Quote:
Originally Posted by Ginger_Extract
The dampers are nice units, however, if I was doing my build over again (I've since demodded my track 1er and made it a fun daily), knowing what I know now, with my old setup (255/265 track tire, max effort stock body fitment), my car was way too soft with 400 lb/in fronts and a 700 lb/in rear spring. Tire wear sucked and the car handled lazily.
Even with my stock body fitment, I would start at something like 500 lb/in fronts and a minimum 800 lb/in rear spring, and probably settle on something like a 900-1000# rear spring, given the awful motion ratio that the E82 is working with. If those shocks can keep up with spring rates in that area, great!
I suspect with that big wing, you'll end up migrating towards a very stiff rear spring in the end.
For perspective: my new track chassis has the same basic suspension setup, similar tire sizing, less weight, with a slightly better rear end MR and I've landed at 600/1000, no aero, and it's fantastic. A lot of factors (setup, tracks, driver preference) go into the numbers I'm tossing around, so consider it a rough starting point, and information I wish I had all those years ago.
Be mindful reading the forums here that most people parrot information blindly, and the actual fast drivers have long since learned from the collective thoughts and posts from years ago. I listened to this the "common consensus" on here many ears ago and my car sucked to drive until I started thinking more critically about setup and actually testing changes on track, and backing them up with lap times...
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I noticed most people and vendors on this forum recommend soft spring rates, why? I have no clue, maybe the shocks can't handle the higher rate who knows. I'd just call Bimmerworld tbh that's all they do 😂