What about the owner? -- _______ ..'_/_|_\_'. Ace (b.rogers at ifrance.com) \`\ | /`/ `\\ | //' BOTAFOT#3, SbS#2, UKRMMA#13, DFV#8, SKA#2, IBB#10 `\|/` `
Compression ratio defines the efficiency limit to an otto cycle engine, the lower the compression ratio, the lower the theoretical maximum efficiency. I thought you had to be careful with old Harley engines, on account of their bolt together bottom ends. Hence the Harley limit of shaking its self apart, limits the power available.
Sat at a table next to it, of course. Black open face lid and wrap around specs on the table. Glass of medium dry white in hand, recounting tales of past glories in his road racing days.
Generalisation no.1... Long stroke engines tend to be pretty good at producing torque low down but usually run into breathing difficulties and waste fuel at higher revs.The trade-off is usually for torque and economy versus lack of outright power. Many existing long-stroke engines are throwbacks to the 50s or before. Generalisation no.2... Most short stroke engines are bloody good all round, especially with multi-valve technology, which can compensate for the inherent lack of torque of a short stroke. Breathing at high revs is generally good. -- Dave GS850x2 XS650 SE6a "It's a moron working with power tools. How much more suspenseful can you get?" - House
"When I was on the Island..." -- Dave GS850x2 XS650 SE6a "It's a moron working with power tools. How much more suspenseful can you get?" - House
That Russel Mitchell bloke [1] doesn't fit them so any copy of his "style" [2] of bike won't have them, coz the septics are followers in design rather than leaders. [1] Unfortunately he's English [2] If style means little more than bolting a pair of forks and a motor to a frame -- Beav VN 750 Zed 1000 OMF# 19
"(1550cc) MOTOR PUTTING OUT 105BHP" Just how fucking inefficient are yank twins. How does a 1098 achieve 165HP with a 550cc deficit? By being able to rev. That means losing the pushrods, but getting the septics to move to overhead cams (or God forbid, a desmodromic type system) would be easier than getting Jonathon Ross to shut the **** up. -- Beav VN 750 Zed 1000 OMF# 19
So you are saying at their respective rpm for peak bhp the HD and 1098 will be operating with equal efficiency? I think not.
I think what he's saying is not that, but that the HD is likely to be much more efficient, in terms of BHP/unit fuel, than the 1098. I'm inclined to agree. -- _______ ..'_/_|_\_'. Ace (b.rogers at ifrance.com) \`\ | /`/ `\\ | //' BOTAFOT#3, SbS#2, UKRMMA#13, DFV#8, SKA#2, IBB#10 `\|/` `
