brake booster delete...need help...

[gooseadrian]

i need to know the pros and cons of deleteing a brake booster.

thanks r3v

[TurboJake]

Pro's:
More brake pedal feedback

Con's:
More foot/leg pressure needed

Notable situations where it won't be a good thing:
Panic braking

[Jaxx_]

less weight

no pedal difference between on and off the throttle. Good for racing situations where you might be at WOT but don't want to lift for a corner for example.

[Pantless Spency]

sounds like a bad idea to me.... hahha

[MR 325]

If you have to ask, it's not for you.

[AndrewBird]

Running a master cylinder that was designed to be used with a booster without one is a bad idea, however, running one that was never designed to have a booster in the first place is fine. That being said, I don't think any e30 ever came without a booster.

[gooseadrian]

thanks guys just curious. i was just wondering cause i see a lot of people do it on the project forum.

happy new years. dont drink and drive!!!

[fporro]

how about relocating it, like on some 5 and 7 series.
can be retrofited

[george graves]

A.) Drive to an empty parking lot
B.) undo the vacuum line to the booster
C.) Pump the brake pedal a dozen times
D.) Now drive around

You'll crap yourself at how crappy your brakes will be. You'll just about break your seat back trying to come to a stop.

[!kid]

A.) Drive to an empty parking lot
B.) undo the vacuum line to the booster
C.) Pump the brake pedal a dozen times
D.) Now drive around

You'll crap yourself at how crappy your brakes will be. You'll just about break your seat back trying to come to a stop.

That's using the stock pedal ratio. If someone is going going to do a manual brake swap they will be changing the pedal ratio as well as possibly the the master cylinder it self To one of a different size. Your comparing apples to oranges.

[acolella76]

less weight

no pedal difference between on and off the throttle. Good for racing situations where you might be at WOT but don't want to lift for a corner for example.

:rofl:

[TobyB]

The ability to threshold brake effectively would be a benefit.
As would your new huge right leg.

You might break your seat mounts, though...

If you're not up for redesigning brake systems, I wouldn't do it...

t

[Jaxx_]

The ability to threshold brake effectively would be a benefit.

you can't threshold brake effectively with a brake booster? news to me.

:rofl:

unsure what's funny, honestly.

[TobyB]

you can't threshold brake effectively with a brake booster? news to me.

Nope, the lag inherent in the BMW booster system (and probably all boosters, but 2002's and E30's are my data points)
means that once you get enough brake on to lock a caliper, you have to lift significantly
to get it to unlock. Then you have to modulate back on to get brake force back up,
and that's hard to do quickly through the booster without locking again.

Took the booster off the 2002 race car and it was probably the best thing I ever did for
the car.

The increased pedal pressure probably helped, too (different masters, balance bar, etc)
but the ability to leave a black mark 6" long instead of 10 feet was enlightening...

and the Pro3 cars I've driven behave about the same way.
They were boostered....

That's been my experience, anywhich.

t