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1. Bore/Stroke Ratio (score: 1): Author: Jane McMeekin <jmcmeekin@worldnet.att.net>; Date: Thu, 19 Oct 2000 10:21:37 -0500; Talking about a "favorite" Class "D" engine size makes me wonder if an ideal bore/stroke ratio exists in terms of maximum power potential. Big bore, big valve condition aside, should we expect a sign; /html/land-speed/2000-10/msg00486.html (7,508 bytes)
2. Re: Bore/Stroke Ratio (score: 1): Author: dahlgren <dahlgren@uconect.net>; Date: Thu, 19 Oct 2000 11:39:18 -0400; Personally i would not put in a stroke much shorter than the valve gear will rev..If the stroke allows for a 11,000 redline and the valve gear will only go to 8000 then you are giving up a ton of com; /html/land-speed/2000-10/msg00488.html (8,152 bytes)
3. Re: Bore/Stroke Ratio (score: 1): Author: ardunbill@webtv.net; Date: Thu, 19 Oct 2000 16:59:44 -0400 (EDT); In the motorcycle racing world, there is a continuing trend to ever-shorter strokes nowadays, since the shorter the stroke, the lower the piston speed, and the higher the revs without excessive pisto; /html/land-speed/2000-10/msg00497.html (7,333 bytes)
4. Re: Bore/Stroke Ratio (score: 1): Author: "John Beckett" <landspeedracer@email.msn.com>; Date: Fri, 20 Oct 2000 09:24:19 -0400; I think Keith's reason for big bore small stroke is to create sufficient bore diameter to allow for the big valves he has for better breathing. I guess the thought is that better breathing makes more; /html/land-speed/2000-10/msg00517.html (8,117 bytes)
5. Re: Bore/Stroke Ratio (score: 1): Author: "John Beckett" <landspeedracer@email.msn.com>; Date: Fri, 20 Oct 2000 09:51:52 -0400; For what ever it's worth. Pro Stockers have bores in the 4.5" to 4.6" range I believe. Relatively short strokes for a big block. Not sure what R/S ratio (Dave do you know)? Seem to run 9000+ RPM with; /html/land-speed/2000-10/msg00518.html (8,083 bytes)
6. Re: Bore/Stroke Ratio (score: 1): Author: "John Beckett" <landspeedracer@email.msn.com>; Date: Fri, 20 Oct 2000 09:45:34 -0400; OK Dave, I think I understand what your saying. Had been following what old Smokey Yunick once said "you can't have a rod to long". I might disagree with him on this now. Our little 258 has a rod/str; /html/land-speed/2000-10/msg00519.html (9,346 bytes)
7. Re: Bore/Stroke Ratio (score: 1): Author: "Bryan A. Savage Jr" <basavage@earthlink.net>; Date: Fri, 20 Oct 2000 08:36:41 -0700; Apparently there is a point of diminishing returns. Yamaha's latest 1000 cc, the R1, has decreased the bore several millimeters to improve combustion chamber efficiency by reducing flame front travel; /html/land-speed/2000-10/msg00534.html (8,050 bytes)

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