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Need higher output Alternator? Suggestions?

Posted By: Kirby

Need higher output Alternator? Suggestions? - 04/15/10 03:23 PM

Still working on my Cuda' project, and I'm getting closer. I have put tons of electrical stuff on it, and I'm thinking I'll have put put a higher output alernator on ie. 100 amp. I have a stereo/amp, electric fuel pump,H1 H4 headlights on relays, A/C, Electric fans, etc. I ran a solid wire through the bulk head connector, and have eliminated the Amp meter. I have been using the Bouchillon brackets for the A/C- so I have a single groove alt on there now. What is the most recommended alt? Is it going to be a problem with the pulleys/brackets that I have in there now? Wiring? Thanks- I'm sure this has been covered before- but I couldn't find it by searching.
Posted By: NachoRT74

Re: Need higher output Alternator? Suggestions? - 04/15/10 04:33 PM

one of the best recomended is Tuff Stuff brand... I have heard bad things about Powermasters

but I can talk just by reference, not personal experience.

I will go with TuffStuff when I can afford one ( $130-150 rate )
Posted By: kick_the_reverb

Re: Need higher output Alternator? Suggestions? - 04/15/10 05:32 PM

Stock Denso from a 89-91 Ram Van, 140 amp option.
Make sure you use a decent sized crank pulley (so it's not turning too slow), and use heavy gauge wires. I used #4 welding cable as the positive wire, and I added a #4 welding cable as the ground. My battery cables are 1/0.
Ran
Posted By: Lefty

Re: Need higher output Alternator? Suggestions? - 04/15/10 07:55 PM

I'm running a 120 amp Denso using AndyF's low mount bracket kit. It's for the RB motor, don't know if they have it for other motors. You can get the kit including alternator or just the brackets from Mancini Racing.

Posted By: AndyF

Re: Need higher output Alternator? Suggestions? - 04/15/10 09:09 PM

Looks good Lefty. I've sold a lot of those 120 amp kits. One customer complained about it not fitting in an A body but that didn't really suprise me. It isn't like the A body inner fenders were designed for both a big block and a 120 amp alternator!
Posted By: denfireguy

Re: Need higher output Alternator? Suggestions? - 04/15/10 09:10 PM

To determine how much alternator you need, you just need to total your current draw. I think you will be amazed at how little you have added.
The head lights you put in draw less current than the old tungsten lamps the car came with. The air only draws 7 amps more than the heater. The stereo is probably fused at 15 amps and draws about half that. The fuel pump if it is a Holley or a Carter draws 2 amps. The relays that run your headlights will be another amp or so. The only thing I dont have a feel for would be the radiator fans. I would have to look that up.
If you keep the battery trickle charged or battery removed when the car is long term storage, the total current draw will be in the 35 amp range with everything on. The only heavy lifting the alternator does is recover from a low or dead battery. That is why it is always better to charge a battery rather than jump it. Since your removed your ammeter, you will not know when the battery is drawing heavy current charging up.

Craig
Posted By: Von

Re: Need higher output Alternator? Suggestions? - 04/15/10 09:12 PM

Look in the tech archives for a thread on using a GM CS120(I think that is the right number) alternator.

I am using one and AFAIK it works great!! Easy to fab and wire in also.
Posted By: kilroy

Re: Need higher output Alternator? Suggestions? - 04/15/10 09:47 PM

Hook yourself up with a denso out of a modern dodge truck that we like to rob so many part out of. They take an external regulator just like what is already in your car and they have high output. they are all over junk yards.
Posted By: DrCharles

Re: Need higher output Alternator? Suggestions? - 04/15/10 10:20 PM

Quote:

Look in the tech archives for a thread on using a GM CS120(I think that is the right number) alternator.

I am using one and AFAIK it works great!! Easy to fab and wire in also.



Were you thinking of a CS130? those are very common. I picked one up at a swap meet last summer for $20 expecting to use it for a core, but it tested perfect

Electric fans big enough to cool a big-block on the street may well pull more than all the other loads put together... think 30-40 amps!
Posted By: denfireguy

Re: Need higher output Alternator? Suggestions? - 04/16/10 12:24 AM

Quote:

Quote:

Look in the tech archives for a thread on using a GM CS120(I think that is the right number) alternator.

I am using one and AFAIK it works great!! Easy to fab and wire in also.



Were you thinking of a CS130? those are very common. I picked one up at a swap meet last summer for $20 expecting to use it for a core, but it tested perfect

Electric fans big enough to cool a big-block on the street may well pull more than all the other loads put together... think 30-40 amps!

Just looked it up. The biggest one on Summit site was the Flex-a-lite 775 and it draws 28 Amps. That takes you up to about 65 Amps total. That would be 812 Watts or about 1.1 horsepower lost in the alternator, if conversion is 100% efficient.
Craig
Posted By: Dodgem

Re: Need higher output Alternator? Suggestions? - 04/16/10 02:07 AM

I got this one too from mancini's! My lord it works good.
http://chucker54.stores.yahoo.net/delialbrpk.html

Attached picture 5928021-Denso120amp.jpeg
Posted By: ahy

Re: Need higher output Alternator? Suggestions? - 04/16/10 02:26 AM

It sounds like a BB with AC? If the old small case MOPAR style isn't enough - and it sounds like it isn't - its tougher to upgrade with AC. The pivot and bracket bracing is different than non AC cars.

