[RICK LAKE]

davids2toys David I run mine MSD directly to the battery with a fusable link of 40 amps on the + side. I do have a master battery cut off for the car that kills everything but power to my ECU. There have been other threads on here about how much power a 6AL module uses. I am in the 8-12 amp range and the Spike of the system I have not done. If the module draws so little ampage from the electrical system, then why is 12# gauge wiring being used?? I had a problem with high resistance when I first finished the car. You need good grounds with FI systems. I moved the battery to the trunk and main connection was in the trunk. Problem was the motor and trans are isolated with rubber mounts. Yes there is a ground wire on the ERA but FI systems need more. If you do the bolts through the motor mounts and have clean areas of contact this will work OK. I overkill things. I Have 2 grounds to the motor. 1 to the block and one to the head R/S. It is important that the thread holes be clean and no paint on the ground areas. I have a Shelby block and heads of aluminum and it is not the best conductor of juice.
Side note for MSD, I mounted my unit under the glove box with my ECU for the FI system. The R/S foot ducting blows fresh air on both modules to help keep cool. I know that these MSD module gets hot. I had a failure of a new one from working on the car and welding to the frame without unhooking the battery. Good thing it was covered by warranty and fixed for free. I don't know if Pat is right or wrong, I followed the manual for installation, 15 years of racing with same box. Cap and rotor in the distributor, that's a different story, carry spares. Rick L. Ps I also have spare MSD and complete distributor and basic tools to install, just in case. Last note, I solder and climp connectors on my wire ends and use shrink tubing to weather proof sealing. I also use star washers that add bite to a connection and help reduce resistance there. Spraying a connection with grease, paint, undercoating, or sealer, The jury is still out on this. I do use electric dye grease on all my connections. It seals connections and no loss of resistance to that connection. It's a GM fix for years with out side connections under the car or truck. Good luck.