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Brakes & Suspension Forum sponsored by The Tire Rack |
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12-16-2018, 10:26 AM | #1 |
Scooby Newbie
Member#: 485907
Join Date: May 2018
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03 wrx with bc racing br coilovers. Jarring and bouncy.
So I got this car early this year and had to rebuild the motor, replace all the steering parts, installed 06 brakes , installed sti seats front and rear. So now months later I get it on the road and kinda fun to drive. But the ride quality is crap. It came with bc racing coilovers and it's like there is no middle it's with great on super smooth roads or **** on roads with little age. I have been looking but bilstein does not make anything for this car other than for $2800 bucks and for a daily driver not going to spend that much. What spring rates seem good for this car? Would buying swift springs make these any better? I have also been looking at slivers, tein flex z, st x coilovers I dont like that there is zero setting adjustment for the price.
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12-16-2018, 11:18 AM | #2 |
Scooby Specialist
Member#: 301554
Join Date: Nov 2011
Chapter/Region:
BAIC
Location: California
Vehicle:2002 WRX Wagon PSM 2002 WRX Sedan JBP |
KW V1 for me. I have them on 2 cars
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12-16-2018, 03:23 PM | #3 |
Scooby Newbie
Member#: 301042
Join Date: Nov 2011
Location: UK
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Tokico d-specs https://www.oakos.com/TOK-DSP-10.htm
WA/A2 springs with matching bump stops and dust boots https://forums.nasioc.com/forums/sho....php?t=2859377 |
12-17-2018, 01:00 AM | #4 |
Scooby Newbie
Member#: 485907
Join Date: May 2018
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So no go on swift springs? I was wondering what would be a good spring rate to buy. If I go back to a stock setup I have to spend 200 on new strut mounts since the car came with coilovers and I don't have any factory parts for it.
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12-17-2018, 06:14 AM | #5 |
Scooby Newbie
Member#: 301042
Join Date: Nov 2011
Location: UK
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The softer the spring rate, the more travel/ride height you need.
BC do a 4/3kg/mm (224/168lb/in) set, with longer travel struts, to allow for the lower spring rates. When I was developing the WA/A2 springs, I prefered the front and rear spring rates closer together, linear 4.4/4kg/mm (245/223lb/in) - I wouldn't go any stiffer than that, on undulating/uneven roads. Reducing the spring rates, on your BC coilovers, will depend on what minimum spring rates, their damping curve will accommodate. Last edited by 2pot; 12-17-2018 at 06:27 AM. |
12-17-2018, 09:39 AM | #6 | |
NASIOC Vendor
Member#: 54202
Join Date: Feb 2004
Chapter/Region:
MAIC
Location: Elkridge, Maryland
Vehicle:ASK ABOUT NEW RCE SWAY BARS FOR STI |
Quote:
Myles RCE |
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12-17-2018, 04:42 PM | #7 | |
NASIOC Supporter
Member#: 30669
Join Date: Dec 2002
Chapter/Region:
Tri-State
Location: USA, North NJ, 07456
Vehicle:1998 Legacy 2.5GT Silver Sleeper BK, 5MT |
Quote:
I don't know, son had a set that sounds similar, he got rebuilds (?) and it was fine after. Blown struts can make almost any spring seem harsh. Leaks down the strut body is first clue, but, if driven on for quite a while, maybe strut oil is sorta long gone. Just thoughts. Last edited by Charlie-III; 12-17-2018 at 09:28 PM. Reason: Fix typo |
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12-17-2018, 06:11 PM | #8 |
Scooby Guru
Member#: 71875
Join Date: Oct 2004
Location: Montana
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The setup also has an effect. Like, how low are they, is there enough bump/droop travel, and where are the damper adjustment set.
Changing to swift springs won't do a whole lot. It's not going to fix the clunky, worn out bearings or seized height adjusters or blown shocks that were crappy when new. I would just replace them entirely. I really like the look of those RCE SS1s they mentioned and would like a set myself. Most of RCE's parts are based on an existing KW or Bilstein part but with changes to the springs and shock valving. Both make great parts but they like to put really soft rear springs on the car which is nice for comfort but bad for handling balance. |
12-18-2018, 12:42 AM | #9 |
Scooby Newbie
Member#: 485907
Join Date: May 2018
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The struts are set to 8 clicks from the softest setting. I have a 2 inch wheel gap, coilovers are marked 2017 model. I got the car early this year. These were on the car when I got it. There is no leaks that I can find. I like the idea of the ss1 setup. Seems as close as I'm going to get to bilstein setup for a normal price range.
