Re: 440 msd6al installed what can i remove now
[Re: jbcuda]
#211713
02/02/09 11:18 AM
02/02/09 11:18 AM
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Joined: Feb 2003
Posts: 21,318 Manitoba, Canada
DaytonaTurbo
Too Many Posts
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Too Many Posts
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
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You can ditch the ecu but I think you need to keep your ballast resistor, not sure though. The installation diagram for the MSD shows the red wire going to your old coil + wire. The coil + wire gets its power directly from the ballast. The ballast is there to step down voltage to the coil, because full voltage is too much and will burn it out. I know some aftermarket coils don't need ballast resistors at all, but some do, so you probably still have to run the correct ballast resistor for your specific coil. Or does the MSD unit somehow 'know' how much voltage your stock coil gets? I can see if you run an aftermarket msd coil, but for a stocker?
Anyone else, am I wrong or am I right? I've had a msd 6al sitting in a box in my garage for a while that I never did get around to using yet...
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Re: 440 msd6al installed what can i remove now
[Re: DaytonaTurbo]
#211714
02/02/09 12:03 PM
02/02/09 12:03 PM
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Joined: Jan 2003
Posts: 70,126 Here
DirectSubjection
Tacohead. The First and Only
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Tacohead. The First and Only
Joined: Jan 2003
Posts: 70,126
Here
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Quote:
The installation diagram for the MSD shows the red wire going to your old coil + wire.
Actually that's the orange wire - big red goes to the battery directly, small red goes to any switched 12v source.
From the MSD installation PDF:
Ballast Resistor: If your vehicle has a ballast resistor in line with the coil wiring, it is recommended to bypass it.
Last edited by DirectSubjection; 02/02/09 12:03 PM.
Ride eternal, shiny and chrome
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Re: 440 msd6al installed what can i remove now
[Re: DirectSubjection]
#211718
02/02/09 03:39 PM
02/02/09 03:39 PM
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Joined: Dec 2003
Posts: 5,314 Carstairs, Alberta, Canada
dave571
master
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master
Joined: Dec 2003
Posts: 5,314
Carstairs, Alberta, Canada
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Quote:
From the MSD installation PDF:
Ballast Resistor: If your vehicle has a ballast resistor in line with the coil wiring, it is recommended to bypass it.
I've never seen that one.
I have psoted on here quotes from msd instructions that specifically state the ballast can be left in, and in some cases may NEED to be installed to stop a run on position.
As said, the ballast no longer is in the coil cicuit if follow the instructions. MSD unit powers the coil, and the MSD is powered by the battery.
The old coil + wire is normally used as the ign on wire for the msd unit, and works %100 fine with the ballast in place.
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