting to have all the right data in there. One thing that is very useful (at least for oneself) is to know what sort of rolling resistance you have with your specific tire and wings setup etc, also the roughness of the asphalt and wind obviously will make a difference.. Ideally done on the same slope where you had the run.

The best indicator of torque (provided there is good grip) are the longitudinal G's. Those show how strong the car pulls, the average is what is the best indicator rather than a peak, since it tells you that your car has a broad power curve and is well rounded..

Looking forward to see some runs from anyone, faster, slower, Supra, Porsche , dissapointing, overwhelming, whatever, it is all fun!

 

It would sure be nice to see somebody post some results!!

 

JETJOX, did you get my msg ?
I have a 60-125mph if someone is interested....Maybe that would start the ball rolling? Time was 7 seconds flat.

 

Excellent!! I look forward to using this thing when I return home next week

Joe

 

Thats mighty fast Jean . . . congrats! I should have my car back at the end of this week. I'll try to make a few runs thereafter.

Craig

 

Jean
7s with one shift.That has to be the fastest time I have seen yet from a Porsche.
Hey everyone for comparison reference, here's graph with the run that was done by
Ruf590 GT2 vs. Evo Stage 4 vs. Evo GT750.

 

7.25 seconds . . . outstanding Vincent!!!!!

BTW, Jean said he did 7s to 125, not 130. By comparison, you got to 125 in approximately 6.7-6.8s.

Craig

 

Yes Craig is right, my run is 60-125mph, I don't have one to 130mph yet except on the race track which starts coming out of a corner so it is very slow (in the 10s).

The point is that this is about comparing between different setups. Of course I cannot be as fast as an EVO 750 when I am running 530-550HP max. This is how my time compares to some of the supercars:

100-200KPH (62-124mph)
My time : 6.7 sec.
CGT : 6.9 Sec.
Enzo : 6.7sec.
EVO 750: 6.4 sec.

BTW, there is a lot of other info that is interesting from a run, for instance, I added the lateral Gs, check out my loss of traction in 4th gear at 100+mph, making my car wobble to 0.3Gs sideways, trust me that is scary. The red line and red scale are lateral Gs.

 

Graig

Sorry but those are not my run datas. I got the graph from RL
I think the 7.25s was Guy's Ruf Nardo GT2.
I will all my cars run when the rain stop pouring.

 

Nice run, Jean!