|
Suspension | Chassis | Brakes -- Sponsored by 949 Racing Relating to suspension, chassis, and brakes. Sponsored by 949 Racing. |
|
Thread Tools | Search this Thread |
03-06-2018, 01:12 PM | #1 |
Gauging interest - RCE Rally-x springs
I've been talking about this for a little while now, but I wanted to "officially" gauge interest on a "fun" rally spring (i.e not a WRC caliber set-up). Not a competitive stage rally or rock jumper spring, but a slight lift and a change in spring rates to better suit gravel, snow, and other lower grip situations.
These would work with OEM dampers, but would be especially nice with Bilstein B6. Designed for OEM or smaller swaybars. Considering a 15mm increase in height with a rear bias in spring rate. Contrary to what we do with our RCE Yellow springs, these springs would have firmer rear springs than fronts. In general, with less grip (as you'd have on gravel/snow) you want the car to be more oversteer biased and you'd want to do that via springs. I do have some great rally contacts from my almost 14 years of working on Subaru suspensions with RCE and would work with them to get spring rates and other details right. But we are also be looking for feedback from the community. Let us know if you'd be interested in a suspension like this! - Andrew (I know there's at least 1 other option out there similar to this, but I have not tried them. We'd like to do things our way regardless.) |
|
The Following 3 Users Say Thank You to Racecomp Engineering For This Useful Post: |
03-06-2018, 01:14 PM | #2 |
ALSO.
I spent this past weekend in the mountains of West Virginia blasting around tarmac, gravel, dirt, and up to 8 inches of fresh snow. Just stock suspension with 16x7 Enkei RPF1s and Bridgestone Blizzaks. OEM-ish alignment. Temperatures from the mid 20's F to 50 F. We'll call it a basic data collection exercise. 1. It was extremely fun. 2. A little more ride height and travel would help. Mostly to better soak up some of the bigger bumps, but also my bumper plowed more snow than I would like in the deeper parts. There were also some taller roots/rocks that made me nervous with the lack of ground clearance. Also, travel is good if you uh...get a little airborne so increasing height with just spacers is not ideal. 3. The OEM shocks are not terrible for this kind of thing, but definitely not ideal. 4. The car isn't terribly unbalanced on snow/gravel since you don't need much camber on low grip surfaces, but could be improved. 5. I installed the OEM Toyota mudguards before the trip and they help reduce rocks flying up the side of the car, but rallyarmor flaps would have been much better. The OEM mudguards collect snow too easily and don't cover as much. 6. Some underbody protection would have put my mind at ease, but no incidents to report. 7. The Blizzaks, in addition to being excellent on snow, were pretty darn good on gravel. They exceeded expectation on the winding hilly tarmac but definitely got a little too hot. 8. Seriously, so much fun. Prior to this weekend, the idea of a fall/winter only suspension set-up for my car was intriguing but never something I thought I'd seriously do. I'm 100% on board for it now. - Andrew everyone should post pictures of rally BRZ/GT86 cars now |
|
The Following 3 Users Say Thank You to Racecomp Engineering For This Useful Post: |
03-06-2018, 01:14 PM | #3 |
03-06-2018, 02:18 PM | #4 |
Get a Bowl
Join Date: Oct 2009
Drives: 2017 BRZ PP
Location: Honolulu HI
Posts: 939
Thanks: 108
Thanked 383 Times in 221 Posts
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
|
Subscribed
I interested for sure, would love to rallycross without worrying about ripping my lip off. If this happenes would ya'll test them with the Sachs as well? A friend of mine has a pretty nice lifted brz |
The Following User Says Thank You to Ricepuddin For This Useful Post: | Racecomp Engineering (03-06-2018) |
03-06-2018, 03:24 PM | #5 |
Senior Member
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)
|
"rear bias in spring rate" & "you want the car to be more oversteer biased"
I'm not the one to talk, as due being cheap i went to ice track with still summer track alignment of -3 front/-2.5 rear camber that is far from stock understeer-ish biased & which is of too much camber for driving on ice, but i'm not 100% convinced on these two bits. As in - 1) unlike on tarmac, it's VERY easy to power-oversteer on loose grip surfaces like gravel/snow/ice (i balanced 1/3-1/4th of throttle un icetrack, and that's on studded tires), 2) understeer bias may slightly compensate lack of stock steering angle, to allow opening throttle more, no? |
03-06-2018, 03:44 PM | #6 | |
Quote:
But to clarify, we wouldn't be going too heavy on the rear bias. We just would not use even rates as we do in other situations. - Andrew |
||
The Following User Says Thank You to Racecomp Engineering For This Useful Post: | TeutonicShift89 (05-08-2018) |
03-06-2018, 03:54 PM | #7 | |
Quote:
- Andrew |
||
The Following User Says Thank You to Racecomp Engineering For This Useful Post: | TeutonicShift89 (05-08-2018) |
03-06-2018, 04:12 PM | #8 |
Senior Member
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)
|
If jumps were mentioned .. that somehow makes me think more of progressive springs.. stock rubber bumpstops may have too short of travel and too high rise of rates to dampen well heavy landings, no?
