|
Tracking / Autocross / HPDE / Drifting What these cars were built for! |
|
Thread Tools | Search this Thread |
05-06-2017, 11:21 PM | #1 |
Senior Member
Join Date: Apr 2014
Drives: 2014 BRZ
Location: Redmond, WA
Posts: 639
Thanks: 299
Thanked 392 Times in 229 Posts
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
|
Steering rack options?
Is there a steering rack that fixes the inconsistent boost issues at the track?
__________________
|
05-09-2017, 03:01 PM | #2 |
Senior Member
Join Date: Jun 2012
Drives: Hydra EMS Powered FRS Raven Black
Location: Maryland
Posts: 839
Thanks: 54
Thanked 1,021 Times in 365 Posts
Mentioned: 61 Post(s)
Tagged: 2 Thread(s)
|
How bad is it? I found too much caster make it horrible and the power steering turns on and off. I still get it every now and then without additional caster but it's not all the time.
|
05-09-2017, 03:31 PM | #3 |
Senior Member
Join Date: Apr 2017
Drives: 2014 Subaru BRZ Limited 6MT SSM
Location: Atlanta, GA, USA
Posts: 293
Thanks: 195
Thanked 68 Times in 54 Posts
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
|
I've has the power steering cut out for a split second during regular driving conditions and even in parking lots. Has happened twice in like the past month. Feels really unnerving. I believe I'm on stock alignment settings. Interested to hear if there is a solution to this.
|
05-09-2017, 03:37 PM | #4 | |
Senior Member
Join Date: Apr 2014
Drives: 2014 BRZ
Location: Redmond, WA
Posts: 639
Thanks: 299
Thanked 392 Times in 229 Posts
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
|
Quote:
I can live with it, but sure wish I didn't have to. What is your caster at?
__________________
Last edited by Sleepless; 05-09-2017 at 05:20 PM. |
|
05-09-2017, 03:40 PM | #5 |
Senior Member
Join Date: Jun 2012
Drives: Hydra EMS Powered FRS Raven Black
Location: Maryland
Posts: 839
Thanks: 54
Thanked 1,021 Times in 365 Posts
Mentioned: 61 Post(s)
Tagged: 2 Thread(s)
|
Oh I had a huge problem with shutting off under trail braking (at least 3 turns a lap). It does make it hard to drive a consistent line when you go from barely holding the whee to straight up man handling it! I just run OEM caster now. It has been dramatically reduced but on occasion I still get it.
|
05-09-2017, 05:20 PM | #6 |
Senior Member
Join Date: Apr 2014
Drives: 2014 BRZ
Location: Redmond, WA
Posts: 639
Thanks: 299
Thanked 392 Times in 229 Posts
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
|
Yes, trail braking and highly cambered turns!
I thought I'd read that the new cars don't have the problem so I was hoping some might have tried changing to the newer rack, if indeed they are different.
__________________
|
05-09-2017, 05:59 PM | #7 | |
-
Join Date: Nov 2012
Drives: '13 FRS - STX
Location: SF Bay Area
Posts: 10,364
Thanks: 13,731
Thanked 9,475 Times in 4,996 Posts
Mentioned: 94 Post(s)
Tagged: 3 Thread(s)
|
Quote:
If you get under the car the rack is just a straight rack and pinion, the power assist lives behind the dashboard connecting to the steering wheel shaft before it enters the steering rack. If there's an improved unit it'll be that. Steering shaft and power steering unit: Steering rack: Changing the rack itself won't help the problem, maybe if you change the ratio that could lighten the load on the EPS, but you'll have lighter steering feel and require more steering input to get the wheel turned the same amount. And no guarantee the power steering system will coordinate happily with the new ratio, it could go haywire. Good info out of Element Tuning that increased caster worsens the effect which feeds into the overloading/overheating theory. Maybe that was known before but I don't recall. |
|
The Following User Says Thank You to strat61caster For This Useful Post: | Sleepless (05-09-2017) |
05-09-2017, 06:03 PM | #8 |
TRACKBREAD
Join Date: Mar 2016
Drives: 2013 BRZ
Location: Florida
Posts: 3,929
Thanks: 2,660
Thanked 4,024 Times in 1,895 Posts
Mentioned: 30 Post(s)
Tagged: 0 Thread(s)
|
Holy crap no way! It's actually a manual rack? Does this mean we can do an easy PS delete?
