Nice work on the website! Ne1 familiar with Erson "variable duration" lifters?

[84_GT350]

I dunno about the Erson variable duration lifters, but they should all work the same...with the same fundamentals. When at idle there won't be as much lift given by the lifters so you'll idle better with more vacuum. As the rpms increase so does the pressure in the lifters and you've got the full cam lift. That's a really crude description though...perhaps someone else can explain it better.

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1984 1/2 GT350 (#842 Hatchback w/ T-tops), 302HO, Comp cams Xtreme Energy cam, Carter 625cfm carb, Weiand Stealth intake, MSD distributor, MSD coil, FMS 9mm wires, 1 5/8" MAC unequal shorties, 2 1/2" MAC Prochamber H-pipe, Flowmaster 2 chambers, KYBs, 16"x8" 4 lug Cobra Rs, Falken 245/45ZR16s