Rear axle grip

[Wemar_e30]

Hello,

i have BMW E30 with S50 engine, i built the car for drift, and i put on drift version D2 coilovers . I think i dont have enough grip on rear axle. Does anybody have the same problem? I drive 205/40 and 215/40r17 tyres. I think if i put larger tyres it will be a little bit better, but i think, i need to modificate suspension, but i dont know what to change, dones anybody have some pice of advice? I did chamber/toe modification and i set chamber and toe to 0º.

Greetings from slovenia

[Motorhole]

0 degrees camber on the rear doesn't sound right for a track car - won't have much of a contact patch when accelerating at full power. Would have thought -1.5 to -2 degrees would be a better starting point

[MillRat]

Agreed, that more rear camber maybe helpful.

Another question is what tyres and tyre pressures are you running. I helped a mate get his lap times down by some 10 seconds at a track day once by simply playing around with his tyre pressures. Also, 17" tyres sound large for a non-M3 E30 for the track. It maybe that the larger rim/tyres are messing with the suspension geometry a bit and causing you some grief.

Another suggestion would be to disconnect the rear anti-sway bar (easily done between track sessions). This will allow for more weight transfer and help to load up the driving tyres a bit. It may make the rear end a little sluggish when flicking left and right, but that shouldn't be too much of a problem for a drift car.

Lastly, are your coilovers rebound adjustable? If so a lower damper setting maybe helpful. If not, then a slightly higher ride height may offer a more compliant rear end.

[MillRat]

P.s. the "hashed" out word above is flick ing...

I'm not sure how that violates any language rules unless vulgarism has moved on without me keeping up..

[DanThe]

P.s. the "hashed" out word above is flick ing...

I'm not sure how that violates any language rules unless vulgarism has moved on without me keeping up..

I expect its censored because vulgarism may move on

[rix313]

What tyres are you actually using? Using a softer compound will help. What is it you want the grip for? A drift car will have a different setup to a track car owing to the fact the disaplines are different?

[Karan]

0 camber will give most grip for drifting. In fact you could even run slightly positive so when you accelerate and the car squats the wheels tuck in at the top a touch. I've seen a lot of the top end drift cars run positive rear camber

[Motorhole]

Are we all on the same page here as to what constitutes positive and negative camber? Sounds like you're talking about negative camber, Karan

[redcar]

Are we all on the same page here as to what constitutes positive and negative camber? Sounds like you're talking about negative camber, Karan

nope. Positive camber, it's true!

[Mikey_Boy]

These crazy drifters....

[Demlotcrew]

Are we all on the same page here as to what constitutes positive and negative camber? Sounds like you're talking about negative camber, Karan

The Irony is that you need good grip to drift at speed!

I need to look in to this a little more as the semi trailing arm has its own quirks!

Andrew

[randomspeedfreak]

as the rear squats it toes out and increases negative camber. if at rest you are at 0 it will increase with suspension travel.

try a little toe in on the rear...although i dont know much about drifting it could be worth a punt

[Wemar_e30]

Hello,

im sorry for my late reply. Im using 215/40r17 or 205/40r17 tyres at 1.8 or 2.0 pressure depends which tyres im using. The car is for drift use only and i compare my car (E30 S50B30) and friends e36 m3 (S50B30). When we drag race my car i a lot faster, but when drift in corners he is faster, i know i use smaller tyres, but i think i would be faster. I think my car si lightweight and setup of coilovers is wrong, now im looking for correct spring ratio, i think if i put 6kg/mm will be better, but im not sure. I put the rear chamber to 0 and toe +1.

So i ask here, might somebody have same problems:)