DIY First gear or speed output?

Wdbi

New Member
Sep 10, 2019
7
6
0
Ride
ST e92
I have a JB4 with a mhd backend flash and i was wondering if there was an output I can use to trigger a device. I need the device to only be activated in first gear or below a certain speed.
 

doublespaces

Administrator
Oct 18, 2016
9,303
4,331
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AZ
Ride
2009 E93 335i
With creative use, you could possibly use the exhaust flapper but it would require custom logic in the DME most likely.