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vision racing shock pistons?

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vision racing shock pistons?

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Old 11-02-2015, 07:16 PM
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http://www.amainhobbies.com/rc-cars-trucks/vrp-12mm-hot-bodies-d413-x-shock-piston-2-1.6mm-x-2-hole-vrp2h1.6hb/p450907
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Old 11-03-2015, 12:15 AM
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The white stuff is done kind of manufacturing excess I think. I found that stuff on a couple of steel spur gears as well. I agree the photos could be better. My pistons have been fine (white stuff included on some!)
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Old 11-03-2015, 12:28 AM
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Thanks for the link. Unfortunately when you zoom in so much to look at things, most of the time u will see things like this. The white stuff won't affect the performance of the pistons. Will still let VRP know abt yr feedback.
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Old 11-03-2015, 03:21 PM
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Crappy lighting, but you get the idea. The mbx7r ones I just got look real nice.



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Old 11-26-2015, 07:35 PM
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Had one crack in half 2nd race out this past weekend. Bummed as the car has been the best it has been with them.
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Old 11-26-2015, 08:54 PM
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Did u put a washer at the bottom and TOP of the piston?
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Old 11-26-2015, 11:39 PM
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@micrors4guy- I'm also curios what car it was in. I have many many races on mine in a D815 and have had no problems. Do you think it was a manufacturing defect, missing washers, excessively thick oil or something else?
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Old 11-27-2015, 06:28 AM
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I had to drill the center hole out just a little bit to get them to fit onto the piston... The hole on the VRP are maybe .05mm smaller than the stock mugen piston. Otherwise I would have had to force it on. If you had to force them on, I could see that maybe adding some stress to it helping it snap in half.
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Old 11-27-2015, 06:38 AM
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I would suggest sending them back to VRP the next time pistons don't fit rather than drilling them yrself or forcing them in. I'm sure we can check things out first.
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Old 11-27-2015, 08:52 AM
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First time I tested these few months ago on outdoor track with D413, I put them in wrong way and wondered why all the hype lol

Now I'm driving on indoor carpet and going to give new try, thus for the smooth indoor track I don't except nothing. Sure I can't wait for outdoor season and testing them out on my mugen.
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Old 11-27-2015, 10:44 AM
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Originally Posted by micrors4guy View Post
Had one crack in half 2nd race out this past weekend. Bummed as the car has been the best it has been with them.
Waiting to see if VRP replaces them or not...

Last edited by Socket; 11-27-2015 at 11:53 AM.
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Old 11-27-2015, 12:54 PM
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I had to bore the center out on mine too. A bit too snug, which can add stress if forced in. Also, make sure to tighten the nut holding the piston just snug. Over tightening it will warp the piston and potentially crack it also.
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Old 11-27-2015, 02:57 PM
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Good day I'm got the 5x1.5 for the rc8b3 what is a good starting point for rough hard pack track
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Old 11-27-2015, 03:45 PM
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Originally Posted by jose valadao View Post
Good day I'm got the 5x1.5 for the rc8b3 what is a good starting point for rough hard pack track
Use yr usual oils. If you are not sure, ask the guys at the track what oils they use.
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Old 11-29-2015, 11:32 AM
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Has anyone tried using some rebound in the shock with these Pistons?
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