Public Post Development

Jake@MHD

Major
Platinum Vendor
Nov 7, 2016
1,593
2,058
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Philly
MHD build and logic to adjust the 2.56 to 2.81 done and sent to Terry C. Hopefully he can test tonight.

Note: this won't stop the N54 DCT TCU software from flagging much higher (>10-15% difference, idk the cutoff) as clutch slippage, but it should allow people to flash the M3 TCU ZB and run any lower FD.

Terry's 2.81 is only ~9% different so no limp mode, this test will be good to see if the shifts are clean and rev matching lines up as expected.
 

doublespaces

Administrator
Oct 18, 2016
9,303
4,331
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AZ
Ride
2009 E93 335i
So, this won't work for 2.56 or it will? The difference from 3.15 to 2.56 would seem to exceed that threshold, or does it only matter when going up?
 

dyezak

Major
May 4, 2017
1,768
1,518
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Plano TX
Ride
335is
So, this won't work for 2.56 or it will? The difference from 3.15 to 2.56 would seem to exceed that threshold, or does it only matter when going up?

Going down isn't a problem. The clutches just slip and there isn't a limp mode thrown. This will work perfectly on an M3 flash running a 2.56 ratio.

Going up is a big problem. You can't run a 3.15 ratio on a 335is flash because you'll cause all kinds of issues. Go back to the thread about the problems with the flash and somewhere in page 25-30 I outline the difference and why going up in ratio is a nightmare.
 
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TireDeathRacing

Private
Feb 17, 2018
34
26
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Ride
2011 335IS
MHD build and logic to adjust the 2.56 to 2.81 done and sent to Terry C. Hopefully he can test tonight.

Note: this won't stop the N54 DCT TCU software from flagging much higher (>10-15% difference, idk the cutoff) as clutch slippage, but it should allow people to flash the M3 TCU ZB and run any lower FD.

Terry's 2.81 is only ~9% different so no limp mode, this test will be good to see if the shifts are clean and rev matching lines up as expected.

Figures this get finished and this happened yesterday. So sad :(
 

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boostE92d

Corporal
Jan 9, 2018
150
86
0
Houston TX
Ride
12 335is
MHD build and logic to adjust the 2.56 to 2.81 done and sent to Terry C. Hopefully he can test tonight.

Note: this won't stop the N54 DCT TCU software from flagging much higher (>10-15% difference, idk the cutoff) as clutch slippage, but it should allow people to flash the M3 TCU ZB and run any lower FD.

Terry's 2.81 is only ~9% different so no limp mode, this test will be good to see if the shifts are clean and rev matching lines up as expected.

Patiently waiting, you guys are my hero. Give me your PayPal and I'll buy you some beer. Sorry, I spent all my money on parts.
 

dyezak

Major
May 4, 2017
1,768
1,518
0
Plano TX
Ride
335is
@jyamona any last minute changes to the public posting concerning the wording with MHD development? I think it's ambiguous enough to let people know that MHD is looking into this but there's nothing definitive that has been determined.