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[Z06] Squared set up for track?

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Old Nov 15, 2012 | 03:40 PM
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Default Squared set up for track?

Just recently bought my '04 z06, and plan to use it for track day events.
My thoughts were go with a squared set up, so i can rotate to get better tire life. I do this currently with my M6 on track days, and I got 31 sessions out of a set of R compounds before I corded one of them.
What size wheels work best for squared set ups? I was considering getting 2 more of the 18x10.5 rear zo6 wheels and use those on all 4 corners. Any issues doing this? I test fitted one of the rears on the front and it clears everything it appears. Should I stick with the stock 295 size squared or is there a size that works beteter? 305's, 315's, etc?

Thanks for any help, Keith

Last edited by ktlocklear; Nov 15, 2012 at 04:08 PM.
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Old Nov 15, 2012 | 04:54 PM
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We have an Road Race and Auto-X forum here where the track rats hang out.

Look under corvette General.

17x10 or 18x10 with 315/35 tires.
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Old Nov 15, 2012 | 06:08 PM
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I run an 18X10.5 square set up and the 295s are about all I can do on the front if I want to clear (most the time) the aftermarket air ducts.
I think my wheels are 60mm offset.
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Old Nov 16, 2012 | 09:17 AM
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A guy a Chin event recently had a ST2 Vette with 315 squared Hoosier's on the stock 18x10.5 wheels. He said he had no issues with it.
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Old Nov 16, 2012 | 11:14 AM
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Originally Posted by JeremyGSU
A guy a Chin event recently had a ST2 Vette with 315 squared Hoosier's on the stock 18x10.5 wheels. He said he had no issues with it.
Thanks for the help everyone!

Which Chin event? I just did an event with Chin up here at Barber Motorsports Park
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Old Nov 16, 2012 | 11:42 AM
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many PPL dont realize who WELL your vette can handle until they run a square set up.

295s or 315s and a great alignment and corner balance. WOW the car can just rotate, like it is sitting on the head of a pin.

my car handled best with I was running Goodyear G19s 18x25.5x11.5 on all fours.

Good year stopped making those tires.
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Old Nov 16, 2012 | 11:48 AM
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I bet the Pirelli WC DH slicks in a 305/660/18 or 305/645/18 would work on all 4, great tires and easy to get still
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Old Nov 16, 2012 | 12:52 PM
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What does a 'squared' set up mean. Is that just running all 4 wheels & tires the same size? Long time drag racer, never auto crossed before but I'd like to one day.
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Old Nov 16, 2012 | 03:27 PM
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All 4 wheels and tires the same.

Bigger fronts keep the car from understeering.

All the same allows you to rotate the tires front/back/left/right. Big money saver on road courses.
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Old Nov 16, 2012 | 04:09 PM
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Ok that's what I thought, that makes sense.
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Old Nov 16, 2012 | 06:48 PM
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Originally Posted by Yellow95
All 4 wheels and tires the same.

Bigger fronts keep the car from understeering.

All the same allows you to rotate the tires front/back/left/right. Big money saver on road courses.
Not really

the fronts are -2* to -3* camber.

rear are -1.5 to -2* camber.

once a tire is set for a corner of the car, it best to leave it there.
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Old Nov 17, 2012 | 12:56 PM
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Originally Posted by ktlocklear
Thanks for the help everyone!

Which Chin event? I just did an event with Chin up here at Barber Motorsports Park
Sebring October.
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Old Nov 18, 2012 | 01:01 AM
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Originally Posted by AU N EGL

once a tire is set for a corner of the car, it best to leave it there.
For daily street driving..maybe, for track purposes the tires aren't on a corner longer enough for it to matter. I typically cross rotate my squared set-up after every two 30 minute sessions. I got 31 sessions out of a set of Nitto NT01's, and they wore very evenly.
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Old Nov 18, 2012 | 10:09 PM
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Many C5 Z06 guys I run with in NASA SE run 18" square set up with 275s Hoosiers. I've tried 295s and they hit my cooling ducts in the front on tight turns. I just tried this set up early this summer and am getting faster times and longer tire life. The other reason we run the 275s is to keep lower points in our running class.
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Old Nov 19, 2012 | 08:07 AM
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Originally Posted by ktlocklear
For daily street driving..maybe, for track purposes the tires aren't on a corner longer enough for it to matter. I typically cross rotate my squared set-up after every two 30 minute sessions. I got 31 sessions out of a set of Nitto NT01's, and they wore very evenly.
Nitto's are not an issue, Hoosiers are.
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Old Nov 20, 2012 | 10:51 AM
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Originally Posted by DansBlkonBlkZ06
Many C5 Z06 guys I run with in NASA SE run 18" square set up with 275s Hoosiers. I've tried 295s and they hit my cooling ducts in the front on tight turns. I just tried this set up early this summer and am getting faster times and longer tire life. The other reason we run the 275s is to keep lower points in our running class.
275/35's? 18x?
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Old Nov 20, 2012 | 09:35 PM
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Yes, 275 35Z R18s
I really like this set on all 4s.
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