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Had my software done today, car definitely feel quicker, more torque, new rev limited is 7300rpm and automatically removed top speed limiter. Long story short, I took it out for a spin and put 80 hard miles, car feel smooth till I got home the JCW charger making some weird loud noise before I shut off the car, so I turned the back and shut it off again, still making weird noise before I shut it down. Does anyone know what kinda problem Im getting, is it the software or I drove it too hard? Should I bring it back to the dealership? Please give me some advice.
 

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If you can put the stock Software back on do it and see if the noise is still there.....which it should. Take it to BMW then. There is nothing that the software will do with the SC except for raising the rev limiter which make the SC spin higher. With the JCW it should be still under the limit of the SC.

Also....you might want to check the belt.

Alex
 
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