I am looking into buying a new alternator for my 67 GS400. At the same time I want to change out the voltage regulator as well. Where is the best place to get stock parts and what should I be looking for as far as the alternator goes. One Wire....Two wire...I just want a drop in replacement. Thanks for any help,
If you want to use a drop in unit, you will need a direct replacement, which will be another 10 DN unit. It will plug directly into the two connectors that came off of the original. Clocking will be an issue, and depending on the electrical loads the vehicle experiences. If you have added electrical loads, you will require additional capacity, say above 60 amps. Ray
I just swapped on a 12SI internally regulated 135 amp alternator from alterstart systems. i think their website is like, 4alterstart.com Anyway, it was only 70 bucks plus shipping, puts out 55 amps at idle. I purchased it as a one wire alternator off of ebay and installed a 3 wire voltage regulator from a spare that i had laying around. It is based on the 12SI internally regulated alternators from the 80's. Pretty simple swap, drops right in place of the old alternator, and a little bit of wiring changes are all that is needed. On the voltage regulator, connect the blue wire to the brown wire with a jumper lead and plug it back up with the terminals bent so they dont make contact. This way it looks stock, doesnt cut up any wiring, and can be swapped back to the old style by just pulling out the jumper wire and bending the tabs a bit. At the alternator, you need to buy a different plug to work with the new alternator. Tap into the blue wire at the alternator and connect this to terminal 2(?) on the alternator. Terminal (1?) has the larger red wire and is your voltage sensing wire, which can be placed at the alt. battery terminal, or anywhere else in the electrical system to compensate for voltage drop throughout the wiring. This is a very big plus if your working with high powered electronics. 3 wire alternator is the way to go, and is really simple to install. Later
