|
Tracking / Autocross / HPDE / Drifting What these cars were built for! |
|
Thread Tools | Search this Thread |
03-30-2021, 03:29 PM | #1 |
Senior Member
Join Date: Jun 2012
Drives: Nevermorange FRS
Location: Seattle, WA
Posts: 4,160
Thanks: 755
Thanked 4,200 Times in 1,803 Posts
Mentioned: 77 Post(s)
Tagged: 1 Thread(s)
|
What typically changes alignment if nothing bends?
For those of us that track or race these cars - we sometimes leave the course, bang a curb or worse - bang into other cars.
When I got punted into Totemo, the nose of my car was taken off by his fender/door and very little contact was made to either of our tires. However both of our cars had misaligned toe. Nothin is visibly bent or out of shape on either car. He did a toe adjustment at the track and everything spec'd out fine after that and I haven't tried to adjust mine since it's in pieces but I'm curious... If the toe change isn't the result of something changing shape - what else is likely the culprit? Subframe, pick up point for LCA moved off center? Or is something bent and it's just not discernable by the eye?
__________________
SCCA T4 - FRS
|
03-30-2021, 03:55 PM | #2 |
Senior Member
Join Date: Jan 2018
Drives: Crapcan
Location: Oregon
Posts: 11,162
Thanks: 18,155
Thanked 16,322 Times in 7,380 Posts
Mentioned: 107 Post(s)
Tagged: 0 Thread(s)
|
I am not sure, but even over the course of doing a few track days my wheel starts to go off center. I'd guess possibly subframe shifting but I don't really know, I have considered paint marking the subframe where it mounts to see if it is shifting.
__________________
"Experience is the hardest kind of teacher. It gives you the test first and the lesson afterward." -Oscar Wilde.
|
The Following User Says Thank You to NoHaveMSG For This Useful Post: | rice_classic (03-31-2021) |
03-30-2021, 05:14 PM | #3 |
Barred
Join Date: Oct 2020
Drives: My18 wrxsti My19 brzts
Location: Botany Bay
Posts: 1,144
Thanks: 729
Thanked 1,187 Times in 610 Posts
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
|
I think crush tubes and bolts take up the small play they have in a different position.
__________________
Wait until my Flex capacitor hits 88
|
The Following User Says Thank You to gen3v8 For This Useful Post: | rice_classic (03-31-2021) |
03-31-2021, 01:35 AM | #4 |
Senior Member
Join Date: Dec 2015
Drives: Track preped NA FRS
Location: Montreal, Canada
Posts: 987
Thanks: 1,056
Thanked 680 Times in 405 Posts
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
|
Usually bolts and anything threaded slipping ever so slightly. It doesnt take much for the toe to get out of whack at the front. Also, even if not visible, the whole front of the car is a crumple zone, it can very well bent and move without it being visible at the naked eye by very small impacts.
My alignment doesnt change very much (or at all) with track usage, even when hitting/jumping curbs regularly, but it does shift every time I've hit a wall (some hard, some small bumps or grazes). |
The Following User Says Thank You to Icecreamtruk For This Useful Post: | rice_classic (03-31-2021) |
03-31-2021, 12:08 PM | #5 |
For what it's worth, my OEM 14mm "crash" bolts did not come loose after a rally-x...
The OEM rear toe arms don't inspire me with confidence...I have mine back on the car temporarily so I've been keeping an eye on them. I've been doing a ton of alignments recently and have not noticed issues with front tie rods. On the other hand, I've seen loose jam nuts on aftermarket toe arms and lower control arms somewhat frequently. I don't know if they weren't torqued properly initially or if that's the result of vibration and general abuse. I'm trying to get in the habit of marking my nuts, and I'm thinking about a few other real solutions. A 2 nut combo properly installed in some locations and maybe nylon locking nuts in others (where I won't hate myself if I have to remove them). - Andrew |
|
04-02-2021, 09:27 AM | #6 |
Senior Member
Join Date: Nov 2019
Drives: 2020 Hakone
Location: Fairfax, VA
Posts: 149
Thanks: 45
Thanked 70 Times in 51 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
|
If you're trying to keep a fastener from backing off, I use Loctite. Things that stay on for a long time get red, blue for things I'm likely to take apart soon. Before someone repeats what the package says, the difficulty in removing a nut with red Loctite is overstated. For the subframe you might try a shot of paint on one of the surfaces, then assemble while wet. It will both help keep things where you put them and visually indicate if they've moved.
__________________
-- Bryan Blackwell --
2020 Hakone 86 -- KW V2 6k&9k/Karcepts Sway Bars/SPC&Diftech RCLA/SuperPro bshngs/17x9 RPF1/255-40-17 RT660/Hawk5.0 Pads/RacerX MC Brace |
04-02-2021, 02:17 PM | #7 | |
Senior Member
Join Date: Jan 2018
Drives: Crapcan
Location: Oregon
Posts: 11,162
Thanks: 18,155
Thanked 16,322 Times in 7,380 Posts
Mentioned: 107 Post(s)
Tagged: 0 Thread(s)
|
Quote:
__________________
"Experience is the hardest kind of teacher. It gives you the test first and the lesson afterward." -Oscar Wilde.
|
|
The Following 2 Users Say Thank You to NoHaveMSG For This Useful Post: | Racecomp Engineering (04-02-2021), SCFD (04-02-2021) |
04-02-2021, 09:06 PM | #8 | |
Senior Member
Join Date: Sep 2020
Drives: FR-S
Location: USA
Posts: 171
Thanks: 313
Thanked 70 Times in 50 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
|
Quote:
Are you using stock LCAs / lock nuts? |
|
04-02-2021, 09:51 PM | #9 |
Senior Member
Join Date: Jan 2018
Drives: Crapcan
Location: Oregon
Posts: 11,162
Thanks: 18,155
Thanked 16,322 Times in 7,380 Posts
Mentioned: 107 Post(s)
Tagged: 0 Thread(s)
|
__________________
"Experience is the hardest kind of teacher. It gives you the test first and the lesson afterward." -Oscar Wilde.
|
The Following User Says Thank You to NoHaveMSG For This Useful Post: | SCFD (04-03-2021) |
|
|
|
|