Pics of S2000 snow bird parts leaving Florida for a summer vacation break in Sullivan, Wisconson.

http://albums.photopoint.com/j/ViewPhoto?u...&p=52629135&f=0

The rotor shields come back professionally vented, and better yet, MOUNTED

 

Update?? has king developed a rear kit yet??

 

Just wanted to add a bit on what's going on here.

When your wheels move up and down, the a-arms are designed to follow a certain arc.

More often than not, the tierods are longer than the a-arms, due to the steering rack necessarily being shorter than the distance between the chassis mounting points of the driver and passenger side a-arms.

Because of this, the tierods follow a different arc than the a-arms. The lateral movement of the tierods compared to the a-arms causes some movement of the steering spindle on that particular side, causing the tire to either toe-in or toe-out. This in turn tugs the car in the direction the tire toes to, causing bump steer.

By moving the plane of the steering rack and tierods, King is able to get the arcs better aligned on a lowered car, thus considerably reducing bumpsteer.

This explanation is a little simplified, but it's essentially what's going on down there.

I also assume that the same condition happens passively in the rear, and is what instills magazine writer comments of "twitchiness" on lowered S2000's.

 

King modified steering rack re-installed. King modified uprights including welded rotor shield vents re-installed. Ben's CF brake ducts and 2.5" SCAT tubing installed. Rick's black powder coated calipers installed and we are moving over to the alignment shop. (Thanks cdelena for your earlier inspiring brake duct posts)
Alignment specs from King:

1/16" toe out front
1.5 degrees negative camber front
As much castor as possible front

1/4" toe in rear
2.5 degrees negative camber rear

Two more weeks until the 16" Regamaster wheels are state-side, but seeing as they are the same diameter there should be no problem doing the alignment now on stock rims. As far as the usual "you should be in the car during an alignment" saga, with the Mugen front strut valves closed and the rears backed off 1 turn, the driver's weight doesn't effect the car's front height at all, and no more than 1/8th inch rear so it's probably not necessary.

 

Good explanation, but the genius is to what degree the parts are massaged...

And that doesn't explain the main problem- why did Honda design bumpsteer into the car, and why did they choose to control it with high spring rates in the rear? Think about it- if the rear lets go before the bumpsteer upsets it (under street driven conditions) you never experience it, but under track conditions where you push the car far more and actually use the suspension instead of bouncing over the bumps at slower speeds, it's very apparent...

The suspension tuning issues are very relevant to everyone here- I never had such drastic problems with other cars. My old Integra Type R never had those issues- with the Mugen "low down" suspension and sway bars, it never bumpsteered. With a lowered suspension, usually you would ultimately have a shorter suspension travel- actually minimising bumpsteer. Or, if you have properly designed shock system, the short stroke system would minimise it in the same way.

In a nutshell, this shows that you can't just slap a suspension system on and expect results- since the basic suspension design of the S2000 is flawed from the R&D tables...

Hey 4373-

So have you driven your car yet? Any thoughts? I had my own conclusions that I shared here...

 

No don't have it back yet. The alignment shop called my mechanic and said it was done, but when he went to pick it up the printout proved otherwise. They are going to make another run at it after lunch.
I don't anticipate a track event until October 13th at Homestead-Miami Speedway to really push it, but I'll try to find some back roads through the orange groves to get some input.

 

[QUOTE]Originally posted by meat
[B]It is definately something that Scott and the King crew came up with.

 

GTRpower - from what i remember with the itr's and Honda Front drivers are that all rear suspensions have been designed to toe out when compressed.

In fact what i have found is that it is a good thing as it helps the car rotate through the corner.

A different scenario arises for a rwd like the s2000, which probably does not need the same toe out characteristics of a fwd car. - which is why the bumpsteer issue arises.

 

[QUOTE]Originally posted by tze
[B]GTRpower - from what i remember with the itr's and Honda Front drivers are that all rear suspensions have been designed to toe out when compressed.

In fact what i have found is that it is a good thing as it helps the car rotate through the corner.

A different scenario arises for a rwd like the s2000, which probably does not need the same toe out characteristics of a fwd car.

 

To say I am anxious to test drive my Honda is an understatement. Car is complete as per the aforementioned alignment specs with eight degrees front castor. I'm flying back into Florida very late Friday night and will be picked up at the Ft. Lauderdale Airport by my Girlfriend with my car.
At that hour (Sat 1:20 am) I will get to start my test drive by avoiding drunk tourists in rental cars until I can get out to the backroads in the middle of the state.
I will update the thread Sunday after a couple good test drives Saturday and a well deserved first class night on the town for my girlfriend.
Almost as much as I miss my car I miss my desktop. If you're used to broadband you have no idea what it's like to be in a hotel on a laptop using dial-up. I love this board and it passes time on the road, but it's like night and day at 56K and 140K.