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Old 04-07-2015, 11:40 PM
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Default vision racing shock pistons?

http://www.neobuggy.net/2015/04/07/vrp-motorcycle-inspired-x-pistons/#more-57109

thinking of trying this New pistons out...

Time will tell if they work
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Old 04-08-2015, 05:08 AM
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there have been alot of local and factory drivers that are running these. They have worked well in 1/10th and 1/8th scale
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Old 04-08-2015, 03:33 PM
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These are very interesting. More or less what real racing 2way shock dampening is like. What would be really cool is if those clicker shocks that CSI made adjusted the dampening instead of preload. That would change the rc world. Then i would buy a set!
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Old 04-20-2015, 02:34 AM
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Has anyone tried these yet?
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Old 04-24-2015, 11:39 AM
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Originally Posted by segreda View Post
http://www.neobuggy.net/2015/04/07/vrp-motorcycle-inspired-x-pistons/#more-57109

thinking of trying this New pistons out...

Time will tell if they work
I just ordered these for my mugen , have you tried them yet ??
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Old 04-30-2015, 08:49 PM
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Any one tried these? Any thoughts?
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Old 04-30-2015, 09:37 PM
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--- Edit ---
My original post had a description of test results from a type of piston I mistakenly misidentified and compared to the VRP piston. I've removed that comparison to avoid confusion... Thanks for pointing that out masher81.

------

In case you are curious, I've published the results of my dyno testing where you can download. (for free of course, I'm just doing this for fun and to help educate drivers about different shock setups). This is just dyno data. There is not yet a setup guide, so use it for what you can to help with your setup decisions.

https://sites.google.com/site/rccarengineering/home

cheers

Last edited by icecyc1; 06-15-2015 at 08:29 PM. Reason: Removing an incomparable description
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Old 04-30-2015, 11:04 PM
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Interesting mate
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Old 05-03-2015, 09:33 AM
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I've tried these on two astro covered tracks that had small high frequency bumps.
I'm using the D812 shocks with 6x1.3mm pistons which are our standard piston to use.
Using 450cps front and 300cps rear the car would not handle these small "pitter patter" bumps very well causing the car to be hard to drive consistently.
Changing to the vision racing 6x1.3mm pistons with the same oils (ambient temp same) made a massive difference.
Previously where you could see the car struggling to keep its wheels in contact with the ground and skipping over the "pitter patter", the car felt much more in contact with the track surface and you could not see the car skipping over the bumps making the car much easier to drive.
Damping over jumps and general handling seemed to be very similar to the standard piston first tried. This might be the exact case of "Piston Slop" as mentioned above, working well for the track conditions.
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Old 06-14-2015, 09:31 PM
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I purchased a set of 5H 1.3mm VRP pistons and I put them on my shock dyno. I feel the results are impressive with how smooth and true they are to the claim they are like the stock 5H1.3mm pistons in compression, but with less rebound force. The back to back test on the dyno (same oil - 450cst, same velocity - 200mm/s) shows the compression side to be virtually identical to stock piston, and the rebound to be about 17-23% less than the stock piston. It also shows zero piston slop (like I mistakenly compared to a two stage piston I tested). These are not two stage pistons, but are a valved piston, so the behavior is very different.

These definitely provide less rebound force than compression damping force, so it is equivalent to running a lighter oil in rebound than damping. "Roughly"... about 100cSt or so lighter.
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Old 06-15-2015, 12:14 AM
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I ran the Pistons at a race last week. Car felt really good. Am gonna try it some more. So far so good.
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Old 06-15-2015, 09:51 AM
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I am running these in my MBX7R ECO and they are performing really well. The car is more settled landing jumps and there are no real crazy shock oil weights that are necessary. For the most part, I am running what I would be with the stock pistons (temperature variances of course).
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Old 06-15-2015, 10:07 AM
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How many/what size holes are you running, Spads?
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Old 06-15-2015, 10:28 AM
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Originally Posted by icecyc1 View Post


I purchased a set of 5H 1.3mm VRP pistons and I put them on my shock dyno. I feel the results are impressive with how smooth and true they are to the claim they are like the stock 5H1.3mm pistons in compression, but with less rebound force. The back to back test on the dyno (same oil - 450cst, same velocity - 200mm/s) shows the compression side to be virtually identical to stock piston, and the rebound to be about 17-23% less than the stock piston. It also shows zero piston slop (like I mistakenly compared to a two stage piston I tested). These are not two stage pistons, but are a valved piston, so the behavior is very different.

These definitely provide less rebound force than compression damping force, so it is equivalent to running a lighter oil in rebound than damping. "Roughly"... about 100cSt or so lighter.

Glad you tested the actual product and wrote your findings. Probably would be fair to edit/delete your earlier comment where you were asserting things with out correct information.
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Old 06-15-2015, 08:08 PM
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Originally Posted by frewster View Post
How many/what size holes are you running, Spads?
I'm running the 6 x 1.3 pistons on a medium track that is run fairly wet most race days. Track was allowed to groove up last race and my car was just plain settled.
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