| ichiwan2 |
Posted
Monday, Apr 25th 4:53pm [Edit] [Quote] [IMS] [View car] |
Member
Post nr. 123
Kuala Lumpur, Malaysia
BMW320/6(e21) |
Hi All,
Just changed my brake booster/servo with one from an e28.
Modification required:
1. Mounting bracket on servo needs to be shortened. From about 2.5
inches to about 1.25 inches.
2. Knocking of the tyre-well to accommodate the larger servo.
3. Re-use original e21 brake master pump. (e28 master pump has two
outlets only, vs 3 with the e21 brake master pump)
4. Shorten the joint with the brake levers (i.e., connection between
servo and the brake levers (just behind the headlights.
Braking is now much more progressive. Shorter stopping distance and
feels less likely to lock up Don't have to press the brake pedal as
hard as I had to previously.
Next step, my Volvo 4-pot calipers.
Has anyone done this before?
Photos will follow later.
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| RDAvena |
Posted
Monday, Apr 25th 5:35pm [Edit] [Quote] [IMS] [View car] |
Staff
Post nr. 1248
SELECT * FROM users WHERE clue > 0
1981 323i, 1988 545is, 1997 528i |
If you were upgrading to the Girling calipers you should have waited and used the e12 master cylinder.
You may be asking for trouble by using a two circuit master cylinder instead of the a stock three circuit. Not sure on the car you removed it from but most e28s were fitted with an ABS pump along with this two circuit master cylinder. |
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| ichiwan2 |
Posted
Monday, Apr 25th 6:45pm [Edit] [Quote] [IMS] [View car] |
Member
Post nr. 124
Kuala Lumpur, Malaysia
BMW320/6(e21) |
I am using the three circuit master pump from the e21. Fits the e28 booster. The booster was from a 1982 525i. It did not have ABS.
The e28 is now using a booster from an e32. |
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| bmw_m_320i |
Posted
Monday, Apr 25th 9:12pm [Edit] [Quote] [IMS] [View car] |
Member
Post nr. 231
Helena, Montana
none right now :( |
despite what people say, I still like the idea of having a Hydra-boost system off of like the 535i's |
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| RDAvena |
Posted
Monday, Apr 25th 9:27pm [Edit] [Quote] [IMS] [View car] |
Staff
Post nr. 1252
SELECT * FROM users WHERE clue > 0
1981 323i, 1988 545is, 1997 528i |
it has its advantages. Just a bitch to remove "the bomb" when it goes. |
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| bmw_m_320i |
Posted
Monday, Apr 25th 9:38pm [Edit] [Quote] [IMS] [View car] |
Member
Post nr. 232
Helena, Montana
none right now :( |
I havent actually seen alot of them that have gone bad. Usually when one goes, its because the wrong fluid was in the system, or someome over filled it because they didnt know you have to pump it up until the level stops rising with the car off |
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| nsbone |
Posted
Wednesday, Apr 27th 12:27pm [Edit] [Quote] [IMS] [View car] |
Member
Post nr. 297
KL, Malaysia
e21 323/6 316, e34 520i, e32 730i |
| bmw_m_320i wrote: | | I havent actually seen alot of them that have gone bad. Usually when one goes, its because the wrong fluid was in the system, or someome over filled it because they didnt know you have to pump it up until the level stops rising with the car off |
My e32 has hydraulic leak between servo and master pump. The later e32 is fitted with vacuum type which can be retrofitted.
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| ichiwan2 |
Posted
Sunday, May 1st 7:27pm [Edit] [Quote] [IMS] [View car] |
Member
Post nr. 126
Kuala Lumpur, Malaysia
BMW320/6(e21) |
Closeup of bracket - cut from about 2.5 inches to about 1 inch
Tyre well from inside engine bay. Darker colour indicates extent of reshaping.
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| ichiwan2 |
Posted
Sunday, May 1st 7:32pm [Edit] [Quote] [IMS] [View car] |
Member
Post nr. 127
Kuala Lumpur, Malaysia
BMW320/6(e21) |
Next stage - Girling calipers
Before painting, clean and original condition (NOS)
Painted
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