Wild Bill Posted September 18, 2018 Share Posted September 18, 2018 Saw a press release on the new 1250 GS and RT. I don't think I was dreaming... It has a cam that shifts based on load, and I guess the load... So After wet heads, now we need a new group "Cam Shifter" or some thing similar... BK Link to comment
lkraus Posted September 18, 2018 Share Posted September 18, 2018 (edited) Yeah, Shifthead. (Enunciate) The torque increase looks real enough, at all rpm. Same torque at 2750 rpm as 4500 rpm on the r1200. We've been telling RT newbies to keep the revs up, to at least 3000 rpm - the R1250 claims more torque than that at 1750 rpm. Edited September 18, 2018 by lkraus Link to comment
szurszewski Posted September 19, 2018 Share Posted September 19, 2018 (edited) Vanhead fits better, but it's certainly less fun to say. Edited September 19, 2018 by szurszewski Link to comment
David13 Posted September 19, 2018 Share Posted September 19, 2018 Variable cam? Global innovation? That's actually been around for a very long time, hasn't it? dc Link to comment
BeemerBerg Posted September 19, 2018 Share Posted September 19, 2018 My wife calls me that all the time. Wait, damn speed reading. I missed the "f". +1 Link to comment
John in VA Posted September 19, 2018 Share Posted September 19, 2018 Maybe the F could be capitalized in the category heading for clarity. "ShiFthead" Link to comment
szurszewski Posted September 19, 2018 Share Posted September 19, 2018 Variable cam? Global innovation? That's actually been around for a very long time, hasn't it? dc The cam moves to adjust the valve timing right? So that' would make it like the BMW car VANOS system, thus VANhead (and keeps the nice three letter prefix like the previous names). I didn't come up with the idea - saw it suggested in another "what should we call them?" thread... Link to comment
Paul De Posted September 19, 2018 Share Posted September 19, 2018 Airhead,oilhead, hexhead, camhead, wethead.... Hmm, how about churnhead! Link to comment
Rider1200RT Posted September 19, 2018 Share Posted September 19, 2018 Maybe $$$head? Wondering how expensive repairs will be once the solenoids or cams wear out. Another ride best kept under warranty... Link to comment
JamesW Posted September 19, 2018 Share Posted September 19, 2018 Variable valve timing isn't anything new at all. Another BMW innovation I can live without. Maybe if it said Ford on the gas tank I would feel better about owning one. Or maybe even Yamaha. Yup, definitely Yamaha. Link to comment
Marty Hill Posted September 19, 2018 Share Posted September 19, 2018 And yet your here to throw rocks. Link to comment
BrianM Posted September 19, 2018 Share Posted September 19, 2018 Variable cam? Global innovation? That's actually been around for a very long time, hasn't it? dc The cam moves to adjust the valve timing right? So that' would make it like the BMW car VANOS system, thus VANhead (and keeps the nice three letter prefix like the previous names). I didn't come up with the idea - saw it suggested in another "what should we call them?" thread... Bike system is really not anything like the VANOS system. Link to comment
John in VA Posted September 19, 2018 Share Posted September 19, 2018 Variable cam? Global innovation? That's actually been around for a very long time, hasn't it? dc The cam moves to adjust the valve timing right? So that' would make it like the BMW car VANOS system, thus VANhead (and keeps the nice three letter prefix like the previous names). I didn't come up with the idea - saw it suggested in another "what should we call them?" thread... Bike system is really not anything like the VANOS system. Agree, the cars' VANOS continuously "Varies" the rotation of one shaft of cams relative to the crankshaft, which the bike doesn't do, so "Vanhead" wouldn't be apt for the bike. The bike system shifts the camshaft back and forth between two alternating cams for each valve (not Variable), so it's a "SHIFThead"! Link to comment
WBinDE Posted September 20, 2018 Share Posted September 20, 2018 The "ShiftCam" system is very much like Mercedes' Camtronic system - it too has a sliding camshaft with two profiles. They claim 80% of the benefit of a fully variable system at significantly less cost and complexity. Just a straight spline between cam gear and camshaft, and an on/off actuator. BMW cars are way more complex, they use VANOS (double sided hydraulic actuator and spiral spline between cam gear and camshaft) to continuously vary valve timing and Valvetronic (lever arrangement with movable fulcrum for each valve, driven by a single stepper motor) to continuously vary valve lift. Link to comment
SANTA Posted September 21, 2018 Share Posted September 21, 2018 i like shiFthead... especially if there are problems and you don't type the "F"... Link to comment
elkroeger Posted September 22, 2018 Share Posted September 22, 2018 My wife calls me that all the time. Wait, damn speed reading. I missed the "f". +1 Expanding on that train of thought - my wife votes for asshat. Link to comment
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