srgunz Posted September 6, 2006 Share Posted September 6, 2006 MSD ignitions highly recommends that engines with aluminum heads be grounded to the block with ground strap. This is because one of the problems encountered with failure of the MSD box is high secondary resistance. I have added a picture of how I added a supplement ground using existing threaded holes in the head and block. I picked up the strap at a retail hot rod shop. It was just the right length. Pardon dirty motor. Quote Link to comment Share on other sites More sharing options...
tannji Posted September 7, 2006 Share Posted September 7, 2006 Interesting.... thanks! = ) Quote Link to comment Share on other sites More sharing options...
dr_hunt Posted September 7, 2006 Share Posted September 7, 2006 Grounding is absolutely necessary on any engine not just those with MSD's. Poor or lack of grounding the engine to the frame, body, and battery when using rubber engine mounts will cause all kinds of problems. IMO you need to ground heads to the body or frame, block to the frame and battery to the frame, and body to the frame. It is easy and can be very inconspicuous. Quote Link to comment Share on other sites More sharing options...
HeatRaveR Posted September 9, 2006 Share Posted September 9, 2006 I grounded mine to that same head bolt near the top of the picture, but I ran the other end directly the battery terminal. Should that suffice as well, or should I run it to the body (probably near the shock tower)? Quote Link to comment Share on other sites More sharing options...
dr_hunt Posted September 9, 2006 Share Posted September 9, 2006 better to overground everything than underground, a floating ground will drive you bananas and plays hell with MSD or any cd ignition. Quote Link to comment Share on other sites More sharing options...
Careless Posted September 9, 2006 Share Posted September 9, 2006 and make sure to shield signal wires! Quote Link to comment Share on other sites More sharing options...
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