truckernix,
Yes, thanks. That is what I intend to try. I appreciate your follow-up. My only concern now (I think) is the amount of current that the pressure switch can handle (7.5 amps, I think). I still do not know the amount of current that two chokes will draw. If I blow fuses or burn-out the pressure switch, I'll get a new switch and use a relay. I am trying to do this as neat-and-simply as possible.
Jerry and others have convinced me that the oil-pressure switch is the way to go. I am now on hold with Holley technical support to see if they can give me more info on the chokes and the switch.
Tim
OK, Holley says the choke draws about 5 amps (12v) and the oil-pressure switch will handle that. The switch would most likely not handle the draw for 2 chokes (at 12v). I did not even get into the 6v issue. He said just connect the chokes to the ignition switch.
New options (in order of simplicity and functionality):
1. Choke one carb, using the oil-pressure switch (12v, 7.5 amp).
Why not: This might not work with the choke's 5 amp draw at 6v?
2. Use a 6v 20 amp relay (if available) triggered by the appropriate pole on the voltage regulator and powered by a fused lead to the starter or to another heavy power source in the engine compartment.
Why not: Is such as relay available (I'll check with Jolly - neither Hella nor Bosch have their ratings on-line)?
3. Use a fused junction block, fed by the switched lead on the ignition switch.
Why not:
(a) The choke would be heated as long as the switch is open (even if the engine stalled) - not desirable but it would work. (b) This might then result in an additional 20 amp draw on the ignition switch - not desirable?
4. Use an oil switch to trigger a 6v 20 amp relay.
Why not:
(a) This is the most complex (most fittings, parts, and wires).
(b) Costs a little more than any other option.
(c) Depends on finding a 6v 20 amp relay.
