MegaSquirt Flyback Board -  UnAssembled Kit Part # MSFlyback-K     

The Flyback Board installs in the up half of the MegaSquirt case. It slides into the lowest slot, and is attached to a substantial heat sink (that you make yourself from ½"x¾" aluminum angle) OR as I recommend, it uses the top half of the MegaSquirt case as the heatsink. Six 20 to 22 gauge wires (two injector banks, two CPU [X0, X1], +12 volts, and ground) connect the Flyback Board to MegaSquirt.

Assembly

The Flyback board assembly instructions can be found here.  However this link will direct you to manually build a heatsink out of angle aluminum.  While this works great it is a bit of a pain in the tail.  Several people have found that by trimming the PCB down (Dremel tool works great, hack saw will surely work too) and mounting it a bit differently you can greatly simplify this process by using the case lid itself as the heatsink.  Several people are running with this configuration with no negative results reported.  Here is a picture of the final product installed in the case.

Install the transistors as seen above and wait to drill the holes until last, install the board as seen above and mark where the holes should be, drill them, screw them in, and move on!  (Still use the Mica Insulators where directed)

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