Link to dyno plots? I'm full stiff on my JRZs in the front and talking About revalving to stiffer. My shocks full stiff are like Matts motons at 90%ish. Hmm.

 

These are dyno plots of the shocks at 10 clicks off full stiff





-Marc

 

Certain for now, but that is based off of Blytheville, Toledo, and Peru Tours. Lincoln may be different.

This is the same picture many of you saw on FB, but gives you an idea of the suspension travel with the settings listed above.



-Marc

 

This is going to sound counter intuitive, but you could up your spring rate to better compliment the valving. If the suspension frequency is too low, the car will be over damped and numb, not allowing the tire to work well with the surface - it will skip, as you've reported. It also seems like your roll rate could be too soft.

On the other hand, Geoff walker uses a similar setup on his car, but with stock sway bars. It could be that the transition from lowspeed to highspeed is better with different shock architecture - He uses motons.

Good luck, and I look forward to seeing it in Lincoln. I'll be driving in a mx-5 this year though.

edit: just looked at your pic...That's lowzilla!

 

Heres my JRZs for reference (if anyone cares) I'm liking full stiff on compression in the front and about middle for the rear. I guess the difference if my shocks tapper off more in the high speed compression range. I also have more low speed compression. If thats 10 clicks off full stiff I wonder what the rates look like at full stiff. In the high speed dampening range you have more at this setting then I do at full stiff on my shocks. Although like I said I have more low speed. That may help with bumps and the reason I'm not noticing any ill effects running so "stiff". Or maybe I just suck and don't know anything but it seems to work.

rebound in the front is almost full soft and rear on my car is in the middle.

soft, mid, stiff

 

They get pretty ridiculous at full stiff on compression - somewhat similar to the Moton/JRZ curve but some more high speed. At lower settings the low speed is really low unlike the motons.

 

I will let Beau confirm, but at my request the valving is somewhat unique, different than Mac's valving and the raceline series. I don't have a chart of my shocks at full stiff. When I had PSI build these, we were focusing on the "middle setting" and trying to match it with the spring rates, bumpy auto-x lots, and aggressive steering inputs. They are different than Mac's, not sure about units built after ours...

-Marc

EDIT... With Jon's CR (Moton Motorsports? Whatever series had lots of adjustment), we were constantly softening the shocks in the rear until we were at full soft and only a couple clicks of rebound. They were on full soft for compression up front and the same rebound up front. We did this during the Evo school and TnT at Dixie on a transition heavy course. His car had similar issues at first. Push, Push, then oversteer. The settings listed were a "comfortable" setting for Junior but was still needed improvement. As soon as we switched to Dunlops, the car felt pretty neutral. With more toe-in and a MX5 rear bar, I think Jon's car would be fine. Not sure what his setup is. I'm sure one of the NC/SC guys know?

 

The chart I posted is what Beau gave me when I asked him for the STR valving at the end of April of this year.

Edit: and the 10 clicks from full stiff looks identical to yours, I'm guessing it's the same valving

 

The thing i did not like about the curves of these shocks is at the lower settings they become almost linear. The high speed slope is also higher than Moton JRZ. I had asked Beau if he could change the valving to be more digressive since at around 50% they become almost linear. His reply was i could upgrade them to 3 way in the future by adding high speed adjusters. Attached is a Motons plot i saved from someone posting it on this forum a while back..

 

Thats Matts shock dyno ^^^ I like how the moton/jrz are digressive. Alows alot of low speed damping for quickly loading up (transfering weight) but also allows the shock to absorb bumps and be streetable.