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DC or AC CDI?
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Author:  Hogwild [ Fri Aug 24, 2012 2:45 pm ]
Post subject:  DC or AC CDI?

Okay fellas. I got the hammerhead running. I switched out the blown 150cc engine with another from a scooter. I didnt have spark for the longest time. Once I moved the old stator from the blown engine into the scooter engine, it worked. I bought a dc cdi but when I hook it up, I lose spark. Thats the issue I have now. I want to add a no rev cdi and leds to the buggy. I dont want to end up ordering parts I cannot use. If it turns out that this buggy is an ac unit, how can I run LEDS and how can I determine if its DC or AC?

Author:  kid4life [ Fri Aug 24, 2012 3:24 pm ]
Post subject:  Re: DC or AC CDI?

with buggies, the easiest way to determine AC or DC is to turn the key on and turn the lights on. if they come on, it's a DC system. If you need to have the buggy running to get the lights to work then it's an AC system.

hope that helps.

Author:  PGH [ Fri Aug 24, 2012 3:38 pm ]
Post subject:  Re: DC or AC CDI?

If the red/black lead is being used off the stator, it is an AC powered CDI. If still in doubt, measure the voltage for AC or DC output at the CDI power pin while cranking the engine.

Author:  Hogwild [ Fri Aug 24, 2012 3:48 pm ]
Post subject:  Re: DC or AC CDI?

kid4life wrote:
with buggies, the easiest way to determine AC or DC is to turn the key on and turn the lights on. if they come on, it's a DC system. If you need to have the buggy running to get the lights to work then it's an AC system.

hope that helps.


Yeah, problem being is this thing was a basket case. No lights to begin with. Actually there was one light but no wires to or from the stator or battery. I'm fairly sure its an AC system from what little research I've done on the plugs. I imagine its safe to wire leds directly to the battery with an inline fuse.

Author:  PGH [ Fri Aug 24, 2012 3:53 pm ]
Post subject:  Re: DC or AC CDI?

The small 4-pin rectifier only puts out enough DC to keep the battery charged. If you plan to run a constant DC load (LED lights), use the larger rectifier off a 250cc buggy that uses two pigtails.

Author:  Hogwild [ Fri Aug 24, 2012 4:14 pm ]
Post subject:  Re: DC or AC CDI?

PGH wrote:
The small 4-pin rectifier only puts out enough DC to keep the battery charged. If you plan to run a constant DC load (LED lights), use the larger rectifier off a 250cc buggy that uses two pigtails.


Will the stock harness still plug into the 250cc rectifier or will I need to rewire everything? Would it not be better to upgrade to an 11 pole stator?

Author:  BIGE [ Fri Aug 24, 2012 4:25 pm ]
Post subject:  Re: DC or AC CDI?

the hammerheads are dc fired cdi, so when you plug in the harness from the stator to the harness on the buggy you should still have a dc system. the black wire with the red stripe is not used on the hammerhead harness

Author:  PGH [ Fri Aug 24, 2012 4:38 pm ]
Post subject:  Re: DC or AC CDI?

You will need to rewire the rectifier plugs since they do not match - Buggy Depot does have an adapter cable that does what you need if you are not comfortable with rewiring. Whether you upgrade stators depends on how much electrical load you plan to run. If you keep your total load under 75w (6A), a 6-pole stator will handle it. The 250cc rectifier allows for up to three phases of AC input. Only the 11-pole GY6 stator has three, but 2-phase 6-pole and 8-pole stators will work fine with the upgraded rectifier.

BTW: Most scooters have an 8-pole stator capable of over 100w (8A), so you may have enough capacity for what you need. There is no way to check if you eight poles or six without pulling the flywheel and counting the windings.

Author:  Hogwild [ Sat Aug 25, 2012 2:51 pm ]
Post subject:  Re: DC or AC CDI?

