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Tracking / Autocross / HPDE / Drifting What these cars were built for!


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Old 01-21-2022, 09:44 AM   #127
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Originally Posted by DocWalt View Post
Would also be nice to go bolt to bolt on the subframe too
I'm not sure that they changed the subframe mount points, but just extended the rear suspension bits by 10mm.

I made a mistake in my previous statement. let me go back and fix it.

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Old 01-21-2022, 10:03 AM   #128
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I thought the changes were at the knuckle side according to CSG Mike?
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Old 01-21-2022, 10:16 AM   #129
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I must have missed that post. A quick glance at the parts page shows the RLCA and knuckle being the parts specific to the 2022. I suppose my idea was wrong. However with the only change in the RLCA being that the hole moved outboard 10mm, my shock is now where it would have been on the previous model.

After some digging, I found this post by MikeCSG that states the rear measurements are identical with the change being in the rear quarter panel. In a post on the next page, he attributes the track width increase to the wheel width increase. So it looks like my theory was totally wrong.

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Old 01-21-2022, 01:44 PM   #130
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Originally Posted by dragoontwo View Post


Like a flip chip for mountain bike geometry...
The Cusco rear arms have a flippable thing that changes the motion ratio.



The arms still use a pillowball so not legal but just showing what it looks like.

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Old 01-21-2022, 02:30 PM   #131
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Quote:
Originally Posted by dragoontwo View Post
After some digging, I found this post by MikeCSG that states the rear measurements are identical with the change being in the rear quarter panel. In a post on the next page, he attributes the track width increase to the wheel width increase.
But the '1720 PP wheels were also 7.5" wide, and neither of those brochures call out a different track with for PP models.
I thought track width is measured from the center of the tire tread to the center of another tire tread, so it shouldn't change with wheel/tire width, assuming the same wheel offset?
Then also why 10 mm, not 12 or 13?

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dimensionally identical, when it comes to track width
That being said, I have no idea how track width is measured by manufacturers, down to the millimeter.
Could be more what you'd call a "guideline" ballpark number than an actual precise measurement.
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Old 01-21-2022, 02:59 PM   #132
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I'm guessing the track width for the brochure is probably measured in the CAD models. You certainly can get a nominal measurement that is way more precise than 1 mm.
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Old 01-24-2022, 05:39 PM   #133
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Being the wheels are 7.5 wide all around, why don't they claim the front track being wider?
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Old 01-24-2022, 07:10 PM   #134
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Being the wheels are 7.5 wide all around, why don't they claim the front track being wider?
I assumed they measure based on the wheel hub as there was no track width change on the special edition cars with 7.5’s iirc.

The wheel isn’t centered on its mating surface to the car so wider wheels do not necessarily result in no change to track width as measuring wheel center to wheel center.
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Old 01-26-2022, 12:49 PM   #135
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Stupid question time.

Double checked the rules, but I figured I'd ask to double check. As Subaru has no "Manufacturer" camber bolts for the BRZ as defined in 13.8.E, aftermarket camber bolts are also a no, correct? How does one realistically get any front camber on these besides loosening everything and using the hole tolerances to get camber?
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Old 01-26-2022, 01:00 PM   #136
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Stupid question time.

Double checked the rules, but I figured I'd ask to double check. As Subaru has no "Manufacturer" camber bolts for the BRZ as defined in 13.8.E, aftermarket camber bolts are also a no, correct? How does one realistically get any front camber on these besides loosening everything and using the hole tolerances to get camber?
Factory "crash" bolts. Basically the lower 14mm bolts placed into the top 16mm holes. They're pretty cheap at the dealer.

I'm not sure if these are legal though.
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Old 01-26-2022, 01:07 PM   #137
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Factory "crash" bolts. Basically the lower 14mm bolts placed into the top 16mm holes. They're pretty cheap at the dealer.

I'm not sure if these are legal though.

That was my guess at the moment.
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Old 01-26-2022, 03:12 PM   #138
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They're legal. same part number as the 1st gen cars. Its in the service manual.
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Old 02-08-2022, 10:29 AM   #139
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Has anyone gotten a letter written to STAC regarding the RCLA's?
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Old 02-08-2022, 10:32 AM   #140
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Has anyone gotten a letter written to STAC regarding the RCLA's?
And ask for what? I'm not asking to be controversial, just truly curious - the STAC won't make allowances for a single car
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