Obioban's 2005 IR/IR Coupe

[Obioban]

Sounds like we both looking for more track oriented setups 👍, thanks for quick response Yes I already have mk60 coded for Zhp rack, thought it be even less intrusive with 817.3 module, but having instant on off with dsc button back would be nice as well, it’s bit annoying holding the button for couple seconds to turn it off now, and having dedicated button for m-track mode, having less intrusive abs on track is big plus as well. Is it mostly plug and play plus coding? By mostly I mean you probably have to run wire for the S button stalk?


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It’s pretty plug and play, but 817.3 modules are hard to find. I searched for 2 years.

I did run a wire for the button. Otherwise, plug and play.

[Radekxpl]

You can code the stock MK60 for the ZCP or ZHP racks.

The 817.3 benefits for me are more track focused ABS behavior and separate buttons for M track mode and DSC off (which mostly means DSC can be turned off quickly enough that I can drift away from stop signs again). For people that race their cars (as opposed to track), the 817.3 module can also be flashed with BMW's motorsport software (eliminates DSC but gives you a full race ABS profile).... but I don't care about that.

I will be using the S button on my e39 washer stalk to turn on MTM now and the DSC button will once again be instant DSC off.

Sounds like we both looking for more track oriented setups 👍, thanks for quick response Yes I already have mk60 coded for Zhp rack, thought it be even less intrusive with 817.3 module, but having instant on off with dsc button back would be nice as well, it’s bit annoying holding the button for couple seconds to turn it off now, and having dedicated button for m-track mode, having less intrusive abs on track is big plus as well. Is it mostly plug and play plus coding? By mostly I mean you probably have to run wire for the S button stalk?


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[Obioban]

Hey, what are the main benefits of the 817.3 dsc unit ? I’m assuming it’s less intrusive with Zhp rack if that’s the case I’m interested in learning more about it if you don’t mind sharing. Thanks 🙏


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You can code the stock MK60 for the ZCP or ZHP racks.

The 817.3 benefits for me are more track focused ABS behavior and separate buttons for M track mode and DSC off (which mostly means DSC can be turned off quickly enough that I can drift away from stop signs again). For people that race their cars (as opposed to track), the 817.3 module can also be flashed with BMW's motorsport software (eliminates DSC but gives you a full race ABS profile).... but I don't care about that.

I will be using the S button on my e39 washer stalk to turn on MTM now and the DSC button will once again be instant DSC off.

[Radekxpl]

Finished up installing an 817.3 DSC unit in my coupe last night. Pretty excited for that!

Install was more of a PITA than I expected. I installed new DSC pressure sensors while I was in there, because I really don't feel like being in there again for a while :P

I also rebuild one of the 996 calipers, because I had pad failure at my last event of the seasons last year, and it melted the seals.

Hey, what are the main benefits of the 817.3 dsc unit ? I’m assuming it’s less intrusive with Zhp rack if that’s the case I’m interested in learning more about it if you don’t mind sharing. Thanks 🙏


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[Obioban]

Finished up installing an 817.3 DSC unit in my coupe last night. Pretty excited for that!

Install was more of a PITA than I expected. I installed new DSC pressure sensors while I was in there, because I really don't feel like being in there again for a while :P

I also rebuild one of the 996 calipers, because I had pad failure at my last event of the seasons last year, and it melted the seals.

[blazenXLT]

We did 6 months in an apartment while our house was finished, it was painful. 75% of our stuff was in storage along with 2 of 4 cars. All worth it for the new place though, hope your build goes easy (or at least as easy as a build can go)!

[Obioban]

Washer tank was leaking so I replaced it (no, it wasn't the seal-- tried that first).



Also stuck the M3 on quick jacks for winter project mode. No lift, as we sold our house and are living in an apartment while we build our new one.

While I was working, this showed up. I've never been more comparatively slower (Plaid vs on jack stands).

... truly absurd acceleration in that car.

[Slideways]

Lol, that's a fair point. Though the ST40 uses a standard D609 pad, I'm sure I could find you something. I can order StopTech stuff piecewise at work -- makes it tempting to see what I can put together.

993 Porsche Textar pads work with the ST40s with a bit of trimming to the pads. Stoptech has different calipers for different purposes - more track oriented anodized and painted for mainly street and light track use. Brembo paint quality on the Boxster S/996 calipers is about the same as the Stoptech calipers and any brake fluid not completely removed will ruin the finish on either. Turner MS used Stoptechs on their E92M race cars, so better than what they are made out to be.

[r4dr]

If you just refinish the calipers, use brembo seals, use brembo disks, and don't care about having a good street pad, the stoptechs can be okay

Lol, that's a fair point. Though the ST40 uses a standard D609 pad, I'm sure I could find you something. I can order StopTech stuff piecewise at work -- makes it tempting to see what I can put together.

[Obioban]

You can use Brembo and Girodisc rings with ST kits. You're right about ST rings not lasting.

If you just refinish the calipers, use brembo seals, use brembo disks, and don't care about having a good street pad, the stoptechs can be okay

[r4dr]

You can use Brembo and Girodisc rings with ST kits. You're right about ST rings not lasting.

Personally, the only part of the ST kit I would keep (other than the hat, since that's a pain to get made custom) is the Trophy caliper.

[Obioban]

Clear, thanks. Which kits are you referring to here? To that I mean, which ones do you have this experience with?

The rotor and pad selection are the same regardless of kit, but I have ST40s.

I also once tried stoptech rotors on the M3's Brembo BBK, because they're half the price... and they lasted ~1/4 as long as the Brembo rotors.

I don't know which 6 piston setup my friend had with the terrifying knockback, but it was bad enough that he sold them and replaced them with an AP Racing BBK.

[Albino09]

-There's no actually great street pad options-- just various levels of meh.
-The rotors last 1/2-1/4 as long as the brembo rotors
-the finish on the calipers fades and looks like crap quickly
-the 6 piston setups have scary levels of pad knock back.
-the seals go bad ~5x as fast as the brembo seals, resulting in the need for many more caliper rebuilds.

Clear, thanks. Which kits are you referring to here? To that I mean, which ones do you have this experience with?

[Obioban]

Can you elaborate on what you mean by that? Do they fade? Make a bunch of noise? Crappy feel? Stoptech offers many new "Grades" of kits (Trophy, Race, etc) so I'm curious where they are lacking.

-There's no actually great street pad options-- just various levels of meh.
-The rotors last 1/2-1/4 as long as the brembo rotors
-the finish on the calipers fades and looks like crap quickly
-the 6 piston setups have scary levels of pad knock back.
-the seals go bad ~5x as fast as the brembo seals, resulting in the need for many more caliper rebuilds.

[Albino09]

I have stoptechs on the m5, and they’re junk. IMO people that think they’re good have never had a good bbk to compare to.

Can you elaborate on what you mean by that? Do they fade? Make a bunch of noise? Crappy feel? Stoptech offers many new "Grades" of kits (Trophy, Race, etc) so I'm curious where they are lacking.