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do i need my ecu #463771 09/09/09 10:01 AM 09/09/09 10:01 AM
Joined: Feb 2009 Posts: 51 bristol tn J jbcuda OP member
jbcuda OP member J Joined: Feb 2009 Posts: 51 bristol tn	i have a 74 cuda with 440 getting ready to install msd 6al with pro billet dist what all will i b able to eliminate as far as stock components. dont forget im just learning as i go

Re: do i need my ecu [Re: jbcuda] #463772 09/09/09 10:11 AM 09/09/09 10:11 AM
Joined: Mar 2003 Posts: 15,491 the boonies aarcuda I Live Here
aarcuda I Live Here Joined: Mar 2003 Posts: 15,491 the boonies	no ecu needed

Re: do i need my ecu [Re: aarcuda] #463773 09/09/09 10:34 AM 09/09/09 10:34 AM
Joined: Feb 2009 Posts: 51 bristol tn J jbcuda OP member
jbcuda OP member J Joined: Feb 2009 Posts: 51 bristol tn	thanks so can i just remove the ugly plug for it and tape it up what about the ballast resistor is it a necessity

Re: do i need my ecu [Re: jbcuda] #463774 09/09/09 10:57 AM 09/09/09 10:57 AM
Joined: Nov 2004 Posts: 2,825 Sk. Canada RemCharger master
RemCharger master Joined: Nov 2004 Posts: 2,825 Sk. Canada	Quote: thanks so can i just remove the ugly plug for it and tape it up what about the ballast resistor is it a necessity RTFM!!!(that means check your instructions..

Re: do i need my ecu [Re: jbcuda] #463775 09/09/09 03:41 PM 09/09/09 03:41 PM
Joined: Feb 2003 Posts: 21,318 Manitoba, Canada DaytonaTurbo Too Many Posts
DaytonaTurbo Too Many Posts Joined: Feb 2003 Posts: 21,318 Manitoba, Canada	Quote: thanks so can i just remove the ugly plug for it and tape it up what about the ballast resistor is it a necessity Remove the ballast and use a wire to connect the ends together to bypass it.

Re: do i need my ecu [Re: DaytonaTurbo] #463776 09/09/09 04:38 PM 09/09/09 04:38 PM
Joined: Nov 2004 Posts: 2,825 Sk. Canada RemCharger master
RemCharger master Joined: Nov 2004 Posts: 2,825 Sk. Canada	Quote: Quote: thanks so can i just remove the ugly plug for it and tape it up what about the ballast resistor is it a necessity Remove the ballast and use a wire to connect the ends together to bypass it. Ummmm doesn't it depend on what type of coil you have? Or does going to a 6al make the coil need more voltage...

Re: do i need my ecu [Re: RemCharger] #463777 09/09/09 05:55 PM 09/09/09 05:55 PM
Joined: Mar 2003 Posts: 15,491 the boonies aarcuda I Live Here
aarcuda I Live Here Joined: Mar 2003 Posts: 15,491 the boonies	Quote: Quote: Quote: thanks so can i just remove the ugly plug for it and tape it up what about the ballast resistor is it a necessity Remove the ballast and use a wire to connect the ends together to bypass it. Ummmm doesn't it depend on what type of coil you have? Or does going to a 6al make the coil need more voltage... the coil gets its power and from the MSD box. the 12v from IGN on only turns the box on and off. the coil voltage comes from a big transformer in the MSD box which gets its main power from a separate power lead (not the 12v ign power). So the ballast resistor does NOTHING

Re: do i need my ecu [Re: aarcuda] #463778 09/09/09 06:36 PM 09/09/09 06:36 PM
Joined: Oct 2004 Posts: 798 Nebraska FASTBACK66 mopar addict
FASTBACK66 mopar addict Joined: Oct 2004 Posts: 798 Nebraska	So where is a good, safe place to get the needed 12v ignition power from. I ask because I am doing the same setup. MSD even sent out a new ballast to use. Can I get it from the now unused ballast hot side? Vinny

Re: do i need my ecu [Re: DaytonaTurbo] #463779 09/09/09 06:50 PM 09/09/09 06:50 PM
Joined: Feb 2003 Posts: 21,318 Manitoba, Canada DaytonaTurbo Too Many Posts
DaytonaTurbo Too Many Posts Joined: Feb 2003 Posts: 21,318 Manitoba, Canada	If you're using a msd 6al or similar type box, you don't need a ballast resistor. Those units have a current-limiting system built into them. Your original chrysler ecu did NOT have a current limiting feature, hence the need for the ballast to keep the coil from overpowering itself during normal driving. Read your instructions, they have this info in it. Even my new msd coil instructions say to ONLY use a ballast resistor if you're using an ignition that does not have a current-limiting circuit built into it.

Re: do i need my ecu [Re: DaytonaTurbo] #463780 09/09/09 07:09 PM 09/09/09 07:09 PM
Joined: Aug 2007 Posts: 6,096 Valencia, España NachoRT74 master
NachoRT74 master Joined: Aug 2007 Posts: 6,096 Valencia, España	MSD system doesn't require ballast to coil because the coils is not getting anymore constant power on each spark pulse making it heat. Being now MULTIspark, won't get power constantly to get heated and damaged. Gets some cold between spark to keep it safe With a Charger born in Chrysler assembly plant in Valencia, Venezuela

Re: do i need my ecu [Re: FASTBACK66] #463781 09/09/09 09:46 PM 09/09/09 09:46 PM
Joined: Mar 2003 Posts: 15,491 the boonies aarcuda I Live Here
aarcuda I Live Here Joined: Mar 2003 Posts: 15,491 the boonies	Quote: So where is a good, safe place to get the needed 12v ignition power from. I ask because I am doing the same setup. MSD even sent out a new ballast to use. Can I get it from the now unused ballast hot side? Vinny yes or you can jump across the ballast resistor. look at this link http://www.msdignition.com/uploadedFiles/MSDIgnitioncom/Products/Ignitions/6420_instructions(1).pdf under the figure entitled "CHRYSLER IGNITIONS Wiring a Chrysler Electronic Ignition using Magnetic Pickup Trigger" on page 19

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