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      04-05-2024, 01:48 PM   #1
opposer
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325ci e46 - Brake pedal to the floor after spinning

Hi.
I tried to drift my e46 (it has a locking diff and a manual)

After being spun, the brake pedal becomes absolutely soft - falls to the floor and the car doesn't brake. If you press it one more time - it becomes firm again like always.

I disabled totally the DSC (holding DSC button for 5secs).

What can be the problem? Maybe I should take out the ABS fuse before drift training?

The brake fluid is fresh and level is ok.
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      04-05-2024, 02:04 PM   #2
tracer bullet
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I like the line of electronic thinking, but - is there a chance your brake fluid level is low and you momentarily slosh the fluid up to the side and let some air in? I wouldn't think it'd suddenly purge back out right afterwards so probably not, but - maybe check the level?
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      04-05-2024, 11:06 PM   #3
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Could be pad knock back.
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      04-06-2024, 03:05 PM   #4
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I agree. It sounds like the brake piston(s) are getting pulled back off of the pads and into the caliper while drifting. Getting the pedal back after pumping/bumping the brake pedal once and then works properly again. There’s not much you can do with stock calipers. The usual solution is to install 6 lbf/in anti-knock-back springs behind each piston.
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