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18 volts to start big 4 cy engines

W

wilson ind

Well-known Member
Yes slow night possibly one two many pain pills. Just reading on M-M site fellows discissing starting big pulling tractors. One mentioned hot rod mags selling 16 volt batteries. Heres my thought--- drum roll-- why not put one large 12 volt and one large 6 volt in series??? Tinker with voltage regulator spring to charge. I can just imigine buick&deere thinking wilson has lost it for sure this time!!
 
Why not two big 12's and make it 24 volt?

As much money as they spend on those things a 24 volt system shouldn't be that much of a problem. Doesn't a lot of military stuff use 24?

Gene
 
The 24 volt set up that GeneMO mentioned would be better. I know that many larger trucks have 24 volt systems. Even an F350 with a diesel has 24 volt starting system with two 12V batteries. So it would be easier to obtain the necessary parts.
 
24 volts work far better and if wired right you can charge them as a 12 volt unit but use 24 volts to start them like a lot of older big trucks used and the Military stuff does to a cheap alternator will work just fine but still have the kick of 24 volts
 
The miss-matched batteries would be a nightmare to charge and draw from, can't see how you get equal discharge.

Would need (3) 6 volt batts to do it your way & have good results, but the (2) 12's have been done so well might as well go with that?

--->Paul
 
If 24 volts were so good how come most of the trucks and the 4020 John Deeres were switched over to 12 volts using 3 or 4 twelve volt batteries hooked as 12 volts? Armand
 
I have an old military surplus air compressor with a 4 cylinder gasoline motor. 24 volts sure does a heck of a job spinning that starter. A single twelve volt battery won't get it around the block.
 
Why re-invent a tried and proven system with a cob job ?
Two 12 batteries s with a 24 start,12V run/charge relay and a 12V alternator.
Better yet just use one or two 1000CCA group 31 battery(s), 2/00 cables with good ends and a Delco 44MT starter?
 
few things i've often wondered about concerning starting systems,why use a 6 volt as it not much better than a hand crank,and what was the great gain of a 24 volt system other than expensive
 
Same reason 240V is preferred over 120V to operate an electric stove, water heater, shop air compressor, welder, well pump etc.
Same gains again with a 480V or 600V motor vs. a 208V motor.
 
Deere used a convoluted 12/24 system because of lawyers .
Delco already had a propitiatory deal with another large and competitive heavy equipment manufacture for a conventional 24V system.
 
Ford diesels are not 24V starting. They are 2 12v mounted hot to hot, ground to ground. Entire truck is 12V
AaronSEIA
 
I Put a series paralel switch on one of my tractors,starts now with 24 volts(two 12 v batts) on a 12 v starter.(charge stays 12 v)
Starter can handle it cause it starts now in a split second(faster turn over) where as prolonged starting before on just 12 v overheated the starter trying to get the engine to fire.
I wore out a starter a year on the orig 12v start.
I haven't replaced a starter since i converted to 24 v start 15 yrs ago.
 
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