E28 hydraulic brake booster into E30

[Mr. Horsepower]

Anyone here that have done that conversion and have some pictures and info about it?

[Massive Lee]

Get the booster from the e23 as it fits one inch inside the cockpit.

Google is your friend. Tons of info out there.

Lee

[Mr. Horsepower]

Have been Googling for some time now, and not finding anything..

What is the difference of the E23 and E28?

[Mr. Horsepower]

Overall length is the same, but some of the length is in the car.

[Massive Lee]

^^^Correct. 25mm goes into the cockpit. More clearance in the engine bay. The hydraulic booster offers a lot of assist. Brakes will become sensitive. Better fit a large 25.4mm MC, don't even try with a smallish 21mm.

[Mr. Horsepower]

IMO, better with sensitive than way to hard. Makes you think you have crap brakes.
I'm also fitting the bigger E36M3 calipers.

I'm thinking of using Audi 80 25mm master, that will be better than 21mm?
Audi 80 one is much shorter, giving even more room for CF box.

[Massive Lee]

e32 750iL 25.4mm with twin 8mm outlets. e30 M3 has 10mm and 8mm outlets.

Stock size for e36 M3 calipers is 23,8mm

[Mr. Horsepower]

What is the reason for using particular the E32 750iL one?
Audi 80 is 25mm as well, and shorter in length.

[Massive Lee]

What is the reason for using particular the E32 750iL one?
Audi 80 is 25mm as well, and shorter in length.

Does it fit? If so, go for it.

[Massive Lee]

Is that the Audi 80 MC?

[Mr. Horsepower]

Yes, but with only two outputs. HybridNz have used it on his project, along with Golf MK1 booster. I have Golf MK1 booster and E30 master, which tells that the Audi one fits on E30 and opposite.

[E30Eric]

Did you save a lot of space with the MK1 booster?

I'm working on an LS6 swap and I have the 750iL MC and e30 booster in there now, but I will have to come up with a space saving solution for the booster. So far it's looking like the Metro booster(shoot me in the face) or the E28 hydraulic setup...

[Mr. Horsepower]

Compared to the E30 one, yes a LOT. The Golf MK1 booster is 7" diameter.
For V8 swap I would go for E34 530/540 brake setup.

[Massive Lee]

So far it's looking like the Metro booster(shoot me in the face) or the E28 hydraulic setup...

Metro booster is a piece of shiite (pun intended). No assist at all. Get the e23 hydro booster.

[Mr. Horsepower]

Received the E28 booster setup before the weekend.
I bought it since it was complete with all the tubing, ball and split block, but the length of the booster part is much longer than the Golf MK1 booster.

I think I measured a length of 15cm from firewall to where master cyl is fitted. So, I will probably try to source a E23 booster to go with the Audi 80 master cylinder. Then I may be get the same total length that I have now with the Golf MK1 booster and E30 23mm master cylinder.