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12-18-2018, 10:13 AM | #10 |
Scooby Newbie
Member#: 301042
Join Date: Nov 2011
Location: UK
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GD SS1 7/6kg/mm (400/340lb/in)
BC BR 8/6kg/mm (450/340lb/in) Last edited by 2pot; 12-18-2018 at 10:27 AM. |
12-18-2018, 11:32 AM | #11 | |
Scooby Specialist
Member#: 175624
Join Date: Mar 2008
Chapter/Region:
MWSOC
Location: Wichita, KS
Vehicle:0304 WRX WRX SY WRB |
Quote:
Too "stiff" on the damping and they're not making the most of travel and they're rebounding too slowly which could be described as jarring or bumpy because they're not allowing the springs to absorb the impact and transmitting more of it to the chassis. Too "soft" and they're allowing the spring to compress too quickly and rebound too quickly causing oscillations/bounciness. Keep in mind, even in the right range, they're not going to ride like a Cadillac, it's a stiffer suspension that's going to translate more road imperfections into the chassis. It's true that RCE, KW, Bilstein, etc. are on a different level than BC, Stance, and other lower priced coilovers, that's not to say they're complete garbage. You should be able to dial them in to be reasonably comfortable. Once you've exhausted your knob turning options I highly suggest the RCE option. The RCE's will make the street manners feel much better. That was my experience going from Stance Supersports with 8k(450lb/in)/6k(~350lb/in) to RCE T2's even with stiffer 500/400 lb/in springs. |
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12-18-2018, 04:17 PM | #12 |
Scooby Newbie
Member#: 301042
Join Date: Nov 2011
Location: UK
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The OP is concerned with poor ride, on poor roads. Why even consider high-rate springs on a road car? Unless your going for a particular slammed look. "Any suspension will work, if you don't let it" (C.Chapman).
Softer springs = more grip - stiffest end of the car will slide first. Dial them in to be comfortable? He's, unfortunately, got the wrong spring rates. As rightly stated - damping controls spring oscillations. It is not a means to rectify the wrong spring rate/bar choice, on a particular surface. He needs to consider more suitable ride frequencies, for a road car. Rather than turn his car into a mobile chicane, on undulating/uneven roads - the commonest road surface. Last edited by 2pot; 12-18-2018 at 04:29 PM. |
12-18-2018, 04:18 PM | #13 |
Scooby Newbie
Member#: 485907
Join Date: May 2018
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Pm sent myles from race comp.
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01-13-2021, 02:43 PM | #14 |
Scooby Newbie
Member#: 521646
Join Date: Jan 2021
Chapter/Region:
South East
Location: North Carolina
Vehicle:2003 Impreza WRX 207 02C, 42C World Rally Blue |
i recently got my subaru and it has the BC Racing Coilovers.. the ride is HORRIBILY bouncy.. anyone know what I can set the dampening to that will help eliminate this?
Thank you! ~~~ 2003 Subaru Impreza WRX ~~~ |
01-13-2021, 03:39 PM | #15 |
Scooby Specialist
Member#: 395793
Join Date: Jul 2014
Chapter/Region:
Tri-State
Location: SLC and Lake Placid
Vehicle:2005 92x Aero Beige |
Cheap coilovers like those are going to be bouncy. You can have them rebuilt with softer springs rates, get a higher quality set of coilovers, or get a more OE style damper with a quality spring like RCE yellows or blacks.
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01-14-2021, 08:30 AM | #16 |
Scooby Newbie
Member#: 521646
Join Date: Jan 2021
Chapter/Region:
South East
Location: North Carolina
Vehicle:2003 Impreza WRX 207 02C, 42C World Rally Blue |
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01-14-2021, 09:17 AM | #17 | |
Scooby Specialist
Member#: 193940
Join Date: Nov 2008
Location: Philly
Vehicle:2004 WRX STI Black RalliSpec Shortblock |
Quote:
Last edited by BlackFighter; 01-14-2021 at 09:22 AM. |
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01-14-2021, 11:08 AM | #18 |
Scooby Specialist
Member#: 498642
Join Date: Mar 2019
Chapter/Region:
Tri-State
Location: our wrx IS the family sedan
Vehicle:'19 WRX Ltd 6M dgm '08 Mustang GT (the toy) |
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01-14-2021, 11:35 AM | #19 | |
Scooby Specialist
Member#: 193940
Join Date: Nov 2008
Location: Philly
Vehicle:2004 WRX STI Black RalliSpec Shortblock |
Quote:
https://www.penskeshocks.com/product...-2013-present/ |
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02-12-2021, 11:26 AM | #20 |
Scooby Newbie
Member#: 521646
Join Date: Jan 2021
Chapter/Region:
South East
Location: North Carolina
Vehicle:2003 Impreza WRX 207 02C, 42C World Rally Blue |
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02-12-2021, 11:32 AM | #21 |
Scooby Specialist
Member#: 193940
Join Date: Nov 2008
Location: Philly
Vehicle:2004 WRX STI Black RalliSpec Shortblock |
Talk to these guys, they will answer all your questions and will rebuild your set to whever your needs are.
https://fealsuspensionstore.com/ |
02-12-2021, 08:42 PM | #22 | |
Scooby Specialist
Member#: 395793
Join Date: Jul 2014
Chapter/Region:
Tri-State
Location: SLC and Lake Placid
Vehicle:2005 92x Aero Beige |
Quote:
Beat me to it. Do this ^^ |
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02-16-2021, 07:40 PM | #23 | |
Scooby Newbie
Member#: 462296
Join Date: Feb 2017
Chapter/Region:
SCIC
Location: Riverside, CA
Vehicle:2003 Lexus IS300 2JZ 620HP/595TQ |
Quote:
If the ride is bouncy there is a lack of rebound force control. What needs to happen is that the rates soften up (band aid) or the valving is altered (correct fix). Entry level BC's just aren't spectacular and there's not much you can do to improve the situation without shock work. |
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