Posted by karl f on June 17, 2010 at 12:57:55 from (209.188.106.159):
see post & replies http://www.ytmag.com/cgi-bin/viewit.cgi?bd=farmall&th=766857
I tried a 194 bulb. It helps the excitement, since it is now at 3/4 throttle instead of nothing at wide open. not measuring with tach but it is also the cough/kill spot when cold.
My goal is for 1/2 or less to guarantee charging in MN winter during warm up time before throttle can be pulled to higher rpm.
a 194 bulb measures 4 ohm. the sealed panel light i was using measures 30 ohm. Need to find a panel fixture that will fit a 5/8 or 1/2 in hole and take a 194 or a bayonet with 4 ohm or less resistance. tractor has sat a week without getting a dead battery, voltage in the 12.3-12.4 range, so that should indicate no diode leaks in the alternator.
i"m using stock size belt and smallest pulley (2.5in) I can without hood contact (1/4in clearance), which along with low rpm cut in are my goals for the conversion.
Looks like a regulator change or smaller belt with smaller pulley are the only way to get it any better. This alternator maybe even was a 1 wire but I never tested it as such. With the 2.5 pulley and 194 bulb the reman i tried previously might excite sooner as it was probably 500 rpm in my favor compared to the one on there now.
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