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  #161  
Old 06-14-2018, 09:05 PM
Lasakro Lasakro is offline
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I just hooked up the output of my coil to a full wave rectifier bridge rated for 4 amps. Open circuit I got 10VDC @ 1800 RPM and 31VDC @ 4600 RPM. Connected my 2 HiLight 18W LED's and they light nicely as I took several laps around my yard. Should have check loaded voltage. Kids will be happy. They do flicker a bit and thinking about installing a 1 Farad cap I've got laying around from my car audio days. I highly doubt this setup was designed to charge a battery on an engine that doesn't have a fixed governed speed like a genny, etc. When looking at DC/DC converters you have a catch 22 going on. We want a fixed voltage output which is between the input min and max. Might be able to cascade a boost with a buck but I'm not going there. Next: Governor removal on Sunday but no 18 lb springs.
  #162  
Old 06-14-2018, 10:30 PM
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Quote:
Originally Posted by Lasakro View Post
I just hooked up the output of my coil to a full wave rectifier bridge rated for 4 amps. Open circuit I got 10VDC @ 1800 RPM and 31VDC @ 4600 RPM. Connected my 2 HiLight 18W LED's and they light nicely as I took several laps around my yard. Should have check loaded voltage. Kids will be happy. They do flicker a bit and thinking about installing a 1 Farad cap I've got laying around from my car audio days. I highly doubt this setup was designed to charge a battery on an engine that doesn't have a fixed governed speed like a genny, etc. When looking at DC/DC converters you have a catch 22 going on. We want a fixed voltage output which is between the input min and max. Might be able to cascade a boost with a buck but I'm not going there. Next: Governor removal on Sunday but no 18 lb springs.
So you are going to run the leds directly from the rectifier?
They are ok with 30 -40 Volt input?
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  #163  
Old 06-14-2018, 11:30 PM
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So you are going to run the leds directly from the rectifier?
They are ok with 30 -40 Volt input?
Yes I ran them from the rectifier. The lights are rated 9-30VDC. Might be a problem once I hit 5K without the gov but I also need to check loaded voltage, probably a lot less. At $13.30 a set of lights no great loss.
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  #164  
Old 06-16-2018, 05:33 PM
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Volts across battery vs RPM
Shows with just the light and with the light and pump ON.

With no charging, battery was 13.55 Volts.
With no charging and the 18 watt light, across the battery read 13.05 Volts.
With no charging and the (1 amp) fuel pump PLUS the 18 watt light, across the battery read 12.9 Volts.

Then I started the engine and ran at a few different RPMs.
Checked with BOTH Pump AND Light ON.
Then Checked with just the Light ON, Pump OFF.

You can see around 3600 RPM, the voltage is around 14.2- 14.4. Like somebody thought about it.
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  #165  
Old 06-18-2018, 07:55 PM
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Just to reiterate my flywheel has 2 magnets on the inside and I have 2 coils with 2 wires coming out:

Quote:
Originally Posted by Lasakro View Post
I just hooked up the output of my coil to a full wave rectifier bridge rated for 4 amps. Open circuit I got 10VDC @ 1800 RPM and 31VDC @ 4600 RPM. Connected my 2 HiLight 18W LED's and they light nicely as I took several laps around my yard. Should have check loaded voltage.
After that post I checked my DC "rippled" voltage from my rectifier loaded to 36 watts. 5.5 VDC @ Idle and 20VDC @ 4500 RPM.

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Originally Posted by bob58o View Post
So you are going to run the leds directly from the rectifier?
They are ok with 30 -40 Volt input?
So 30 VDC was at 4500 RPM unloaded, never saw 40. Loaded to 36W is now 20 VDC. Well within the upper range and I was surprised on how well they ran on 5.5 VDC with lights rated for 9 VDC min.

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Originally Posted by bob58o View Post
You can see around 3600 RPM, the voltage is around 14.2- 14.4. Like somebody thought about it.
Bob, I reread the first 3 pages of this thread and still couldn't figure out what you settled on. It's probably in your engine build tread but anybody doing a search on Predator lighting is going to find this tread first, probably. The graph above shows 13-13.5 @ idle compared to my 5.5. Do you have only 2 magnets inside the flywheel? One coil with 1 wire or 2 coils with 2 wires? Sorry for beating this horse, it's almost dead. I'm thinking you have a higher voltage charging coil intended to be used with a battery for infrequent use (starter, clutch,etc) where I have a higher current lighting coil intended for continuous use (headlight).

