New Tein Product Announcement H-Tech Springs - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

RallySport Direct · 04-17-2012, 11:09 PM

Just Announced from Tein Japan - Tein H-Tech Springs for the BRZ/FRS to be Released in May!

Spring Rate: 3.0k-Front spring rate: 4.6k-Rear spring rate
Drop Height: -25 mm Front -20mm Rear

We will release more info as it becomes available.
Thanks guys!
Rick

Ryephile · 04-17-2012, 11:19 PM

To translate into Imperial units, it's 258 lb/in front and 168 lb/in rear spring rates. This might be the closest yet to knowing the stock rates, as lowering springs can't deviate too much from stock without creating awful ride characteristics [i.e. bouncy].

Considering the front is a Mac Strut and the rear has some notable motion ratio, the wheel rate delta front to back is rather biased, with a very soft rear wheel rate. Does anyone have the rear motion ratio of the Impreza/WRX/STI?

uspspro · 04-17-2012, 11:58 PM

Still waiting for RCE to tell us their rates

blu_ · 04-18-2012, 12:00 AM

In general Subarus seem to be pretty highly sprung in the front compared to rear. This car they did the same, compared to Toyota. RCE bumps the rear rate a lot more than the fronts on their STI springs. IMO Subaru isn't very good at suspension tuning (as far as springs and dampers go).

I disagree that you can't change rates much on stock dampers. On the STI I know that the stock bounciness is actually caused by the car being undersprung for its dampers. Again, RCE raises their spring rates significantly front and back to get rid of the stock bounce. Just the backs even more so.

Ryephile · 04-18-2012, 10:48 AM

Quote:

Originally Posted by blu_

I disagree that you can't change rates much on stock dampers. On the STI I know that the stock bounciness is actually caused by the car being undersprung for its dampers. Again, RCE raises their spring rates significantly front and back to get rid of the stock bounce. Just the backs even more so.

Subaru's alleged tuning incompetence aside, most OEM's match their spring rates to the damper curves reasonably well. As such, deviating too far from OEM rates with OEM damper curves isn't a good idea. FWIW, "bouncy" or "floating" are used to describe underdamped situations, whereas "harsh" or "jolting" are descriptors for overdamped. The situation you're describing is an exception and not the norm.

In the end, it's all about matching the vehicles' parameters such that you achieve the desired wheel rate with the damping curve philosophy of your choice [be it "ideal" or not]. If Tein put the stock dampers on a dyno and found the stock spring rates to not be appropriate, they may feel it necessary to adjust the rates of their offering accordingly.

Dave-ROR · 04-18-2012, 11:12 AM

Quote:

Originally Posted by Ryephile

Subaru's alleged tuning incompetence aside, most OEM's match their spring rates to the damper curves reasonably well. As such, deviating too far from OEM rates with OEM damper curves isn't a good idea. FWIW, "bouncy" or "floating" are used to describe underdamped situations, whereas "harsh" or "jolting" are descriptors for overdamped. The situation you're describing is an exception and not the norm.

In the end, it's all about matching the vehicles' parameters such that you achieve the desired wheel rate with the damping curve philosophy of your choice [be it "ideal" or not]. If Tein put the stock dampers on a dyno and found the stock spring rates to not be appropriate, they may feel it necessary to adjust the rates of their offering accordingly.

blu_ · 04-18-2012, 11:23 AM

Quote:

Originally Posted by Ryephile

Subaru's alleged tuning incompetence aside, most OEM's match their spring rates to the damper curves reasonably well. As such, deviating too far from OEM rates with OEM damper curves isn't a good idea. FWIW, "bouncy" or "floating" are used to describe underdamped situations, whereas "harsh" or "jolting" are descriptors for overdamped. The situation you're describing is an exception and not the norm.

In the end, it's all about matching the vehicles' parameters such that you achieve the desired wheel rate with the damping curve philosophy of your choice [be it "ideal" or not]. If Tein put the stock dampers on a dyno and found the stock spring rates to not be appropriate, they may feel it necessary to adjust the rates of their offering accordingly.

Sure, I was just chiming in with my layman input from experience. I don't think we are disagreeing after reading your post. Hopefully RCE will stop by and expand.

Racecomp Engineering · 04-18-2012, 02:05 PM

nevermind, carry on.

OrbitalEllipses · 04-19-2012, 12:32 PM

I always thought it was common knowledge that S-Techs suck.

Hachiroku · 04-19-2012, 02:09 PM

Let's keep the discussion on topic please - about springs.

nibor33 · 04-19-2012, 03:18 PM

Since RCE is here, and they have aftermarket springs, can you tell us the stock spring rates yet? And if that is part of an information embargo, can you tell us when the stock spring rates an be released?

Thank you.

Dave-ROR · 04-19-2012, 03:28 PM

Damn I obviously missed some entertainment

In for stock spring rates though.

Racecomp Engineering · 04-19-2012, 03:34 PM

We'll start a different thread soon and keep this one on topic.

