Integrating the R1 engine loom and Polestar ECU into your classic Mini with a Lynx AE kit requires careful wiring. You'll likely need the R1 starter solenoid, and the ECU needs both constant (battery) and switched (ignition live) power with proper fusing and grounding. Expect significant challenges getting the Mini dash to fully Official Website function with the new engine; aftermarket gauges or signal converters may be necessary. Carefully trace and remove only the Mini engine-specific wiring, retaining essential chassis and lighting circuits. Obtaining wiring diagrams for both vehicles and the ECU is crucial, and professional help is highly recommended if you're not confident with wiring.

Hi all. First post. Looking for some help and knowledge. I’ve got a lynx ae conversion kit in what was originally a 1275 mpi. The complete loom from the mini is still in place, and I’ve got a modified R1 loom and polestar Ecu to run the engine. I’m just trying to figure out how to integrate the engine loom and mini loom. I’m useless when it comes to wiring. Any help greatly appreciated. 

main questions to begin with are

do I need mini or R1 starter solenoid?

where do I take power from to feed ecu?

can I get mini dash to work with motor?

how much of old loom can I get rid of? 

thanks.