Looking at some plots others have of JRZ, seems to be correct. The low settings on the JRZ rebound seems to be a REALLY low setting. Maybe a comfort thing?

 

It was so many years ago when the car was last driven and crashed with the JRZ, I can't remember but I may have sent the JRZ to Olsen with the settings that way. I sent the dampers to Olsen to be inspected, rebuilt, and did not ask them for a dyno chart of any particular settings/data etc. They just did what I asked and then provided the chart on their own accord without me asking/knowing when they returned them.

Maybe they just dynoed them the way I sent them? Whatever the case, this was Olsen providing them as "we fixed your shocks, they work, here's a dyno" not JRZ showing them as "Here are how our dampers perform on our website for your reference vs. other brands"

 

Looking at my graph, it looks very close to what yours does.

I also sent mine to Olsen to get them valved for the rates I needed. I recently sent mine back in again to get them lengthened so I'll see if they can get me a dyno that shows the range from full soft to stiff on rebound. If so, I'll post it up!

 

That's what I'm guessing as well in regards to the comfort theory.

I had a chance to drive an evo with JRZ RS2's on 12kg/14kg rates and it was by FAR the most comfy setup I've driven on in this chassis (I've driven evos on well over 10 different coilover setups from entry level to high end). This is was a big part of the reason why I went the JRZ route this time around as my car does still get driven on the street and it will drive to Lincoln as well.

 

Yes, JRZ RS2s are known for particularly comfortable valving while still performing well, of course depending how you set them up. I would not expect the dyno graph to look the same as many others.

 

This is the first JRZ dyno plot I've seen with essentially zero rebound damping at low speeds, though. That's the part I don't understand.

At 1.0 in/sec, the rebound damping barely separates from the x-axis.

 

Cozy ride

 

Artifact of doing a full stiff compression full soft rebound plot. The hysteresis pushes the average up towards zero. Still don't expect much low speed damping when the bleed is all the way open.

 

After a quick search, I've seen a handful of various dyno charts that have similar looking rebound, on what I'd have to assume is the softest rebound setting. JRZ, Moton, MCS, XIDA, Penske, etc.

I can definitely as Tim Olsen at Olsen Motorsports as to what the explanation is. It would be nice to see the range from full soft to full stiff of the JRZ's, but there are plenty of dynos on their website as well.


Hey, if you can have the best of both worlds, why not? I truly hope these are the best of both worlds, but time will tell when I actually get this thing back on the ground.

 

Are there any particular damper settings I should ask Tim at Olsen Motorsports to dyno that you'd recommend?