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E36-italia: How do I achieve zero bumpsteer? Swapped to an e46 steering rack and e36 tie rods, I have a some ability to shim it up or down but it's currently at the lowest position.

Theory is quite simple, yet difficult to do.. when your steering arms are moving up/down exactly parallel to your lower wishbones then you have zero bumpsteer.. but the moment you do steer.. that theory goes out the window, for the simple fact that they are no longer moving (up&down that is) parallel to each other.
To combat this you can do what streetracers do.. add superstiff antirollbars with solid springs so that the car has no body roll at all.. that gives you zero bumpsteer with the free addition of zero grip.
Or you can edit the rollcenter of the front axle (moving the inner wishbone mountings upwards, or the outer lower - do the same with the steering!) and mount a softer ARB.
since the car has a higher R/C, it will take more force to roll the body, hence the softer ARB, equals more grip!
( i plan to run my E36 with no ARB's.. but that has polyester bodypanels)

but that is a tad extreme for a daily car..

If you can get your car on a lift for a couple of hours, measure (height from floor/asphalt and distance from the center of your car.) the 'rotation points' of your front suspension, write them down and go figure out what happens...do this in 2 different set ups, one at full droop and one at static ride height.. then you have an idea what will happen with your car.

so.. that's your racecar 101

I know it's an M3.. but it does look sexy!

Time to rebuild her!

I've added the gold tape save the rest of the car a bit from radiation heat.. or so i hope ... applying 10mtr took over 1,5hours ...


The car will remain white, with some orange parts (front lip, mirrors, wing endplates and door sills)


First thing i did after receiving the car was mounting the taillights.. makes it so more finished.. never mind that i still need to build everything else
Oh and i love the STW rear wing

The car is being painted in racing white now



Next week I can build her up again!