Join Date: Jul 2006
Location: Northfield, Illinois
Yes, street cars might need them, while many racers (me) may or may not use one. Believe it or not, there IS a electronic differential between engine and Webers without the ground strap, engine running. Air passing through Webers may generate a static charge on the Webers. This seems to be a running condition only, so I think it's caused by airflow. My GTA engine has never had a grounding strap. If I adjust the idle mix in semi darkness, my screwdriver tip generates a SPARK as it gets close to any idle mix screw.
Is this dangerous? Fifty plus years with this engine, adjusting idle mix, nothing has blown up or ignited fuel vapors. Another 1600 single plug race engine I own had the strap, and no static spark from idle adjust screw. I replaced insulator / isolator rubbers, and left the strap off, and now it has the spark-in-the-dark, like the GTA engine.
This may be some left over ignition static, I don't know. You cannot "feel" it if you touch the screws or Webers with your fingers when the engine is running. I will leave the actual cause of the electrical differential to one who really knows where it comes from.
All from my own experiences over time.
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Illinois SNO Alfa Chapter Director
Illinois SNO Ferrari Chapter Director
and sometimes, CONFUSED AND INCORRECT, but Larry helps me out.
Illinois Chapter Director AND Charter Member of THE CONFUSED AND INCORRECT