RS*R Sports-i Coilover system installed (pics)

[Dimman]

Originally Posted by Racecomp Engineering

Lower frequencies in the rear can actually be done for more comfort or other reasons...its not necessarily the end of the world. The springs are not the only things that control the balance if the car. However, spring rates that are much much lower in the rear are not imo a good idea at all on this car. Sometimes companies do things without a good explanation.

The rates you posted might be very aggressive imo and probably a bit of a handful on a track without a big wing.

The RSR rates posted are pretty good, kudos to them. I agree that rates along those lines would be a good starting point for autox depending on other factors. An upgraded rear bar should be matched with a front if you want/need additional roll stiffness or want a quick easy way to adjust balance with those rates imo.

Cool to see what looks like a quality product coming for this car!

- Andrew

Thanks Andrew.

I was working on the suggested f/r frequency ratio first and next would be sorting out lateral weight transfer with probably extra bar stiffness in the front next. (Are we fortunate enough that they share fronts with the WRX too?)

With the availabilty of rear bars from the WRX and STI would it be easier for HKS to go with the bigger rear development wise and that played a role in their spring rate choice?

[Moto-P]

Originally Posted by Racecomp Engineering

Lower frequencies in the rear can actually be done for more comfort or other reasons...its not necessarily the end of the world. The springs are not the only things that control the balance if the car. However, spring rates that are much much lower in the rear are not imo a good idea at all on this car. Sometimes companies do things without a good explanation.

The rates you posted might be very aggressive imo and probably a bit of a handful on a track without a big wing.

The RSR rates posted are pretty good, kudos to them. I agree that rates along those lines would be a good starting point for autox depending on other factors. An upgraded rear bar should be matched with a front if you want/need additional roll stiffness or want a quick easy way to adjust balance with those rates imo.

Cool to see what looks like a quality product coming for this car!

- Andrew

Originally Posted by Dimman

Or the stopwatch.

What got me thinking about this is that the RS-R rates seem more appropriate to balancing the front to rear frequency properly than the HKS street rates, for example. The RS-R will probably be in the suggested .9:1 range (I calculated 1:1 with my preliminary estimates) but the HKS will be in the range of 1.34:1 which can cause some uncomfortable pitch oscillations over bumps. Their numbers actually look like they would be better reversed. A little bit confusing.

The RS-R does give a very comfortable ride, when damper rates are dropped to low end of the adjustments, even over the stock ones, and still yield a pretty usable stroke range. Oscillation issues seem to have been very well sorted on this one, making use of the ample stroke, and thereby allowing for higher rebound rates to reduce excessive motions. This is sort of how Koni and Bilstein sets behaves in performance applications are loved by autocrossers, giving you enhanced control in stages like slalom excercises and planting the driving wheel down on the ground and keeping it there. This, despite the nature of FT86's short stroke rear end by its inherent dimensions of the dampers. The initial compression is mild and almost gives a more expensive feel to the car, since the battering of unsprung weight is much more supple and compliant, while the pitch is reduced at the same time, very well with increased spring rates. RS-R has always developed i-Shocks with 'street minded" approach, and offers almost an uncanny range of more European thinking of letting the suspension do it's thing, giving a measure of predictable, compliant, and mature driving feel, and less boy-racer than most. But the easier roll and stroke control of RS-R Sports-i here, does contribute to much greater control of low to medium speed, low-inertial loading, making it perhaps ideal for things like autocross on street tires, where massive weight transfer is not always available at low speeds and making quick transitions with faster roll-center motion makes the driver more in control and ease the learning of how to drive at limits. Cusco seems to follow this convention often as well.

As for HKS, traditionally they have been a proponent of strong compression damping, giving somewhat of an opposite feel, very firm, and seems to like a hoppy, responsive ride and dynamic attributes in nature of race cars, but being a bit enthusiastic when used over rough surfaces. This holds true for most sports coil-over systems on the market today, where strong high speed stability and firm jolting ride seems more easily understood by general consumers and is effective at very high speeds, like those on a race car. High compression dampers are also used often to compensate for more inexpensive units with twin tube design which inherently have less stroke range per given length of the cartridge, especially when designed for ultra-low ride height compatibility. Some are excellent for intended use of sports driving, at high speeds and very sticky tires, but not always ideal for street if this is catered too far for extreme theoretical performance, some striking a balance in-between by different models as in HKS, Tanabe, and JIC.

