Single circuit master brake cyl

[Hans]

Did I see mention of an early seven series cyl that might work with 2000 system?

Are E21 calipers similar to 2000 single circuit?

[HBChris]

Here is what I did on a 68 build date 2002.  Search part numbers to help you find what might work on an NK.

 

 

[Pastelblue'02]

On 8/24/2024 at 2:01 PM, Hans said:

Did I see mention of an early seven series cyl that might work with 2000 system?

Are E21 calipers similar to 2000 single circuit?

Hello! You’re probably talking about my NK. It’s a 68 2000 with early e23 front calipers. Just like a 2002tii, 2000 NK’s utilize a 3.5” caliper bolt spacing. Therefore, e21 calipers will not work (unless perhaps euro 323i calipers?)

 

e23 calipers are a direct bolt on, however vented rotors will be required unless you want to remove the factory spacer in the caliper. I used e9 vented rotors. Hope this helps!

 

Aaron

[Hans]

On 9/5/2024 at 5:51 PM, Pastelblue'02 said:

Hello! You’re probably talking about my NK. It’s a 68 2000 with early e23 front calipers. Just like a 2002tii, 2000 NK’s utilize a 3.5” caliper bolt spacing. Therefore, e21 calipers will not work (unless perhaps euro 323i calipers?)

 

e23 calipers are a direct bolt on, however vented rotors will be required unless you want to remove the factory spacer in the caliper. I used e9 vented rotors. Hope this helps!

 

Aaron

Thanks for info. Sorry for delay - I was away. What did you use for master?

[Pastelblue'02]

3 hours ago, Hans said:

Thanks for info. Sorry for delay - I was away. What did you use for master?

E21 single line master cylinder!

[Hans]

On 10/3/2024 at 1:39 AM, Pastelblue'02 said:

E21 single line master cylinder!

Does it have three outlets? Does sedan have the rear brake modulator?

[Hans]

On 8/24/2024 at 9:06 PM, HBChris said:

Here is what I did on a 68 build date 2002.  Search part numbers to help you find what might work on an NK.

 

Hi

I assume those are 2002 caliper bolt spacing (i.e. not tii)?

 

[Pastelblue'02]

13 minutes ago, Hans said:

Does it have three outlets? Does sedan have the rear brake modulator?

Yes, 3 outlets. I was able to utilize the rear brake proportioning valve using a custom brake line.

[Hans]

Smaller diameter than CS. Brakes work OK?

[Pastelblue'02]

18 minutes ago, Hans said:

Smaller diameter than CS. Brakes work OK?

Yes, the brakes are outstanding. Considering how much larger the pad is, and that the calipers are now 4 piston instead of 2, and the rotors are vented instead of solid. The car out brakes most any other car I’ve driven! Far better than any of my previous 02’s with factory brakes.

[Pastelblue'02]

23 minutes ago, Hans said:

Smaller diameter than CS. Brakes work OK?

I’m pretty sure the e21 master is the same diameter as the original master on my 2000. I’m not sure what a cs master cylinder looks like, but this is the factory 2000 sedan one.

 

e21 vs 2000 sedan

[Hans]

35 minutes ago, Pastelblue'02 said:

I’m pretty sure the e21 master is the same diameter as the original master on my 2000. I’m not sure what a cs master cylinder looks like, but this is the factory 2000 sedan one.

 

e21 vs 2000 sedan

Thanks for getting back. How many inlets do the E23 calipers have?

[Hans]

As far as I can see, E21 master is just over 20mm. CS single circuit (your last pic) is 23. 6mm or so.

[Pastelblue'02]

18 minutes ago, Hans said:

Thanks for getting back. How many inlets do the E23 calipers have?

Just a single inlet with 2 bleed screws. In order to use them with NK brake lines, a banjo adaptor is needed!

[Hans]

Don't E9 rotors have 5 holes? So many questions!