follow ft86club on our blog, twitter or facebook.
FT86CLUB
Ft86Club
86SPEED
Register Garage Members List Calendar Search Today's Posts Mark Forums Read

Go Back   Scion FR-S Forum | Subaru BRZ Forum | Toyota 86 GT 86 Forum | AS1 Forum - FT86CLUB > Technical Topics > Suspension | Chassis | Brakes -- Sponsored by 949 Racing

Suspension | Chassis | Brakes -- Sponsored by 949 Racing Relating to suspension, chassis, and brakes. Sponsored by 949 Racing.


User Tag List

Reply
 
Thread Tools Search this Thread
Old 01-13-2019, 03:11 PM   #1
Mikefarr
Junior Member
 
Join Date: Jan 2019
Drives: Toyota GT86
Location: Malta
Posts: 5
Thanks: 0
Thanked 2 Times in 1 Post
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Suspension position sensors

I am planning to install a set of four suspension position sensors on my GT86. My suspension is all stock. Any idea what length should I get and were are they best mounted ?
Mikefarr is offline   Reply With Quote
Old 01-13-2019, 04:14 PM   #2
humfrz
Senior Member
 
Join Date: May 2013
Drives: 2013 FR-S, white, MT
Location: Puyallup, WA
Posts: 19,218
Thanks: 13,387
Thanked 17,160 Times in 9,417 Posts
Mentioned: 465 Post(s)
Tagged: 2 Thread(s)
Quote:
Originally Posted by Mikefarr View Post
I am planning to install a set of four suspension position sensors on my GT86. My suspension is all stock. Any idea what length should I get and were are they best mounted ?
Hi ya Mikefarr and welcome to our group -

Oh, sorry, I must ask - why do you want to do that, since the GT86 has a passive suspension?


humfrz
humfrz is offline   Reply With Quote
Old 01-13-2019, 06:06 PM   #3
Captain Snooze
Because compromise
 
Captain Snooze's Avatar
 
Join Date: Jan 2012
Drives: Red Herring
Location: australia
Posts: 4,959
Thanks: 2,363
Thanked 4,403 Times in 2,090 Posts
Mentioned: 43 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by humfrz View Post
Hi ya Mikefarr and welcome to our group -

Oh, sorry, I must ask - why do you want to do that, since the GT86 has a passive suspension?

Do you mean non-adjustable suspension? To me active suspension means the damping is controlled from external source like Audi's Magnetic Ride and passive is what most cars use which is different from adjustable damping.


[/pedant]
__________________
My car is completely stock except for all the mods.

Captain Snooze is offline   Reply With Quote
Old 01-13-2019, 08:34 PM   #4
Mr.ac
[insert cool phrase here]
 
Mr.ac's Avatar
 
Join Date: Aug 2015
Drives: BRZ Premium
Location: Central Coast CA
Posts: 1,596
Thanks: 358
Thanked 859 Times in 539 Posts
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
What?

For shits and giggles could you post a picture of these "sensors" you want to install?
Or a link to where you bought them?
__________________
New daily driver - Subaru BRZ Premium
Weekend fun/track car - '91 MR2 Turbo Gen3
Old daily driver - '88 MR2 Supercharged
Mr.ac is offline   Reply With Quote
Old 01-13-2019, 08:58 PM   #5
BlueWhelan
Member
 
BlueWhelan's Avatar
 
Join Date: Apr 2017
Drives: 2013 Blue Subaru BRZ. 6 Spd manual
Location: Thousand Oaks, CA
Posts: 43
Thanks: 15
Thanked 28 Times in 21 Posts
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
OP is gonna have to be a lot more specific in what he's asking. I assume the OP is referring sensors that track the movement of suspension components under load. My question is, why does the OP need to be measuring his suspension in this way?

Whatever the reason, the cost can be...uh...exorbitant.
BlueWhelan is offline   Reply With Quote
The Following User Says Thank You to BlueWhelan For This Useful Post:
humfrz (01-15-2019)
Old 01-13-2019, 09:01 PM   #6
jamal
Senior Member
 
jamal's Avatar
 
Join Date: Nov 2011
Drives: Legacy GT
Location: compton
Posts: 495
Thanks: 9
Thanked 309 Times in 180 Posts
Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by Mr.ac View Post
What?

For shits and giggles could you post a picture of these "sensors" you want to install?
Or a link to where you bought them?


You can use them to do things like calculate downforce, measure body roll, tell you if you're bottoming out the suspension, if they sample fast enough they can help you make damper adjustments, etc. Could probably even derive things like cg and roll center heights.

I'm not sure what you'd get from putting them on a car with stock suspension. It has some sort of a data aq system but stock struts and springs? I suppose it would give you a baseline before changing things.

But if you're going to be adding these, you can't take the wheels off and stick a measuring tape on a few things to decide what to get and where to put them?

Last edited by jamal; 01-14-2019 at 01:31 AM.
jamal is offline   Reply With Quote
The Following 3 Users Say Thank You to jamal For This Useful Post:
strat61caster (01-14-2019), wparsons (01-13-2019), yberther (01-16-2019)
Old 01-14-2019, 04:40 PM   #7
strat61caster
Thread Killer
 
strat61caster's Avatar
 
Join Date: Nov 2012
Drives: '13 FRS
Location: SF Bay Area
Posts: 8,564
Thanks: 11,657
Thanked 7,717 Times in 4,017 Posts
Mentioned: 71 Post(s)
Tagged: 3 Thread(s)
https://www.ft86club.com/forums/showthread.php?t=26661

Suspension Travel:
Bump Travel = 2.5 in or 0.1 m
Rebound Travel = 3.5 in or 0.15 m


I'd get around 6" of travel on the sensors, find someone who can weld a tab on the upper spring perch and the lower spring perch, allow the sensor to rotate and such to account for the strut movement but it's pretty simple standalone and you're getting true shock motion out of it which can easily be extrapolated to wheel motion with some of the other parameters in that thread.

Good luck.
__________________
Quote:
Originally Posted by Guff View Post
ineedyourdiddly
strat61caster is offline   Reply With Quote
Old 01-14-2019, 05:58 PM   #8
Mikefarr
Junior Member
 
Join Date: Jan 2019
Drives: Toyota GT86
Location: Malta
Posts: 5
Thanks: 0
Thanked 2 Times in 1 Post
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Thanks everyone for input. What I am after is something like jamal posted. they are on the market with various lengths and stokes. Just need to choose the correct size for front and rear. They are not cheep actually but I would like to be able to log how the suspension is behaving. It gives you an idea also when a wheel is lifting and loosing traction or just grip.
Jamal is that an FR-S suspension? I prefer if I can mount them without having to weld to the suspension arms. I am afraid that the welding will create a stress point from where the arm may fail.
Mikefarr is offline   Reply With Quote
Old 01-14-2019, 06:03 PM   #9
Mikefarr
Junior Member
 
Join Date: Jan 2019
Drives: Toyota GT86
Location: Malta
Posts: 5
Thanks: 0
Thanked 2 Times in 1 Post
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by strat61caster View Post
https://www.ft86club.com/forums/showthread.php?t=26661

Suspension Travel:
Bump Travel = 2.5 in or 0.1 m
Rebound Travel = 3.5 in or 0.15 m


I'd get around 6" of travel on the sensors, find someone who can weld a tab on the upper spring perch and the lower spring perch, allow the sensor to rotate and such to account for the strut movement but it's pretty simple standalone and you're getting true shock motion out of it which can easily be extrapolated to wheel motion with some of the other parameters in that thread.

