Magnum and Wiring Swap

tcanin00 said

I would like to find an M1 that isn't made of unobtainium. Guys want a fortune for them whenever they come up for sale. I read an intake comparison between a stock kegger, ported kegger, Hughes dual plane, and an M1. The M1 was the highest performer with the best flow numbers. The Hughes was marginally better than a ported kegger. My car and set up seems to run pretty good with the Hughes, so I'll leave it on for now.
The IAC is clean and I can hear the air bypass since I'm running an open element filter. I haven't actually put it in a test mode and cycled it to confirm.
Thanks for posting the link to the 1994 FSM. I'll go through it and see how different it is compared to the 1995. The 1995 makes more references to OBD II and shows relays for the low beams and parking lights, both things that were not in my harness.

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Yeah, people want stupid money for those intakes, I got lucky and found my M1 relatively cheap ($750 CAD). I'm surprised the Hughes wasn't better, I have only heard good things about them. But I would say unless you can find an OBD1 Mopar Performance PCM or upgrade to OBD2 and get a custom tune, the M1 isn't really too great. The problem is the 5200 rpm rev limiter on the stock tune.

My experience with the M1 is like this.... it's slightly worse than the kegger below 3000 rpm, about the same from 3000 - 4000, and way better above 4000 rpm. The kegger is pretty much out of breath by 5000 rpm, so you might as well shift. But with the M1 (plus a 53 mm throttle body, plus a cam, plus long tube headers, etc) the engine wants to rip right past 5200 rpm, so the stock PCM isn't ideal. I do have a Mopar Performance PCM for 1994 / 1995 trucks, and it works well.