Spring Rates - Track / Autocross - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Dave-ROR · 11-28-2012, 11:30 AM

So I haven't seen a dedicated thread yet so I wanted to start one.

Basically I'll be switching over to coilovers in the next month or so and wanted to see what you guys are running for rates for track/autocross use. I think I saw that RCE was running 400/400 but I was wondering what others were running. Also include sway bar setup (stock, aftermarket, just one aftermarket, stock removed from one end, etc).

This is for a DD/HPDE car but I've run very high spring rates on the street so I'm not opposed to that, that just requires good dampers. :shrug:

Thanks!

Racecomp Engineering · 11-28-2012, 11:55 AM

^ For reference, we're using 400/400 with the Whiteline 20mm front and 16mm rear bars.

Tires are michelin pilot super sports 245 width.

It's very nice...still easy to get it to rotate but very controllable. Ride quality is good on our RCE T2 prototypes (modified KW V3).

Myles has done some testing with firmer rates but I don't have the feedback on that.

- drew

UncleFester · 11-28-2012, 12:02 PM

I'm using out of the box KW's with the front/rear springs swapped.

I will most likely add a front bar and possibly adjust rates. I've been waiting for other mods to be installed before I corner balance the car again and give it a full eval, not to mention it's winter.

On a side note, I ought to visit RCE one of these days.

Dave-ROR · 11-28-2012, 02:18 PM

Quote:

Originally Posted by UncleFester

I'm using out of the box KW's with the front/rear springs swapped.

I will most likely add a front bar and possibly adjust rates. I've been waiting for other mods to be installed before I corner balance the car again and give it a full eval, not to mention it's winter.

On a side note, I ought to visit RCE one of these days.

What are the stock KWV3 rates?

UncleFester · 11-29-2012, 01:42 PM

From what I recall (don't have the manual near me) they are 6.1k F / 7.1k R.

#87 · 11-29-2012, 01:57 PM

Any input on staggered? ~ 235/255

Dave-ROR · 11-29-2012, 02:07 PM

Quote:

Originally Posted by UncleFester

From what I recall (don't have the manual near me) they are 6.1k F / 7.1k R.

Yeah I just spent some time searching and found an old post saying 6/7. Round up say 340/400.

It seems like unlike the stock setup people are choosing to run higher front rates, or equal.

Looking forward to everyone elses response, kind of thinking about trying an even setup first, maybe 350/350 or 400/400. No idea on sway bars, I'll worry about that later.

GTB/ZR-1 · 11-29-2012, 02:22 PM

I'm going to go 450/400 to begin with. Solo STX setup on 245/9" R-S3s.

yomny · 11-29-2012, 04:17 PM

I'm running 8/8 and I would that say that I would have gone with a 7/6 or tad lower for the streets, but then again that wouldn't have been the best for the track. I'm happy with that I got and the car handles very well. Some people don't even know it has aftermarket coil overs.

Dave-ROR · 11-29-2012, 04:20 PM

Quote:

Originally Posted by yomny

I'm running 8/8 and I would that say that I would have gone with a 7/6 or tad lower for the streets, but then again that wouldn't have been the best for the track. I'm happy with that I got and the car handles very well. Some people don't even know it has aftermarket coil overs.

Which dampers? Sway bars?

yomny · 11-29-2012, 05:41 PM

Quote:

Originally Posted by Dave-ROR

Which dampers? Sway bars?

Thats right you did as for that info, im running Fortune auto 500 8/8 with swift springs and rear helpers, all other suspension components remain stock.

BlaineWasHere · 11-29-2012, 07:49 PM

I'm also running the flipped KW set-up which is about 340R/400F on stock sways. With 245 R-S3s I've found it pretty hard to overwhelm the rear tires with power.

robispec · 11-30-2012, 01:08 AM

we run 7k front 8k rear with no rear swaybar stock front sway and with the COG 3" lower than stock car works very well (a bit firm for my DD tastes). We have FLAT cornering (about 3 degrees at full yaw) with the ability to throttle steer the car in 2nd and 3rd gear if you keep to the tq peak when you add power.

as you can see LOW lol
http://www.ft86club.com/forums/showt...light=robispec

Robi

CSG Mike · 11-30-2012, 01:40 AM

I think we'll be starting with 10k/12k (560/670 for you lb/in people)

Robi, we may need to consult with you at some point in the future for some geometry corrections

11-28-2012, 11:30 AM	#1
Dave-ROR Site Moderator Join Date: Dec 2010 Drives: Stuff Location: Florida Posts: 10,317 Thanks: 955 Thanked 5,965 Times in 2,689 Posts Mentioned: 262 Post(s) Tagged: 8 Thread(s)	Spring Rates - Track / Autocross So I haven't seen a dedicated thread yet so I wanted to start one. Basically I'll be switching over to coilovers in the next month or so and wanted to see what you guys are running for rates for track/autocross use. I think I saw that RCE was running 400/400 but I was wondering what others were running. Also include sway bar setup (stock, aftermarket, just one aftermarket, stock removed from one end, etc). This is for a DD/HPDE car but I've run very high spring rates on the street so I'm not opposed to that, that just requires good dampers. :shrug: Thanks! __________________ -Dave Track cars: 2013 Scion FRS, 1998 Acura Integra Type-R, 1993 Honda Civic Hatchback DD: 2005 Acura TSX Tow: 2022 F-450 Toys: 2001 Chevrolet Corvette Z06, 1993 Toyota MR2 Turbo, 1994 Toyota MR2 Turbo, 1991 Mitsubishi Galant VR-4 Parts: 2015 Subaru BRZ Limited, 2005 Acura TSX Projects: 2013 Subaru BRZ Limited track car build FS: 2004 GMC Sierra 2500 LT CCSB 8.1/Allison with 99k miles

