1lowryd said:
so to sum it up dump my stock guage which is the 30+ ampmeter, use a ballast resitor, and keep my stock points.
i think you said hook the regulater to the horn relay. my plan is to use a painless harness. which from my experiance when i put one in my 68 camaro is that it eliminates the horn relay.
i`m not sure if my alt is inernaly regulated or not is their any way to tell? it is a gm i took off a 70 something chevy pickup with a 350.
also is their an electronic upgrade for my stock dist.? or is any known that is a direct fit in with my flat head that i could source from something else or a local parts house?
Doc here,
imp:
Sorry for the delay, I lost which one was your post.. :sweat:
Your synopsis is correct. You probably already have a Ballast resistor, but a new one is a good idea.
Are you sure the harness eliminates the horn relay, and Not PROVIDE one at the buss panel?
In a stock configuration, It is not possible to provide power from the horn button to the horn without a relay, as the horn button wire is on GROUND when pushed. This wire provides Ground to the horn relay, closing the contacts to provide power to the horn.
Without a relay, this would require a re~wire of the horn button mechanical configuration, removing the floating ring from ground , and isolating it to provide direct power..(inside the column, a major modification).
Besides that, I doubt the Horn ring and the movable contact would withstand that much current for direct power to the horns for very long..the floating "brush" would pit, Carbonize, and burn up as well as the copper ring.Horns DO draw a lot of current.
Chances are good that if it is a mid to late 70's 12 SI alternator, it is internally regulated. If the posts say, "B", "A", and "F", It is EXTERNAL, If they are Numbered, "1" and "2" with a single connector on the top, It is internal.
INTERNALLY REGULATED, 12 SI SERIES ALTERNATOR.
As Far as an Electronic upgrade for a Flattie Dizzy, I really couldn't tell you, I assume someone has come up with a product for that, but I have not run across it yet. That might be better asked on a Flathead site. OR in an Email to Mallory or other manufacturer.
Doc
imp: