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Old 02-16-2010, 07:22 PM   #1 (permalink)
4320Diesel
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Twin Altermanators

ok guys i know this is the opposite from the normal around here but i want to add another alternator. my headlights and heater fan suck alot of juice when theyre on. also in the winter the engine eats alot of battery power just to get started then the engine isnt driven long enough to fully charge the 2 cold batteries up. i have a old delco remy alternator off of another 80's chev and i figured if i mount that bugger in the place of where a A/C pump would go on a A/C truck that should help keep the batts up. but i wanted to know how to wire it in so that it works along side the other factory alternator. this alternator needs a new front bearing but i got a whole drawer full of em so thats minor. i just need to know if this will work. and please dont just tell me to get a higher amp alternator. this one was free and i dont have an extra 300 bucks to get a bigger alternator when this one is just sitting on the floor being a tripping hazzard.

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1985 GMC (The Brown Streak) Sierra Classic 1500 4WD With 6.2L V8 Diesel and 4speed NP833 trans with hurst shifter! , 4911 6.5 ip with 6.5 shortie injectors GM-3 turbo. Single plane J code intake from Turbonator (thanks guys!). 3" exhaust and 3" BBQ black stacks! Isspro Pyrometer, Trisco Boost and Engine Oil Temp Gauges.
1998 Dodge Ram 2500 Sport club cab short box 4WD 5 speed 12 Valve cummins. Brentbilt fuel plate. 300 horse motorhome injectors, boost elbow, timing bumped to 18* autometer boost and pyro, 500 horse valair clutch waiting to go in!
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your wrong brent, i'll think of a reason later

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brent can't do that, it would look factory, lol

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Brent is right.
Was there any ever doubt?
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Old 02-16-2010, 07:35 PM   #2 (permalink)
Joeairforce
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Sure it'll work...... The military CUCV's came from the factory that way.......

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Old 02-16-2010, 07:37 PM   #3 (permalink)
4320Diesel
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got any idea how to wire the two to work together? do i just splice the 2 wires at the top of the stock alternator and run them over to the new one and run the rear terminal over to the driverside battery and call it good?
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1985 GMC (The Brown Streak) Sierra Classic 1500 4WD With 6.2L V8 Diesel and 4speed NP833 trans with hurst shifter! , 4911 6.5 ip with 6.5 shortie injectors GM-3 turbo. Single plane J code intake from Turbonator (thanks guys!). 3" exhaust and 3" BBQ black stacks! Isspro Pyrometer, Trisco Boost and Engine Oil Temp Gauges.
1998 Dodge Ram 2500 Sport club cab short box 4WD 5 speed 12 Valve cummins. Brentbilt fuel plate. 300 horse motorhome injectors, boost elbow, timing bumped to 18* autometer boost and pyro, 500 horse valair clutch waiting to go in!
Quote:
Originally Posted by diaric View Post
your wrong brent, i'll think of a reason later

Quote:
Originally Posted by diaric View Post
brent can't do that, it would look factory, lol

Quote:
Originally Posted by Trios View Post
Brent is right.
Was there any ever doubt?
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Old 02-16-2010, 07:46 PM   #4 (permalink)
cub124
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This sounds like a sweet idea besides there is a few things to worry about; charging the battery's with two different voltages would be my #1 concern because they could explode.
You will also have to wire a Diode on each positive side (where the current flows from the alternators to the battery's) this will keep your alternators from running off of one another. Diodes will also drop the voltage a fraction of a volt.

If you need help fabbing anything let me know because I might be interested in using this set up in the winter as I also have a spare 6.2 alternator.
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Old 02-16-2010, 07:49 PM   #5 (permalink)
4320Diesel
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i thought the alternators already had all that garbage inside them. i was hoping it would just be a bolt on splice some wires and giver snot. but i guess its more thinking than i thought.
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1985 GMC (The Brown Streak) Sierra Classic 1500 4WD With 6.2L V8 Diesel and 4speed NP833 trans with hurst shifter! , 4911 6.5 ip with 6.5 shortie injectors GM-3 turbo. Single plane J code intake from Turbonator (thanks guys!). 3" exhaust and 3" BBQ black stacks! Isspro Pyrometer, Trisco Boost and Engine Oil Temp Gauges.
1998 Dodge Ram 2500 Sport club cab short box 4WD 5 speed 12 Valve cummins. Brentbilt fuel plate. 300 horse motorhome injectors, boost elbow, timing bumped to 18* autometer boost and pyro, 500 horse valair clutch waiting to go in!
Quote:
Originally Posted by diaric View Post
your wrong brent, i'll think of a reason later

