E46 M3 Base vs ZCP Conundrum

[simon_c]

Wow that reupholstered M-texture interior looks amazing. Mind sharing what something like that costs? Looks like you built the car that you wanted

[adr_M3]

Wow that reupholstered M-texture interior looks amazing. Mind sharing what something like that costs? Looks like you built the car that you wanted

It ended up being north of $11K as many of the existing parts weren't able to reused given the entire interior was in grey. I ended up getting a new headliner and OEM A-pillars to correct errors made by another upholstery shop, who used the wrong material as well as crazy glue in their install 🙄


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[simon_c]

It ended up being north of $11K as many of the existing parts weren't able to reused given the entire interior was in grey. I ended up getting a new headliner and OEM A-pillars to correct errors made by another upholstery shop, who used the wrong material as well as crazy glue in their install 🙄


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my dreams are now shattered lol.

[davidinnyc]

Wow that reupholstered M-texture interior looks amazing. Mind sharing what something like that costs? Looks like you built the car that you wanted

Can confirm, have seen this interior in person. I was jealous.

[adr_M3]

my dreams are now shattered lol.

If you already have a black interior, you could get your seats and door cards reupholstered with the M-texture fabric at a more reasonable price point:

https://www.ascfabrics.com/product-page/mtexture

My refresh was costly due to the fact that the seats, carpet, and door cards all had be to replaced given the plastic bits were all grey and couldn't readily be refinished.

[old///MFanatic]

Sorry if this is a stupid question, what are the main differences between base and ZCP steering column?

The ZCP got the steering rack from the CSL. It’s a tighter ratio of 14.5:1 vs.15.4:1. So it’s a sportier less full turns lock-to-lock. But also not as boosted, the internal spring valve isn’t as soft. So again, sportier. This is the one BMW M used in the CSL so it’s a performance feel and reaction. But nothing obnoxious by any means. *I see you added a ZF “yellow tag .712” 14.5:1 ratio rack so you now have the same “ratio”.

Since you have the early MK20 you’ll want to swap in a MK60 to code for the 14.5 rack. Otherwise you’ll find it triggering DSC in quicker turns early. With MK60 you’ll then be able to also code for “M-Track Mode”. That allows you to have some ~20% more slip of the DSC before it intervenes. M-Track is a steering wheel control on ZCPs. Non-ZCPs use the DSC button on first push to activate. And a second hold of button to turn DSC off like it usually functions.

If you were to later decide to add the CSL brakes that are larger fronts (cross-drilled floating aluminum hats) and larger rear caliper piston. The MK60 again has a very easy check box to click to code for the different CSL/ZCP brake bias also.