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100 amp alternator #1375869 01/26/13 02:56 AM 01/26/13 02:56 AM
Joined: Feb 2006 Posts: 501 CEDAR RAPIDS Plymouth340 OP mopar
Plymouth340 OP mopar Joined: Feb 2006 Posts: 501 CEDAR RAPIDS	got a 60 amp alternator on my mopar (3 wire) and it isnt enough at the drags with fan and waterpump msd 7al etc. what should i get? thinking 1 wire 100amp? part number would be helpful..thanks

Re: 100 amp alternator [Re: Plymouth340] #1375870 01/26/13 03:04 AM 01/26/13 03:04 AM
Joined: Mar 2003 Posts: 9,099 Rogue River, OR Jeremiah master
Jeremiah master Joined: Mar 2003 Posts: 9,099 Rogue River, OR	I have a tuff stuff 100A square back that uses the external regulator. It came from summit: http://www.summitracing.com/parts/tff-7509rfsp You could use a 1-wire as well but I like to be able to use parts from the local store if I am on the road. This is one of the best upgrades I ever did to my car. One smart thing to do would be run a heavy gauge wire from the positive post of the alternator to the starter relay or where ever you are getting power for the add-on's from.

Re: 100 amp alternator [Re: Plymouth340] #1375871 01/26/13 10:14 AM 01/26/13 10:14 AM
Joined: Mar 2009 Posts: 814 in front of the computer 8 80arrow super stock
80arrow super stock 8 Joined: Mar 2009 Posts: 814 in front of the computer	I had used one off a mid 90's pickup with a v-6. Just change the pulley over to a v-groove, was 90-100 amps

Re: 100 amp alternator [Re: 80arrow] #1375872 01/26/13 11:29 AM 01/26/13 11:29 AM
Joined: Jan 2007 Posts: 7,664 IN A ahy master
ahy master A Joined: Jan 2007 Posts: 7,664 IN	The "souped up" squarebacks have more output at high RPM but not so much at idle. With heavy "base load" of fan, WP, fuel pump you likley need more idle output. As posted above, the later model Nippendenso is a good choice if you can adapt brackets. Also the GM case alternators are good. With a 3 wire alternaotor, the sense wire helps compensate for voltage drop in the wiring. You loose this with one wire. With one wire, its really important to have a heavy charge wire... I'd say 6 guage minimum and bigger for a long run.

Re: 100 amp alternator [Re: Plymouth340] #1375873 01/26/13 11:40 AM 01/26/13 11:40 AM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	The Denso alt works great(3 wire units) has real good low rpm out put... 1 run a 85A Denso on both my race car and street rod... plus I like the external reg... why trash a alt if the reg goes bad... plus you can get a high out put reg... I just used the Chrysler production ones... based on where you tap your sense wire you can get different battery voltage... I get 14.9 at the battery on my street rod

Re: 100 amp alternator [Re: Plymouth340] #1375874 01/26/13 11:49 AM 01/26/13 11:49 AM
Joined: Feb 2006 Posts: 501 CEDAR RAPIDS Plymouth340 OP mopar
Plymouth340 OP mopar Joined: Feb 2006 Posts: 501 CEDAR RAPIDS	this is drag race only, and right now i have a big pulley on alt. and the hot wire is heavy gauge ran back to cut off switch at back of car and have constant out put regulator. it dosnt charge much at idle if any

Re: 100 amp alternator [Re: Plymouth340] #1375875 01/26/13 12:08 PM 01/26/13 12:08 PM
Joined: Jan 2003 Posts: 10,766 Central Valley, CA. Quicksilver440 I Live Here
Quicksilver440 I Live Here Joined: Jan 2003 Posts: 10,766 Central Valley, CA.	I've been running a powermaster 140 amp for over 6 years. It's a one wire and I have had no issues at all, It came with an actual test sheet too that showed it put out over 80 amps at idle too. I did have to grind a little on my stock bracket to make it fit though.

Re: 100 amp alternator [Re: Plymouth340] #1375876 01/26/13 05:16 PM 01/26/13 05:16 PM
Joined: Oct 2003 Posts: 7,506 Az Crizila master
Crizila master Joined: Oct 2003 Posts: 7,506 Az	Quote: this is drag race only, and right now i have a big pulley on alt. and the hot wire is heavy gauge ran back to cut off switch at back of car and have constant out put regulator. it dosnt charge much at idle if any Put the smaller pulley on it. Fastest 300

Re: 100 amp alternator [Re: Quicksilver440] #1375877 01/27/13 10:06 AM 01/27/13 10:06 AM
Joined: Jul 2009 Posts: 89 Cleveland, Ohio B BB73Challenger member
BB73Challenger member B Joined: Jul 2009 Posts: 89 Cleveland, Ohio	Quote: I've been running a powermaster 140 amp for over 6 years. It's a one wire and I have had no issues at all, It came with an actual test sheet too that showed it put out over 80 amps at idle too. I did have to grind a little on my stock bracket to make it fit though. I too run a high amp powermaster for fans, aftermarket ign, as well as being able to add on more electronics in the future. At idle with the fans on, Serious radio going, lights on and GPS plugged in It doesn't skip a beat. I've been running it trouble free for many years now.

