Hydraulic brake booster.

[Rocla]

Has anyone experience of using e28/e34/e32 etc. hydraulic brake booster on e30?

Pros:

Lighter pedal feel.

Conns:

Heavier
More complex
Expensive
Maybe it draws some hp's all the time, since it add the drag to PS pump?

Add your on the list.

I got e28 unit realy chep, and I'm considering if I should install it to my 318i.

[Ety]

I can't say anything about it in an E30 but before you put it in do this: http://aaron.aussiefiverdriver.com/h...ain%20seal.htm

My E28 was emptying its PS fluid completely about every 2 days once it got cold out.

[Ray Smoodiver]

Ian Haynes basically pioneered this setup. His is the template to follow if you wanna do it right

[Rocla]

I can't say anything about it in an E30 but before you put it in do this: http://aaron.aussiefiverdriver.com/h...ain%20seal.htm

My E28 was emptying its PS fluid completely about every 2 days once it got cold out.

Thanks, I sure will do that if I go with hydro booster.

BTW: models sold to cold climate use ATF instead on CHF on PS.

Ian Haynes basically pioneered this setup. His is the template to follow if you wanna do it right

Link anyone? I'm not a google person myself and search came with no results.

[Massive Lee]

I do not want to rain on your parade, but why would you do that? The system is more complex, requires more maintenance, and doesn't allow as much brake modulation because of the over-assist.

The only "raison d'être" of this swap would be if you installed a Euro S50B30 or S50B32 and need to clear the intake plenum. Obviously it is feasable. But is it adding anything?

[Rocla]

I do not want to rain on your parade, but why would you do that? The system is more complex, requires more maintenance, and doesn't allow as much brake modulation because of the over-assist.

The only "raison d'être" of this swap would be if you installed a Euro S50B30 or S50B32 and need to clear the intake plenum. Obviously it is feasable. But is it adding anything?

I have no single reason to do the install, just thinking if it would be good or not, since I have all the parts.

[Massive Lee]

Hey Rocla. I am sure it would be very nice to try it and see how different it feels. As you mentionned initially, the pedal will be lighter from the over assist. Which is okay driving around town. Not so good for modulation for spirited driving. If you do go ahead, please show us some pictures of your install. We will all appreciate it. Thanks in advance.

[Rocla]

Hey Rocla. I am sure it would be very nice to try it and see how different it feels. As you mentionned initially, the pedal will be lighter from the over assist. Which is okay driving around town. Not so good for modulation for spirited driving. If you do go ahead, please show us some pictures of your install. We will all appreciate it. Thanks in advance.

My original idea was to alter the pivot point of the "brake rod"(sorry I don't know the real names for the parts) in pedal and use big MC to get minmal pedal travel and decent pedal effort.

As you said, hydro booster can usually be found on comfort oriented cars.

[Rocla]

Today I learned that the e28 booster itself is a direct bolt on to e30 firewall and pedal assembly.

[Massive Lee]

Today I learned that the e28 booster itself is a direct bolt on to e30 firewall and pedal assembly.

Yup. This swap has often been used in Europe when installing an s50B30/32 in an e30.

[ian332isport]

You really need to use the E23 7 series version of the booster. It's overall length is the same, but some of it's length is inside the car. This helps clearance between the end of the master cylinder and the intake boot.

Here's a comparison.



Ian.