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str8shot str8shot is offline
Junior Member
Posts: 328
Join Date: Oct 2012
Car: N54 135i
Default 07-29-2015, 08:12 AM

Originally Posted by Spxxx
Can we get more technical info in this thread vs. in the FS thread?
Sure, what kind of technical info were you looking for? The ECA components themselves?

I'm using an Amtel ATmega328 processor, along with a CSR bluetooth radio. The bluetooth radio has a working range of about 30 feet, but that's slightly reduced since it's under the hood. I'm converting one of the 328's PWM outputs with a lowpass filter to a true 0-5v analog signal.

0-5v analog out ensures backwards and forwards compatibility with just about every flavor DME/piggyback/gauge there is.

The harness I made is from 18 awg premium Granger interlink wire, premium .125 loom, and premium adhesive lined heat shrink bullet connectors. The loom is heat wrapped shut about every 2 feet (vs using zip ties) for a OEM like finish.

The next batch I'll be switching to 22 awg wire, as the 18 awg is just a little too big and tends to pop out of the looming. Both work perfectly, though.

The connectors are OEM GT150 style, and I solder the pins (vs just crimping) for a fail proof design. I'm also using delphi weather seals on the pins so they're weather proof.

2008 Montego Blue 135i Coupe // Sport Package // JB4 G5 Iso in passive mode with custom e30 MHD tune // Bluetooth e85 content analyzer with JB4 integration // Walboro 255 inline pump // BMS downp|pes // VRSF 7" FMIC // ER charge pipe // Turbosmart BOV // Injen intake // M-Factory SMFW // F10 550i clutch // Vorshlag camber plates // Hotchkis FSB // Turner adjustable drop links // AST 5100 coilovers // Hawk HPS pads // Ti backing plates // Stoptech stainless lines // Turner 15mm front spacers