Need Help! -- What do you think?

[Stan Weiss]

I have a computer program which I have been working on for sometime.
Web Site http://users.erols.com/srweiss/index.html
Program Screen Shots http://users.erols.com/srweiss/winscren.htm
I have an SCT, with the built-in data logging. I am able to capture engine RPM / MPH with a time stamp during an acceleration run. Back in Sept. '06 I started working on my software which will let me enter car variables and calculate a HP and torque curve from this data.
raw data graph http://users.erols.com/srweiss/graphn.jpg
smooth data ver 1 http://users.erols.com/srweiss/grapha5.jpg
smooth data ver 2 http://users.erols.com/srweiss/graphw4.jpg
The data that is produced should be similar to data from a dynojet. If it will ever be close I do not know. At a minimum I would like to be able to see the difference from one test to the next after modifications were made. What is needed is people who have dynoed their vehicle and have who can email me a log file. I also need what your trans ratios are, which gear the log was made in, rear gear ratio, rear tire diameter, rear tire radius, vehicle weight with driver. If you have them frontal area and coefficient of drag if not I will use 19.4 sq. ft. and a CD of 0.34. If you have weather information, Barometric pressure, temperature, and humidity I can also apply a dyno correction to the graph.
Is anyone interested in this kind of information from the data log files?

 

[blacksheep-1]

great, and I have a diablo......

 

[Stan Weiss]

When I contacted DiabloSport last year about their file format I got this reply.

Unfortunately, the information is proprietary and we cannot release it.
Check with an authorized DiabloSport dealer near you to see if they have the
ability to get what you are looking for!

DiabloSport Sales
(561)750-4511

 

[LaserRed01GT]

Nice work Stan. It's hard to find a definitive answer to our frontal area, although I could probably take a picture of my car and use Adobe Illustrator to tell me the frontal area. Most sources I found list the Cd as .36-.361 for our 99-04 Mustangs, in other words a brick.

 

[Stan Weiss]

Thanks, I will change it to .361. It will not change my result very much but on a fast car it will. Also I check again and I am using 20.0 sq. ft. for frontal area.

 

[Stan Weiss]

Kevin. How much different would a 2000 GT be from a 2003 Ford/SVT Mustang Cobra?
http://www.supercarx.com/articles/specifications/03cobra.htm
Coefficient of drag 0.38
Frontal area 22.9 ft2
They do not have not that info for 2000 Ford/SVT Mustang Cobra R
http://www.supercarx.com/articles/specifications/00cobra.htm

 

[LaserRed01GT]

Kevin. How much different would a 2000 GT be from a 2003 Ford/SVT Mustang Cobra?
http://www.supercarx.com/articles/specifications/03cobra.htm
Coefficient of drag 0.38
Frontal area 22.9 ft2
They do not have not that info for 2000 Ford/SVT Mustang Cobra R
http://www.supercarx.com/articles/specifications/00cobra.htm

Seems reasonable to me for a Cobra. I would think the Cobra's larger front valance would create more drag. The frontal area seems about right for the Cobra as well.

Here is an article in Muscle Mustangs and Fast Fords that lists the Cd for a 2003 Mach 1 as .36. The GT should be very close.

MM&FF Article

 

[Stan Weiss]

Thanks Kevin, Based on this
Overall height: 132.9 cm (52.35 in.)
Overall width: 185.6 cm (73.1 in.)

((73.1*52.35)/144)*.8 = 21.26 frontal area Mach

Front
springs: 600 lbs./in. linear (lowers car 1/2 in.)
*450 lbs./in. linear
*DENOTES MUSTANG GT

((73.1*52.85)/144)*.8 = 21.46 frontal area GT