Things from M3 I've adopted to my E30..
Front caster with M3 eccentric bushes. Moves the wheel 2,5cm forward, adding a lot of caster angle and therefor dynamic camber.
Moving the front tyre forward affect the weight distribution also, by 1%ish.
Sway bar links in front similar to M3. Sway bar "response" remains about linear throughout range of wheel travel. Also when you have steering angle, correctly placed drop link points "pull" the sway bar to a preload, ie. it "works more" the more steering angle you have.
Modified wind screen opening for a bonded glass, adds shell stiffness.
4 pot engine for weight distribution 8)
Close ratio box, less rev drop when upshifting. Also the M3 trans mount is 4 point so it adds a bit of stiffess to the pro shaft tunnel.
Throttle bodies and plenum for even mixture and filling.
The washers that reside above E30 rear subframe bushes, can be pressed into a cup shape mimicking M3 type washers, thus they allow less rear beam vertical movement for better wheel angle and roll center control. I myself have shore 95A bushes but I've done that mod to other cars.
Front caster with M3 eccentric bushes. Moves the wheel 2,5cm forward, adding a lot of caster angle and therefor dynamic camber.
Moving the front tyre forward affect the weight distribution also, by 1%ish.
Sway bar links in front similar to M3. Sway bar "response" remains about linear throughout range of wheel travel. Also when you have steering angle, correctly placed drop link points "pull" the sway bar to a preload, ie. it "works more" the more steering angle you have.
Modified wind screen opening for a bonded glass, adds shell stiffness.
4 pot engine for weight distribution 8)
Close ratio box, less rev drop when upshifting. Also the M3 trans mount is 4 point so it adds a bit of stiffess to the pro shaft tunnel.
Throttle bodies and plenum for even mixture and filling.
The washers that reside above E30 rear subframe bushes, can be pressed into a cup shape mimicking M3 type washers, thus they allow less rear beam vertical movement for better wheel angle and roll center control. I myself have shore 95A bushes but I've done that mod to other cars.
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