Hoosier TD-R sizes |
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Hoosier TD-R sizes |
twin356 |
Feb 20 2019, 09:02 AM
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#1
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Newbie Group: Members Posts: 20 Joined: 15-December 07 From: virginia Member No.: 8,471 |
I will be rolling out my 914-6 2.0 vintage car this spring. Looking to understand what size rear tires to run on 8" rims. I basically geared for 24", as that is size of most 225/50/15 radials. However, in vintage (SVRA/VRG) is preferred. So, run the 24x8.5-15, or the 25x8.5-15.
What is being run by others? Thanks Scott |
wndsrfr |
Feb 20 2019, 12:04 PM
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#2
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Senior Member Group: Members Posts: 1,430 Joined: 30-April 09 From: Rescue, Virginia Member No.: 10,318 Region Association: MidAtlantic Region |
Hi Scott...I've been racing with SVRA/VDCA/VRG/HSR for the past year and am on the Hoosier's with Kermee--2.7/6 weighing 1950#, 215rwhp and stock gearing. I'm on TDR's, 23x7.5 15 front and 24x8.5 15 rear. The car likes that setup as it's faster than the driver....Lap times at Summit Point are 1:28's mostly, one or two at 1:26 & change. Curiously, at VIR & Watkins Glen the lap times are almost identical at around 2:20 with a few at VIR at 2:18 or 2:17& change, Road Atlanta at 1:45's....
If you're any lower on power, don't go with the 25 diameter as you'll be better geared with a stock box on the 24's.....I can just barely hit my rev limiter (conservatively set at 7400) at Daytona crossing the tri-oval at about 153mph... The Hoosiers start out at 17psi cold, finish at 22psi hot in a 30 minute session and start to fall off after 16-18 heat cycles with my level of talent. If you're considering radials, the groups may "frown" on them unless they've got full tread--you might get by with Toyo RA1's shaved to 4/16's--I really liked them when doing DE events but am drinking the koolade with the racing groups and using Hoosiers. |
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