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Hardly any discrepancy at all 55*(165/125)^3 = 126.5I've got lots of queries just lately - Egli very very nearly back on the road again, and my brain is getting back into being a Vincent owner (ok half Vincent).
Question - How did the Vincent works measure the power of the bikes? Did they have their own dyno? Did they measure at the wheel or crank? etc
55 bhp is not a lot of power to push a heavy, unfaired bike to nearly 130 mph (probably wearing a Barbour jacket) when my 125 bhp lighter, faired Fireblade is only good for 165 mph. I know all (some of) the theory about diminishing returns, and the faster you go the more power you need to go a bit faster, but even so, there seems a big dicrepancy.
A local friend and auto engineer makes/tunes old style Jaguar engines (3.8 and 4.2). He told a very ignorant young man that he could get 265 bhp from his engine and it would be reliable. The reply was something like "that is what they had originally". My friend said "ah, yes, on paper." Apparently the E-type released for press may not have even been a 3.8. So the story goes.And Don't ever forget that PEI defined BHP
Brochure Horse Power!
Yes Stu it was a 3.8 in name only. The best any customer obtained was 120 mph on the M1. At one stage the longest skid marks in the world by a car was on the M1 courtesy of an E Type. (Guinness Book of Records)I heard that it was a 3.8 but it had been seriously "sorted" to make it a 150mph machine. Cheers, Stu.