Quote:
Originally Posted by diaric View Post
brent can't do that, it would look factory, lol

Quote:
Originally Posted by Trios View Post
Brent is right.
Was there any ever doubt?
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Old 02-16-2010, 07:57 PM   #6 (permalink)
cub124
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Maybe you know better then me, It sure would make it easy. If I do this Ill make it bolt on/bolt off easy so I can remove it easy in the summer.
My dad has worked with electric most of his life ill check with him to make sure
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1982 K20 6.5L, Bored .020, marine nozzles @ 2800psi, Omega Moose Pump ~130cc, Delta 206 Cam, 0.10 over head gaskets, Center Mount T4 HX40, Water to Air intercooler, Nv4500, 3.73s

2006 GMC 3500 LBZ, KBDP EGR Delete Kit, Air Intake, Exhaust, EFI Live
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Old 02-16-2010, 08:00 PM   #7 (permalink)
4320Diesel
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thad be great. id just leave this one on all year since it wouldnt hurt anything. plus itd really make this truck a hell of a parking lot booster.
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1985 GMC (The Brown Streak) Sierra Classic 1500 4WD With 6.2L V8 Diesel and 4speed NP833 trans with hurst shifter! , 4911 6.5 ip with 6.5 shortie injectors GM-3 turbo. Single plane J code intake from Turbonator (thanks guys!). 3" exhaust and 3" BBQ black stacks! Isspro Pyrometer, Trisco Boost and Engine Oil Temp Gauges.
1998 Dodge Ram 2500 Sport club cab short box 4WD 5 speed 12 Valve cummins. Brentbilt fuel plate. 300 horse motorhome injectors, boost elbow, timing bumped to 18* autometer boost and pyro, 500 horse valair clutch waiting to go in!
Quote:
Originally Posted by diaric View Post
your wrong brent, i'll think of a reason later

Quote:
Originally Posted by diaric View Post
brent can't do that, it would look factory, lol

Quote:
Originally Posted by Trios View Post
Brent is right.
Was there any ever doubt?
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Old 02-16-2010, 08:05 PM   #8 (permalink)
cub124
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The only thing it hurts is a few horse power if I recall my teacher said alternators use 3-5hp.
But it sure would be nice for when I get a bigger sound system! right now 400 watts and on 10 inch dims the lights a bit lol
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1982 K20 6.5L, Bored .020, marine nozzles @ 2800psi, Omega Moose Pump ~130cc, Delta 206 Cam, 0.10 over head gaskets, Center Mount T4 HX40, Water to Air intercooler, Nv4500, 3.73s

2006 GMC 3500 LBZ, KBDP EGR Delete Kit, Air Intake, Exhaust, EFI Live
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Old 02-16-2010, 08:11 PM   #9 (permalink)
cub124
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Alright so the alternators have a diode in them but the voltage regulator is the last thing in the alternator so there for my dad said you would need to run diodes to be safe.
Ill talk to this guy at the local part store about the military set up because he was in the marine core working on these for 4 years. it may be different because they are 24 volt systems
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1982 K20 6.5L, Bored .020, marine nozzles @ 2800psi, Omega Moose Pump ~130cc, Delta 206 Cam, 0.10 over head gaskets, Center Mount T4 HX40, Water to Air intercooler, Nv4500, 3.73s

2006 GMC 3500 LBZ, KBDP EGR Delete Kit, Air Intake, Exhaust, EFI Live
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Old 02-16-2010, 08:14 PM   #10 (permalink)
4320Diesel
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yea but a bracket and pulley system from a military diesel would save alot of time.

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1985 GMC (The Brown Streak) Sierra Classic 1500 4WD With 6.2L V8 Diesel and 4speed NP833 trans with hurst shifter! , 4911 6.5 ip with 6.5 shortie injectors GM-3 turbo. Single plane J code intake from Turbonator (thanks guys!). 3" exhaust and 3" BBQ black stacks! Isspro Pyrometer, Trisco Boost and Engine Oil Temp Gauges.
1998 Dodge Ram 2500 Sport club cab short box 4WD 5 speed 12 Valve cummins. Brentbilt fuel plate. 300 horse motorhome injectors, boost elbow, timing bumped to 18* autometer boost and pyro, 500 horse valair clutch waiting to go in!
Quote:
Originally Posted by diaric View Post
your wrong brent, i'll think of a reason later

Quote:
Originally Posted by diaric View Post
brent can't do that, it would look factory, lol

Quote:
Originally Posted by Trios View Post
Brent is right.
Was there any ever doubt?
Offline   Quick reply to this message
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