Nice Opel Astra! Do you dare sharing numbers with us, since we are on a technical-oriented forum?
I could but I'd have to kill you!
Given all the work we have done on the car, we keep the data close to our chest. Downforce, spring rates, weight, HP, corner speeds etc etc are all held onto by the guy that does the ECU and data and short of beating him to death for it, nope I'm not posting it up, lest he beats me to death for it!!!
As the aero was pretty good from last iteration and decently neutral, we only revised the front bar again, front floor element and bonnet to try and improve the flow balance again and to accommodate the new engine and gearbox package we fitted this year concentrating on improved drivability, tunability and power/torque.
Cold Fussion wrote:Looks pretty cool, will check it out at WTAC.
Thanks, it will be there.
NoDivergence wrote:As the individual with the Astra has said, it's obvious what works and what doesn't, and when you see what's left on the cars year after year, and designs start converging, guess what that means?
It is very easy to see the effect of a change after a few laps, coast down tests etc during testing. Driver will say it feels better, I will feel it as well and the data will show something else.
By raising or lowering the front wings, raising or lowering the rear wing, changing attack angles, adding elements you can see the difference in the data be suspension compression (front vs rear), lateral and longitudinal chassis movement (stability, logged over compression/braking), acceleration, corner speeds, brake pedal pressure, throttle % and the list is endless.
Even simple roll down tests can reveal a great deal when you get a decent sample set and see the way the chassis loads and unloads. We did some CFD modeling (not a stringent as using Andrew B but we still did. The modeling was the hard part!!!) and sought advice however a lot of advice mixed with trial and error got us what we have.
Never approach a Bull from the front, a Horse from the back, or an Idiot from any direction