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DMI and crank trigger #1029448 07/10/11 05:27 PM 07/10/11 05:27 PM
Joined: Apr 2007 Posts: 325 Greenville, WI B Big B OP enthusiast
Big B OP enthusiast B Joined: Apr 2007 Posts: 325 Greenville, WI	I have the DMI low mount alternator/cranks trigger set up with a 140amp Powermaster Alt. My problem is the motor breaks up really bad above 4500rpms. When I disconnect the belt it runs great. I shielded my pickup Wires with 3 layers of tin foil, but that doesn't help. My alt just died and I need to get a new one. Will a different alt work? I know someone had this same problem like 2 years ago. How did they fix it?

Re: DMI and crank trigger [Re: Big B] #1029449 07/10/11 06:55 PM 07/10/11 06:55 PM
Joined: Feb 2006 Posts: 474 Alberta, Canada 451Guy mopar
451Guy mopar Joined: Feb 2006 Posts: 474 Alberta, Canada	I have the same issue! I will watch this post with interest! Thanx 451 Guy 512 cu in 71 Demon Super Street Car - NO LONGER - Broke Crank Best ET 9.57 @ 139.96 451 cu in Pump Gas - 71 Demon Super Street Car Best ET 9.99 @ 136.80 512 cu in 69 Charger R/T Best ET 11.39 @ 118.11

Re: DMI and crank trigger [Re: Big B] #1029450 07/10/11 08:56 PM 07/10/11 08:56 PM
Joined: Jan 2003 Posts: 10,766 Central Valley, CA. Quicksilver440 I Live Here
Quicksilver440 I Live Here Joined: Jan 2003 Posts: 10,766 Central Valley, CA.	If they alt stopped working, just take it to a local electrical/motor shop and have it rebuilt.

Re: DMI and crank trigger [Re: Quicksilver440] #1029451 07/10/11 11:47 PM 07/10/11 11:47 PM
Joined: Apr 2007 Posts: 325 Greenville, WI B Big B OP enthusiast
Big B OP enthusiast B Joined: Apr 2007 Posts: 325 Greenville, WI	The alt ate itself up and is not repairable. No one has any ideas? I will probably just go back to my distributor, and sell the DMI/ crank teigger setup if I can't fix this.

Re: DMI and crank trigger [Re: Big B] #1029452 07/11/11 12:04 AM 07/11/11 12:04 AM
Joined: Jul 2010 Posts: 3,502 SOUTH JERSEY HEMIFRED master
HEMIFRED master Joined: Jul 2010 Posts: 3,502 SOUTH JERSEY	Quote: I have the DMI low mount alternator/cranks trigger set up with a 140amp Powermaster Alt. My problem is the motor breaks up really bad above 4500rpms. When I disconnect the belt it runs great. I shielded my pickup Wires with 3 layers of tin foil, but that doesn't help. My alt just died and I need to get a new one. Will a different alt work? I know someone had this same problem like 2 years ago. How did they fix it? forget the foil Did you twist the wires like instructed Quote: Twist the wires of the pickup together several times before connecting it to the MSD wiring harness. Twisting these wires together helps reduce the chances of Electro Magnetic Interference (EMI ). Route the pickup harness along the chassis or engine block. This provides a ground plane that protects against EMI. Do not run the trigger wires along the coil primary wiring or spark plug wires. There are high voltages running through these wires so they should not be close to the pickup wires. Never use solid core spark plug wires with an MSD Ignition system or crank trigger. A helically or spiral wound suppression wire such as MSD�s Heli-Core or 8.5mm Super Conductor Wire must be used. If you are running a digital ignition control or aftermarket EFI system, it is highly recommended to use a shielded harness, PN 8862, to prevent the chance of EMI interfering with the trigger signal home of the Sox and Martin Hemi Duster

Re: DMI and crank trigger [Re: HEMIFRED] #1029453 07/11/11 08:19 AM 07/11/11 08:19 AM
Joined: Apr 2007 Posts: 325 Greenville, WI B Big B OP enthusiast
Big B OP enthusiast B Joined: Apr 2007 Posts: 325 Greenville, WI	Actually I didn't twist the wires off the trigger sensor. Hopefully when I replace the alt that will fix it. I might buy a shielded cable too, since the tin foil looks like crap. Would a MSD noise filter do anything?

Re: DMI and crank trigger [Re: Big B] #1029454 07/11/11 03:12 PM 07/11/11 03:12 PM
Joined: Jan 2003 Posts: 4,074 Shelby Twp. Mi HardcoreB master
HardcoreB master Joined: Jan 2003 Posts: 4,074 Shelby Twp. Mi	Can you just move the pick-up to the other side of the motor?

Re: DMI and crank trigger [Re: HardcoreB] #1029455 07/11/11 05:30 PM 07/11/11 05:30 PM
Joined: Apr 2007 Posts: 325 Greenville, WI B Big B OP enthusiast
Big B OP enthusiast B Joined: Apr 2007 Posts: 325 Greenville, WI	The oil filter is in the way. Would have to buy a remote oil filter kit. Hopefully I won't have to do that.

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