Re: 100 amp alternator [Re: Plymouth340] #1375878 01/27/13 01:25 PM 01/27/13 01:25 PM
Joined: Jan 2003 Posts: 6,531 Jacksonville, FL Chris2581 master
Chris2581 master Joined: Jan 2003 Posts: 6,531 Jacksonville, FL	I use a Tuff Stuff 100 amp alt with a #4 wire to the cut off switch.Works GREAT. The one I use is the one wire with the generic Ford/GM case. Nautilus Racing- We use Superformance gaskets and Turbo Action converters/products.

Re: 100 amp alternator [Re: Plymouth340] #1375879 01/27/13 01:55 PM 01/27/13 01:55 PM
Joined: Mar 2008 Posts: 5,746 Ontario, Canada Dodgem master
Dodgem master Joined: Mar 2008 Posts: 5,746 Ontario, Canada	I bought the 120 kit from mancini's it is a 3 wire run it with one feild grounded other to blue MP performance regulator (so you regulate to under dash voltage best IMO! ) # 4 to the battery and wow it works great. Think buddy just got one from them not in kit as with me i ened up with a low mount when I went engine plate http://chucker54.stores.yahoo.net/delialbrpk.html now mounted like so

Re: 100 amp alternator [Re: 80arrow] #1375880 01/27/13 04:43 PM 01/27/13 04:43 PM
Joined: Feb 2006 Posts: 501 CEDAR RAPIDS Plymouth340 OP mopar
Plymouth340 OP mopar Joined: Feb 2006 Posts: 501 CEDAR RAPIDS	Quote: I had used one off a mid 90's pickup with a v-6. Just change the pulley over to a v-groove, was 90-100 amps thats what i should do. can i still use my mopar constant output regulator with the mid 90's alternator? wired the same?

Re: 100 amp alternator [Re: Plymouth340] #1375881 01/27/13 06:22 PM 01/27/13 06:22 PM
Joined: Feb 2011 Posts: 1,454 Glendora Ca. J Just-a-dart pro stock
Just-a-dart pro stock J Joined: Feb 2011 Posts: 1,454 Glendora Ca.	Quote: Quote: I had used one off a mid 90's pickup with a v-6. Just change the pulley over to a v-groove, was 90-100 amps thats what i should do. can i still use my mopar constant output regulator with the mid 90's alternator? wired the same? That is what I'm doing, the earlier ones have a V-belt and field connections that are bolt on later ones have serp. belts and goofy plugs for the field wires. Also the pulleys are the same as the small Delco (.665? shaft if I remember right) This is a old pic before I went back to v-belts (after this pic I put a vac pump on it) With the smaller alt pulley it was 2.25 to 1 ratio charged great at idle, but the sudden acceleration coming off the 2 step (3600leave 5500 flash)killed one after a while. Now using a 1.7 ratio and it's happy. Hope this helps Last edited by Just-a-dart; 01/27/13 08:12 PM. "Just a Bracket car dressed up like a streetcar"

Re: 100 amp alternator [Re: Just-a-dart] #1375882 01/27/13 07:02 PM 01/27/13 07:02 PM
Joined: Feb 2006 Posts: 501 CEDAR RAPIDS Plymouth340 OP mopar
Plymouth340 OP mopar Joined: Feb 2006 Posts: 501 CEDAR RAPIDS	Quote: Quote: Quote: I had used one off a mid 90's pickup with a v-6. Just change the pulley over to a v-groove, was 90-100 amps thats what i should do. can i still use my mopar constant output regulator with the mid 90's alternator? wired the same? That is what I'm doing the earlier ones have a V-belt and field connections that are bolt on later ones have serp. belts and goofy plugs for the field wires. Also the pulleys are the same as the small Delco (.665? if I remember right) This is a old pic before I went back to v-belts (after this pic I put a vac pump on it) With the smaller alt pulley it was 2.25 to 1 ratio charged great at idle, but the sudden acceleration coming off the 2 step (3600leave 5500 flash)killed one after a while. Now using a 1.7 ratio and it's happy. Hope this helps what size alt and crank pulley are you running now? i trans brake my car to 5000 and dont want to be losing belts..thanks

Re: 100 amp alternator [Re: 80arrow] #1375883 01/27/13 07:15 PM 01/27/13 07:15 PM
Joined: Sep 2012 Posts: 1,563 Janesville, WI SpareParts pro stock
SpareParts pro stock Joined: Sep 2012 Posts: 1,563 Janesville, WI	Quote: I had used one off a mid 90's pickup with a v-6. Just change the pulley over to a v-groove, was 90-100 amps How was the output down low like at idle? I need to upgrade, bottle heater hits the factory replacement one hard. Thanks

Re: 100 amp alternator [Re: SpareParts] #1375884 01/27/13 10:02 PM 01/27/13 10:02 PM
Joined: Mar 2009 Posts: 814 in front of the computer 8 80arrow super stock
80arrow super stock 8 Joined: Mar 2009 Posts: 814 in front of the computer	Mine seemed to charge at 1000-1200 rpm I think. I don't have the car any more so I can't tell you the pulley size. I ran water pump, fan, magna fuel fuel pump, MSD 7al2. I'd run the fan and water pump after each pass to cool it down and never put the battery charger on in two years. This was with the altenator off the 90's dodge pick-up Last edited by 80arrow; 01/27/13 10:03 PM.

