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10-27-2013, 08:37 AM
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#1 |
 Drives: ZL1 Join Date: Sep 2013
Location: GTA
Posts: 39
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Square tire setup
Anybody done a square tire setup similar to the 1le? I do a lot of road course tracking and just looking for options and thoughts on the setup. Not sure if the ZL1 will like smaller tires out back. But im thinking it might help with understeer.
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10-28-2013, 09:48 PM
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#2 |
Drives: 2013 Camaro ZL1 Join Date: May 2013
Location: Vancouver BC
Posts: 47
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With correct wheel offset and size, I don't think there should be any issues. I run 295 squared all around 10.1" in width compared to the stock rear at 11.5". The car does feel more balanced. Less understeer squeal for sure.
I dropped 2.7 seconds in lap time in track condition of 8 degree C compared to oem goodyears 285/305 with 25 C.
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LSA VR38DETT 4B11 2ZZ-GE-SC N55 B18C5 302
Last edited by MPR; 10-30-2013 at 06:56 PM. Reason: more info |
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10-29-2013, 01:38 AM
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#3 |
 Drives: 2013 ZL1 Vert Auto IOM Join Date: May 2012
Location: Alberta
Posts: 389
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theres no benefit to reducing your rear tire size i would recommend 295/315
you may get the illusion of a more balanced car, but you would just be giving up rear end traction and make your car more prone to oversteer, the real benefit would come from improved front end traction but theres no reason to reduce the rear end traction |
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10-30-2013, 12:23 PM
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#4 |
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Drives: ZL1 Join Date: Sep 2013
Location: GTA
Posts: 39
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i guess im gonna try and find a way to fit 305's in front
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10-30-2013, 05:24 PM
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#5 |
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Drives: 2013 Camaro ZL1 Join Date: May 2013
Location: Vancouver BC
Posts: 47
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^ I won't recommend that unless you want your tires to stick out quite abit.
295 Michelin PSS is a good size for front tires.
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LSA VR38DETT 4B11 2ZZ-GE-SC N55 B18C5 302
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10-30-2013, 06:11 PM
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#6 |
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HAMMER PILOT
Drives: 13 ZL1#182, 85 CJ7, 16 Silverado Join Date: Nov 2011
Location: Tucson AZ
Posts: 4,386
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The ZL1 suspension was tuned to the staggered, not sure how a square setup will effect it.
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 "DO YOU WANT ME TO PUT THE HAMMER DOWN?" |
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10-31-2013, 09:36 PM
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#7 |
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Drives: '67 Z28 Join Date: Sep 2013
Location: San Diego, CA
Posts: 16
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Re: fitting 305s in front-
By dialing in some negative camber in front, the car should gain some room outboard for wider wheel/tire. For those that have max'd out negative camber in front (-2 or -2.5?) how much room is left inboard at that point? If there's still a 1/4" inboard, the camber should add 1/4" more room outboard, suggesting at least a 295 could fit on a 10.5" wheel without sticking out further (at the top) than stock. If you can get there, a 305 should be possible?
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--Jason Rhoades http://www.rhoadescamaro.com/build
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10-31-2013, 09:55 PM
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#8 |
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USAF retired! Thank God!
Drives: 2011 1SS, 1LT red,1LT/RS SGM 98Z28 Join Date: Jul 2011
Location: North Texas
Posts: 2,799
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305/30 R19s on all 4 corners here with the ability to to -3.0 deg camber in front with just 4 bolts and 5 minutes. Justice Pete FTW
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10-31-2013, 09:59 PM
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#9 | |
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USAF retired! Thank God!
Drives: 2011 1SS, 1LT red,1LT/RS SGM 98Z28 Join Date: Jul 2011
Location: North Texas
Posts: 2,799
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Quote:
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10-31-2013, 10:00 PM
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#10 |
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Drives: '67 Z28 Join Date: Sep 2013
Location: San Diego, CA
Posts: 16
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The car can get -3 with the stock adjusters?
What wheel width and offset or backspace did Pete use with the 305 19s?
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--Jason Rhoades http://www.rhoadescamaro.com/build
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11-01-2013, 11:09 AM
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#11 | |
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Speed Freak
Drives: 2013 ZL1 Camaro, 2016 Camaro SS Join Date: Jun 2013
Location: Ardmore, OK
Posts: 2,637
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Quote:
The only benefit to putting on a narrower tire is the ability to rotatate the tires. Unless you can get a much stickier tread compound only in the narrow size. My track tires wear slightly faster in the rear and way faster on the right side of the car due to the dominant direction of track flow. I can rotate the tires left to right and get good wear out of all of the tires. I have just resigned that if I'm going to track the car I'm going to have to buy a lot of tire and brake parts. I'm 295 front and 315 rear. It works pretty well. I understeer if I brake to late and oversteer if I get on the throttle to early. It is very controllable.
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2016 SS -AGP twin Borg Warner 7163 EFR's, LT4 mechanical pump, LT4 injectors, Walbro 255 low side, Castrol SRF. 734whp/759 tq
2013 ZL1 -ADM - 427 LSX 6 bolt, O-ringed block built by LME. Twin PT6466 turbos. RPM custom manual trans, RPS Quad carbon clutch, 9" Hendrix rear diff & axles. ADM/squash fuel system, Ron Davis radiator, Spal fans, AGP air to air, turbo plumbing. LPE oil cooler, rear bushing upgrade, roll bar...etc. rwhp 1400+... 212.5mph, best Texas mile to date.  |
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11-01-2013, 01:18 PM
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#12 | |
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Drives: ZL1 Join Date: Sep 2013
Location: GTA
Posts: 39
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Quote:
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11-01-2013, 01:24 PM
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#13 | |
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Drives: '67 Z28 Join Date: Sep 2013
Location: San Diego, CA
Posts: 16
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[QUOTE=gmdoctor;7147992]
Quote:
You have 5-7mm more clearance outboard now, add that to remaining inboard clearance, plus whatever factory outboard clearance was provided.
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--Jason Rhoades http://www.rhoadescamaro.com/build
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11-29-2013, 10:02 PM
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#14 |
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Drives: ZL1 Join Date: Sep 2013
Location: GTA
Posts: 39
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Sorry to bring this back from the dead.
Had a chance to measure wheel to strut clearance with maxed out camber(-2.0) at roughly 10mm. Aint much, looks like anyone wanting larger front wheels has to go out, no room left inboard. Makes sense when you compare the z28 sizes and offsets |
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