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Posted by Daze
on November 8, 2008, 9:31 pm, in reply to "Wiring"
69.145.221.22
but I think can help. The reason you do not want to attach the choke at the wire from the coil is between the coil and the ignition switch there is a ballast resister that drops the 12 volts down to 9 to keep the coil from burning out. Run a separate wire from the ignition switch to the choke.
Also based on what you have said you are doing things the hard way "Perhaps the same lead I need to run to the to the MSD box?" The wire that goes to the + on the coil IS a wire from the ignition switch so all you need to do to hook the MSD box up is:
attach the red wire from the MSD to the wire that was originally attached to the + side of the coil.
attach the white wire from the MSD to the wire that was originally attached to the - side of the coil.
attach the orange wire from the MSD to the + side of the coil
attach the black wire from the MSD to - side of the coil
unlike the electric choke you do not need to worry about the ballast resister with the MSD box because it is designed to work with 5-18 volt trigger so it will function just fine with the 9 volts that would normally be going to the coil
As far as the ground the aluminum intake will not effect the grounding strap. Aluminum is a really good conductor in fact many 120V electrical wires are made of aluminum. Also a grounding strap is often attached to one of the intake bolt and through that bolt you are directly attached to the block. Ether way you should be good to go. A grounding strap is important. Many times an ignition or starter that is working but not quite right is a poor ground issue. I usually use two grounding straps on my motors, one from the block to the firewall and one from the block to the frame.