PGH wrote:
You will need to rewire the rectifier plugs since they do not match - Buggy Depot does have an adapter cable that does what you need if you are not comfortable with rewiring. Whether you upgrade stators depends on how much electrical load you plan to run. If you keep your total load under 75w (6A), a 6-pole stator will handle it. The 250cc rectifier allows for up to three phases of AC input. Only the 11-pole GY6 stator has three, but 2-phase 6-pole and 8-pole stators will work fine with the upgraded rectifier.

BTW: Most scooters have an 8-pole stator capable of over 100w (8A), so you may have enough capacity for what you need. There is no way to check if you eight poles or six without pulling the flywheel and counting the windings.


Well I had bought a scooter engine to replace the blown hammerhead engine. Couldnt get spark to save my life until I put the original hammerhead stator into the buggy. I thought I had purchased a dc powered cdi but whenever I hook it up, I lose spark. That being said, the scooter motor (supposedly in great condition) is smoking like a freight train. Just ordered a 155cc piston from Mike at BuggypartsNW. Hoping I wont have too hard of a time doing the work. Also having issues with brakes atm. Just tried the reverse bleed with syringe trick, it filled the reservoir but still no brakes or reverse. Just one thing after another.

Author:  BIGE [ Sat Aug 25, 2012 4:19 pm ]
Post subject:  Re: DC or AC CDI?

do the rear brakes work? fronts?

Author:  Hogwild [ Sat Aug 25, 2012 7:38 pm ]
Post subject:  Re: DC or AC CDI?

BIGE wrote:
do the rear brakes work? fronts?



Nada. So far on the test runs, I've managed to stop with the head on assistance of my dodge and a steep ditch. Lol. Not real sure what's keeping the brakes from engaging. That being said, I'm actually heading out to buy a gk13b now with a chewed reverse gear or something. Too many buggies that aren't running.

Author:  BIGE [ Sun Aug 26, 2012 8:52 am ]
Post subject:  Re: DC or AC CDI?

check the calipers to make sure the pistons are moving, then bleed them and replace the pads if they need it

Author:  sevenwolverine21 [ Sun Feb 04, 2018 10:35 pm ]
Post subject:  Re: DC or AC CDI?

on your brakes make sure the pin/adj bolt on your brake pedel is properly adjusted lightly touch the master cylinder then back off a quarter turn better loose than tight make sure by bleeding the brakes you know fluid is actually being pumped through to the caliper then watch if the piston is being forced out you should not be able to turn the wheel

Author:  WETSU [ Mon Feb 05, 2018 7:23 pm ]
Post subject:  Re: DC or AC CDI?

I hate to be the bearer of more bad news for you...., BUT that's why I am here :D ! Unless you live in a flat part of Ar.,and don't need to worry about climbing any hills. You are going to want/need to change out those scooter gears for buggy gears. Great top end,very bad low end.

Author:  gndoc [ Tue Feb 06, 2018 4:45 pm ]
Post subject:  Re: DC or AC CDI?

WETSU wrote:
I hate to be the bearer of more bad news for you...., BUT that's why I am here :D ! Unless you live in a flat part of Ar.,and don't need to worry about climbing any hills. You are going to want/need to change out those scooter gears for buggy gears. Great top end,very bad low end.


2012 was a great year and the year of this original post, but there is a good piece of info about the ac or dc cdi check.

Author:  Sockman [ Tue Feb 06, 2018 6:46 pm ]
Post subject:  Re: DC or AC CDI?

Image

Author:  WETSU [ Thu Feb 08, 2018 12:30 am ]
Post subject:  Re: DC or AC CDI?

Sockman wrote:
Image


Gawd that made me pee alittle :lol: :lol: :lol: :lol: #-o #-o !!!!!!!!!!!!

Author:  the gokart kid [ Fri Feb 09, 2018 10:10 am ]
Post subject:  Re: DC or AC CDI?

Hopefully this helps a little bit?

Attachments:
acdc cdi.png
acdc cdi.png [ 154.46 KiB | Viewed 9000 times ]

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