Corning weighting / flat flooring

[Skydragon]

For those who setup their Seven and do corner weighting / flat flooring...what % weight distribution do you aim for when adjusting the spring platform heights.

there seem to be two schools of thought.

a) Set the car up so FL+RR = FR+RL ie. balanced accross the diagonals

b) Set the car up so FL=FR and then let Rl and RR be what they will

(I'm not looking for info on how to flat fllor, I already know that, just what end results people on this forum aim to get when corner-weighting).

Cheers ;-)

[exfordy]

I buiult a Roadsport SV Sigma 150 purely for fun road use; I don't plan to do track days. I had it set up diagonally which I gather is better for cornering rather than left and right front which I gather is better for emergency stops. Odd really - you'd think I go for left / right.

[Nicodema]

Diagonal works great with fully independant suspensions, e.g. CSR, but I have been assured that DeDion interferes with the technique, and so it's best to go with a setup centred around getting the fronts equalised. We actually got ours flat floored with a passenger as we mostly drive two up, even on track. That actually means that we've ended up with a setup that's actually pretty neutral diagonally too.

[Yellow 7]

I used to mess about with this a fair bit. FL = FR or near to is what ~I used / liked.
Then at track I'd adjust a front damper to get nice max braking stability & effect into say a hair pin - Druids at Brands for example.
At level damper settings a de dion 7 with driver of ~80kgs will need the RR damper / spring raised by about 1.5" to achieve close to what a flat floor session would achieve.
It's all a bit academic as there is no such thing as a flat road and a 7 has an offset driver position so unless you do it with equal weight passenger in the car also you can only achieve so much.
Rake also has a profound affect on handling under power out of corners and stability under braking. I liked 20-24mm rake.

[David Long]

This might be thinking a little too far outside the box, but I’ve had some good results by jacking the car under the diff with a small block allowing it to pivot with the wheels just off the ground. Then, with the front wheels sitting on a levelled plank and the car loaded in track trim, I level the car. The process is then reversed and the rear set by pivoting it on the front crucifix.

When you think the maths through, it basically matches the weights diagonally. I was surprised by how well it seemed to work.

Edited by David Long on Saturday 5th February 17:27