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Originally Posted by Shankenstein
It's a quite similar to my previous profession (oil & gas services). It only takes a few brilliant engineers, quality technicians, and a machine shop with top-notch capabilities... and the incremental performance becomes big $$'s.
Do you have any recommendations on choosing shim stacks for a VDP?
VDP feels like the "way of the future" since it allows for low-friction and street-friendly materials... but tuning seems like a nightmare. My best guess is that it requires a soft low-speed stack and a moderately stiff high-speed stack. I can't imagine a 1-stage solution working for all applications, since the piston face geometry is fixed.
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You hit the nail on the head. Penske customer support is unmatched and everyone copies the piston designs.
I'll get back to you with an educated answer on the VDPs. I've yet to develop a shock for a sports car that used a VDP but I know it's done. I will say the main piston design is very dependent on the track and situation. Usually we're looking to absorb bumps so you can attack corners so a progressive high speed curve is a bad idea. Our digressive/regressive performance is why we took the top 7 spots at the Tudor race at Sebring and top 5 in Continental Tire. Of course Sebring is uniquely bumpy.