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

Go Back   Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - 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 10-06-2019, 02:23 AM   #29
BlueWhelan
Senior Member
 
BlueWhelan's Avatar
 
Join Date: Apr 2017
Drives: 2013 Blue Subaru BRZ. 6 Spd manual
Location: Thousand Oaks, CA
Posts: 201
Thanks: 137
Thanked 155 Times in 94 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Hey @norcalpb and @7 skulls, can you provide an update on the pedders hats? How are they holding up? Any additional noise, problems to report?
BlueWhelan is offline   Reply With Quote
Old 10-06-2019, 03:08 PM   #30
7 skulls
Senior Member
 
Join Date: Jul 2015
Drives: 2014 scion frs
Location: Newfoundland
Posts: 241
Thanks: 283
Thanked 247 Times in 122 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by BlueWhelan View Post
Hey @norcalpb and @7 skulls, can you provide an update on the pedders hats? How are they holding up? Any additional noise, problems to report?
Can do. It's been roughly 5000km (3000 miles) since the install and everything is just a tight as day one. No weird noises or problems so far. Front tire wear seems fine but I will check this more closely when I change to my winter wheels in a few weeks.
Performance wise, the turn in is still immediate. I haven't been to an autoX since the install due to work commitments but with MPSS (stock size), there is now more front grip than you can safely exploit on the street. As a plus, it's easier to get the back end around. Anyone who has driven my car before/after always comments on the quicker steering. At higher speeds, it is almost too quick now, two hands on wheel,
7 skulls is offline   Reply With Quote
Old 10-06-2019, 10:12 PM   #31
norcalpb
Senior Member
 
norcalpb's Avatar
 
Join Date: Oct 2013
Drives: 2013 BRZ, 2023 Model 3
Location: SF Bay Area
Posts: 2,289
Thanks: 1,208
Thanked 853 Times in 565 Posts
Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by BlueWhelan View Post
Hey @norcalpb and @7 skulls, can you provide an update on the pedders hats? How are they holding up? Any additional noise, problems to report?
Things have been great so far with the top hats. No additional noises, and like above the handling is great. I just love how compliant they are. IMO these are the DD/sport driving go-to. I;d say I've put 7k miles on these so far.

I have really soft STi springs but plan to upgrade to a coilover setup where I can incorporate these top hats and maintain comfort in that area on my way to work.
norcalpb is offline   Reply With Quote
Old 10-29-2019, 04:12 PM   #32
7 skulls
Senior Member
 
Join Date: Jul 2015
Drives: 2014 scion frs
Location: Newfoundland
Posts: 241
Thanks: 283
Thanked 247 Times in 122 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Uneven wear...

Been away for 4 weeks without the car and just got back a few days ago. While changing the oil, I noticed some uneven wear on the inside of my front tires. Looks like almost 2 deg of camber might be too much for daily driving. My toe is within spec so that shouldn't be the problem. Everything I have read here says that 2 deg negative camber should be fine for a daily driver. I guess not. Next spring, (the car is not winter driven) I will have the alignment checked again and possibly got back to just the top hats with the stock camber bolts. Anyone else having this trouble?
Attached Images
 
7 skulls is offline   Reply With Quote
Old 10-29-2019, 06:10 PM   #33
strat61caster
-
 
strat61caster's Avatar
 
Join Date: Nov 2012
Drives: '13 FRS - STX
Location: SF Bay Area
Posts: 10,360
Thanks: 13,723
Thanked 9,470 Times in 4,993 Posts
Mentioned: 94 Post(s)
Tagged: 3 Thread(s)
That's about what my tires look like at the end of their life at -4°

'toe in spec' does not mean it's right, what's the actual toe value?
__________________
Quote:
Originally Posted by Guff View Post
ineedyourdiddly
strat61caster is offline   Reply With Quote
The Following 3 Users Say Thank You to strat61caster For This Useful Post:
7 skulls (10-29-2019), BlueWhelan (10-29-2019), x808drifter (10-29-2019)
Old 10-29-2019, 06:38 PM   #34
7 skulls
Senior Member
 
