I have seen the rpm pistons. you can use them as they state in the instructions to give more damping on the bound stroke and less on the rebound. this will help out on landings from big jumps. It will not improve handling though.
Fitted up side down it would act like typical low speed damping on a full sized car shock.
""It's a statement, the question mark was in case I had picked up the wrong end of the stick and you had meant a difference in the car speed or something like that.
Any r/c shock out there reacts differently in high speed and low speed damping due to the laminar and turbulent flow of the oil. ""
Yes, of course. the flow of oil passing through an aperture at different speeds has different reactions.
Take for example a B4 shock, or even a Tamiya Hotshot shock absorber which has a valve in it.. its all low speed damping.
Please take a look at the link to understand better the term high and low speed damping.
http://www.blackartdesigns.com/id4.html