Penske 8100 Refresh

Rebuilding the Penske 8100 shock absorber with new seals for the Swift DB4 Formula Atlantic. They recently had the oil changed which is why it was reused. Video at 4x actual speed.

[@garyrush1568]

And there you have it. 2 Shocks 17 mins. Should only take 1 hour to do my 4.

[@HuntTam]

What’s the purpose of the white bushing/spacer… is it a droop limiter of sorts?
Great video

[@swiftdb4]

@@HuntTam yeah, just an easy way to set droop without changing the shaft itself. Ideally you would just have the right length shaft.

[@HuntTam]

@@swiftdb4our sports racer shocks (Not Penskes, but old Multimatics that are built nearly identically) have them too, but we believe we are droop limited in the rear so just removed them. Haven’t tested at an event yet. Coming from full size cars, I’ve never heard of intentionally droop limiting the rear shocks. Is your reason for needing them due to mechanical interference or for setup?

[@swiftdb4]

@@HuntTam these are the fronts and the car runs a zero droop setup in the front. Rear has about an inch of droop

[@hamburgerman187]

What's the purpose of the black tape process?

[@swiftdb4]

There is a sharp angle on the shaft, if I push the seal over it unprotected then the seal gets damaged.

[@hamburgerman187]

Thanks for the reply, I'm debating on sending my 8300s out or just front the tools and such for many more years of DIY rebuilds. What is the approx cost for all the tooling?@@swiftdb4

[@swiftdb4]

@@hamburgerman187 not much, it's about the same cost to get someone to rebuild them versus buying all the stuff and doing it yourself. Obviously it gets much cheaper the second time. Also comes in handy if you want to check or change the nitrogen pressure.