Originally posted by mrgizmo04
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Stoptech C43 front BBK
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Originally posted by SQ13 View PostI was able to get the information from ST. It’s 38/44mm. Just need to figure out what the bias would be with stock rears and 996 conversion rears. I hope I don’t screw up the 50 different calculations Build Journal has on their website lol.
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Originally posted by chapmans View Post
Please update with what you decide. I have C43 front kit on order and am trying to figure out what to do for the rears. The rear C43 kit won't work because I want to keep my parking brake.E46 M3 TiAg/Black - Journal, IG: sharkmar
981 Cayman GTS Racing Yellow/Black
C43 AMG Diamond Silver/Red
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Originally posted by chapmans View Post
Please update with what you decide. I have C43 front kit on order and am trying to figure out what to do for the rears. The rear C43 kit won't work because I want to keep my parking brake.
Not in a hurry to swap my OEM rear brakes. But it is on my to do list.
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Typically stoptech engineers their kits as front only with OE rears or front and rear. If you buy a front only kit you can’t typically just buy rears later on.
If you forsee wanting a rear kit later on just spend the money for the front and rear kit so the bias matches up correctly for the OE master cylinder.
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Originally posted by Jevi Javi View Post
is this confirmed? rear C43 kit does not support parking brake? I thought i had read somewhere that with the use of an adapter/spacer it could be used? maybe wishful thinking on my part...
Not in a hurry to swap my OEM rear brakes. But it is on my to do list.
The bimmerworld description specifically says it deletes the parking brake. I believe the rotor rear hat doesn't have the drum area for the parking brake shoes to contact.
I ended up ordering front/rear trophy instead. I'd still prefer the C43 if there actually is a work around for that parking brake.
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Originally posted by CrookedCommie View PostWill the PFC DD rear rotors fit the C43 kit? I was able to retain the parking brake and have enough pad clearance to disk hardware to run this rotor with the rear AP kit.'03.5 M3 SMG Coupe - Jet Black / Black
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Originally posted by r4dr View Post
Did you have to run a different pad than what Essex recommends to clear the hardware?
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Originally posted by Jevi Javi View Postso then 996 conversion for the rears. Anybody figured out the brake bias yet? If its not too far off. It should be ok. One could play around with the pads in order to compensate for this
https://drive.google.com/drive/folde...LudDTkQCWKsp-P
I’m leaning towards trying 996 rears with the narrower D738 pads and PFC DD rotors. To bring bias more towards the rear, something like Ferodo DS11.1 front pads (since PFC 08s aren’t available for the C43) and PFC 11 rears.
Edit: The C43 kit comes with DR21 pads, which are 43 mm wide, not the 50 mm wide DR98 pads that I used to calculate bias. Just learned this after calling StopTech.Last edited by SQ13; 01-07-2021, 12:37 PM.E46 M3 TiAg/Black - Journal, IG: sharkmar
981 Cayman GTS Racing Yellow/Black
C43 AMG Diamond Silver/Red
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Originally posted by CrookedCommie View PostWill the PFC DD rear rotors fit the C43 kit? I was able to retain the parking brake and have enough pad clearance to disk hardware to run this rotor with the rear AP kit.E46 M3 TiAg/Black - Journal, IG: sharkmar
981 Cayman GTS Racing Yellow/Black
C43 AMG Diamond Silver/Red
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At the last event I drove three E46M's back to back, all cars ran on similar Pirelli DH's
1. My stripper with AP front and rear using 1.11, MK20
2. WRL car with CP43 and stock rear using mix of 1.11 and DTC-60/70, MK60
3. Track setup but full weight with Stock front and rear and DTC-60, MK60
What we found with these setups in full-braking zones, the rear will lose grip and send the car sideways slightly. I'm thinking it has too much rear or not enough front?
On my car adding the rear AP kit seems to have helped - the sideways send is not as pronounced. I also measured the front rotor temps, and they are WAY too high for 1.11's. I'm switching to 3.12 front and keeping the rear at 1.11 and will test again. Unfortunately I only did a dozen laps last year in my car, and it'll be a while again this year before I can update. This is obviously not a scientific test, and in addition to all the differences, I had a brand new diff that was spewing fluid everywhere (hence the only dozen laps).
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When you say full braking zones, are you borderline triggering ABS at maximum threshold braking? What locks up first, front or rear?
I'm guessing rears based on the sideways feel you described? I'd imagine front lockup would just induce under steer and plow forward.Last edited by r4dr; 01-07-2021, 03:14 PM.'03.5 M3 SMG Coupe - Jet Black / Black
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Originally posted by SQ13 View Post
The C43 rear rotors are 324 mm. Kinda sad that they didn’t try using 328 mm rotors. Would give those looking for floating rotors for their stock or 996 calipers a good option.'03.5 M3 SMG Coupe - Jet Black / Black
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