Highly suggest cortex, theirs are custom made JRI shocks (they are monotube) and JRI was started by a few ex penske engineers. They will do just about anything you want except use lower gas forces / pressure for softer total damping. They do this for liability reasons, they are not comfortable making an educated guess how low to go. Gas force directly relates to available compression at a given shaft velocity. So too little and you get cavitation and major hysteresis. Too much gas force and the "Cracking force" becomes higher, meaning you can see 50+lbs of initial force needed to see shim deflection BEFORE any meaniful damping begins (sort of like an additional 50lbs/in spring force). Roehrig calls it "Force at Zero Velocity" https://www.dropbox.com/s/kg9n7ftfe7ugrey/Force_at_Zero_Velocity_Explained.pdf?dl=0 -- I linked their paper for you, I recommend checking it out, even if you end up not caring about the technical execution it can potentially help you ask informed questions when you are ready to buy.You and me both. The plan was for proper coil overs this winter, but the motor refresh wiped me out. I keep doing everything backwards as I break parts. If only I had broken the stock suspension first
A set of Cortext/MCS coilovers are definitely on the list for this offseason if my wife doesn't end me.
With the info I supplied in my long term damper project thread I spoke with Cortex / JRI, then based on your recommendation 5.2 and a few others. All agree (with regards to my targeted use case) I presented them with a valid justification on my specifications. I have not had the same experience with MCS and I have not had anyone who uses them give me much in the way of useful info.
To echo my posts on M6G, I'd address the following;
-Potential aero balance // Add to front aero, or raise front ride height to shift aero balance forward (result produced by rear wing being taken out of the airstream relative to the front)
-Potential alignment // you did post pics potentially revealing an alignment issue
-Soften front springs or ARB
-Stiffen rear springs
-Address low speed damping issues (increase total low speed damping // add LS compression front // take away low speed compression rear