2 battery 24 volt system? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

hjalbert · 08-30-2002, 10:01 PM

how do i run 2 batterys in my system? any one got any ideas? i want to have two for the cranking power, but dont want to change my alternator or anything. thanks harry

RON WOODGEARD · 08-30-2002, 10:18 PM

HARRY,

Do you actually want to run 24 volts for cranking power??

It's hard on the starters.

Or do you want to run 12 volts but hooked up to 2 batteries in parrellel?? It would stil be 12 volts but it would give greater cranking power in reserve.

I ran this system on my off road truck, You only hook the second battery up (through a toggle and relay) when necessary.

RON

Longhorn Man · 08-30-2002, 10:18 PM

Then you do not want a 24 volt system. To do a 24 volt, you'd run them in series...neg on # 1 to ground, then pos on #1 to neg of #2 and pos on #2 to starter and entire system.
You want to run the in parallel circuit. Basicly pos to pos to starter, and neg to block, and neg to frame.

Low67C10 · 08-30-2002, 10:21 PM

The two battery set-up is nice but its usually set up in parallel running at 12 volts. Its kinda like having a really big battery. Although the 24v idea sounds nice it'd be a real headache and I doubt a GM starter would last very long running @ 24 volts. All you really need is 2 batteries and a battery isolator. The isolator is a box that has 3 posts on it ,one for each battery positive and one for the alternator. Basically it allows the alternator to charge the batteries equally. To make it work to its full potential a high output alternator is recommended. After all is said and done, if all you want is better cranking power, your'e better off buying a quality mini-starter like a Tilton.

mikep · 08-30-2002, 10:22 PM

Heres a better idea....a much better idea! You'll never have starting problems again. I use one and they are the greatest thing around! Its the same one Chevrolet supplies with their 502 big block kits. And alterstarts price is unbeatable! That is a new unit . Its not rebuilt. call your local parts store and see what they want for the same starter. I was quoted $340 or $199 for a rebuilt. Alterstart will have one to your door for $105 brand new!

http://www.4alterstart.com/pages/sto...m/racestarters

Fred T · 08-31-2002, 08:42 AM

24 volts will not hurt the windings on the starter if you don't crank for more than a few seconds, but it will FRY your solenoid. It's a trick used by many with the foot pedal starters when a 6 volt is converted to 12 volt. Leave the 6 volt starter in and it will crank like nothing else.

08-30-2002, 10:21 PM	#4
Low67C10 Registered User Join Date: May 2002 Location: Southern California Posts: 66	The two battery set-up is nice but its usually set up in parallel running at 12 volts. Its kinda like having a really big battery. Although the 24v idea sounds nice it'd be a real headache and I doubt a GM starter would last very long running @ 24 volts. All you really need is 2 batteries and a battery isolator. The isolator is a box that has 3 posts on it ,one for each battery positive and one for the alternator. Basically it allows the alternator to charge the batteries equally. To make it work to its full potential a high output alternator is recommended. After all is said and done, if all you want is better cranking power, your'e better off buying a quality mini-starter like a Tilton. __________________ No, Its not a 454

08-30-2002, 10:22 PM	#5
mikep Used to have a truck Join Date: May 2002 Location: port orchard WA Posts: 1,552	Heres a better idea....a much better idea! You'll never have starting problems again. I use one and they are the greatest thing around! Its the same one Chevrolet supplies with their 502 big block kits. And alterstarts price is unbeatable! That is a new unit . Its not rebuilt. call your local parts store and see what they want for the same starter. I was quoted $340 or $199 for a rebuilt. Alterstart will have one to your door for $105 brand new! http://www.4alterstart.com/pages/sto...m/racestarters __________________ No truck :-(

08-31-2002, 08:42 AM	#6
Fred T Cantankerous Geezer Join Date: Aug 2002 Location: Bel Aire, KS Posts: 6,264	24 volts will not hurt the windings on the starter if you don't crank for more than a few seconds, but it will FRY your solenoid. It's a trick used by many with the foot pedal starters when a 6 volt is converted to 12 volt. Leave the 6 volt starter in and it will crank like nothing else. __________________ Fred There is no such thing as too much cam...just not enough engine.

08-30-2002, 10:01 PM	#1
hjalbert cracker Join Date: Sep 2001 Location: Wilmington, NC Posts: 1,021	2 battery 24 volt system? how do i run 2 batterys in my system? any one got any ideas? i want to have two for the cranking power, but dont want to change my alternator or anything. thanks harry __________________ FOUNDING MEMBER OF THE DRUM BRAKE CLUB Harry John Albert III located in Phoenix, AZ 1972 GMC JIMMY, 1969 lwb Chevy Frame, 1999 bmw k1200 ltc 1992 Kawasaki concours 1991 bmw k75 1973 cortez motorhome

08-30-2002, 10:18 PM	#2
RON WOODGEARD Resident Young Old Dude ! Join Date: Jul 2001 Location: Nevada Posts: 1,948	HARRY, Do you actually want to run 24 volts for cranking power?? It's hard on the starters. Or do you want to run 12 volts but hooked up to 2 batteries in parrellel?? It would stil be 12 volts but it would give greater cranking power in reserve. I ran this system on my off road truck, You only hook the second battery up (through a toggle and relay) when necessary. RON

08-30-2002, 10:18 PM	#3
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Then you do not want a 24 volt system. To do a 24 volt, you'd run them in series...neg on # 1 to ground, then pos on #1 to neg of #2 and pos on #2 to starter and entire system. You want to run the in parallel circuit. Basicly pos to pos to starter, and neg to block, and neg to frame.



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