Originally Posted by M7H
Touch a high speed curb, and your car will certainly start flying....
Any car hitting a high speed curb will go flying
Today I did some testing and to make the test as fair as possible, I had 4 sets of tires all cut to the same diameter, same shore and brand so that I could get a true result of doing the test.
The results were not totaly what I was expecting. First, I put the car on the track and drove it like would normaly, and I found that an On-throttle push at medium to high speeds was preventing me from running as fast as I would have liked. This led me to believe that the front A-arm difusers were preventing the car from turning so I removed them. With them removed, it was MUCH better, the car was diving into the corner and the rear of the car felt different, I can't realy explain it, but If I said the car felt like it was sliding to the inside of the turn, it was a wierd feeling at first. So I trimmed off just a bit of the rear diffuser fins (about 1mm) and that made the car much better. I noticed that the car was turning better and I could get back on throttle way before the apex of the turn. With my buddy there, I allowed him to drive the car and he was very pleased with the way the car handled. I took tire data as to how much I had rubbed off and set that to the side.
Next,I removed the diffusers all together and ran the car in stock form. I instantly noticed that the rear of the car was sliding all over the place, I thought it was me. I handed the controller to my buddy and let him drive it. He confirmed that the car was VERY VERY LOOSE! Running the same amount of time, 1 tank of fuel, returned to the pits and took tire data again. WOW...almost 3 times as much tire wear!
Third test, I put the rear diffusers back put set 1 of tires on and ran qualifier #1. The car was very good.
Second qualifier I put set of tires #2 on and ran that without the rear diffuser. The car was within 1 second of the previous qualifier. and the car was all over the place. Checked tire wear from set 1 & 2 and found about twice as much tire wear on set 2....ALSO ON THIS RUN, I INSTALLED THE REAR DIFFUSERS ON ANOTHER RACERS CAR...HE DID NOT WANT TO GIVE THEM BACK. IT FIXED HIS CARS LOOSE CONDITION AND TIGHTENED IT UP A LOT.
3rd qualifier, I got the diffusers back and put them on but trimmed off about another 1/2mm and put tire set 3 on. Again, the car was much better, the rear remained planted but it turned even better. Again tire wear was reduced, but this time I had ran almost 6 seconds faster that the previous 2 runs.
The Results are: It may help lap times a little, maybe 2 or 3 tenths of a second, but the major bennifit is that tire wear is substantialy reduced, you can get back on throttle sooner, have less tire wear and have a more stable car. I started the main with 57mm fronts and 58mm rears. Ran a 15min main, and came in with 56.1mm rears (don't remember the fronts) while the buddy that ran the diffusers went out with 61mm rears and came in smaller than what I had remaining on my car.
SO, Does it work? Yes