Sent from my iPhone using Tapatalk |
05-09-2017, 06:27 PM | #9 |
-
Join Date: Nov 2012
Drives: '13 FRS - STX
Location: SF Bay Area
Posts: 10,364
Thanks: 13,731
Thanked 9,475 Times in 4,996 Posts
Mentioned: 94 Post(s)
Tagged: 3 Thread(s)
|
Hypothetically, yes. I don't know what it does to the traction control system as a whole though, you might lose ABS, there have been a couple threads on it but I don't recall anything conclusive.
|
05-09-2017, 06:45 PM | #10 |
Senior Member
Join Date: May 2016
Drives: 2023 BRZ
Location: Houston, TX
Posts: 208
Thanks: 174
Thanked 219 Times in 90 Posts
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
|
How about reducing electric assist, so that the motor doesn't overheat? Sounds so doable...
|
05-09-2017, 07:44 PM | #11 |
Member
Join Date: Dec 2016
Drives: '17 BRZ PP
Location: Portland, OR
Posts: 56
Thanks: 52
Thanked 40 Times in 25 Posts
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
|
Thought I'd post this. The power steering definitely has overheating protection. This is from the my 2017 BRZ manual:
|
The Following User Says Thank You to tony-brz For This Useful Post: | strat61caster (05-09-2017) |
05-10-2017, 09:21 AM | #12 |
Senior Member/Old Fanboi
Join Date: Nov 2011
Drives: 2000 2ZZ-GE MR2 Spyder HT
Location: Back home in Ohio now
Posts: 2,446
Thanks: 1,931
Thanked 2,014 Times in 915 Posts
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
|
Sounds like adding heatsinks and/or a small fan might help.
__________________
So many modders have more cents than sense!
|
05-10-2017, 11:43 AM | #13 |
Senior Member
Join Date: Apr 2014
Drives: 2014 BRZ
Location: Redmond, WA
Posts: 639
Thanks: 299
Thanked 392 Times in 229 Posts
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
|
For me, it's not heat-related. I can make it happen in the first corner on a cold day and it is consistent throughout a 30 minute session. It's purely load related. My guess is that it reduces the assist to prevent overheating once it detects a heavy load.
I'd rather set it to reduced-assist full time when on the track so it is consistent. I wonder if it is a closed system or if it is controlled by the ECU. If the latter, maybe Beastronix could add a reduced-assist mode to the 86nanny? [EDIT: I've contacted Beastronix if they can do this. Told them I'd pay $200 for such a feature; easily. Let them know if you are also interested and how much it is worth to you. Even if it isn't ECU controlled, I bet they can figure out how to put a manual switch directly to the assist controller! Fingers crossed...]
__________________
Last edited by Sleepless; 05-10-2017 at 12:30 PM. |
The Following User Says Thank You to Sleepless For This Useful Post: | Jonsey (05-10-2017) |
05-10-2017, 12:27 PM | #14 | |
TRACKBREAD
Join Date: Mar 2016
Drives: 2013 BRZ
Location: Florida
Posts: 3,929
Thanks: 2,660
Thanked 4,024 Times in 1,895 Posts
Mentioned: 30 Post(s)
Tagged: 0 Thread(s)
|
Quote:
What happens if you pull the PS fuse? Sent from my iPhone using Tapatalk |
|
|
|
Thread Tools | Search this Thread |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
FS: OEM Steering Rack | MicheleAbbate | Brakes, Suspension, Chassis | 0 | 04-18-2016 02:51 PM |
Cusco steering rack stay | olsonpg | Suspension | Chassis | Brakes -- Sponsored by 949 Racing | 6 | 07-27-2015 07:35 PM |
TiC steering rack bushings review | mokinbird87 | Suspension | Chassis | Brakes -- Sponsored by 949 Racing | 0 | 07-21-2014 12:43 PM |
Steering Rack Play | FR Sports | CANADA | 1 | 06-04-2014 09:00 PM |
Steering rack | diss7 | Suspension | Chassis | Brakes -- Sponsored by 949 Racing | 6 | 04-07-2014 12:12 AM |