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Reply to "Maui garage find Intermeccanica rebuild"

Hi everyone, I thought I'd post a short build update. Winter has arrived in Maui. It didn't get above 74* F today and the wind was gusting up to 30 mph.  I know, get out the tiny violins, but my blood has definitely thinned since we moved from Rhode Island.

I've been sorting out the wiring harness (Henry had built a new one for the previous owner) and modifying it to accommodate the additional gauges, AC controls, swapping the speedo and the combo positions and moving the wiper controls. My granddaughter was a great help during this stage :-) Now let's see was it the red wire or the blue wire that I need to cut...


The engine will need electronic ignition to free up the distributor space for the AC compressor. The speeduino ECU will provide the brains and configuration controls. I've done several boosted Megasquirt ECU installations and decided to go with a lower cost unit. Everything I've read suggests that it should be fine for ignition and be capable of fuel injection/boost control if I ever decide that it's needed (unlikely). I splurged and bought a fully constructed system rather than a kit. I cheaped out on the crank trigger wheel (modified a stock Mustang wheel), the crank sensor (China built Saab 9-3) and the coil pack (China built VW Golf pack with integrated igniters). The total for  the conversion should be under $300. If anyone is interested in details, let me know.


Speeduino ECU. This mounts on top of a MEGA 2560 Arduino CPU


Mustang crankshaft position trigger wheel modified to fit behind the VW pulley

ac pulley

Front view with AC pulley installed

Finally, the top for the battery box has been built. It's made from 1/4" plywood reinforced with a couple of layers of fiberglass. A couple of fiberglass coated wood strips support the lid. I'll eventually paint the top and supports to match the trunk. The outcome is reminiscent of the smuggler's box in the older air cooled 911s. It hides the air conditioning evaporator and gives the trunk a flat floor.

smugglers box1

View into battery box modified to hold AC evaporator unit. Side bars support lid for boxsmugglers box2

Fiberglass reinforced lid that creates flat floor for trunk and protects AC. Some fiberglass patching can be seen on the right side where a previous fender bender created a stress crack. Lid will be painted to match trunk.

Coming up next will be fabricating supports for the shoulder harnesses. I've been researching the approaches used in the past and have about 50 lbs of steel and a welder to play with. My hope is to NOT put 50 lbs of steel behind the seat, but I didn't want to run out... More later,



Images (6)
  • wiring1
  • ac pulley
  • crankwheel
  • smugglers box1
  • smugglers box2
  • speeduino