Staggered for track? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

SavingManuals · 08-29-2013, 04:45 PM

Hey guys,

If I was to run 8.5s f and 9.5s r with a 235 front and 255 rear would this effect my handing enough to notice in terms of understeer? I'm trying to decide very soon, I've read a few other threads and people say only if trying to achieve a nice stance and don't intend on racing, but I'd like a racers opinion.

Thanks.

CSG Mike · 08-29-2013, 04:58 PM

The car is designed with square tires...

SavingManuals · 08-29-2013, 05:00 PM

Plans within the next year is to make 400hp, would a square still be the way to go?

Lauren · 08-29-2013, 05:02 PM

It will increase understeer/reduce oversteer. It will alter the balance of the car of course.

Not a fan of it myself. Remember driving an AW11 with 185s on the front and 215's (I think) on the rear (wheels from a MK3 MR2) on track. It just understeered everywhere. Not fun there really, was a tad frustrating. The GT86 doesn't understeer like an MR2 does as standard so I'm sure the effect won't be quite so bad, but more rear end grip will generally mean understeer. You may notice it even more when you lock the diff up.

mike the snake · 08-29-2013, 05:44 PM

You can go 265 square if you want. Lots of guys have done it, but you'll probably need coilovers for clearance.

Diode Dynamics · 08-29-2013, 05:46 PM

Square setup for the track...that's how the car was intended. Plus, I don't think you'll need extra rubber in back for traction when launching lol

Nick C.

swift996 · 08-29-2013, 05:56 PM

When the STI comes out it will have staggered tires...just like every sports car known to man. I run a 235/255 and don't have any noticeable understeer. I do however have coilovers and sway bars that are adjustable and have it set up pretty good. Feels very natural.

Joakim3 · 08-29-2013, 06:05 PM

Square.... the fact the car comes square enabling it to rotate around corners says it in itself. Fat rears would induce understeer (or in our case reduce oversteer) so for tracking purposes don't do it at your current power levels

Even if you go up to 400hp one could still argue that square would be fine (assuming you have 9"+ wide tires all around), but at that point I know I'd be going staggered as ~270 ft/tq in a ~2700lb car can lead to some nasty snap oversteer.. something going staggered can help tone down

08-29-2013, 04:45 PM	#1
SavingManuals Team Legacy Join Date: Jun 2013 Drives: LS swapped FRS, 5 speed Location: Caledonia, Ontario Posts: 229 Thanks: 12 Thanked 30 Times in 21 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Staggered for track? Hey guys, If I was to run 8.5s f and 9.5s r with a 235 front and 255 rear would this effect my handing enough to notice in terms of understeer? I'm trying to decide very soon, I've read a few other threads and people say only if trying to achieve a nice stance and don't intend on racing, but I'd like a racers opinion. Thanks. __________________ Team Legacy @timeattackrob @team_legacycc

08-29-2013, 05:00 PM	#3
SavingManuals Team Legacy Join Date: Jun 2013 Drives: LS swapped FRS, 5 speed Location: Caledonia, Ontario Posts: 229 Thanks: 12 Thanked 30 Times in 21 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Plans within the next year is to make 400hp, would a square still be the way to go? __________________ Team Legacy @timeattackrob @team_legacycc

08-29-2013, 05:02 PM	#4
Lauren Member Join Date: Jan 2010 Drives: 1985 AE86, 2013 GT86 Location: Gtr Manchester Posts: 92 Thanks: 5 Thanked 40 Times in 24 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	It will increase understeer/reduce oversteer. It will alter the balance of the car of course. Not a fan of it myself. Remember driving an AW11 with 185s on the front and 215's (I think) on the rear (wheels from a MK3 MR2) on track. It just understeered everywhere. Not fun there really, was a tad frustrating. The GT86 doesn't understeer like an MR2 does as standard so I'm sure the effect won't be quite so bad, but more rear end grip will generally mean understeer. You may notice it even more when you lock the diff up. __________________ 1985 AE86 Sprinter Trueno 2013 GT86 White Leather, MT Injen intake, Milltek Exhaust

08-29-2013, 05:46 PM	#6
Diode Dynamics Join Date: Aug 2012 Drives: 2013 Scion FR-S Location: St. Louis, Missouri Posts: 2,770 Thanks: 1,503 Thanked 1,761 Times in 877 Posts Mentioned: 197 Post(s) Tagged: 5 Thread(s)	Square setup for the track...that's how the car was intended. Plus, I don't think you'll need extra rubber in back for traction when launching lol Nick C. __________________ John C. Diode Dynamics Follow Us: FB // IG // YT // TikTok

08-29-2013, 05:56 PM	#7
swift996 Senior Member Join Date: Nov 2011 Drives: Subaru BRZ Limited 6MT Location: Winston-Salem, NC Posts: 2,432 Thanks: 712 Thanked 954 Times in 545 Posts Mentioned: 47 Post(s) Tagged: 0 Thread(s)	When the STI comes out it will have staggered tires...just like every sports car known to man. I run a 235/255 and don't have any noticeable understeer. I do however have coilovers and sway bars that are adjustable and have it set up pretty good. Feels very natural. __________________ Innovate Supercharged Black Limited BRZ 6-Speed MT(Build Thread) 2010 Cadillac CTS-V Sedan M6 w/550whp (Build Thread)

08-29-2013, 04:58 PM	#2
CSG Mike Join Date: Jul 2012 Drives: S2000 CR Location: Orange County Posts: 14,533 Thanks: 8,920 Thanked 14,178 Times in 6,835 Posts Mentioned: 966 Post(s) Tagged: 14 Thread(s)	The car is designed with square tires...

08-29-2013, 05:44 PM	#5
mike the snake Senior Member Join Date: Jul 2013 Drives: 2013 BRZ Location: Norcal Posts: 1,592 Thanks: 1 Thanked 623 Times in 378 Posts Mentioned: 15 Post(s) Tagged: 0 Thread(s)	You can go 265 square if you want. Lots of guys have done it, but you'll probably need coilovers for clearance.

08-29-2013, 06:05 PM	#8
Joakim3 Senior Member Join Date: May 2013 Drives: 04' Saab 9-5 Aero Location: Elkridge, MD Posts: 602 Thanks: 7 Thanked 198 Times in 136 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Square.... the fact the car comes square enabling it to rotate around corners says it in itself. Fat rears would induce understeer (or in our case reduce oversteer) so for tracking purposes don't do it at your current power levels Even if you go up to 400hp one could still argue that square would be fine (assuming you have 9"+ wide tires all around), but at that point I know I'd be going staggered as ~270 ft/tq in a ~2700lb car can lead to some nasty snap oversteer.. something going staggered can help tone down __________________ _____________________ You know what they say... pick two: cheap, fast, reliable.

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