|
03-06-2018, 04:36 PM | #9 |
Senior Member
Join Date: Oct 2013
Drives: 2013 BRZ, 2023 Model 3
Location: SF Bay Area
Posts: 2,296
Thanks: 1,212
Thanked 861 Times in 570 Posts
Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
|
If you want someone to demo this springs count me in .
I just got bilstein b6 but I’ve been rocking your tarmac springs for exactly 86k miles. |
03-07-2018, 02:43 AM | #10 | |
Get a Bowl
Join Date: Oct 2009
Drives: 2017 BRZ PP
Location: Honolulu HI
Posts: 939
Thanks: 108
Thanked 383 Times in 221 Posts
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
|
Quote:
A good stage rally set up will go for $4k or up, and would not be fun to drive daily. Sent from my Pixel XL using Tapatalk |
|
03-07-2018, 02:53 AM | #11 |
Get a Bowl
Join Date: Oct 2009
Drives: 2017 BRZ PP
Location: Honolulu HI
Posts: 939
Thanks: 108
Thanked 383 Times in 221 Posts
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
|
More motivation
Sent from my Pixel XL using Tapatalk |
The Following 3 Users Say Thank You to Ricepuddin For This Useful Post: |
03-07-2018, 03:40 AM | #12 | |
Senior Member
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)
|
Quote:
Imho good rally coilover set costs $7-15K, but that aside, i wonder how usually they are valved and what are common rates for rally use if it's possible to somewhat generalize. Should they really be very harsh to handle & grip well on loose grip / bad roads? I guess they are probably tuned closer to track cars suspension for tarmac stages, but how it's for gravel/snow/ice rally stages, spring rates/high & low speed rebound & compress damping wise? (aside obvious higher travel, ride height and increased strength/durability) |
|
03-07-2018, 12:50 PM | #13 | |
Get a Bowl
Join Date: Oct 2009
Drives: 2017 BRZ PP
Location: Honolulu HI
Posts: 939
Thanks: 108
Thanked 383 Times in 221 Posts
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
|
Quote:
As far as the cost , I a remember Primative making a decent setup for around $4k, but I guess I should have said entry level. Also the maintenance on rally suspension is pretty nuts Sent from my Pixel XL using Tapatalk |
|
03-07-2018, 01:53 PM | #14 |
Senior Member
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)
|
Maintenance? Yeah. I also was shocked to hear something like overhaul every 1K km.
But then again real rally coilovers DO handle seemingly impossible. [ame="https://www.youtube.com/watch?v=zZQKepbGKiI"]- Robert Kubica Test - Flat out & Max Attack Moments - Test Mc 2015 - - YouTube[/ame] [ame="https://www.youtube.com/watch?v=PMlxZKH230M"]Kubica Flat Out at Test Rallye Monte Carlo 2015 - YouTube[/ame] |
|
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Gauging interest for an OEM exhaust in GTA | StraightOuttaCanadaEh | Canada Classifieds | 5 | 06-08-2017 01:00 PM |
Gauging interest in ACE 150- Type B | olsonpg | Canada Classifieds | 3 | 07-12-2016 07:10 PM |
Gauging Interest | ISC Suspension | Announcements, Contests, Giveaways | 17 | 04-03-2014 09:44 AM |
Jdm headlights - gauging interest | Hawk77FT | Exterior Parts (Aero, Lighting, Etc.) | 7 | 03-31-2014 09:38 AM |
Gauging Interest Rear Diffuser | SunkenFRS | Cosmetic Modification (Interior/Exterior/Lighting) | 20 | 10-07-2013 04:28 AM |