My 1 farad cap I was going to try is only rated for 20 VDC so I have to buy one. This is a must do for me as I read LED lifespan is greatly diminished by high ripple current. 1/2 farad will reduce ripple voltage to .13 volts at 60 Hz (3600 RPM). That will be pretty smooth.

V ripple= ((Current * Period) / Capacitance)
  #166  
Old 07-12-2018, 07:49 PM
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Quote:
Originally Posted by Lasakro View Post
J
Bob, I reread the first 3 pages of this thread and still couldn't figure out what you settled on. It's probably in your engine build tread but anybody doing a search on Predator lighting is going to find this tread first, probably. The graph above shows 13-13.5 @ idle compared to my 5.5. Do you have only 2 magnets inside the flywheel? One coil with 1 wire or 2 coils with 2 wires? Sorry for beating this horse, it's almost dead. I'm thinking you have a higher voltage charging coil intended to be used with a battery for infrequent use (starter, clutch,etc) where I have a higher current lighting coil intended for continuous use (headlight).
I got the parts for the Kohler CH270 3 AMP System. There is also a CH270 10 AMP System.

Here is the flywheel and here is the stator.
There is a diode in the wire coming from the Honda Clone Keybox that I used for half wave rectification. The AC Voltage I measured earlier in testing was the output of the stator wire (no diode).

3 magnets (on the inside).
2 coils.
1 wire.
And a Partridge in a Pear-Tree.

So I guess my coils are wired in series? Providing Higher Voltage?
Where yours may be wired in Parallel? Providing Higher Current?
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flywheelk.jpg   statork.gif  

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  #167  
Old 07-12-2018, 07:55 PM
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I thought push button start would be cool.
How about remote push button start? That would be something.
https://www.amazon.com/Solidremote-1...P7W63HNX61HCGG

What could ever go wrong with that?



Bob: "Hey guys, look out the window!!!"

Guys: "Where is you minibike going?"
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  #168  
Old 07-22-2018, 11:26 PM
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@Bob sir thank you for all this information. Unfortunately after reading it all and trying to comprehend what I read
My brain is fried.

No but really I could only grasp about 47% of the material so I imagine this is going to be a great under taking on my part.

Wish me luck
  #169  
Old 07-23-2018, 08:49 AM
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You can take a clone flywheel and the coils and mount them on a predator. I've never tried the hemi, I don't own one.
Is it a 100% match? I don't know, but after sliding onto the key in the keyway, and torquing down to 65-70 FT lbs, it's not going anywhere, and doesn't wobble or anything.
Would I run it at 10,000 rpms? maybe not, But I will tell you it's just fine for everyday normal use.
I've done it for years now.
I don't care what the experts say, it works.
  #170  
Old 07-23-2018, 10:46 AM
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The clone flywheel will not work on a hemi, but has been proven to work on non-hemis, even though the flywheels are supposedly slightly different. I've heard many people say that they haven't had any issues running a clone flywheel on a non-hemi predator. ARC says the taper is slightly different but have still said that many people have run without issues, but claim that some have had issues running a clone flywheel on a non-hemi.

---------- Post added at 11:42 AM ---------- Previous post was at 11:37 AM ----------

Quote:
Originally Posted by SimpleNoob View Post
@Bob sir thank you for all this information. Unfortunately after reading it all and trying to comprehend what I read

No but really I could only grasp about 47% of the material so I imagine this is going to be a great under taking on my part.

Wish me luck
Ask me questions if you want. You can ask in this thread. Unfortunately google points a lot of people to this thread and it would be nice to be able to clear some of this mess up so this thread might actually help people.

The questions most people have is about the output of their coil and how to rectify/regulate it. The things I don't know much about are the types of coils, their outputs, and how to rectify / regulate them. LOL

---------- Post added at 11:46 AM ---------- Previous post was at 11:42 AM ----------

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My brain is fried.
That makes two of us.
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