Join Date: Jul 2015
Drives: 2014 scion frs
Location: Newfoundland
Posts: 241
Thanks: 283
Thanked 247 Times in 122 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by strat61caster View Post
That's about what my tires look like at the end of their life at -4°

'toe in spec' does not mean it's right, what's the actual toe value?
0.08 and 0.07 degrees with total toe at 0.15. The car is more nervous at speed so I am hoping this is a toe issue but have no idea what toe I should be shooting for.
7 skulls is offline   Reply With Quote
Old 10-29-2019, 07:49 PM   #35
strat61caster
-
 
strat61caster's Avatar
 
Join Date: Nov 2012
Drives: '13 FRS - STX
Location: SF Bay Area
Posts: 10,360
Thanks: 13,723
Thanked 9,470 Times in 4,993 Posts
Mentioned: 94 Post(s)
Tagged: 3 Thread(s)
Quote:
Originally Posted by 7 skulls View Post
0.08 and 0.07 degrees with total toe at 0.15. The car is more nervous at speed so I am hoping this is a toe issue but have no idea what toe I should be shooting for.
In or Out?
__________________
Quote:
Originally Posted by Guff View Post
ineedyourdiddly
strat61caster is offline   Reply With Quote
Old 10-29-2019, 08:32 PM   #36
7 skulls
Senior Member
 
Join Date: Jul 2015
Drives: 2014 scion frs
Location: Newfoundland
Posts: 241
Thanks: 283
Thanked 247 Times in 122 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
[QUOTE=strat61caster;3270873]In or Out?[/QUOTE
Value is positive so toe-in.
7 skulls is offline   Reply With Quote
The Following User Says Thank You to 7 skulls For This Useful Post:
strat61caster (10-29-2019)
Old 10-29-2019, 10:51 PM   #37
strat61caster
-
 
strat61caster's Avatar
 
Join Date: Nov 2012
Drives: '13 FRS - STX
Location: SF Bay Area
Posts: 10,360
Thanks: 13,723
Thanked 9,470 Times in 4,993 Posts
Mentioned: 94 Post(s)
Tagged: 3 Thread(s)
Quote:
Originally Posted by 7 skulls View Post
Quote:
Originally Posted by strat61caster View Post
In or Out?
Value is positive so toe-in.
Could probably chop that in half closer to zero to improve tire wear, I've found the highway stability has more to do with the rear toe than the front, I've been happy with about +0.25° toe in the back and 0° in the front when it comes to highway stability. Right now at 0°F & +0.15°R and there's a bit of tramlining but part of that is the high camber I have in the front at -4°

All toe numbers are total, imho as a conservative change 'closer to zero toe front, more toe in, about 0.25°' would be a good step forward.
__________________
Quote:
Originally Posted by Guff View Post
ineedyourdiddly
strat61caster is offline   Reply With Quote
The Following User Says Thank You to strat61caster For This Useful Post:
7 skulls (10-30-2019)
Old 10-29-2019, 10:56 PM   #38
BlueWhelan
Senior Member
 
BlueWhelan's Avatar
 
Join Date: Apr 2017
Drives: 2013 Blue Subaru BRZ. 6 Spd manual
Location: Thousand Oaks, CA
Posts: 201
Thanks: 137
Thanked 155 Times in 94 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by strat61caster View Post
Could probably chop that in half closer to zero to improve tire wear, I've found the highway stability has more to do with the rear toe than the front, I've been happy with about +0.25° toe in the back and 0° in the front when it comes to highway stability. Right now at 0°F & +0.15°R and there's a bit of tramlining but part of that is the high camber I have in the front at -4°

All toe numbers are total, imho as a conservative change 'closer to zero toe front, more toe in, about 0.25°' would be a good step forward.
I agree with the above. Zero toe front, slight toe-in rear. Toe will kill tires much faster than camber will.

