What Wheels/Tire set up on your GT body race car? |
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What Wheels/Tire set up on your GT body race car? |
jmz |
Aug 18 2017, 11:21 AM
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#1
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Member Group: Members Posts: 165 Joined: 11-April 16 From: Lone Star State Member No.: 19,886 Region Association: None |
What's everyone running for wheels and tire size on their race cars?
Do you go with a staggered setup or square? What size wheel? What size tire? What do you run for rains? So far I've tried 15x8&9 with 245x40x15 DOT comp tires on all four corners Maxxis Victra RC-1 16x10 with slicks on all four corners. Dunlop 265x60x16 slicks I'm most likely going to run 16x8&9 next weekend with 245x45x16 on all four corners with RA-1s. I've got some 15x9&11 that I may try down the road with my local club and when I run COTA with SVRA later this year I'll have to go to 15x8 on all 4. I'm new to this car and am still learning it and learning to race. |
Cracker |
Aug 22 2017, 07:03 AM
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#2
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Advanced Member Group: Members Posts: 2,148 Joined: 2-February 10 From: Atlanta (area) Member No.: 11,316 Region Association: South East States |
Regarding the spoilers, splitters, spoiler and wings....
My on-track experience leads me to believe: 1) The duckbill spoiler is of no tangible performance value but it does greatly help the aesthetics of the rear on a 914. That air is dead as dead as can be... 2) The spoiler is a decent place to mount brake cooling ducts but not much else..it increases drag vs a stock valance. The increased stability is probably a function of the car being slowed down due to the increased vertical surface area. I run this air-dam too... 3) A wing needs to be way the hell up there to grab clean air - the bottom of my wing is 1" (and should be higher) above the highest point of the roof line. 4) An actual splitter must be able to support at least 250 pounds of direct vertical force to remain stable at speed. My first effort fractured at 160 mph (mid-corner T9 RA) and I thought I had lost a wheel!!! IF you install one - bring it back all the way to the front suspension cross-member - there is more to aero than just the leading edge reveal. Not meant to offend and step on toes - just sharing what I have learned... T |
jmz |
Aug 23 2017, 10:26 PM
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#3
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Member Group: Members Posts: 165 Joined: 11-April 16 From: Lone Star State Member No.: 19,886 Region Association: None |
Regarding the spoilers, splitters, spoiler and wings.... My on-track experience leads me to believe: 1) The duckbill spoiler is of no tangible performance value but it does greatly help the aesthetics of the rear on a 914. That air is dead as dead as can be... ... T ...so in your opinion, do you think that a little ducktail spoiler could be run without a front spoiler? ...sure cannot do that on a 911. I'm talking about one like on the yellow car or the one you can barely see on my the green version of my car in the photo above. |
Cracker |
Aug 24 2017, 05:29 AM
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#4
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Advanced Member Group: Members Posts: 2,148 Joined: 2-February 10 From: Atlanta (area) Member No.: 11,316 Region Association: South East States |
Spoiler or splitter? If you are referring to a splitter as a spoiler - no you can not but if you just mean a spoiler as an airdam - yes. PM me with your contact info if you want to discuss this - far easier and more precise.
Tony Regarding the spoilers, splitters, spoiler and wings.... My on-track experience leads me to believe: 1) The duckbill spoiler is of no tangible performance value but it does greatly help the aesthetics of the rear on a 914. That air is dead as dead as can be... ... T ...so in your opinion, do you think that a little ducktail spoiler could be run without a front spoiler? ...sure cannot do that on a 911. I'm talking about one like on the yellow car or the one you can barely see on my the green version of my car in the photo above. |
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