11-29-2012, 04:17 PM	#9
yomny Senior Member Join Date: Jul 2012 Drives: 2013 FRS Whiteout Location: MIA Posts: 1,545 Thanks: 557 Thanked 469 Times in 340 Posts Mentioned: 33 Post(s) Tagged: 5 Thread(s)	I'm running 8/8 and I would that say that I would have gone with a 7/6 or tad lower for the streets, but then again that wouldn't have been the best for the track. I'm happy with that I got and the car handles very well. Some people don't even know it has aftermarket coil overs. __________________ GTX2867R, moto-tuned , tomei op , motiv fp , Invidia Q300 ti , Rota titan 17x9 +42 , nt555 255/40 , ST coilovers w/cascam , Hotchkis sways

11-29-2012, 07:49 PM	#12
BlaineWasHere Grip>Drift Join Date: Jun 2012 Drives: FRS Location: NorCal Posts: 3,472 Thanks: 782 Thanked 1,749 Times in 918 Posts Mentioned: 53 Post(s) Tagged: 2 Thread(s)	I'm also running the flipped KW set-up which is about 340R/400F on stock sways. With 245 R-S3s I've found it pretty hard to overwhelm the rear tires with power. __________________ My FR-S Build Thread!

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11-28-2012, 11:55 AM	#2
Racecomp Engineering Join Date: Nov 2011 Drives: 2016 BRZ, 2012 Paris Di2 & 2018 STI Location: Severn, MD Posts: 5,408 Thanks: 3,420 Thanked 7,242 Times in 2,963 Posts Mentioned: 303 Post(s) Tagged: 9 Thread(s)	^ For reference, we're using 400/400 with the Whiteline 20mm front and 16mm rear bars. Tires are michelin pilot super sports 245 width. It's very nice...still easy to get it to rotate but very controllable. Ride quality is good on our RCE T2 prototypes (modified KW V3). Myles has done some testing with firmer rates but I don't have the feedback on that. - drew

11-28-2012, 12:02 PM	#3
UncleFester Senior Member Join Date: Jun 2012 Drives: BRZ Location: Northern Virginia Posts: 597 Thanks: 157 Thanked 178 Times in 120 Posts Mentioned: 15 Post(s) Tagged: 0 Thread(s)	I'm using out of the box KW's with the front/rear springs swapped. I will most likely add a front bar and possibly adjust rates. I've been waiting for other mods to be installed before I corner balance the car again and give it a full eval, not to mention it's winter. On a side note, I ought to visit RCE one of these days.

11-29-2012, 01:42 PM	#5
UncleFester Senior Member Join Date: Jun 2012 Drives: BRZ Location: Northern Virginia Posts: 597 Thanks: 157 Thanked 178 Times in 120 Posts Mentioned: 15 Post(s) Tagged: 0 Thread(s)	From what I recall (don't have the manual near me) they are 6.1k F / 7.1k R.

11-29-2012, 01:57 PM	#6
#87 I usually post drunk Join Date: Oct 2009 Drives: BRZ Location: NY Posts: 1,487 Thanks: 15 Thanked 490 Times in 231 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Any input on staggered? ~ 235/255

11-29-2012, 02:22 PM	#8
GTB/ZR-1 Senior Member Join Date: Oct 2012 Drives: '13 BRZ in WRB--let's mod!!! Location: Central, FL Posts: 1,224 Thanks: 317 Thanked 449 Times in 262 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I'm going to go 450/400 to begin with. Solo STX setup on 245/9" R-S3s.

11-30-2012, 01:08 AM	#13
robispec Senior Member Join Date: Oct 2012 Drives: Black frs project Location: Socal Posts: 960 Thanks: 189 Thanked 886 Times in 381 Posts Mentioned: 190 Post(s) Tagged: 1 Thread(s)	we run 7k front 8k rear with no rear swaybar stock front sway and with the COG 3" lower than stock car works very well (a bit firm for my DD tastes). We have FLAT cornering (about 3 degrees at full yaw) with the ability to throttle steer the car in 2nd and 3rd gear if you keep to the tq peak when you add power. as you can see LOW lol http://www.ft86club.com/forums/showt...light=robispec Robi

11-30-2012, 01:40 AM	#14
CSG Mike Join Date: Jul 2012 Drives: S2000 CR Location: Orange County Posts: 14,531 Thanks: 8,920 Thanked 14,177 Times in 6,835 Posts Mentioned: 966 Post(s) Tagged: 14 Thread(s)	I think we'll be starting with 10k/12k (560/670 for you lb/in people) Robi, we may need to consult with you at some point in the future for some geometry corrections

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