Join Date: Sep 2001
Location: Temple City, Ca
Not me. I really don't believe that there is such a thing as a relay upgrade or that it is needed. I've read the articles but running a test on an old car flaws the data. I agree that their system has some merit if you install headlights that require a lot of current, not brightness, they are two different things. Otherwise it's just replacing old with new.
I don't doubt the readings they got. I believe they took accurate measurements. I only wish they did the math to back up the measurements. There's about 6 feet of 16 gage wire between the horn relay and the bulkhead connector. The per foot resistance of that gage is a textbook number. It can be found in the Machinists Handbook amongst other books. Along with that wire, there are 4 connectors I can think of, perhaps 8 crimp joints, 2 switch contacts, and the 18 gage return wire to the lamps. A loss from 14 down to 11 volts doesn't add up, unless one is discussing old corroded wire and sockets versus a new factory harness.