Good luck.
This makes sens. Is that travel for both front and rear?
Mikefarr is offline   Reply With Quote
Old 01-14-2019, 10:16 PM   #10
strat61caster
Thread Killer
 
strat61caster's Avatar
 
Join Date: Nov 2012
Drives: '13 FRS
Location: SF Bay Area
Posts: 8,564
Thanks: 11,657
Thanked 7,717 Times in 4,017 Posts
Mentioned: 71 Post(s)
Tagged: 3 Thread(s)
Quote:
Originally Posted by Mikefarr View Post
This makes sens. Is that travel for both front and rear?
Not sure, ultimately getting your car in the air taking the springs off and measuring for yourself is the absolute best solution as mentioned above, it's understandable to want to minimize downtime for your car but in this case taking the longer path to make sure you do it right will pay off when it comes to science experiments.
__________________
Quote:
Originally Posted by Guff View Post
ineedyourdiddly
strat61caster is offline   Reply With Quote
Old 01-14-2019, 10:31 PM   #11
lamawithonel
Member
 
Join Date: Mar 2014
Drives: 2014 Subaru BRZ Ltd.
Location: Mid-Atlantic
Posts: 48
Thanks: 90
Thanked 35 Times in 20 Posts
Mentioned: 0 Post(s)
Tagged: 1 Thread(s)
GSpeed did this on their track car. Here's the post from their journal thread.
https://www.ft86club.com/forums/show...7&postcount=26
__________________
*question everything*learn something*answer nothing*
lamawithonel is offline   Reply With Quote
The Following 4 Users Say Thank You to lamawithonel For This Useful Post:
kch (01-15-2019), Racecomp Engineering (01-15-2019), strat61caster (01-14-2019), wparsons (01-17-2019)
Old 01-15-2019, 07:37 PM   #12
Mikefarr
Junior Member
 
Join Date: Jan 2019
Drives: Toyota GT86
Location: Malta
Posts: 5
Thanks: 0
Thanked 2 Times in 1 Post
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Thanks again for input. Now I have a clearer idea of way forward.
Mikefarr is offline   Reply With Quote
Old 01-15-2019, 07:55 PM   #13
AFRichZC6
Senior Member
 
AFRichZC6's Avatar
 
Join Date: Jan 2014
Drives: BRZ
Location: Bay Area, CA
Posts: 176
Thanks: 83
Thanked 102 Times in 61 Posts
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
You're referring to linear shock potentiometers. Depending on how accurate you need your data and how much resolution you need, you could also choose to run shorter shock pots and mount them slightly more inboard rather than trying to get a 1:1 measurement. This could open up some more mounting options. Also depending on what you want the data to be displayed, you'll just have to account for the installation to shock/wheel travel ratio.

Where are you getting your sensors from, and what setup are you using for datalogging?
AFRichZC6 is offline   Reply With Quote
The Following 2 Users Say Thank You to AFRichZC6 For This Useful Post:
Racecomp Engineering (01-15-2019), wparsons (01-17-2019)
Old 01-15-2019, 08:07 PM   #14
Mikefarr
Junior Member
 
Join Date: Jan 2019
Drives: Toyota GT86
Location: Malta
Posts: 5
Thanks: 0
Thanked 2 Times in 1 Post
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
AFRichZC6,
I have not decided yet which sensors to use. They are a bit expensive so better think twice.
For data logging I have built my own. All other inputs come from CAN apart from an IMU and GPS for which I have a module incorporated on the PCB with external antenna. This will be the first analog inputs.
Mikefarr is offline   Reply With Quote
The Following 2 Users Say Thank You to Mikefarr For This Useful Post:
AFRichZC6 (01-16-2019), Racecomp Engineering (01-15-2019)
 
Reply

Tags
sensors, suspension

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Recaro Pole position timandytimandy Interior Parts (Incl. Lighting) 1 08-30-2017 11:40 AM
Recaro Pole Position Gliderx Tracking / Autocross / HPDE / Drifting 1 04-06-2016 07:07 PM
What position do you sit in FR-S/BRZ??? cry7670 Scion FR-S / Toyota 86 GT86 General Forum 25 05-09-2015 12:08 PM
Throttle Position question NoFear99 Engine, Exhaust, Transmission 8 06-07-2013 08:25 AM
Headrest position Sigh-on-Rice Scion FR-S / Toyota 86 GT86 General Forum 2 06-15-2012 01:28 PM


All times are GMT -4. The time now is 05:29 AM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Garage vBulletin Plugins by Drive Thru Online, Inc.