Gansei,
I know this is going to sound crazy to others but just give it a try and please let me know how it works for you:
Front
start with 1º of toe out
stiffest front roll bar
40 wt shock oil with 1.3 mm holes (this will depend greatly on the tracks surface)
2mm caster (right in the middle position)
shocks is lowest position
blue springs
2 or 2.5 camber and adjust according to tire wear
60k or 70k wt oil in the front diff (only to prevent oversteering out of the turn because I am already using 50k in the back diff)
2mm or 3mm of droop
Rear
3.5º toe in!! (I know, I know)
between 3º and 4º of camber
50k wt oil in the diff!! (please try it)
50 wt oil in the shocks with 1.3 mm holes also
purple springs, maybe acquas
original antiroll bar, totally flat (I know you are using the Mugen one, but please remove it for the trial!!)
shocks at the lowest position as well.
do not use the down stops at the back to allow lots of weight transfer to the front.
Keep your roll centers as per the out-of-box settings
You will get some drag on the straigthaway from this setting, but it has given me plenty in-and-out of the turn steering with no wash-offs.
You can keep tire shores the same from front to back or 40 fronts and 42 rears. The only reason for me to use harder rears is that our track is very abbrasive and this helps keep tire wear closer front to back, as does the 2mm split. Tire shore is obviously dependant on track conditions but keep them close from front to back.
While testing, I found that using 50k oils in the diffs front and back at the same time gave me too much steering out of the turns. But, if you have higher traction than I do, then you could even try using that same oil front and back. Since you already have 50k at the front, just change the back diff and start off with the rest of the settings you already have.
I see you are a proficient mechanic, so this experiment should not take you a long time.
Please give me your inputs when you get a chance!
