What I do on all the EFI and actually everything I wire now, is a "floating" ground system. I attach a copper bus bar on rubber isolators under the dash. I run the cable from battery to bus bar and run all high draw grounds to this bar, such as ignition, pumps, fans, etc. I also tie both heads together and run a ground wire to bus bar as well. The ONLY thing I ground to the actual chassis or sheetmetal is the lights

Monte




Monte, I assume you run the MAIN -ve batt cable to the bus bar under the dash so that the bus bar gets is grounding from the batt cable itself, and NOT the body ? Or in other words, the bus bar is NOT grounded to the body/mounted on isolators/non conductive mounts....right?

That would be a decent gauge cable if thats the case - do you run it inside the car ?