Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB
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Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB (https://www.ft86club.com/forums/index.php)
-   Tracking / Autocross / HPDE / Drifting (https://www.ft86club.com/forums/forumdisplay.php?f=39)
-   -   OEM Crash Bolts, top and bottom (https://www.ft86club.com/forums/showthread.php?t=103809)

Fish Eagle 04-01-2016 03:55 AM
OEM Crash Bolts, top and bottom
 
Anyone running OEM crash bolts top and bottom on the track?
I'd be interested to hear your observations and opinions.

I've run crash bolts in top hole only (-1.3°) for 2 years (28 track days) but I'd like a bit more camber and I don't want to go the coilover route.

scirocco78 04-01-2016 06:50 AM
The OEM bottom bolt is the same as the crash bolt you put in the top.

Fish Eagle 04-01-2016 08:11 AM
Quote:
Originally Posted by scirocco78 (Post 2606391)
The OEM bottom bolt is the same as the crash bolt you put in the top.
Oh, I didn't know that.
Thanks. So I guess that plan won't work... :)

ka-t_240 04-01-2016 10:38 AM
You could look into aftermarket tophats.


Are you still on stock struts and springs?

jawn 04-01-2016 10:39 AM
Or just use aftermarket camber bolts in addition to the OEM crash bolts.

flais 04-01-2016 10:54 AM
Yes, I'm running SPC bolts top and bottom with the Swift Spec-R springs, aligned to -2.5 degrees camber. It's probably not the best setup long term since the overall bolt diameter is lower than normal, but at least they are high grade bolts.

Since moving from just lower camber bolts to both upper and lower in october, I've only done 3 track days, 4 time attacks, and 2 autocrosses. One of the time attacks I went sideways into the curbing hard enough to fold in the rocker panel, and the bolts held up.

Cartman 04-01-2016 11:11 AM
Quote:
Originally Posted by flais (Post 2606564)
Yes, I'm running SPC bolts top and bottom with the Swift Spec-R springs, aligned to -2.5 degrees camber. It's probably not the best setup long term since the overall bolt diameter is lower than normal, but at least they are high grade bolts.

Since moving from just lower camber bolts to both upper and lower in october, I've only done 3 track days, 4 time attacks, and 2 autocrosses. One of the time attacks I went sideways into the curbing hard enough to fold in the rocker panel, and the bolts held up.
I have this exact same setup, running -2.3 degrees. have done 6 track events and DD my car with this setup without issues.

finch1750 04-01-2016 11:27 AM
I can also vouch for the SPC bolts on the bottom as well.

But Toyota does make OEM crash bolts in different sizes if you need it for legality/classes rules. The MR2 Slyder guys I have seen run multiple at times but cant give feedback on slipping (though I havent seen anyone complain).

12mm: 90105-14147
13mm: 90105-14146

Its wierd cuz the 14mm bolt is different part numbers for the FRS and the older cars but these bolts are generic across the Toyota line. Dont see why it wouldn't work but again all this is just searching google and the spyder forums so ymmv

And actually curious why nobody tried this in CS lol.

SeanRTR 04-01-2016 12:34 PM
Quote:
Originally Posted by finch1750 (Post 2606622)
And actually curious why nobody tried this in CS lol.

Rules are very clear, you can only use the Subaru part # nothing aftermarket/SPC

finch1750 04-01-2016 12:41 PM
Quote:
Originally Posted by SeanRTR (Post 2606771)
Rules are very clear, you can only use the Subaru part # nothing aftermarket/SPC
I just listed multiple size Toyota OEM part numbers with different size bolts that would work in the lower hole as well as the upper hole.

Or does it specifically have to be an option for that car?

edit: nevermind. read the fule and it has to be factory way of adjustment so that would be car specific.

troek 04-07-2016 08:48 AM
Ive ran double crash bolts. Did for about 8 hours on Fuji speedway, never had an issue.

mb_ 04-08-2016 12:31 AM
I'm running the OEM crash bolts on top, SPC camber bolts on the bottom. I was able to get -2.1 of camber on stock suspension.

Joe-G 04-08-2016 01:44 AM

Joesurf79 12-16-2016 02:57 PM
Have SPC bolts in the top holes up front, and got roughly -1.0 degree on each side. SPC 14mm camber bolts en route for the lower holes. Looking for that -2.5 deg sweet spot... Anyone think that will be doable with the SPC bolts in both holes?


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