M50 swap that will blow your mind.

[ZekeTheSneak]

Your stuffing that next to an s54 right? Looks promising. O'Reilly's sells a fitting that might solve the fitting issue.

Please don't bump my thread, the Audi booster was a total failure but the part I used for the brake lines is in there.

https://www.r3vlimited.com/board/showthread.php?t=275883

[Staszek]

Sweet! I'm looking forward to seeing the differences between the two. Thanks!

Here are pictures of both, the E90 booster is slightly smaller, hard to get a measurement exactly but its definitely slimmer at the bottom, but the E83 booster tapers to the same size as the E90 booster after the first few inches.

The cleeve basically lines up exactly the same between the two, but the E83 booster is about an inch longer than the E90 one, but the E83 master is shorter than the E90 so its total length is shorter.

I am thinking if the E90 works the E83 should work but it may be just a tiny bit tighter, if the engine is back further on the firewall.

Pros of the E83 is the lines are on the correct side and you will not have to extend them around, you will have to adapt the brake lines though since the input on the MC is larger than the E30s.

In the pics I have the E60 reservoir on the E83 master, it fits and sits flat, both the E83 and E90 reservoir are both angled since they go into their cars on an angle.

E90 on left


E90 Booster


E83 Booster thickest part


E83 after the first 4 inches


Im going to try the E83 one first, if that doesnt work go over to the E90.

[jwal]

M50 swap that will blow your mind.

prepping to install an X3 in mine soon

I have both and X3 booster and the E90. I’m going to compare the two. May go X3 route if it’s the same size or smaller do to the MC

Sweet! I'm looking forward to seeing the differences between the two. Thanks!

[Staszek]

Anyone look at the X3 booster? It has the lines on the same side as the stock E30 master cylinder.

I have both and X3 booster and the E90. I’m going to compare the two. May go X3 route if it’s the same size or smaller do to the MC

[eternal24k]

Anyone look at the X3 booster? It has the lines on the same side as the stock E30 master cylinder.

prepping to install an X3 in mine soon

[jwal]

The n52 swap that’s has its own thread has went that route.


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Oh sweet, I hadn't seen that. I'll have to check it out, thanks!

[The Dark Side of Will]

Great pics thanks for the update! One question, is there a negative effect from having a smaller reservoir?

Depends.
If you have a large piston volume in your BBK, and top off the reservoir when you have new pads, then you might drain the reservoir as your pads wear thin. If you're in this situation and top up the reservoir along the way, you'll overflow it when you push the pistons back to install new pads.

[E30335i]

Anyone look at the X3 booster? It has the lines on the same side as the stock E30 master cylinder.

The n52 swap that’s has its own thread has went that route.


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[jwal]

Anyone look at the X3 booster? It has the lines on the same side as the stock E30 master cylinder.

[razo-s.supra]

Functionality update

Took it for a short drive (no exhaust yet after headers). Stomped on my brakes a few times in isolated safe areas. This booster upgrade is the shit. Feels like a newer car. Yet I'm sure my old e30 booster has definitely seen better days. Thanks for the photo cred brotha and being adventurous enough to find this booster option!

[Noshow20x96]

BTW does any sensor cap fit? Like the E92 cap will fit the new smaller reservoir.

Yes. The stock e30 one works.


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[Staszek]

BTW does any sensor cap fit? Like the E92 cap will fit the new smaller reservoir.

[Staszek]

No but when you have a brake leak it will just run out of brake fluid faster lol


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Hopefully, with the new lines, I put in I won't have a leak lol!

[Noshow20x96]

Great pics thanks for the update! One question, is there a negative effect from having a smaller reservoir?

No but when you have a brake leak it will just run out of brake fluid faster lol


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[Noshow20x96]

Where is that smaller resevoir from?

I posted it up on the op

You can also get it for way cheaper on rmEuropean.com


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