shake
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Post by shake on Jan 27, 2014 12:50:04 GMT -5
How did it work out for you ?
I know for a fact I can run 2 for 24v to the starter motor .
While still pulling only 12v off one for ign and fuel pump.
Mostly wondering if anyone has messed around with it.
And how it worked out.
Realise that shorter starter life is a for sure
Paticularly interested in results on a SBC
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hemi1
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Post by hemi1 on Jan 27, 2014 12:53:51 GMT -5
Ran this setup for years in the past.Anymore tho if you buy a good big battery and a new mini starter it will usually turn it over plenty good with just 1 battery.The key is to make the engine never stall in a derby.
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Post by Comet Cyclone on Jan 27, 2014 12:55:11 GMT -5
yes.
burn out starters very fast on any of the new ones...
The old starters(late 50's,60's-70's)... I ran fords... they last forever especially the 6v starters on 24v lol...
The longer you crank them the better chance u have of burning them up.. a new starter can burn up after 2 starts...you need a Heavy wound starter that don't skimp on the gauge.
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shake
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Post by shake on Jan 27, 2014 13:00:33 GMT -5
Ran this setup for years in the past.Anymore tho if you buy a good big battery and a new mini starter it will usually turn it over plenty good with just 1 battery.The key is to make the engine never stall in a derby. Like a 4d cat bat hahaha... First I have heard about these mini starters was on here. Would like to know a bit more about them. Are they on bearings instead of bushings ? As for the stalling..If my advance was closer to where it should be..and I ran gears for a small block lol Instead of the hi way gears outa that Buick...that had a 455 .... |
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Post by klicky96 on Jan 27, 2014 15:54:18 GMT -5
Question, why don't you just run a parallel series of two batteries? 24V on any new starter will(not 'can', will)ruin them quite quickly. Pushing way too much voltage to it. Its kinda like pushing too much amperage through a small wire, just burns it up. To show you as an experiment, if you have an old junk 6V lawnmower, hook a 12V battery to it and see how fast it reacts on the electrical system. I would just run two high cranking batteries in a parallel circuit and you'd be fine. Same setup as in a boat. I have a setup as to where I have a battery controller, so that, if they say I can only run one battery, I just turn the dial to that battery and go, or I can turn to both and run that. Very simple, and easily chargeable with a standard alternator. Plus, I don't see why anyone would need to run a 24V system in a derby car, whether its worth $10K or not.  |
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shake
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Post by shake on Jan 27, 2014 17:10:14 GMT -5
Reason I asked is because I think about what I'm up to.
I actualy enjoy thinking about how stuff works , how to fix it or make it do what I want ;-)
The good in this question is that someone that is un aware how to run 2 and have 12v .
Well you just showed them something that they might not have known :-)
I likely will stick to a bran new set of high cca batreys.
As I will put them in my trucks after the demo ;-)
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Post by blackmopar21 on Jan 27, 2014 18:30:31 GMT -5
People run two batteries all the time.
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shake
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Post by shake on Jan 27, 2014 19:08:02 GMT -5
People run two batteries all the time. Yep , I run no alternator..just one less part to smash or start a fire. But my box is built for a cat battrey. Presently I dont have one. Buying one is a waste when I can get 2 800cca battreys and run in my pickup after |
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Post by klicky96 on Jan 27, 2014 19:11:59 GMT -5
If it's much if a problem, I'd just get some scrap steel and start makin another box. That's what I'd do. I wouldn't try buying one offline or anything. I like my stuff homemade, that way, if it does break in a derby, I can blame it on myself instead of a company.
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T-Brell
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Post by T-Brell on Jan 27, 2014 19:29:17 GMT -5
People run two batteries all the time. I'm pretty sure most people hook the battery up in parallel like klicky's diagram...not in series to make 24v instead of 12v like the OP said. It's the first I've ever heard of this, but I wouldn't try it. double volts*same amount of amp draw=double watts. The windings are designed for a set amount of watts that normally takes to turn over an engine. Doubling it will create a lot of heat and they burn up... EDIT: I said that wrong, Double the volts with the same amount of resistance(the motor windings) doubles the current, which is what burns up the motor...it's been a while since school  |
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shake
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Post by shake on Jan 27, 2014 19:30:35 GMT -5
I can mod it to work.
I gutted an old cooler for a lid.
1/4 " plate for the bottom and 2x4 straps to hold down..no chance of that shorting out ;-)
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lincoln
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Post by lincoln on Jan 27, 2014 20:07:58 GMT -5
I'd just worry about tuning your engine so it never dies.
Then you only hafta start it 4 times.
Off the trailer, inspection line, heat race, feature. Can always charge it in between.
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Post by redneckracing12 on Jan 28, 2014 0:01:49 GMT -5
Im going to have to go with Lincoln on this. Personally iv never had a issue with the motor not turning over in the derby then again, my motors hardly ever shut off in the derby. the only time I had a issue is when all the oil blew out the dip stick tube and locked solid, thats the last time I ran a dip stick.
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Post by playtime16 on Jan 28, 2014 1:12:04 GMT -5
Ran 24 for a few years way back works good for the derby but gm starters cant take it youll be putting a starter in it every derby
two good batteries running 12v will last just fine for the most part
I considered a setup where I can change it quick just in case voltage is low at 12v switch it over and you got probably 18v left if it starts the car one more time its worth it could be the dif between first and second
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shake
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Post by shake on Jan 28, 2014 8:50:55 GMT -5
Ran 24 for a few years way back works good for the derby but gm starters cant take it youll be putting a starter in it every derby two good batteries running 12v will last just fine for the most part I considered a setup where I can change it quick just in case voltage is low at 12v switch it over and you got probably 18v left if it starts the car one more time its worth it could be the dif between first and second Now we are getting somewhere ;-) If they cant take it , then I will buy a new starter and run 2 @ 12v . Other idea is intriguing , but more is sometimes less in the reality of stuff to go wrong with a set up. Thats a few extra switches. I think I will install a high quality disconnect though, in the event of a cable shorting out |
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