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Post by stinger440 on Mar 5, 2013 8:56:31 GMT -5
Anyone ever use a more available cdi box to replace the cuyuna cdi when it goes bad? Looks like a few arctic cats used a similar box and coil setup, the main harness is a tad different. Why I'm not sure but I would think a look over a wiring diagram will tell the story. Hopefully someone has done this  |
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Post by pararailer on Mar 10, 2013 17:24:21 GMT -5
how much do they cost compared to a correct one?
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Post by stinger440 on Mar 11, 2013 8:53:52 GMT -5
Not sure about cost. I just know I can go down to the local salvage yard and pick up a cdi from any of the big 4 at any time. Ask for a cuyuna cdi and get the  |
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Post by stinger440 on Mar 12, 2013 6:20:33 GMT -5
2 more quick questions. I have a CDI style cuyuna on the bench. I have no main wiring harness, just the coil cdi box and engine. How do I check for spark with a normally closed ignition? Also does anyone know the resistance values for the stator?
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Post by scorp11 on Mar 12, 2013 14:25:12 GMT -5
I don't have an answer for you on this, but it would be good to find an alternative for several reasons.
1. The nippendenso CDI boxes weren't that reliable over time. Probably were fine originally but after sitting in all kinds of conditions for 30+ years they are prone to failure.
2. They are getting hard to find replacements. I have been hoarding 3 NOS sno-stuff boxes in case I ever get my CDI motor together to run for that reason.
The cuyuna's did go to a kokusan ignition later on the ultralight motors and they were much more reliable over time. But, I don't know if the timing curve was the same. The later ultralight motors were detuned significantly from the snowmobile engines, but I don't know if they changed the timing curve too.
Plus, the 80 Stings (only ones that used CDI) had all that Cat "is the throttle stuck wide open" switch stuff on it and it was notoriously problematic and hard to diagnose.
I don't think any of the Cat style will mount right up and you'd have to know the timing curve is right before doing that. That SheWelt guy from Vintage Sleds can probably shed more light on it. I should ping him and see what he knows. He reproduces CDI boxes for various makes.
In reality, there is really nothing wrong with the points setup in these, and they are very reliable. Just hard to get bosch points. The CDI should give a little better top end, which would be a plus at times.
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Post by stinger440 on Mar 12, 2013 15:20:14 GMT -5
I have no problem with the points engines. The no spark CDI issue is the reason I put an Indy 500 liquid into my 80 sting. Now I have this engine sitting there that I can't do anything with. Might just tear it apart and use it for parts.
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Post by obj1 on Mar 12, 2013 19:11:07 GMT -5
Hold on there stinger440, i always wanted a cuyuna engine. Dont take it apart, i'd never get it back together. I'll just come and get it.
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Post by scorp11 on Mar 12, 2013 23:35:48 GMT -5
Well, I wouldn't go making pieces out of it quite yet. It is really pretty easy to convert it to a points engine if you still wanted a cuyuna. Coils / Stator and fan housing is all you need to make it a Points motor. You can proabably use the CDI fan housing if you really wanted to, but the way the bolts hold it to the motor are a little different. Or sell it to obj1 for big bucks ;D I could use some extra CDI motor parts if I am going to build one  |
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Post by stinger440 on Mar 13, 2013 7:04:41 GMT -5
You guys are pretty funny. This is not the only cuyuna in my arsenal, the only CDI ignition though. I may just convert it over to a points engine. I have all the parts for that. Or I may do some experimenting with some other ignitions.
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Post by obj1 on Mar 13, 2013 12:45:51 GMT -5
Arsenal, heck i'd be happy with just one! You guys get all the good stuff.
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Post by scorp11 on Mar 13, 2013 16:19:26 GMT -5
Arsenal . . . well if your building an arsenal, you better have a CDI in it :-)
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Post by stinger440 on Mar 14, 2013 8:17:55 GMT -5
I'm just trying to catch up to your cuyuna piston count.  |
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Post by scorp11 on Mar 30, 2013 18:28:38 GMT -5
I may have found some replacement CDI boxes for the Cuyuna's. Not old stock or old Nippendenso style, but newer manufactured ones. They are just starting to be used. I know someone who got one to try on an 80 Sting, so I'll find out how they might work.
At what price point do people think they'd buy a new CDI box ?
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Post by stinger440 on Apr 1, 2013 7:43:10 GMT -5
I probably wouldn't pay over a hundo, especially since I'm still not sure the CDI box on my engine is the actual problem.
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Post by scorp11 on Apr 3, 2013 0:21:11 GMT -5
I probably wouldn't pay over a hundo, especially since I'm still not sure the CDI box on my engine is the actual problem. I know I can't get them for that. I guess I was talking in terms of someone needing a CDI box. Before I tried to negotiate a better price, I'd have to have some idea I could actually sell them. Right now they'd cost $120 each. |
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Post by stinger440 on Apr 3, 2013 8:58:16 GMT -5
If I was 100% sure it was my CDI I would buy one for $120.
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Post by speedbuff on Nov 9, 2013 22:47:10 GMT -5
did anyone ever figure out how the new cdi's worked?
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Post by ddub on Nov 10, 2013 8:04:51 GMT -5
Arsenal, heck i'd be happy with just one! You guys get all the good stuff. Tom, Talk to Roger, he has a NOS CDI engine sitting in his shop.  Is he holding out on you? ;D |
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Post by scorp11 on Nov 10, 2013 15:00:55 GMT -5
did anyone ever figure out how the new cdi's worked? It isn't winter yet Once we get ridable snow, I will ask the guy who bought one. He will be able to speak to how the work functionally, but not the durability unless you want to wait a few years |
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Post by obj1 on Nov 11, 2013 19:05:57 GMT -5
Nope, he didnt hold out on me. He and I always wanted a nice cuyuna single so after a trip to the band saw now we each have a nos single cdi cuyuna!
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