[FIA GT] FIA GT cars downforces and L/D ratios

[rob21]

Hi!

I´m surching for some aero data about fia GT cars.Does anybody know how much downforce produce cars running in fia gt? I´m also interesting about lift to drag ratio of this cars.Can anybody help?

Thanks in advace.

[AU N EGL]

Welcome to the forum Rob.

I think those questions you ask and big BIG race team secrets.

[The Real DMN]

The PC game GTR2 lists this data for the 2003/2004 cars. I'm not sure how accurate the data is, but the creators Simbin had access to all the telemetry and data from every car that ran in those two years.

Could be worth picking up a copy.

[Ranald]

This RCE website article has some info: http://www.racecar-engineering.com/content/gt1.htm

Corvette C6R l/d ratio = 2.1/2:1

There is also a good, but short, article on the CFD analysis/design of the DBR9 here: http://www.mcadonline.com/index.php?...=211&Itemid=73. Race Tech magazine had a better article aound August time.

[minimangler]

i'd err on the side of caution- especially cars like the Maserati, because its in their interests to have slightly worse figures than true...

[rob21]

Originally Posted by The Real DMN

The PC game GTR2 lists this data for the 2003/2004 cars. I'm not sure how accurate the data is, but the creators Simbin had access to all the telemetry and data from every car that ran in those two years.

Could be worth picking up a copy.

I checked those data and I´m not sure about L/D ratios which I found there.For 550 Maranello is L/D ratio 2.86 and for Saleen and MC12 is L/D ratio over 4.Those numbers I think are too high.But if Simbim has had access to all the telemetry and data from every car it should be accurate.

[rob21]

Originally Posted by Ranald

This RCE website article has some info: http://www.racecar-engineering.com/content/gt1.htm

Corvette C6R l/d ratio = 2.1/2:1

There is also a good, but short, article on the CFD analysis/design of the DBR9 here: http://www.mcadonline.com/index.php?...=211&Itemid=73. Race Tech magazine had a better article aound August time.

Thanks for those links.
Corvette C6R l/d ratio = 2.1/2:1 seems to me accurate.I estimated downforce around 450kg at 200km/h.

[canam]

Originally Posted by rob21

I checked those data and I´m not sure about L/D ratios which I found there.For 550 Maranello is L/D ratio 2.86 and for Saleen and MC12 is L/D ratio over 4.Those numbers I think are too high.But if Simbim has had access to all the telemetry and data from every car it should be accurate.

Simbim would not have had access to L/D data as many/most of the teams would not have had that information anyway. All those numbers are far too high IMO. The Corvette info is closer to the mark (and may be even a tad high).

[AU N EGL]

So Rod, why do you want this data?

[rob21]

Originally Posted by AU N EGL

So Rod, why do you want this data?

I´m just looking for some numerical expression how good are they from aerodynamic point of view.I also try to make physical model for LapSim simulation software.Ican find some figures for f1 cars,for lmp cars but nothing for fia gt cars.