FordFETruck Posted February 23, 2023 Share Posted February 23, 2023 Bummer on getting COVID again. Sounds like the same symptoms I had, but it took weeks before I was fully back up to speed. Anyway, glad you have used the time to get things done. Installed a smaller alternator pulley today. Went from the stock 75mm to a 60mm powermaster pulley. Made quite a difference in slow speed charging with everything on - it keeps up now. Pulley ratio went from 2.68:1 overdriven to 3.38:1 Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted February 23, 2023 Share Posted February 23, 2023 Installed a smaller alternator pulley today. Went from the stock 75mm to a 60mm powermaster pulley. Made quite a difference in slow speed charging with everything on - it keeps up now. Pulley ratio went from 2.68:1 overdriven to 3.38:1 Interesting Is that a 1G or 2G alternator? Those of us with 3G's are often looking for a bigger pulley to eliminate chirp or squeal on startup. (not only the ratio but more belt contact) Many of us resort to a LRC (white) regulator that ramps up. Link to comment Share on other sites More sharing options...
Gary Lewis Posted February 23, 2023 Author Share Posted February 23, 2023 Installed a smaller alternator pulley today. Went from the stock 75mm to a 60mm powermaster pulley. Made quite a difference in slow speed charging with everything on - it keeps up now. Pulley ratio went from 2.68:1 overdriven to 3.38:1 Glad that worked. But do you have any belt squeal on startup? Also, note that the alternator would have spun at 13,400 RPM when the engine hit 5000, but will now hit 16,900. I don't know what the limit is on the windings, but that is a lot of spinning. Link to comment Share on other sites More sharing options...
mat in tn Posted February 24, 2023 Share Posted February 24, 2023 Glad that worked. But do you have any belt squeal on startup? Also, note that the alternator would have spun at 13,400 RPM when the engine hit 5000, but will now hit 16,900. I don't know what the limit is on the windings, but that is a lot of spinning. who turns a stock 300 5k? Link to comment Share on other sites More sharing options...
FordFETruck Posted February 24, 2023 Share Posted February 24, 2023 Glad that worked. But do you have any belt squeal on startup? Also, note that the alternator would have spun at 13,400 RPM when the engine hit 5000, but will now hit 16,900. I don't know what the limit is on the windings, but that is a lot of spinning. It's a 60 amp 1G and no belt squeal. The same pulley is on a power master 70 amp 1G in my dad's 64 galaxie with a 445 FE stroker and it also works great. According to Powermaster 18000 alternator rpm is max safe and most can handle 20000 alternator rpm intermittently without any issues. Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted February 24, 2023 Share Posted February 24, 2023 Glad that worked. But do you have any belt squeal on startup? Also, note that the alternator would have spun at 13,400 RPM when the engine hit 5000, but will now hit 16,900. I don't know what the limit is on the windings, but that is a lot of spinning. Remember Gary, a single belt can handle well over 100A before it starts slipping (if Ryan's videos were any indication) And the 1G & 2G were never putting out more than 30A at idle. It's only the vastly more powerful 3G internals that cause issues (because they put out more than that at 600 engine rpm) Link to comment Share on other sites More sharing options...
FordFETruck Posted February 24, 2023 Share Posted February 24, 2023 Remember Gary, a single belt can handle well over 100A before it starts slipping (if Ryan's videos were any indication) And the 1G & 2G were never putting out more than 30A at idle. It's only the vastly more powerful 3G internals that cause issues (because they put out more than that at 600 engine rpm) This is the giant pulley I had on my 3G, belt still squealed on startup in dry weather and had horribly short belt life since I had to run it so tight on belt tension. Even with a soft start regulator that single V belt was no match. Belt alignment was good and it didn't make much difference on belt brand either. I don't have any additional load requirements on the truck so I figured a 1G would be just fine. I wasn't going to put a 2G back in it. I have been happy with my other 1G equipped vehicles as well. Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted February 24, 2023 Share Posted February 24, 2023 This is the giant pulley I had on my 3G, belt still squealed on startup in dry weather and had horribly short belt life since I had to run it so tight on belt tension. Even with a soft start regulator that single V belt was no match. Belt alignment was good and it didn't make much difference on belt brand either. I don't have any additional load requirements on the truck so I figured a 1G would be just fine. I wasn't going to put a 2G back in it. I have been happy with my other 1G equipped vehicles as well. Wow! 😳 I've never seen a pulley that big. I don't have any problems with belt life and a LRC regulator. I don't want to max out the belt tension and kill my bearings. Yeah, 2G's are the spawn of Satan. I went through two of them before I installed a 3G and retrofitting a stand alone VR didn't appeal to me, but the 1G (in it's various iterations) is a fine answer for most trucks electrical loads. There's nothing wrong with old school! I'm kind of surprised that you're not running a Pertronix module in your Galaxies. I got put off to filing and gapping points when I has an H2 Kawasaki. 😆 Link to comment Share on other sites More sharing options...
FordFETruck Posted February 24, 2023 Share Posted February 24, 2023 Wow! 😳 I've never seen a pulley that big. I don't have any problems with belt life and a LRC regulator. I don't want to max out the belt tension and kill my bearings. Yeah, 2G's are the spawn of Satan. I went through two of them before I installed a 3G and retrofitting a stand alone VR didn't appeal to me, but the 1G (in it's various iterations) is a fine answer for most trucks electrical loads. There's nothing wrong with old school! I'm kind of surprised that you're not running a Pertronix module in your Galaxies. I got put off to filing and gapping points when I has an H2 Kawasaki. 😆 I run a summit racing billet ready to run AKA MSD distributor in my dad's car. It replaced a brand new $300 pee poor pertronix billet flamethrower II distributor that had starting issues even though it passed every test pertronix said to do. In my 4 door daily driver galaxie with points I run a stock distributor with a renberles products dynaflyte 707SD ball bearing dual point with vacuum advance distributor plate. Works fantastic. Link to comment Share on other sites More sharing options...
Gary Lewis Posted February 24, 2023 Author Share Posted February 24, 2023 I run a summit racing billet ready to run AKA MSD distributor in my dad's car. It replaced a brand new $300 pee poor pertronix billet flamethrower II distributor that had starting issues even though it passed every test pertronix said to do. In my 4 door daily driver galaxie with points I run a stock distributor with a renberles products dynaflyte 707SD ball bearing dual point with vacuum advance distributor plate. Works fantastic. Yes, a 1G doesn't put out all that much at idle - or at full tilt for that matter. But spinning it up rapidly made me wonder if the v-belt wouldn't squeal. Apparently not. And I'm glad to see that the alternator can safely spin that fast. Link to comment Share on other sites More sharing options...
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