With stock style heads, you may fit the GM case Powermaster 140 A unit. I have Ed heads and not enough clearance. I bought one and had to return it. I ran the 75 A Powermaster MOPAR alternator for a while but it wasn't enough. Discharge at idle and barely enough when running with brights and AC.

I wound up going back to the "big case" MOAPAR alternator and brackets from my core engine ('78 Cordoba). Its 100A with lots of idle output. Its a little heavy but performance is great. Rebuilt 100 A alternators are available on order from the chain part stores

I had to extend the water neck about 1 1/2" so the radiator hose would clear the belts and mount the receiver/dryer about 1 1/2" back (Challenger) to clear the alternator since it sticks out more.

Pic in the attached document.

Attached File
5928078-Alternator_pic.doc  (142 downloads)
Posted By: gtx69

Re: Need higher output Alternator? Suggestions? - 04/16/10 02:52 AM

I took my alternator to a shop that rebuild alternators and starters had them to rebuilt it with more amps.69 gtx with air cond'electric fan'fuel pump'cd player and msd i have 75 amps at idle with 100 amps total.I couldn't find any after market one that would work with the factory brackets.
Posted By: bss

Re: Need higher output Alternator? Suggestions? - 04/16/10 02:59 AM

I've ordered several alternators from Motor City Reman before with great results. They'll wind anything you want in just about any alt case you can think of. Great prices too.
Posted By: AndyF

Re: Need higher output Alternator? Suggestions? - 04/16/10 05:45 AM

Quote:

I got this one too from mancini's! My lord it works good.
http://chucker54.stores.yahoo.net/delialbrpk.html



Glad to hear that you like it. That is another one of the kits I make. In fact I was just out in the shop getting a big order of those kits ready to ship out the door. That Denso kit has been super popular over the years.
Posted By: NachoRT74

Re: Need higher output Alternator? Suggestions? - 04/16/10 06:18 AM

Quote:

It sounds like a BB with AC? If the old small case MOPAR style isn't enough - and it sounds like it isn't - its tougher to upgrade with AC. The pivot and bracket bracing is different than non AC cars.

With stock style heads, you may fit the GM case Powermaster 140 A unit. I have Ed heads and not enough clearance. I bought one and had to return it. I ran the 75 A Powermaster MOPAR alternator for a while but it wasn't enough. Discharge at idle and barely enough when running with brights and AC.

I wound up going back to the "big case" MOAPAR alternator and brackets from my core engine ('78 Cordoba). Its 100A with lots of idle output. Its a little heavy but performance is great. Rebuilt 100 A alternators are available on order from the chain part stores

I had to extend the water neck about 1 1/2" so the radiator hose would clear the belts and mount the receiver/dryer about 1 1/2" back (Challenger) to clear the alternator since it sticks out more.

Pic in the attached document.




Yeah thast an Leece Neville alt used mostly on Police and Cab packaged cars, same as tow package as far what I know. ( pic attached )

but is not really related if AC or not. Mostly AC cars got the regular alt.

another option is use a 78 amps alt, available on less tha $50 at auto parts stores

same than the one on this article:

http://www.moparmusclemagazine.com/techa...ator/index.html

Attached picture 5928554-rsz_dsc02891.jpg
Posted By: kick_the_reverb

Re: Need higher output Alternator? Suggestions? - 04/17/10 02:55 AM

Just realized I said I used a Denso 140 amp, sorry I meant the 120 amp that everyone was talking about. To me the Denso alts look a lot more at home on a Mopar engine than those GM alts.

Ran
Posted By: Lefty

Re: Need higher output Alternator? Suggestions? - 04/17/10 05:22 AM

Quote:

I got this one too from mancini's! My lord it works good.
http://chucker54.stores.yahoo.net/delialbrpk.html



I think so too. I attached a Fluke voltmeter to the battery and turned on the headlights and cooling fan while the engine idled and only dropped .1 Vdc
Posted By: DTM_Motorsports

Re: Need higher output Alternator? Suggestions? - 09/26/10 02:09 AM

No Data plate on mine long gone I guess

I can get the 100 Amp one pretty cheap from work
what mounts and regulator would I need ?

Wiring connections?
Posted By: ahy

Re: Need higher output Alternator? Suggestions? - 10/02/10 03:34 AM

The regulator and wiring is the same as the small case unit - with the exception of the output wire. A 6 guage output wire that goes to the fender relay through about 6" of 10 guage fusible link is about right. With this, a voltmeter is needed to monitor status as the ammeter is effectivly bypassed.

Mounts are unique - a JY or core engine is the only source I know of.
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