Originally posted by AMGRacer
Hard to say without looking at it in my hand. Longer arms make the car more stable and less prone to roll/pitch. If the upper arm is shorter it will affect the camber change and if the upper arm is more angled it will lower the roll centre. That is all I can say for now
I must say that I am routinely now using lower shore tires on the front and softer front springs than rear (eg. black front and rear rear) This is mainly to try and get the car to turn in hard (note I am going into corners pretty damn hot without brake usage) More front bite I think will balance this car out rather than more rear bite. My experiments with the M1RR rear end proved to be very successful in some ways (rear was more stable in some circumstances) but it actually removed a lot of steering from the car exacerbating the slight tendency to understeer. Bring on the EVO!
Hmmm . . I thought that both upper and lower EVO arms were longer.
Ahhh, I guess we'll really need to see it.
On the set-up front, we haven't used the M1RR rear end yet, partly because there are so many other things I wanted to try in order to get a proper base line. I think I mentioned that I couldn't get the super hard Fantom springs to work for us, and I dare say there are track differences underlying part of this.
We have seemed to have settled on black front and gold rear springs, lately, for Lilydale - some of this was intended to kill a bit of rear grip and, thus get some more steering.
For tyres, we also run softer fronts than rears, and yes, this gets the desired steering. Interestingly, the F/R balance seems better and more forgiving, also. In fact, we ran 35F/35R at Lilydale last meeting, which was a bit OTT but the grip obtained was tremendous, though tyre wear was worse, as you might expect. We run Active tyres, and they seem more forgiving of a "too grippy" tyre choice and the weather differences in Melbourne are more marked than Brisbane and this would account for part of it - the last meeting at Lilydale was only 14º C or something.
With this grippy set-up, I run less rear toe-in (maybe only 1.5º) and it keeps the rear more progressive and less "snappy" - helpfull when you really do have too much grip.
We're also running the car higher than usual - 5.0 front and 5.5 rear, together with more tightly limited droop - I'll need to take a measurement.
I'm pretty happy with this set-up even though it seems a bit strange - and the Mugen's don't seem to have anything on it, any more.