STX Rules and Setup Questions - Page 18 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Auto-Hauss · 03-01-2013, 01:14 AM

Sorry if this has been asked before but is the Whiteline diff cradle bushings allowed in STX?

enjoyminutemaid · 03-01-2013, 01:25 AM

Quote:

Originally Posted by Auto-Hauss

Sorry if this has been asked before but is the Whiteline diff cradle bushings allowed in STX?

I think whataboutbob uses one in his stx build...

whataboutbob · 03-01-2013, 01:35 AM

Quote:

Originally Posted by enjoyminutemaid

I think whataboutbob uses one in his stx build...

I've got it on order, but it hasn't shown yet.
@Auto-Hauss

http://www.scca.com/assets/2013%20Solo%20Rules.pdf

14.8.D - "Differential mount bushings may be replaced but must attach in the
factory location(s) without additional modification or changes. Dif-
ferential position may not be changed. The amount of metal in a
replacement bushing may not be increased relative to the amount of
metal found in a standard bushing for the particular application. Solid
metal bushings are specifically prohibited."

Auto-Hauss · 03-01-2013, 09:33 AM

Quote:

Originally Posted by whataboutbob

I've got it on order, but it hasn't shown yet.
@Auto-Hauss

http://www.scca.com/assets/2013%20Solo%20Rules.pdf

14.8.D - "Differential mount bushings may be replaced but must attach in the
factory location(s) without additional modification or changes. Dif-
ferential position may not be changed. The amount of metal in a
replacement bushing may not be increased relative to the amount of
metal found in a standard bushing for the particular application. Solid
metal bushings are specifically prohibited."

My comprehension of the rule would make these illegal. The metal in the bushing increases and you can potentially change the mount point depending on which slot you use.

whataboutbob · 03-01-2013, 10:47 AM

Quote:

Originally Posted by Auto-Hauss

My comprehension of the rule would make these illegal. The metal in the bushing increases and you can potentially change the mount point depending on which slot you use.

Maybe. I haven't had a set to compare to the factory ones to see if there is a difference in the amount of metal. I'd say that although they offer an adjustment in the mounting location, if you keep the diff in the same place as the factory ones you aren't in violation.

The other Whiteline bushings I've put on the front LCA and steering rack didn't increase the amount of metal and that's why I am hesitant to say/agree that these will as well. I suspect that Whiteline is aware of the rules in SCCA as well and probably wants to provide upgrades that are legal to get sales.

:happy0180:

Auto-Hauss · 03-01-2013, 11:58 AM

Oh yeah I'm sure they want the autoX sales. I believe this is why they are the only company making RCA with bushings instead of ball joints. Its just a risk right now to install them without knowing if they are illegal. I don't want to buy another set of stock bushings. IMO it should be ruled as adding more metal. The stock bushing is nothing but rubber except the outside ring. But we'll see.

Cheers aswell!
:happy0180:

whataboutbob · 03-01-2013, 12:19 PM

Quote:

Originally Posted by Auto-Hauss

Oh yeah I'm sure they want the autoX sales. I believe this is why they are the only company making RCA with bushings instead of ball joints. Its just a risk right now to install them without knowing if they are illegal. I don't want to buy another set of stock bushings. IMO it should be ruled as adding more metal. The stock bushing is nothing but rubber except the outside ring. But we'll see.

Cheers aswell!
:happy0180:

Agreed. I'm not sure the stock one is only metal on the outside ring only as the other bushings I've replaced had a metal cylinder/sleeve where the mounting bolts went through.

Auto-Hauss · 03-01-2013, 12:36 PM

They do have a sleeve. I guess one could argue in favor of the Whiteline bushings to be legal based on that. Please post up a picture when you get them. The high res picture of them might over state how big the metal puck is on the inside of the bushing.

Also when you installed the subframe collars, did the subframe shift down(away from the car body) 5mm after everything was tightened?

GTB/ZR-1 · 03-07-2013, 11:33 AM

Okay, ran into an issue with rear camber--which, evidently, is not adjustable...

LR 1.79
RR 2.55 (!)

Any one else having this issue?

What LC arms do I need (it seems)?

RiskyTrousers · 03-07-2013, 11:39 AM

I went with the SPC lca. Does the job well, and it's affordable!

Here's a pic installed.

Scooby South · 03-07-2013, 11:56 AM

I will be going with Whitelines... But for now.. I adjusted it with Ride height..

