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David David is offline
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Join Date: Apr 2002
Location: Houston (Clearlake), TX
Posts: 8,693
I started by removing the stock engine harness and building a new one without all the CIS crap. Here's a drawing of the stock 78 and my new harness. There's (at least) one error, I believe it's pin 12 that's supposed to be black/purple for the tach signal. I bought a new 14 pin connector and pins plus all the other connectors to build the brand new harness.

With all the sensors, injectors, etc installed on the engine, I laid out the EFI harness and built it.

I used Deutch DTM connectors with gold pins where possible. They're a bit more expensive and require use of a $300 crimper, but I think it's worth it (especially if you can borrow the crimper like I did ). I bought an unterminated harness for the Motec ECU which had Tefzel wires and sheilded wires for the sensors. Tefzel's the best but it's also high dollar. I used cheap shrink tubing rather than Raychem and I hope I don't reqret it.

Send me your email and I'll send you some info on the '77

Here's the finished engine harness:

2014 Cayman S
2011 Cayenne Turbo
1979 930 (475 rwhp at 0.95 bar)
Old 07-04-2007, 09:53 AM
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