Battery Isolator-which one!

[Colin Reed]

Chris, it looks like full on racing switches shut off the battery, ignition and short out the alternator via a resistor. Like these ones: https://www.pegasusautoracing.com/produc...RecID=1464

Dave, that makes sense about the cutout. At low revs I guess it is the battery supplying the ignition and it's not until the cutout switches in that the dynamo takes over. I wonder then if the engine is revved and the battery disconnected will it keep running while the revs are high. I guess so but not something I want to try!

Paul, that Lucas one will work fine as a battery isolator. The black switch won't look too out of place on an old car too. I like the red removable key (which looks modern and plastic unfortunately) type because I always have the top down on the MGB so when I park it it is nice to know I can take the key and someone can't come and switch the lights on or something silly (not that anyone ever has).

Simon

HI Simon,
It was Common practice before alternators  To fit a charged Battery start the engine increase the Revs then change  back over to the flat and away you go

Colin
NZ