- Aug 19, 2010
lcrken said:xbacksideslider said:Thanks Ken. Good pics. Square cam lobes are always a "tell."
Hi John. They are pretty lumpy, aren't they? I'm pretty sure the regular RD springs I've been using for so many years will not be up to it. I'm expecting to need to run it to at least 8000 rpm, and maybe 8500 rpm, to get max horsepower, and I'll be looking for a better spring package. At the moment, the options look like beehive, conical, or just some stronger conventional coils. RD has a NASCAR spring set that will fit that I think might work.
Yes, as I understand it, the beehives/conicals offer a longer wire/spring, that compresses into its center, so the uncompressed/early lift pack can be lighter while the full lift/compressed control is heavier. Dr. Taglioni, looking at hairpin springs and a valve box he designed for them, found a different way to get his valves to follow square cam profiles.