Bill

GTB/ZR-1 · 03-07-2013, 12:15 PM

Quote:

Originally Posted by Scooby South

I will be going with Whitelines... But for now.. I adjusted it with Ride height..

Bill

Well, considering this was after corner bal/alignment--that would throw that out the window. Lol. I'm really scratching my head trying to figure out why such a disparity when ride height is very close. Bought car brand new & it's never been damaged. Strange & frustrating!

ABQautoxer · 03-07-2013, 12:42 PM

At stock height mine is symmetrical (-1.7) but when lowered to corner balance I was off by .3.

GTB/ZR-1 · 03-08-2013, 10:24 AM

So, if I don't get LC arms by event, should I chuck corner weight in favor of even rear camber?

03-07-2013, 11:33 AM	#247
GTB/ZR-1 Senior Member Join Date: Oct 2012 Drives: '13 BRZ in WRB--let's mod!!! Location: Central, FL Posts: 1,224 Thanks: 317 Thanked 449 Times in 262 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Okay, ran into an issue with rear camber--which, evidently, is not adjustable... LR 1.79 RR 2.55 (!) Any one else having this issue? What LC arms do I need (it seems)? __________________ * ‘23 Corolla GR—AutoX/DE toy * '13 Toyobaru P&L Turbo WRB BRZ SCCA XS-A build starting. SOLD * '22 Z51 Vette--sold. * '09 Nissan GT-R--gone, but not forgotten... 10.63 @ 131+ on streeties. * '90 ZR-1 11.0 @ 130.2 & 11.2 @ 132.4 sprayed 120 shot.

03-07-2013, 11:39 AM	#248
RiskyTrousers Senior Member Join Date: Nov 2011 Drives: '87 Corolla GTS, '13 FR-S 6MT Location: United States Posts: 364 Thanks: 54 Thanked 146 Times in 67 Posts Mentioned: 7 Post(s) Tagged: 0 Thread(s)	I went with the SPC lca. Does the job well, and it's affordable! Here's a pic installed. Last edited by RiskyTrousers; 03-08-2013 at 09:07 PM.

03-07-2013, 12:42 PM	#251
ABQautoxer Senior Member Join Date: Jun 2012 Drives: 2021 Supra / 2022 Tundra Location: Albuquerque, NM Posts: 659 Thanks: 60 Thanked 197 Times in 141 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	At stock height mine is symmetrical (-1.7) but when lowered to corner balance I was off by .3. __________________ TomR

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03-01-2013, 01:14 AM	#239
Auto-Hauss Senior Member Join Date: Jul 2012 Drives: 2013 Scion FR-S-Asphalt Location: Sin City Posts: 134 Thanks: 24 Thanked 42 Times in 29 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Sorry if this has been asked before but is the Whiteline diff cradle bushings allowed in STX?

03-01-2013, 11:58 AM	#244
Auto-Hauss Senior Member Join Date: Jul 2012 Drives: 2013 Scion FR-S-Asphalt Location: Sin City Posts: 134 Thanks: 24 Thanked 42 Times in 29 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Oh yeah I'm sure they want the autoX sales. I believe this is why they are the only company making RCA with bushings instead of ball joints. Its just a risk right now to install them without knowing if they are illegal. I don't want to buy another set of stock bushings. IMO it should be ruled as adding more metal. The stock bushing is nothing but rubber except the outside ring. But we'll see. Cheers aswell! :happy0180:

03-01-2013, 12:36 PM	#246
Auto-Hauss Senior Member Join Date: Jul 2012 Drives: 2013 Scion FR-S-Asphalt Location: Sin City Posts: 134 Thanks: 24 Thanked 42 Times in 29 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	They do have a sleeve. I guess one could argue in favor of the Whiteline bushings to be legal based on that. Please post up a picture when you get them. The high res picture of them might over state how big the metal puck is on the inside of the bushing. Also when you installed the subframe collars, did the subframe shift down(away from the car body) 5mm after everything was tightened?

03-08-2013, 10:24 AM	#252
GTB/ZR-1 Senior Member Join Date: Oct 2012 Drives: '13 BRZ in WRB--let's mod!!! Location: Central, FL Posts: 1,224 Thanks: 317 Thanked 449 Times in 262 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	So, if I don't get LC arms by event, should I chuck corner weight in favor of even rear camber?

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