I already have the 98" with 9.7 comp pistons/ beehive springs/titanium retainers (from HDWRENCH) rev perf is the ones who thought I should run the 577, I just didn't know anything about it, also this is a EFI bike.STB said:Needless to say, there are so many engine variables, any prediction of performance is relative.
I ran the red shift 577 in a 98 ci build up to a 114 build on a daily basis. I have run it in my current build, but it is a bit too small for touring baggers in over 114 builds, in my experience. CCP is a bit high but quite acceptable. Nice cam if you match up the heads for the cam, at a minimum. Rev Perf can tell you about them and probably provide dyno sheets.
In a 114, the red shift 577 is a really nice bagger touring type small cam with the right heads. Still, 120 hp is easy to get in a 114 with this cam. The torque is like turning on a water faucet: it keeps comin' if you keep twisiting. You can run 10 to 1 compression with it and still get power. 10.5 to one is no problem either. Dave Mackie has a little bigger cam that is pretty nice too at about 590 lift or so. Look at the duation of the red shift pretty closely; its a bit long for EFI bikes according to some builders but I had no problems with it on an EFI bike. This cam has a lot of TDC lift. the specs on nightrider.com for this cam are not correct the last time I checked. Zippers can give you accurate specs since they changed its profile (I suspect) a couple of years ago. Consensus of opinion is the 577 is a bit better cam than the closest Andrews according to Wolfgang Grasser (ami shootout TC winner a couple of years ago) who has run both in the same engine. Easier on valve train than comparable SnS cams, IMO. Not noisey. High valve seat pressure required, near 200. So consider running titanium retainers and keepers to keep weight down and you can use the lower seat pressure recommended by Zippers: low 180s at installed height. The beehive single valve spring might be an advantage for the same reason, but I have not used it, yet. Flouro treat the valve springs; large base AV&V springs with damper will do the job or use the Zippers springs for that cam.
Seabrook Trick Bagger