Comments on: What Happened to the Drysdale V8? http://thekneeslider.com/archives/2007/12/13/what-happened-to-the-drysdale-v8/ Motorcycle News for Positive People Sun, 12 Feb 2012 09:09:53 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: todd http://thekneeslider.com/archives/2007/12/13/what-happened-to-the-drysdale-v8/#comment-106907 todd Mon, 17 Dec 2007 20:16:55 +0000 http://thekneeslider.com/archives/2007/12/13/what-happened-to-the-drysdale-v8/#comment-106907 Maybe Honda was trying to mislead. Their own 250 was a 6 and their 125's were twins and fours. I'd love to be able to find the artical again, it's just that it's burried somewhere in a giant stack of old motorcycle magazines from that era. -todd Maybe Honda was trying to mislead. Their own 250 was a 6 and their 125′s were twins and fours. I’d love to be able to find the artical again, it’s just that it’s burried somewhere in a giant stack of old motorcycle magazines from that era.

-todd

]]> By: Canzvt http://thekneeslider.com/archives/2007/12/13/what-happened-to-the-drysdale-v8/#comment-106856 Canzvt Mon, 17 Dec 2007 15:39:18 +0000 http://thekneeslider.com/archives/2007/12/13/what-happened-to-the-drysdale-v8/#comment-106856 When I was doing some research work on infinitely variable valve timing we met with engineers from BMW when they were working on the Valve-tronic. According to them (and backed up by GM engineers) the most efficient cylinder diameter for 4 stroke combustion with PUMP GAS is between 82 and 86mm. This indicates flame front speed is critical. All other engine design variables are design compromises for things like desired RPM, torque curve, engine size, accessory location, # of cylinders etc, etc. Also look into bore/stroke/rod length comparisons. F1 is approaching (if not exceeding) 3:2:1. That is for a bore of 100, stoke will be 50 and the rod length will be 150. This addresses internal friction of the piston/bore relationship, as well as allowing hi RPM for Horsepower, while maintaining acceptable rod angularity to maintain torque (for a given engine size). When I was doing some research work on infinitely variable valve timing we met with engineers from BMW when they were working on the Valve-tronic. According to them (and backed up by GM engineers) the most efficient cylinder diameter for 4 stroke combustion with PUMP GAS is between 82 and 86mm. This indicates flame front speed is critical. All other engine design variables are design compromises for things like desired RPM, torque curve, engine size, accessory location, # of cylinders etc, etc. Also look into bore/stroke/rod length comparisons. F1 is approaching (if not exceeding) 3:2:1. That is for a bore of 100, stoke will be 50 and the rod length will be 150. This addresses internal friction of the piston/bore relationship, as well as allowing hi RPM for Horsepower, while maintaining acceptable rod angularity to maintain torque (for a given engine size).

]]> By: Hugo http://thekneeslider.com/archives/2007/12/13/what-happened-to-the-drysdale-v8/#comment-106820 Hugo Mon, 17 Dec 2007 13:29:38 +0000 http://thekneeslider.com/archives/2007/12/13/what-happened-to-the-drysdale-v8/#comment-106820 Some interesting info about the Ecosse and aerodynamics by Tony Foale: http://www.ecossespirit.com/PDFs/Moto%20Tech%20press%20piece.pdf Some interesting info about the Ecosse and aerodynamics by Tony Foale: http://www.ecossespirit.com/PDFs/Moto%20Tech%20press%20piece.pdf

]]> By: ROHORN http://thekneeslider.com/archives/2007/12/13/what-happened-to-the-drysdale-v8/#comment-106742 ROHORN Mon, 17 Dec 2007 02:24:05 +0000 http://thekneeslider.com/archives/2007/12/13/what-happened-to-the-drysdale-v8/#comment-106742 Which means that the above V8 should be no less reliable than, as I understand it, the 400 from which it was derived. That said, I'd still rather mess with twins. Twin cylinder engines, that is. I just don't have the misconception that they are more powerful or more reliable due to the number of parts involved. Oh, THAT RED PRINT? Motorcycles are inanimate objects without feelings and always respond to reason. Which means that the above V8 should be no less reliable than, as I understand it, the 400 from which it was derived.

That said, I’d still rather mess with twins. Twin cylinder engines, that is. I just don’t have the misconception that they are more powerful or more reliable due to the number of parts involved.

Oh, THAT RED PRINT? Motorcycles are inanimate objects without feelings and always respond to reason.

]]> By: todd http://thekneeslider.com/archives/2007/12/13/what-happened-to-the-drysdale-v8/#comment-106729 todd Sun, 16 Dec 2007 23:29:00 +0000 http://thekneeslider.com/archives/2007/12/13/what-happened-to-the-drysdale-v8/#comment-106729 Sorry, technically MTBF does consider time, a cycle or range of cycles being "time". I meant to suggest some items can last the same duration of time even if they can't survive the same number of cycles. -todd Sorry, technically MTBF does consider time, a cycle or range of cycles being “time”. I meant to suggest some items can last the same duration of time even if they can’t survive the same number of cycles.

-todd

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