|
Brakes & Suspension Forum sponsored by The Tire Rack |
|
|
|
Thread Tools | Display Modes |
08-31-2020, 01:48 PM | #26 | |
Scooby Newbie
Member#: 509092
Join Date: Dec 2019
|
Quote:
The measurement is from the center of the wheel to the top of the fender arch. These are the springs that the manufacturer recommended for me https://motorsportsammo.com/products...71163027&_ss=r https://motorsportsammo.com/products...89218166&_ss=r Also. A vid I did on the install. I have since lowered them a bit. https://youtu.be/PMHyYmETrV8 THANKS!!!
* Registered users of the site do not see these ads.
Last edited by SaabaRuta92x; 09-01-2020 at 12:07 AM. |
|
09-01-2020, 06:31 AM | #27 |
Scooby Newbie
Member#: 301042
Join Date: Nov 2011
Location: UK
|
Maybe pm TWF on the s2Ki forum - seems to have had some success with KW.
https://www.s2ki.com/forums/s2000-ra...982942/page10/ http://robrobinette.com/S2000KWV3.htm |
09-01-2020, 10:47 AM | #28 | |
NASIOC Vendor
Member#: 54202
Join Date: Feb 2004
Chapter/Region:
MAIC
Location: Elkridge, Maryland
Vehicle:ASK ABOUT NEW RCE SWAY BARS FOR STI |
5 kg/mm front and 4 kg/mm rear on a GD means suspension frequencies of (roughly) 1.7 Hz front and 1.85 Hz rear. That's plenty good, not that far off flat ride, and those rates do work well on Tarmac 0s.
4.5 kg/mm front and 4 rear would probably a little over-damped up front but those suspension frequencies would be nice on a mixed tarmac and gravel street car. Closer to flat ride if that's important to you. We've not tried those rates on the Tarmac 0s for GD platform. It's also not easy to find springs at 4.5 kg but I think you can get Eibach 250 mm length. Again, haven't tried that on our Tarmac coilovers! Flat ride is an important consideration, but not the only consideration when choosing spring rates! Also if you're at stock height, you're too high. That can actually make ride quality worse. I'd recommend around 14.25 inches center of hub to fender for you. Our RCE SS1 coilovers do have adjustable rebound damping and tend to ride a little smoother than our Tarmac 0s. The Tarmacs are a little more aggressive and performance focused. Quote:
- Andrew Last edited by RaceComp Engineering; 09-01-2020 at 10:55 AM. |
|
09-01-2020, 11:53 AM | #29 | |
Scooby Newbie
Member#: 509092
Join Date: Dec 2019
|
Quote:
Hey Andrew! Thanks for the clarification. Yes I have been talking to some members on your team a bit. Glad to get some more clarification that this is okay to do! The whole flat ride thing goes a bit over my head... As far as ride height goes, I am actually on spacers as well (1/2F,3/4R) and the preload for the coilover is about right in the middle so I am thinking I am prb right around where I should be. And yes the bushing need to be changed!!! but the car has been inspected and they are in "decent" shape. But that's the next project! Hoping these softer springs give the ride I am looking for. |
|
09-01-2020, 11:56 AM | #30 |
Scooby Newbie
Member#: 301042
Join Date: Nov 2011
Location: UK
|
That's within 0.05Hz of my calculations
But, with 5/4, flat ride is going to be centred around 115mph - not bad for a track day chassis. Whereas 5/5 - the rear frequency would be 2Hz, which is high, for a pure road car, but flat ride would be centred around 50mph - better for a road car. For a road car, flat ride is the most important design criterion. Last edited by 2pot; 09-01-2020 at 12:01 PM. |
09-01-2020, 12:18 PM | #31 | |
Scooby Newbie
Member#: 509092
Join Date: Dec 2019
|
Quote:
Just out of curiosity, what does 4/4 give you? |
|
09-01-2020, 12:19 PM | #32 |
Scooby Newbie
Member#: 301042
Join Date: Nov 2011
Location: UK
|
|
09-01-2020, 02:13 PM | #33 |
Scooby Specialist
Member#: 20952
Join Date: Jul 2002
Chapter/Region:
MAIC
Location: Baltimore, MD
Vehicle:BRZ & Datsun White & White |
doh, wrong name.
|
09-01-2020, 02:14 PM | #34 |
Scooby Specialist
Member#: 20952
Join Date: Jul 2002
Chapter/Region:
MAIC
Location: Baltimore, MD
Vehicle:BRZ & Datsun White & White |
doh again!
|
09-01-2020, 02:15 PM | #35 | |
NASIOC Vendor
Member#: 54202
Join Date: Feb 2004
Chapter/Region:
MAIC
Location: Elkridge, Maryland
Vehicle:ASK ABOUT NEW RCE SWAY BARS FOR STI |
Quote:
- Andrew |
|
09-01-2020, 02:15 PM | #36 | |
NASIOC Vendor
Member#: 54202
Join Date: Feb 2004
Chapter/Region:
MAIC
Location: Elkridge, Maryland
Vehicle:ASK ABOUT NEW RCE SWAY BARS FOR STI |
Quote:
It's a lot of mileage so I would definitely take a close look at them. Tire/wheel package also important. - Andrew |
|
09-02-2020, 06:33 AM | #37 |
Scooby Newbie
Member#: 301042
Join Date: Nov 2011
Location: UK
|
|
09-02-2020, 08:33 AM | #38 | ||
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) |
Quote:
Quote:
IOW, flat ride considerations should perhaps be taken as different boundary lines to a problem in linear programming rather than the primary driving input. A more complete solution should probably be considering the absolute frequencies, damping, and speeds consistent with the intended use. Norm |
||
09-02-2020, 09:46 AM | #39 |
Scooby Newbie
Member#: 301042
Join Date: Nov 2011
Location: UK
|
I think you can simplify it further than that:
Rear frequency - 1.8Hz for smoother roads, front frequency to deliver flat ride at 60mph. Rear frequency - 2 Hz for occasional track day car, driven to circuit, front frequency to deliver flat ride at 100mph. Be advised that the 2Hz rear will give less grip on the road. Also be advised, that ill-chosen damping will then undo all the good works done, when selecting the spring rates. Last edited by 2pot; 09-02-2020 at 11:05 AM. |
09-02-2020, 01:02 PM | #40 |
Scooby Newbie
Member#: 509092
Join Date: Dec 2019
|
LOL I ask myself the same question. I have never had any experience with coilovers and the RCE's seemed like a great alternative. Realistically I should have gotten a gravel spec suspension. The car handles like its on rails but I have my Z for that...
Im confident that putting on the 5/4k springs will get me where I want! We'll see... |
09-17-2020, 09:27 PM | #41 | |
Scooby Newbie
Member#: 509092
Join Date: Dec 2019
|
Quote:
Front https://www.summitracing.com/parts/eib-100025300250 Rear https://www.summitracing.com/parts/e...RoCywAQAvD_BwE Ideally I would revalve but not possible with with these KWs... Thanks! |
|
09-18-2020, 11:18 AM | #42 | |
NASIOC Vendor
Member#: 54202
Join Date: Feb 2004
Chapter/Region:
MAIC
Location: Elkridge, Maryland
Vehicle:ASK ABOUT NEW RCE SWAY BARS FOR STI |
Quote:
Those are the wrong inner diameter but I think I have something for you. - Andrew |
|
Thread Tools | |
Display Modes | |
|
|