BSA had single camwheels (for single-cylinder bikes), so it might be a reference to that. I, however, found the BSA arrangement helpful - I was trying to persuade an M20 to go faster! Changing one cam at a time proved to be a useful thing. D.
Skimmed head, flat-slide carb, B31 inlet cam, Gold Star scrambler exhaust, Brooklands can and modified downpipe. 82mph. Had it round Brands Hatch in the mid-90s at a VMCC do. D.
The two lobes on a single shaft caption just pointed to how insular the mechanical world can be. While this engine being designed, the car world had been routinely doing multiple-lobe camshafts for decades. No big deal… I suspect a single shaft with two lobes would be cheaper and more efficient than two camshafts. And I really like the Parilla single lobe for both valves idea.
5 comments:
BSA had single camwheels (for single-cylinder bikes), so it might be a reference to that. I, however, found the BSA arrangement helpful - I was trying to persuade an M20 to go faster! Changing one cam at a time proved to be a useful thing. D.
I would love to hear how that project turned out, but this may not be the appropriate place.
(Maybe just briefly ...?)
Skimmed head, flat-slide carb, B31 inlet cam, Gold Star scrambler exhaust, Brooklands can and modified downpipe. 82mph. Had it round Brands Hatch in the mid-90s at a VMCC do. D.
The two lobes on a single shaft caption just pointed to how insular the mechanical world can be. While this engine being designed, the car world had been routinely doing multiple-lobe camshafts for decades. No big deal… I suspect a single shaft with two lobes would be cheaper and more efficient than two camshafts.
And I really like the Parilla single lobe for both valves idea.
82mph = 15mph more than my stock M20 could achieve (downhill, with a stiff tailwind). Nice project, Mr. Anonymous.
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