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12v conversion question


 
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PostPosted: Fri Jun 15, 2007 5:31 pm    Post subject: 12v conversion question Reply to specific post Reply with quote

I am converting my '51 8n to 12v. I have the parts on the way to rebuild my GM 12si alternator and make it 1 wire hookup. Got all parts from eBay store for 29.50 shipped. Gonna custom build the mounts myself seeing as I have the equipment and materials do to so. Question is this. Can I use my stock ammeter on the 12v or do I need a new one that will read more than 10A? I'm not sure if mine even works right. Doesn't show that it charges...but that could be genny or v-reg bad too...hence the conversion. All advice welcome.
 
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Dunk
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PostPosted: Fri Jun 15, 2007 5:39 pm    Post subject: Re: 12v conversion question Reply to specific post Reply with quote

Now you have confused me...

I thought mine was original with the loop, and it has 30 amps, 49 8N *236763*.

Would you also believe that I have a "built special for me" (by my local alternator shop) 6 volt positive ground, one wire, Chevy alternator, it cost me my alternator, and $65.
 
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PostPosted: Fri Jun 15, 2007 5:43 pm    Post subject: Re: 12v conversion question Reply to specific post Reply with quote

You may be right about the ammeter...never paid it much attention since it doesn't seem to work...good deal on the 6v alternator. My dad gave me the alternator to get rebuild at an auto electric shop...I said pffft with giving them 60 bucks for the $15 in parts needed for the alternator. I got the 1 wire conversion/rebuild kit and the 12v internally resisted coil for $30 shipped....I'm a bit of a tight wad when it comes to stuff like this Wink
 
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PostPosted: Fri Jun 15, 2007 5:49 pm    Post subject: Re: 12v conversion question Reply to specific post Reply with quote

You might get away with it if the shunt bar does not overheat and burn off. A meter of atleast 30-60 amps would be closer to matching the alternator output.
Does the 1 wire kit say what amperage output your alternator will have when converted ? and does it include a new stator ? The stator is the part of a 10-12SI Delco alternator that determines how many amps it puts out. You really want a small 37 amp stator in your 1 wire alternator. 37 amps is still several times more than what the original generator put out, so is more than up to the job. On a slow turning tractor engine, the smaller stator will start charging at usually 1/2 the rpm it takes to "excite " 1 wire alternator with a large 61 or 72 amp stator.

If your 1 wire alternator needs more rpm to start charging than your tractor can produce, or you are comfortable with, nothing is lost. You can get the auto parts store replacement alternator plug, a diode,resistor or charge light and connect your 1 wire alternator as a 3 wire unit. The 1 wire parts will function exactly the same as a stock 3 wire unit and give you the option of a simple to wire "1 wire unit, or as a three wire if a lower excite rpm is desired or you want a charge light indicator.
 
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souNdguy
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PostPosted: Fri Jun 15, 2007 9:59 pm    Post subject: Re: 12v conversion question Reply to specific post Reply with quote

30$ for a 12v coil? If this is a sidemount job you got taken to the cleaners. That's a 15$ coil available at napa.. 12v.. native.. no resistor needed.. no internal resistor either..

IC14SB napa part number..


Soundguy
 
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Anonymous
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PostPosted: Sat Jun 16, 2007 10:39 am    Post subject: Re: 12v conversion question Reply to specific post Reply with quote

Soundguy, got the coil for 9.95 and the alt kit for 12.95 with 6.40 total shipping.
 
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PostPosted: Sat Jun 16, 2007 10:43 am    Post subject: Re: 12v conversion question Reply to specific post Reply with quote

Jon...Got the alternator off of a forklift that has a governed engine...I feel sure that it will be ok since they turn about the same RPMs as the N engine. Thanks for the advice!
 
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PostPosted: Sun Jun 17, 2007 8:07 pm    Post subject: Re: 12v conversion question Reply to specific post Reply with quote

Jon, thank you so much for your post. When I did my conversion several yoears ago, I steered clear of the 1 wire job because of all the posts citing difficulty getting the alternatore to self-excite at less than W.O.T. So it's all a question of amperage, huh? Good to know since I may be doing a 12v conversion on a neighbor's Allis D-14 this summer.
 
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PostPosted: Sun Jun 17, 2007 8:27 pm    Post subject: Re: 12v conversion question Reply to specific post Reply with quote

Less than 30 bucks, with shipping, seems like a pretty good deal for an alternator rebuild kit complete with one wire regulator... It costs me about $15 just for gas to drive to town and back these days... We musta been reading two different posts, though, cause I don't recall reading ANYTHING about the coil... Thanks for that part#, though, because the employees at the NAPA stores nearest me are the best help minimum wage can buy. They are almost smart enough to feed themselves,and that's about it. The same cheap basturd owns about 6 franchises in the area, and as soon as they learn to read a parts book they can go almost anywhere else for a $2/hr raise.
 
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souNdguy
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PostPosted: Mon Jun 18, 2007 4:42 am    Post subject: Re: 12v conversion question Reply to specific post Reply with quote

I thought he had said the 30$ was just the coil. On a re-read i see it is the coil and the alt kit.. which ain't bad. But his message DOES mention a coil.. it is just on a line after the alt rebuild kit stuff.

i agree.. most of the sales people ( not just napa ) in the town that I live are just above the point of slobbering on themselves.

I needed to buy my wife a new pda.. but needed a specific software package for it.. went to one store.. they had the pda.. but couldn't tell me about the software.. so i went to the next store where they informed me the software I wanted was bundled with the pda.. so.. 1st store lost out on about 300$ worth of sales.. because they hire stupid sales people...

Soundguy
 
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