On a lighter note, I got my top hats in on Friday! Now I just need to find some time to install and align...
BlueWhelan is offline   Reply With Quote
The Following 2 Users Say Thank You to BlueWhelan For This Useful Post:
7 skulls (10-30-2019), norcalpb (10-30-2019)
Old 10-30-2019, 10:55 AM   #39
7 skulls
Senior Member
 
Join Date: Jul 2015
Drives: 2014 scion frs
Location: Newfoundland
Posts: 241
Thanks: 283
Thanked 247 Times in 122 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Appointment booked for tomorrow at the garage. Zero toe front is the goal. Just rotated my tires as well.
7 skulls is offline   Reply With Quote
Old 10-31-2019, 05:53 PM   #40
7 skulls
Senior Member
 
Join Date: Jul 2015
Drives: 2014 scion frs
Location: Newfoundland
Posts: 241
Thanks: 283
Thanked 247 Times in 122 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Alignment done today.

Same garage, same machine, different, more experienced tech. More camber than the last alignment scan. Had him zero front toe and it made an immediate difference to how the car drove: less twitchy at highway speeds, no more of what felt like bumpsteer across road undulations in turns. Turn in is a little slower but front grip remains the same. Not bad for $84.
On the way to the garage, I shared the road with a heavily modded MK3 Supra. 600 whp is no comparison to 200 at the crank.
Attached Images
 
7 skulls is offline   Reply With Quote
The Following 3 Users Say Thank You to 7 skulls For This Useful Post:
BlueWhelan (10-31-2019), norcalpb (10-31-2019), Racecomp Engineering (10-31-2019)
Old 10-31-2019, 09:04 PM   #41
norcalpb
Senior Member
 
norcalpb's Avatar
 
Join Date: Oct 2013
Drives: 2013 BRZ, 2023 Model 3
Location: SF Bay Area
Posts: 2,289
Thanks: 1,208
Thanked 853 Times in 565 Posts
Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
I’ve heard that having more caster on the right is better for a DD as it helps fight the crown of the road.

Maybe RCE can chime in ��
norcalpb is offline   Reply With Quote
Old 11-01-2019, 04:15 AM   #42
churchx
Senior Member
 
churchx's Avatar
 
Join Date: Mar 2015
Drives: 2014 GT86
Location: Latvia, Riga
Posts: 4,333
Thanks: 696
Thanked 2,085 Times in 1,436 Posts
Mentioned: 53 Post(s)
Tagged: 1 Thread(s)
More caster does two good things, makes steering more tending to self-return to center, and increases dynamic negative camber gain on top of static camber for turned wheels, allowing to use less static camber, resulting in more even contact patch both in straights & in turns.
In some uses those changes might be considered as negative though. For example - it will make steering heavier, which some might not like, will overwork powersteering more (some of earlier twins on sticky tires / lot of caster had issues on track with PS overheating and switching off to cool down), and too much of a caster's induced dynamic camber gain might be detrimental if one needs opposite for that, eg. in drifting, where outer tire is one countersteered "opposite way".
churchx is offline   Reply With Quote
 
Reply

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
Pedders Top Hat w/ Camber & Caster Offset - Anyone with experience? Jamestl Suspension | Chassis | Brakes -- Sponsored by 949 Racing 18 11-16-2018 04:35 PM
OEM Camber Bolts (Crash Bolts - SU003-02818) dieseldan444 Brakes, Suspension, Chassis 2 07-12-2018 09:06 PM
SPC 16mm and 14mm camber bolts - dirty grimey kid's camber dream :) Joesurf79 Brakes, Suspension, Chassis 2 01-13-2017 05:03 PM
*FREE alignment* When you get Front Camber Bolts and Rear Camber Arms Installed! Corner3garage Mechanical Maintenance and Tools 6 10-31-2013 03:40 PM


All times are GMT -4. The time now is 08:20 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
User Alert System provided by Advanced User Tagging v3.3.0 (Lite) - vBulletin Mods & Addons Copyright © 2024 DragonByte Technologies Ltd.

Garage vBulletin Plugins by Drive Thru Online, Inc.