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RC10B4/T4 Forum

Old 07-26-2010, 08:47 AM
  #13171  
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Originally Posted by Jmuck69 View Post
I have read that the CVA* helps square the car up out of corners and the CVD* helps keep the suspension active and doesn't lock it. Is this true, and if so this could be another tuning aid.



You got it, but the opposite or the other way around of what you said...
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Old 07-26-2010, 09:35 AM
  #13172  
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Are the CVA's a different joint? Anyone have a link to a photo?
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Old 07-26-2010, 09:37 AM
  #13173  
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Yes , CVA is way different Dave ...

CVD Barrel for pivot on axle

CDA Barrel for pivot on the dog bone

CVA Binds more than CVD

Picture of a CVA bone
Attached Thumbnails RC10B4/T4 Forum-cva.png  

Last edited by Wild Cherry; 07-26-2010 at 09:52 AM.
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Old 07-26-2010, 09:41 AM
  #13174  
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yup, shocks are fresh and im running on indoor clay here in sothern CA (westcoast, ocrc, lrh). thanks for the tips... i'll try those out first


Originally Posted by Eli View Post
maybe go up 2.5w on rear shock oil. but may have to much adverse affects. you may want to add weight to the lipo if youre running lipo before you go getting all frustrated. im running a strip of thin lead down middle approx. 70 grams and then i have 14 grams (2 7gram thin pieces of lead) on front and back of battery. Using check point 3800 so it fits exactly in the middle of battery compartment.
My car is pretty planted on the track
R u running indoor clay track?


oh yeah, make sure youre ride height is set correctly 24mm from bottom of trans and 24mm right behind bumper. and your shocks are fresh right?
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Old 07-26-2010, 09:58 AM
  #13175  
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Originally Posted by Wild Cherry View Post
Yes , CVA is way different Dave ...

CVD Barrel for pivot on axle

CDA Barrel for pivot on the dog bone

CVA Binds more than CVD

Picture of a CVA bone
^^That will make no difference. The configuration and materials (I assume) of the pivot are the same so the amount of the bind has to be the same as well. If the dogbone is aluminum (softer) then that would have an effect.

An upside I can see is that someone could make a boot for the CVA allowing it to cleanly retain lube. That would make a meaningful difference.
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Old 07-26-2010, 10:02 AM
  #13176  
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Dave ,



Where the pivot is located makes a huge difference...
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Old 07-26-2010, 10:53 AM
  #13177  
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Originally Posted by Wild Cherry View Post
Dave ,



Where the pivot is located makes a huge difference...
I don't believe that. Besides, the pivot isn't in a different place, it's connection is just reversed.

Why do you think it makes a difference?
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Old 07-26-2010, 11:25 AM
  #13178  
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Originally Posted by Davidka View Post

An upside I can see is that someone could make a boot for the CVA allowing it to cleanly retain lube. That would make a meaningful difference.
Tamiya did that on the Frog.
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Old 07-26-2010, 11:27 AM
  #13179  
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Originally Posted by Davidka View Post

Why do you think it makes a difference?


The way the joint spins on the car while the arm is moving up & down & the gyroscopic forces ...
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Old 07-26-2010, 11:56 AM
  #13180  
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Originally Posted by Wild Cherry View Post
The way the joint spins on the car while the arm is moving up & down & the gyroscopic forces ...
Unless the joint spins on a different axis (further inboard from the wheel for instance) then all of these forces would be the same.
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Old 07-26-2010, 12:02 PM
  #13181  
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Not the same Dave , sorry ...


A Clue


when you rotate a bent CVD gyro forces makes the joint straighten or flat ....

Last edited by Wild Cherry; 07-26-2010 at 12:21 PM.
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Old 07-26-2010, 01:35 PM
  #13182  
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Originally Posted by Wild Cherry View Post
Not the same Dave , sorry ...


A Clue


when you rotate a bent CVD gyro forces makes the joint straighten or flat ....
That happens to all universal joints, it's caused by friction, not gyroscopic forces (did you make that up? ). Given the barrell and pins are presumably the same size and same material, placed in the same location, the friction would be the same.

Does anyone actually know if there's a difference?
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Old 07-26-2010, 01:40 PM
  #13183  
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"I have no idea what you're talking about, so here's a bunny with a pancake on it's head."
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Old 07-26-2010, 02:11 PM
  #13184  
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Hey guys,

a 1mm shim gives 2 deg anti-squat? I have a 4.1 and want to know which rear toe config set up should I run, the 2deg or 3deg? The 2 deg should provide a "looser" feeling and better rotation, right?
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Old 07-26-2010, 03:02 PM
  #13185  
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The CVA has no handling difference from a CVD. The reason the CVA was used is because MIP has trademarked the CVD. The reason Ryan's setups show CVDs is because at the time that they were made we didn't have CVAs to run yet.


The 2* of rear toe will make the car looser and rotate more than the 3* of toe.
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