what spring rate recommends for a E36 M3 Track car?

ther are a H&R coilover kit with 720lb/inch in front and 670lb/inch in back
and clubsport settning on shocks that i thinking of,

but want to know what you guys drive with and how satisfied you are.

Depends on track, tires, weight of the car etc. Dosn't sound too bad. Try it and see what the car feels like
Dale

wouldn't those rates make the car understeer? seems like it should be 670front and 720 rear. only from what i've read...

H&R spec 130N/mm in front and 120/mm i rear for this clubsport chassi

they also have a race kit with 180N/mm in front and 240N/mm

the race kit seems to be very hard
to hard for my car that i drive the way to the track.

wouldn't those rates make the car understeer? seems like it should be 670front and 720 rear. only from what i've read...

It depends on about 1000 different things, from anti-roll bar settings to tire widths.

slightly off topic:

what are the metric measurements for springs.
we use lbs. per inch (not metric)
now i see Neutons per mm,
i've also seen Kg used but don't know what the distance measurement is. can anybody chime in?

slightly off topic:

what are the metric measurements for springs.
we use lbs. per inch (not metric)
now i see Neutons per mm,
i've also seen Kg used but don't know what the distance measurement is. can anybody chime in?

The simple one I use is when I see H&R spring rates is I multiply by 5.71 to convert to lbs/in. I'm pretty sure H&R uses Newtons per meter.

Kg I use for mass haven't seen it used for spring rates, I also use it for density but that's per a distance cubed, usually millimeters.

-Carlos.

It depends on about 1000 different things, from anti-roll bar settings to tire widths.

of course, but most all the E36 track/club racers with stock pickup points seem to use higher rates in the rear than the front. the autocrossers seem to use the opposite, but it seems starting with understeer from the spring rates would require quite a bit of compensation from the sway bars, tire pressures, alignment settings etc. just my thoughts

Like I said it depends. The actual wheel rate in the rear is less than the front. You can get a car to handle without running stiffer in the rear. For instance we have cars with over 800 front and are at 600 rear. No push, but the car is set up for that. So many variables, so much heresay. You just have to drive the car and see what it does for you.
Dale

I actually prefer a stiffer front spring on e36/e46's. On my e36 I had 900 front, 700 rear, with huge bell motorsport front/rear bars and it was awesome. To me anyways, it makes a better "point, plant and shoot" setup. Takes driver preference and setup for the specific tires/conditions.

I'm looking forward to having a cockpit adj front swaybar, should help really dial in the handling for conditions easily. Vernier controller should help fine tune, as its not linear along the blade rotation.

some friend of my drives with 680lbs/in in front and 850lbs/in rear
and he is pretty ok with it. so i am thinking of do it my self.

coud you give me some tip of how a am going to feel in the car if a nead i harder och softer spring front/rear