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Old 11-01-2004, 06:14 AM   #1
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Default CVD or Universal, which is better?

Anybody cluey on this?
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Old 11-01-2004, 06:53 AM   #2
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This is kinda a trick question. Universals/dogbones will free up a car and cvd's will tightened a car up a little. On my b4 I switch between the 2 often depending on the dryness of the track. You can definatly tell a difference. I am usually fighting a push when I have the cvd's in.
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Old 11-01-2004, 07:44 AM   #3
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I have a Losi car with CVD's and my understanding was that uni's created more side bite and better rough track handling. I have been fighting push just like you described.
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Old 11-01-2004, 07:45 AM   #4
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BTW Kingjz. package is in the mail.
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Old 11-01-2004, 12:12 PM   #5
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Davidka hit the nail on the head.

CVD's create more bind and therefore will square up faster and provide more forward bite.
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Old 11-01-2004, 02:36 PM   #6
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Aaron, does anyone know why the Uni's and CVD's react differently? They are fundamentally the same design with the exception if one of the two roll pins being larger diameter in the case of the CVDs.
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Old 11-01-2004, 03:25 PM   #7
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I believe it has more to do with the materials used and the amount of contact the individual parts have with each other. Whereas a yoke is only riding on two small portions of a pin, a CVD's joint is the entire ball-and-socket (kinda like the human shoulder).
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Old 11-01-2004, 03:43 PM   #8
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Yeah but the ball doesn't actually touch anything, I guess the secret is in the materials... It would be interesting to bring back the old telescoping drive shafts that losi used back in the day. (Get a look at an old JRX2 and you'll see what I mean)
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Old 11-01-2004, 03:51 PM   #9
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Those sliders are still around..they're even more free than dogbones, and going from dogbones to sliders have the same effect as going from CVD's to dogbones.

Dirt easily works its way into the ball-and-socket on the CVD.
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Old 11-03-2004, 12:31 PM   #10
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Oh yeah... Haven't had that happen to me yet. Is there a way to put sliders on the current bk2 tranny? That would be neat to try.
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Old 11-03-2004, 12:34 PM   #11
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The dog bones can slide on both ends and CVD's try to run straight when power is applied.
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Old 11-03-2004, 08:33 PM   #12
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I want maximum power at the wheels, so out of dogbones, CVD's and Universals, which is the most efficient?
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Old 11-04-2004, 09:32 AM   #13
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From what I understand.....

Dogbones aren't all that efficient simply because if you have too much down travel, I've heard of the shaft actually falling out of the drive cups. But Dogbones offer the most side traction. This is because there is no joint that straightens out under power.

CVD's will make the rear end square up very quickly so when you're on power coming through a turn, they will make the car want to go straight....rather than carving through like they should. So more foward traction, but less side traction. Their design gives the most go power, but if the pin that holds the whole CVD joint together falls out, the entire thing is gone.

Universals offer great side bite and foward traction. They are a great inbetween of the Dogbones and CVD's. The joint doesn't have all the buisness of a CVD and far more efficient than a dogbone.

If you want just GO power, than the CVD's are your best ben....if you want to turn like none other, then Dogbones....and if you want the best of both worlds, then universals.

I run universals on all my cars.

Again, this is just my understanding of the great shaft debate.
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Old 11-04-2004, 05:45 PM   #14
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David - I'm pretty sure you can use the old ones..
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Old 11-04-2004, 06:53 PM   #15
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Thanks a lot for your help,

I think i will go with Universals, but at $45 a pair it's a little steep for a basic RTR type car .

I'm trying to install universal parts on my car, so when i get something better (RC10GT FT), i can use most of my old hop ups.
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