Carb Conversion

pcar9119 · 02-09-2009, 11:56 AM

I have a 79 SC and I'm doing a carb conversion. The CIS is off and I was just wondering if there is anything threads on here that can tell me what Wiring I need to keep and what I don't. I can probably chase it around myself, but if there is data on here, it would make it go alot quicker for me. I was wondering too, do I need to go to a MSD type ignition or can i use what I have already. By chasing wires it looks to me i should be able to keep what I have now, and it should work fine. Thanks, anymore info on this conversion would be greatly appreciated.

Steve@Rennsport · 02-09-2009, 12:21 PM

You can retain the stock ignition if you wish but carbureted cars run MUCH better with an MSD and matching coil.

Formerly Steve Wilkinson · 02-09-2009, 02:55 PM

You can eliminate virtually all of the stock wiring harness, almost all of which is devoted to the CIS and the ECU. there are a couple of sensor--pressure, temp--wires that will continue to feed instruments, but ultimately you'll end up with those and the starter/alternator wires.

RWebb · RWebb's Garage

ECU?? on an SC?

- there will be wires to some CIS components, but why bother getting rid of them? Lots of work and nil wt. savings.

RWebb · RWebb's Garage

ps - search on "msd" for many threads and pics of exactly how to install

Formerly Steve Wilkinson · 02-09-2009, 03:23 PM

Well, I generally, probably carelessly, refer to any computer box that controls engine functions, like the box under the passenger seat, as an "ECU"--engine control unit. I think most Porsche people call it the DME box? That's confusing to me as a pilot, since an aviation DME is an electronic box properly called distance-measuring equipment.