Others, I am not too familiar but generally inexpensive ones almost always suffer from some elements critically lacking due to multiple applications made from simply adapting a wide range damper to be used on many different applications, and being less optimized for any single application.

I can't say though for sure on the many FT86 units though, as I've only used a lot of them in the past for S13, BMW M3, and AE86 applications.

It's all how you think and feel, and prefer... With the FRS, the sky is the limit, as the basic foundation of balance, rigidity, and driver controls are top notch, and like the old AE86, any and all modifications are easily felt and understood because of this. This is why we loved the AE86 and this is how the NEW 86 will be sure to have lots of fans among the new core driving enthusiasts.

[Moto-P]

Originally Posted by Staticfrost

CAn I buy RS*R Sports-i Coilover in Australia? The reviews and results sound very goood!!!

Yes, there isn't a distributor in Australia at this time, but since all i-Shocks by RS*R is built to order at this time in Japan, the USA office can take your order at competitive prices with favorable USD exchange over JPY, and have the i-Shocks drop-shipped directly from Japan to your location in Australia so it doesn't cost any more than it would to buy them in the USA, including shipment.
They have delivered a few to Europe as well this way.

RS-R USA
1802 Carnegie Avenue
Santa Ana, CA 92705

T: 949-833-7718
E: info@rs-r.com

Facebook: rsrusa
Twitter: @RSRusa

You can ask for Ben when asking and tell them it's Moto that sent you :P So they know how serious you are

[Staticfrost]

Originally Posted by Moto-P

Yes, there isn't a distributor in Australia at this time, but since all i-Shocks by RS*R is built to order at this time in Japan, the USA office can take your order at competitive prices with favorable USD exchange over JPY, and have the i-Shocks drop-shipped directly from Japan to your location in Australia so it doesn't cost any more than it would to buy them in the USA, including shipment.
They have delivered a few to Europe as well this way.

RS-R USA
1802 Carnegie Avenue
Santa Ana, CA 92705

T: 949-833-7718
E: info@rs-r.com

Facebook: rsrusa
Twitter: @RSRusa

You can ask for Ben when asking and tell them it's Moto that sent you :P So they know how serious you are

Thanks Moto, what option should i be specifying when I am ready to place the order?

[sirus]

Originally Posted by Moto-P

Yes, there isn't a distributor in Australia at this time, but since all i-Shocks by RS*R is built to order at this time in Japan, the USA office can take your order at competitive prices with favorable USD exchange over JPY, and have the i-Shocks drop-shipped directly from Japan to your location in Australia so it doesn't cost any more than it would to buy them in the USA, including shipment.
They have delivered a few to Europe as well this way.

RS-R USA
1802 Carnegie Avenue
Santa Ana, CA 92705

T: 949-833-7718
E: info@rs-r.com

Facebook: rsrusa
Twitter: @RSRusa

You can ask for Ben when asking and tell them it's Moto that sent you :P So they know how serious you are

Hi Moto-san,

Do you mind if I use your name as well?

[cyde01]

dang moto-san you sold me on the rs*r i-sports, i just gotta save up or get a raise so i can buy the car first...

[Staticfrost]

I found these - http://page12.auctions.yahoo.co.jp/j...ion/p286747814 how can I confirm that this has the same settings?

[Nardi330]

It looks like u can choose spring rates.

soft F5k/R7k or hard F7k/R8k

[Rawdog]

Any reviews on that air filter you dropped in?

[zoomzoomers]

Wow awesome! Congrats on the new setup.

[Moto-P]

Originally Posted by Staticfrost

I found these - http://page12.auctions.yahoo.co.jp/j...ion/p286747814 how can I confirm that this has the same settings?

yes, but if you buy those, that is about $1860 in today's dollar without shipping!!!! So you might as well buy it direct from RS*R USA so you can get this for about $1950 (INCLUDING Shipping to your door in the USA from JAPAN!!)

