Bob Rawle

In the last two weeks I have remapped two cars fitted with a "circle earth" kit, these are designed to level the ground plane around the engine bay to minimise sensor interferance and differential float. On both cars the kit had been installed and the main earth from battery to engine disconnected. Both cars were using the same kit from the same source (blue cables)

THIS IS NOT CORRECT !!

You must leave this main earth connection in place and install the kit IN ADDITION.

I gather from discussion with the owners that the kit is supplied with instructions to actually remove the factory earth and rely on the supplied kit.

Also the cables were supplied so that point to point connection could only be made in series to some parts of the engine bay, in practice all points should be connected in parallel from the battery negative.

So if you have a circle earth kit as mentioned above suggest you make sure that the original earthing is intact.

Bob

PhilA

Thanks for the info.

Sounds like an inferior earth kit to me. even the nice and cheap one's from the P1WOC connect the leads to the battery in parallel and replace the factory battery to earth lead.

ALi-B

iTrader: (1)

Imo it shows how "good" these kits are, and the manufacturers are just peddling snake oil. They should never substituted for the factory earth leads, unless an equilvenet is supplied connecting to the exact same points and of equal or better current ratings.

Anything with a metal body that is connected to the engine/gearbox or chassis is earthed. If there is a problem, well, it's nothing a bit of sandpaper, wire brush or wool and some battery grease wouldn't cure.