E21 Boosters and pedal feel

[jrdeamicis]

So after my Ix booster aborted it self into 2. I decided to try the E21 Booster. I put a stock e30 MC in currently to have a baseline on pedal feel. Pretty soft but the brakes are grabby. Has anyone tried controlling the amount of Vacuum the booster sees?

I just ordered a 750il MC that I am going to be putting in today and review the pedal feel with the larger MC and same booster.

[z31maniac]

I have a stock NEW E30 MC + THR booster + Massive Street kit, the pedal feel is awesome. Nice initial bite but plenty of room for modulation.

Definitely not soft, but not rock hard either. Just the way its supposed to be IMHO. My booster also does not have the little check valve either.

[jrdeamicis]

I have a stock NEW E30 MC + THR booster + Massive Street kit, the pedal feel is awesome. Nice initial bite but plenty of room for modulation.

Definitely not soft, but not rock hard either. Just the way its supposed to be IMHO. My booster also does not have the little check valve either.

I am on E36 M3 Brakes, used MC (which I think is sticking) and a refurbed E21 booster. I feel its a little too much travel. It bites faster then I would expect with the pedal feel it has though. My MC will be here in 40 minutes. The e21 booster was meant for what? A 1.8 4 banger? I have a feeling the new MC might make it perfect.

I was driving the beast and all of the sudden I felt the brakes starting to drag. They didn't drag on my last setup. So I will replace this stupid MC and go from there.

[jrdeamicis]

Well the new MC is a lot nicer IMO. Its a bit to get used to but its nice for the brakes. And HOLY FUCK does my car stop with the new master, booster, and E36 M3 Brakes. My old m3 these brakes came from wish they could stop this well.

[rThor432]

My old m3 these brakes came from wish they could stop this well.

That good eh? I've been enjoying my M3's brakes while the E30 is down for the 5-lug conversion. I cant wait..

[jrdeamicis]

Well its not a fair comparison.

E30 weighs a lot less. Running the same falken rt615 235/40/17 thats a lot of tire with a lot less weight.

But I am having a problem getting the tires warmed up. lol

[e30polak]

I hated the brake feel with the e31 booster before I put in a vacuum reserve canister. On my first drive after finishing the swap, I had almost no brake assist, it was quite scary! After the canister install, the brakes grab nicely. :D

[surebimmer]

What happened to the IX booster? I have a e21 320i booster in my 89 with the 25mm MC pedal feel is good. But i also have the IX booster with the 25mm MC in my M3 and pedal feel is a lot better.

[jrdeamicis]

What happened to the IX booster? I have a e21 320i booster in my 89 with the 25mm MC pedal feel is good. But i also have the IX booster with the 25mm MC in my M3 and pedal feel is a lot better.

It sploded :)

[Nick325is]

I've got an e21 booster and an e45 m5 master cylinder. I just pressure bled the brakes and the pedal is solid. I've got very little travel and the car stops very well.

[MattM]

holy, how did the booster burst like that? should i be worried about mine?

[e30s50dan]

yea.my first IX booster exploded also,just came apart where they are poorly crimped together..Just got another one from TURK (thanks dude) and using an E34 MC..Brakes are good,not great ....still bleeding!!!