Re: 100 amp alternator [Re: Plymouth340] #1375885 01/27/13 11:12 PM 01/27/13 11:12 PM
Joined: Feb 2011 Posts: 1,454 Glendora Ca. J Just-a-dart pro stock
Just-a-dart pro stock J Joined: Feb 2011 Posts: 1,454 Glendora Ca.	what size alt and crank pulley are you running now? i trans brake my car to 5000 and dont want to be losing belts..thanks Sorry just looked at my notes 1.7 was my target ratio. Current pulleys 4.5 crank/2.5 alt 1.8 ratio. alt pulley is a little small, but I have had no trouble. Around a 5"crank/3"alt (1.67 ratio) would be a good place to start.

Re: 100 amp alternator [Re: Just-a-dart] #1375886 01/27/13 11:39 PM 01/27/13 11:39 PM
Joined: Feb 2006 Posts: 501 CEDAR RAPIDS Plymouth340 OP mopar
Plymouth340 OP mopar Joined: Feb 2006 Posts: 501 CEDAR RAPIDS	Quote: what size alt and crank pulley are you running now? i trans brake my car to 5000 and dont want to be losing belts..thanks Sorry just looked at my notes 1.7 was my target ratio. Current pulleys 4.5 crank/2.5 alt 1.8 ratio. alt pulley is a little small, but I have had no trouble. Around a 5"crank/3"alt (1.67 ratio) would be a good place to start. sounds good i have a 5 inch crank pulley now will get a new 90 amp alt with 3 inch pulley,,thanks

Re: 100 amp alternator [Re: Plymouth340] #1375887 01/29/13 01:25 AM 01/29/13 01:25 AM
Joined: Jan 2007 Posts: 7,664 IN A ahy master
ahy master A Joined: Jan 2007 Posts: 7,664 IN	Quote: Quote: what size alt and crank pulley are you running now? i trans brake my car to 5000 and dont want to be losing belts..thanks Sorry just looked at my notes 1.7 was my target ratio. Current pulleys 4.5 crank/2.5 alt 1.8 ratio. alt pulley is a little small, but I have had no trouble. Around a 5"crank/3"alt (1.67 ratio) would be a good place to start. sounds good i have a 5 inch crank pulley now will get a new 90 amp alt with 3 inch pulley,,thanks "rule of thumb" alternators redline at 16,000 to 18,000 RPM. You probably want to be at around this RPM at engine redline to keep idle output adequate. It depends a lot on the engine setup but 1.67 ratio sounds a bit low. A bigger crank pulley or smaller alternator pulley may be in order.

Re: 100 amp alternator [Re: ahy] #1375888 01/29/13 04:19 AM 01/29/13 04:19 AM
Joined: Dec 2006 Posts: 4,647 aotearoa rebel master
rebel master Joined: Dec 2006 Posts: 4,647 aotearoa	i'm on my 3rd year with this chinese GM knock off. single wire is oh so easy. 7565609-25-12-09_23361.jpg (85 downloads)

Re: 100 amp alternator [Re: Plymouth340] #1375889 01/29/13 07:46 PM 01/29/13 07:46 PM
Joined: Nov 2008 Posts: 1,491 Lethbridge, AB, Canada dangina pro stock
dangina pro stock Joined: Nov 2008 Posts: 1,491 Lethbridge, AB, Canada	if your running the toyota alt. the lexus V8 1UZFE is 100?120Amp, can't remeber, comes in lexus SC400 or LS400 - the 400 designates the motor thats in it.

Re: 100 amp alternator [Re: Plymouth340] #1375890 01/29/13 08:22 PM 01/29/13 08:22 PM
Joined: May 2003 Posts: 6,562 Downtown Roebuck Ont Twostick Still wishing...
Twostick Still wishing... Joined: May 2003 Posts: 6,562 Downtown Roebuck Ont	Quote: this is drag race only, and right now i have a big pulley on alt. and the hot wire is heavy gauge ran back to cut off switch at back of car and have constant out put regulator. it dosnt charge much at idle if any How heavy is the wire to the back of the car? 14.5v going that distance will turn into 12v pretty easy from resistance if you are using something other than the starter cable to charge thru and it won't matter what alt you use. I am assuming the battery is in the trunk? Also depending on how fast it idles, you migh have to go with a smaller pulley. Kevin

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