alternator pulley

stanger8172 · 12-27-2001, 11:31 PM

Anyone know where you can get a smaller than stock alternator pulley? I don't need a whole set, just the one alt. pulley.

Rev · 12-27-2001, 11:39 PM

Are you sure you want it smaller? That would take more power to operate and might over spin it enough to make the alternator fail. An under driven pulley would be larger. I bet March has pulleys available individually, but you might have to order it from your favorite speed shop. Check Summit.

Rev

stanger8172 · 12-27-2001, 11:56 PM

I just don't want to keep charging the battery every month. Would a better option be to yank out the stock alt. and install a 140 amp alt.?

avbcon12 · 12-27-2001, 11:58 PM

YES!

it solved all of my problems.

adam

1969Mach1 · 12-28-2001, 12:01 AM

Yeh, I gotta check my alternator. I think it's my battery that is just old and crappy.

cyberstang5.0 · 12-28-2001, 08:36 AM

I bought a 140amp alt and it was great....when I have driving.... When I was at idle, it wouldn't charge like it should. I used the stock pully and the underdrive pully and nieither one fixed my problem. So, I called March and bought the overdrive pully. It worked great (for the first two weeks). One day on my way to school, my regulator blew and fried my headlights (Ford had internally regulated alts). So, I went back to the stock alt. I still have poor charging at ldle but as long as my car runs, I am not that concerned about it. I am going to put the overdrive pully on the stock alt and see if that helps.

stanger8172 · 12-28-2001, 11:13 PM

I am looking to see where it is drawing from. I ran an electical systems analyzer and it showed the alternator is shot and there is draw somewhere. I have a Powermaster 140 amp coming tomorrow so hopefully, me and my girlfriend will be able to party down on New Year's.

dinomite · 12-29-2001, 10:58 AM

ya, get a 140, it fixed all my problems.

Unit 5302 · 12-29-2001, 06:59 PM

I agree. Go with the G3 alternator that puts out 130amps+ If you go to a smaller pulley, you'll exceed the alternator's operating range in rpm causing a discharge.

There are a couple places that can cause a drain in the alternator. The internal rectifier is the most common part to fail like that.

12-27-2001, 11:31 PM	#1
stanger8172 Registered Member Join Date: Nov 2000 Location: Milwaukee,Wisconsin Posts: 380	alternator pulley Anyone know where you can get a smaller than stock alternator pulley? I don't need a whole set, just the one alt. pulley. __________________ '91 LX convertible , T-5, Centerforce Dual Friction, MSD Blaster Coil, FR 9MM wires, 13* timing, 1.6rr, ported/polished/milled stock heads, 1.94/1.60 stainless valves, March Performance Pulleys, K&N panel, 1"spacer, BBK shorties, 2 1/2" off road H, Summit 2 1/2" catback

12-27-2001, 11:39 PM	#2
Rev Registered Member Join Date: Nov 1998 Location: Houston, Tx. Posts: 3,887	Are you sure you want it smaller? That would take more power to operate and might over spin it enough to make the alternator fail. An under driven pulley would be larger. I bet March has pulleys available individually, but you might have to order it from your favorite speed shop. Check Summit. Rev __________________ '66 Coupe, 306, 350-375 HP, C-4, 13.07 e.t., 104.8 mph, 1/4 mi. O.B.C. #2 '66 coupe

12-27-2001, 11:56 PM	#3
stanger8172 Registered Member Join Date: Nov 2000 Location: Milwaukee,Wisconsin Posts: 380	I just don't want to keep charging the battery every month. Would a better option be to yank out the stock alt. and install a 140 amp alt.? __________________ '91 LX convertible , T-5, Centerforce Dual Friction, MSD Blaster Coil, FR 9MM wires, 13* timing, 1.6rr, ported/polished/milled stock heads, 1.94/1.60 stainless valves, March Performance Pulleys, K&N panel, 1"spacer, BBK shorties, 2 1/2" off road H, Summit 2 1/2" catback

12-28-2001, 12:01 AM	#5
1969Mach1 HEY I CAN SET A NAME NOW! Join Date: Oct 2001 Location: Ontario, Canada Posts: 2,556	Yeh, I gotta check my alternator. I think it's my battery that is just old and crappy. __________________ 1969 Mustang Mach 1Sold 351-4V Windsor, 4 Speed MACH 1 - Moving At The Speed Of Sound. 1979 Mustang Indianapolis 500 Pace Car For Sale - Email me for Info 302-2V, 3-Speed Auto One of 2,106 made One of 405 sent to Canada. Yes those are caution lights, and No you can't pass me when there on. Ricer Hater's Club - Member #4

12-28-2001, 11:13 PM	#7
stanger8172 Registered Member Join Date: Nov 2000 Location: Milwaukee,Wisconsin Posts: 380	I am looking to see where it is drawing from. I ran an electical systems analyzer and it showed the alternator is shot and there is draw somewhere. I have a Powermaster 140 amp coming tomorrow so hopefully, me and my girlfriend will be able to party down on New Year's. __________________ '91 LX convertible , T-5, Centerforce Dual Friction, MSD Blaster Coil, FR 9MM wires, 13* timing, 1.6rr, ported/polished/milled stock heads, 1.94/1.60 stainless valves, March Performance Pulleys, K&N panel, 1"spacer, BBK shorties, 2 1/2" off road H, Summit 2 1/2" catback

12-27-2001, 11:58 PM	#4
avbcon12 Registered Member Join Date: Jul 2001 Location: West Bloomfield, MI Posts: 391	YES! it solved all of my problems. adam

12-28-2001, 08:36 AM	#6
cyberstang5.0 347ci of HORSE POWER!!! Join Date: Jul 2001 Location: Houston, TX Posts: 1,416	I bought a 140amp alt and it was great....when I have driving.... When I was at idle, it wouldn't charge like it should. I used the stock pully and the underdrive pully and nieither one fixed my problem. So, I called March and bought the overdrive pully. It worked great (for the first two weeks). One day on my way to school, my regulator blew and fried my headlights (Ford had internally regulated alts). So, I went back to the stock alt. I still have poor charging at ldle but as long as my car runs, I am not that concerned about it. I am going to put the overdrive pully on the stock alt and see if that helps.

12-29-2001, 10:58 AM	#8
dinomite The Dude Join Date: Feb 2001 Location: Arlington, VA Posts: 1,262	ya, get a 140, it fixed all my problems.

12-29-2001, 06:59 PM	#9
Unit 5302 Registered Member Join Date: May 1999 Posts: 5,246	I agree. Go with the G3 alternator that puts out 130amps+ If you go to a smaller pulley, you'll exceed the alternator's operating range in rpm causing a discharge. There are a couple places that can cause a drain in the alternator. The internal rectifier is the most common part to fail like that.