My sleeve is long enough that the washers are always snug against the sleeve with the top nuts tight. This leaves only the bushing to flex but the sleeve is never moving relative to the washers.

 

Wheel lift is a trait that varies by chassis. A Subaru or Evo will pick up a rear under hard cornering while a BMW will pick up a front. Typically, wheel lift is a lack of droop travel, not an excessive amount of it.

Full droop is nearly impossible because of any combination of the following:

• Shock damping
• Anit-roll bar
• Bushing pre-load
• Shock droop travel
• Spring lengths

In my past experience, a BMW will pick up a wheel with a stiff front bar and insufficient rear spring. A Subaru will pick up a wheel with insufficient front spring and a stiff rear bar. For both, the tricks to make them fast cause their quirky wheel lift. I removed my rear bar to limit rear wheel lift on the S2000, but I have yet to drive the car with real suspension.

 

In theory.

I removed the sleeves from the rear as a test and still had the sound. My threads are not a limiting factor, and the nut has been tightened down as much as possible.

It sure sounds like shock knock, but not sure what's going on. I just got my stock top hats and bushings back and plan to install the stock rear shocks as a test to see what happens.

It's either the Penske installation or something to do with lowering.

 

I'm fighting some rear knocking as well. I'm going to up my nitrogen canister pressure from ~125psi. Whenever this sound showed up on the ASTs it was nitrogen. Never correlated it to a specific pressure, unfortunately.

[QUOTE=Moton]
Dampers with 22 mm outside diameter piston rod (struts)

 

Does the noise go away at anytime? When it's cold or when the shock is hot.

 

The noise does appear to be less after warm up. Jim Reyenga also mentioned this to me for his case.

The event I did last weekend was during 95-105 F day and I don't recall hearing it at all when driving off the lot and slowly down a gravel road.

I usually hear the noise between 1 - 25 MPH when going over small bumps like in my gravel drive way.

 

Moton Clubsports have 22mm shafts for the S2000.

 

Two drivers, 11 runs with 5 min between runs, both drivers in the car for all but two runs, unsealed asphalt, ambient temp of 95*F:

You can see some slight beveling on the outer rib (the one with the flames on it). It is only present on the front tires. Pressures started at 32psi F/R and we let them creep to 35psi F/R. We attempted to spray with ice water twice and both efforts resulted in an increase of sliding, power oversteer, corner understeer, and braking distances.

The car drove exceptionally well for a first setup attempt. It exhibited mild understeer with controllable throttle steer. Lift rotation was stable and oversteer was easy to catch (or induce). VTEC did not unsettle the car nor did lifting in 1st mid-corner for a shift to 2nd. I encountered fuel starvation in three places following big left-handers while my co-driver did not encounter starvation. My steering was more abrupt and my lines kinked. Starvation happened at an indicated 1/3 tank.

Results can be found here.. My car is STR 79/192 and driven 2nd heat, Jason Minehart is XSTR 86 and drove 1st heat, and Dan Pedroza is DSTR 86 and drove 3rd heat. Dan drove Jason's car for the first time after Dan's competition CS runs. Jason is still on his original Toyos but believes they are falling off.

[EDIT] I forgot to mention I'm now missing three or four fender liner clips.

 

More pressure. Should be up near 40lbs - especially with that little camber and roll stiffness up front.

You need heat. Don't spray them unless they go over 130-140deg.

If there are more than 50runs on Jason's tires then he's probably losing about a full second off fresh Toyos.

 

I know for a fact he has more than 50 runs on those tires. Dan is talking about possibly co-driving with him at Nationals instead of running the MS-R in CS, should be interesting

Rob and Jon were definitely not far off for the first shakedown runs of the car though.

The DP car is still waiting on an engine, and it's getting close to divisional time, looks like I will have to get wheels/tires for the S2k sooner than I expected...