[Moto-P]

Originally Posted by Nardi330

It looks like u can choose spring rates.

soft F5k/R7k or hard F7k/R8k

Yes, the 7-8 combo is for ultra low ride height applications or for recommended 35mm drop with race/competition tires, for serious competitions.

The 5-7 combo is ideal for complaint ride (which I remind you is AWESOME for the street and mild track use with comfort better than stock due to expensive valving and afforded long stroke design). And is designed for street radials and spirited Sunday racing.

[Moto-P]

Originally Posted by sirus

Hi Moto-san,

Do you mind if I use your name as well?

Yes, you might save a few bucks since it will become a referral. Also getitng together with 3-4 buddies will also save you some as well since they can ship them to LA as a batch order. Might take a little longer but if you want to save, that might be a plan too. Call Ben though at RSR USA, as I can't quote anything as prices will always change slightly according to exchange rates of currency and shipping variables from Japan.

[sirus]

Getting my RS*R suspension fitted next Wednesday! I'm over this whole monster truck madness

[denkigrve]

Originally Posted by sirus

Getting my RS*R suspension fitted next Wednesday! I'm over this whole monster truck madness

They feel super nice. Mine didn't come with any rubber gaskets for the springs like Moto's have. He said he pulled those from another older set of coils and used them. I'm trying to see if RS*R can send me some as I'm getting some harmonic noise under acceleration from 3k-4k RPMs when the car is shifting more of the weight to the rear. My best guess is that something to cushion that spring to metal contact should stop that noise, or I could dial the pre-load down a MM or two. I did some homework and it could be a valving thing as well. I'm currently driving with the coils set to 3 clicks up from softest, but I'm gonna try to adjust again and see what impact that has.

[Memphis]

Whats up with the black rotors?

[sirus]

Originally Posted by denkigrve

They feel super nice. Mine didn't come with any rubber gaskets for the springs like Moto's have. He said he pulled those from another older set of coils and used them. I'm trying to see if RS*R can send me some as I'm getting some harmonic noise under acceleration from 3k-4k RPMs when the car is shifting more of the weight to the rear. My best guess is that something to cushion that spring to metal contact should stop that noise, or I could dial the pre-load down a MM or two. I did some homework and it could be a valving thing as well. I'm currently driving with the coils set to 3 clicks up from softest, but I'm gonna try to adjust again and see what impact that has.

When you say you didn't get any "rubber gaskets for the springs", do you mean at the top of the spring or the base? Mine look exactly like Moto's with rubber at the base of the spring on the fronts but not the rears. Is this what you meant?
Cheers.

[denkigrve]

Originally Posted by sirus

When you say you didn't get any "rubber gaskets for the springs", do you mean at the top of the spring or the base? Mine look exactly like Moto's with rubber at the base of the spring on the fronts but not the rears. Is this what you meant?
Cheers.

Yeah mine didnt have the rubber at the top and bottom. i reached out to RS*R, but havent heard back yet.

Did you get camber plates? Wondering if that's the difference.

[sirus]

No I didn't get camber plates...

[ill86]

Update?

[denkigrve]

Originally Posted by ill86

Update?

What're you looking for? I'll see if I can help now that I have a few hundred miles on mine.

[ultra]

Originally Posted by denkigrve

They feel super nice. Mine didn't come with any rubber gaskets for the springs like Moto's have. He said he pulled those from another older set of coils and used them. I'm trying to see if RS*R can send me some as I'm getting some harmonic noise under acceleration from 3k-4k RPMs when the car is shifting more of the weight to the rear. My best guess is that something to cushion that spring to metal contact should stop that noise, or I could dial the pre-load down a MM or two. I did some homework and it could be a valving thing as well. I'm currently driving with the coils set to 3 clicks up from softest, but I'm gonna try to adjust again and see what impact that has.

Did you get your vibration issue sorted out and if so, how?