ZERO-Modification, high-mount track wing (no drilling!)
12-25-13, 02:53 PM
#132
Christmas Update:
Finally got the bumper back on the car and snapped a few photos. I also did the first road test the other night. Had the car up to 100mph at a "closed-road testing location" so as not to break any laws (
). I didn't want to go over 100mph or try a more aggressive pitch until I had a chance to re-check all the mounts and hardware.
At that speed, the wing was VERY stable - I could feel the back end of the car squatting a bit even with the wing at 0degrees of pitch (according to APR that's should be about 240lbs of downforce at that speed). I had a passenger ride with and he sat watching the wing - he said he couldn't notice any movement or vibration. I also had a chase car driving next to me and they didn't see any movement or vibration, but could tell the rear-end of the car was starting to squat from the downforce at speed.
When I got home, I checked the mounts again (everything was fine) and did another "weight test" with a friend. I had him sit on one side, and I sat on the other. He's just shy of 200lbs and I'm right at 180lbs so that was 380lbs of weight on top of the mounts and we didn't notice any issues with the risers/mounts.
Once I do a bit more road testing I plan to sell the prototype risers/wing (keep your eyes on the classifieds section if you're interested) to recoup some costs. I know people have been asking for a group buy, but it's still not quite ready for that yet...
More photos:
Like I said, I'll be ready to sell this one-off prototype soon, so if anyone is interested keep an eye on the classifieds or shoot me a PM for more info. This is NOT a for sale thread and this is NOT a group buy thread.
Finally got the bumper back on the car and snapped a few photos. I also did the first road test the other night. Had the car up to 100mph at a "closed-road testing location" so as not to break any laws (
). I didn't want to go over 100mph or try a more aggressive pitch until I had a chance to re-check all the mounts and hardware.At that speed, the wing was VERY stable - I could feel the back end of the car squatting a bit even with the wing at 0degrees of pitch (according to APR that's should be about 240lbs of downforce at that speed). I had a passenger ride with and he sat watching the wing - he said he couldn't notice any movement or vibration. I also had a chase car driving next to me and they didn't see any movement or vibration, but could tell the rear-end of the car was starting to squat from the downforce at speed.
When I got home, I checked the mounts again (everything was fine) and did another "weight test" with a friend. I had him sit on one side, and I sat on the other. He's just shy of 200lbs and I'm right at 180lbs so that was 380lbs of weight on top of the mounts and we didn't notice any issues with the risers/mounts.
Once I do a bit more road testing I plan to sell the prototype risers/wing (keep your eyes on the classifieds section if you're interested) to recoup some costs. I know people have been asking for a group buy, but it's still not quite ready for that yet...
More photos:
Like I said, I'll be ready to sell this one-off prototype soon, so if anyone is interested keep an eye on the classifieds or shoot me a PM for more info. This is NOT a for sale thread and this is NOT a group buy thread.
01-05-14, 10:49 PM
#137
At 10degree AOA (the most aggressive setting suggested by APR) and 120mph, the GTC-300 produces about 460lbs of downforce. I did some road testing with the wing and it was solid at 120mph.
If you're running a legit airfoil, there should be data on what sort of downforce & drag are generated at various speeds. If you're running a low-speed track you might run a more extreme AOA, where as if you're doing a high-speed track you might run less extreme AOA setting.
01-05-14, 10:52 PM
#138
One other photo. Horrible iPhone pics but whatever...
I should also mention that the prototype will have a new home come late Jan. The new owner will be putting it to the test on the track, since putting my black car under the knife for some engine upgrades at the moment.
I should also mention that the prototype will have a new home come late Jan. The new owner will be putting it to the test on the track, since putting my black car under the knife for some engine upgrades at the moment.
02-21-14, 08:18 PM
#144
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So I was the lucky one to end up with this prototype. Thank you Tom communication and craftsmanship was excellent. Now it's all mounted and ready for track days for testing.
