actually the FC cooler is almost twice as thick as either/both FD/rx8 cores, and it is also wider then both put together.

It is completely normal to have a slight power drain when using one or more high amerage functions in your car at once...such as windows, sunroof, or brake lights. Even with my big 275A in the truck I can still observe this.

The same thing happens in your house when you have lights on inside and the a/c or heater kicks on...everything dims for a split second due to the huge demand introduced onto the system, before it recovers.

 

Ahh pic's don't do it justice then.

Odd, I never seen this before. Or I might have not payed any attention.
Thanks.