Turbowned · 04-19-2012, 04:01 PM

Needs moar low. I hope TRD Japan has more agressive springs like they used to offer in the 80's and 90's... Ones for the MK1 MR2 would lower it be 2.25"F and 1.75"R

04-17-2012, 11:09 PM	#1
RallySport Direct Join Date: Apr 2012 Drives: 2014 Widebody Cosworth FR-S Location: Salt Lake City, Utah Posts: 4,542 Thanks: 205 Thanked 1,198 Times in 554 Posts Mentioned: 38 Post(s) Tagged: 0 Thread(s)	New Tein Product Announcement H-Tech Springs Just Announced from Tein Japan - Tein H-Tech Springs for the BRZ/FRS to be Released in May! Spring Rate: 3.0k-Front spring rate: 4.6k-Rear spring rate Drop Height: -25 mm Front -20mm Rear We will release more info as it becomes available. Thanks guys! Rick Last edited by RallySport Direct; 06-24-2012 at 09:36 PM.

04-17-2012, 11:19 PM	#2
Ryephile Hot Dog Join Date: Apr 2011 Drives: quicker than arghx7 Location: Metro Detroit Posts: 1,316 Thanks: 103 Thanked 173 Times in 83 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	To translate into Imperial units, it's 258 lb/in front and 168 lb/in rear spring rates. This might be the closest yet to knowing the stock rates, as lowering springs can't deviate too much from stock without creating awful ride characteristics [i.e. bouncy]. Considering the front is a Mac Strut and the rear has some notable motion ratio, the wheel rate delta front to back is rather biased, with a very soft rear wheel rate. Does anyone have the rear motion ratio of the Impreza/WRX/STI? __________________ "Wisdom is a not a function of age, but a function of experience." Just Say No to unqualified aftermarket products.

04-18-2012, 02:05 PM	#8
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)	nevermind, carry on. Last edited by Racecomp Engineering; 04-19-2012 at 02:26 PM.

04-19-2012, 12:32 PM	#9
OrbitalEllipses Banned Join Date: Jan 2012 Drives: Attitude Location: MD Posts: 10,046 Thanks: 884 Thanked 4,889 Times in 2,902 Posts Mentioned: 123 Post(s) Tagged: 4 Thread(s)	I always thought it was common knowledge that S-Techs suck. Last edited by OrbitalEllipses; 04-19-2012 at 03:17 PM.

04-19-2012, 03:28 PM	#12
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)	Damn I obviously missed some entertainment In for stock spring rates though. __________________ -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

04-17-2012, 11:58 PM	#3
uspspro Senior Member Join Date: Mar 2012 Drives: DGM BRZ, MR-S 3.5L V6 swap (sold) Location: Bay Area, CA Posts: 602 Thanks: 28 Thanked 188 Times in 121 Posts Mentioned: 1 Post(s) Tagged: 1 Thread(s)	Still waiting for RCE to tell us their rates

04-18-2012, 12:00 AM	#4
blu_ Senior Member Join Date: Mar 2012 Drives: SWP BRZ LTD Location: Portland, OR Posts: 889 Thanks: 637 Thanked 170 Times in 106 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	In general Subarus seem to be pretty highly sprung in the front compared to rear. This car they did the same, compared to Toyota. RCE bumps the rear rate a lot more than the fronts on their STI springs. IMO Subaru isn't very good at suspension tuning (as far as springs and dampers go). I disagree that you can't change rates much on stock dampers. On the STI I know that the stock bounciness is actually caused by the car being undersprung for its dampers. Again, RCE raises their spring rates significantly front and back to get rid of the stock bounce. Just the backs even more so.

04-19-2012, 02:09 PM	#10
Hachiroku Administrator Join Date: Oct 2009 Drives: Boxster 986 Location: Tristate Posts: 1,160 Thanks: 36 Thanked 1,977 Times in 344 Posts Mentioned: 172 Post(s) Tagged: 5 Thread(s)	Let's keep the discussion on topic please - about springs.

04-19-2012, 03:34 PM	#13
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)	We'll start a different thread soon and keep this one on topic. Last edited by Racecomp Engineering; 04-19-2012 at 03:47 PM.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Tein Street Advance BRZ/GT-86/FR-S Coilovers Released in Japan	JSC Speed	Suspension \| Chassis \| Brakes -- Sponsored by 949 Racing	76	08-13-2014 08:50 AM
First 86 Winners - Prize Announcement	MrBRZ	Scion FR-S / Toyota 86 GT86 General Forum	52	03-04-2012 02:40 PM
Official Tokyo Motor Show announcement page?	Guff	Scion FR-S / Toyota 86 GT86 General Forum	152	11-30-2011 01:10 PM
Scion's big announcement!?! Coming on April 20.	A-Spike	Scion FR-S / Toyota 86 GT86 General Forum	152	03-30-2011 07:18 PM

User Name		Remember Me?
Password