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oldcorollas Forums Junkie Location: Kita-Ku, Sapporo, Japan Registered: January 2003	Re: Turkish Grandprix Mon, 22 August 2005 08:46 funny you should say that.. i was thinking about this while watching, wondering if they would ever go to 8 gears, and if the advantage vs time lost during shifting would be worth it.. as for the stroke vs rpm thing... there is kind of a material limit on piston speed of (iirc) 5000ft/min, but it is basically determined by the materials used for the rods as it is the rod, in tension, that must survive. the problem with going to shorter stroke is a) less torque, and b) heavier pistons. w/r b, this means that you are swinging a higher load faster, but less far... and the forces increase with the square of speed, so it gets pretty significant pretty quickly.. to keep the power they have to increase rpm, because they are restricted in how much torque they can make. a quick calc says they are getting around 280Nm from 2.4L, that sounds about right. i would've expected closer to 300 (Bill S and other say 100ftlbs which is more like 320nm) as for loads on rods.. i cbf calculating right now but if they have a fancy new piston design/alloy to reduce loading, that will help.. i just wonder how wide the power band will be? 3000rpm? 4000rpm? and how the poor valve train is going to cope eith the increase in loading.. as for rpm, the CBR250 bikes run at 19000rpm.. and the S2000 has similar piston speed to (possibly older) F1 motors of around the magic 5000ft/min mark... fwiw, most normal engines only go to around 3500-4000ft/min [Report message to a moderator]

	Subject	Poster	Date
	Turkish Grandprix	Corona RT142	Mon, 22 August 2005 04:33
	Re: Turkish Grandprix	oldcorollas	Mon, 22 August 2005 04:58
	Re: Turkish Grandprix	st184 sillycar	Mon, 22 August 2005 05:36
	Re: Turkish Grandprix	Nark	Mon, 22 August 2005 05:05
	Re: Turkish Grandprix	oldcorollas	Mon, 22 August 2005 05:06
	Re: Turkish Grandprix	79rollaboy	Mon, 22 August 2005 05:10
	Re: Turkish Grandprix	Nark	Mon, 22 August 2005 05:14
	Re: Turkish Grandprix	79rollaboy	Mon, 22 August 2005 05:37
	Re: Turkish Grandprix	matt86sx	Mon, 22 August 2005 05:53
	Re: Turkish Grandprix	EVOSTi	Mon, 22 August 2005 07:03
	Re: Turkish Grandprix	st184 sillycar	Tue, 23 August 2005 05:00
	Re: Turkish Grandprix	Corona RT142	Mon, 22 August 2005 07:14
	Re: Turkish Grandprix	BlackGT4	Mon, 22 August 2005 07:28
	Re: Turkish Grandprix	Corona RT142	Mon, 22 August 2005 07:29
	Re: Turkish Grandprix	BlackGT4	Mon, 22 August 2005 08:14
	Re: Turkish Grandprix	Corona RT142	Mon, 22 August 2005 08:24
	Re: Turkish Grandprix	oldcorollas	Mon, 22 August 2005 08:46
	Re: Turkish Grandprix	Shraka	Mon, 22 August 2005 08:38
	Re: Turkish Grandprix	xolent	Mon, 22 August 2005 13:00
	Re: Turkish Grandprix	Roundy	Mon, 22 August 2005 22:54
	Re: Turkish Grandprix	st184 sillycar	Tue, 23 August 2005 04:49
	Re: Turkish Grandprix	oldcorollas	Tue, 23 August 2005 06:15
	Re: Turkish Grandprix	Corona RT142	Mon, 22 August 2005 23:16
	Re: Turkish Grandprix	river	Tue, 23 August 2005 03:06
	Re: Turkish Grandprix	Roundy	Tue, 23 August 2005 03:14
	Re: Turkish Grandprix	cannonball	Tue, 23 August 2005 05:22
	Re: Turkish Grandprix	Corona RT142	Tue, 23 August 2005 06:25
	Re: Turkish Grandprix	matt86sx	Wed, 24 August 2005 00:02
	Re: Turkish Grandprix	Roundy	Wed, 24 August 2005 00:13
	Re: Turkish Grandprix	st184 sillycar	Wed, 24 August 2005 01:28
	Re: Turkish Grandprix	Corona RT142	Wed, 24 August 2005 00:24
	Re: Turkish Grandprix	Corona RT142	Wed, 24 August 2005 01:33
	Re: Turkish Grandprix	st184 sillycar	Wed, 24 August 2005 01:44
	Re: Turkish Grandprix	Corona RT142	Wed, 24 August 2005 01:49
	Re: Turkish Grandprix	EVOSTi	Wed, 24 August 2005 04:31
	Re: Turkish Grandprix	Corona RT142	Wed, 24 August 2005 04:38
	Re: Turkish Grandprix	cannonball	Wed, 24 August 2005 05:20
	Re: Turkish Grandprix	Corona RT142	Wed, 24 August 2005 05:22
	Re: Turkish Grandprix	Ben Wilson	Thu, 25 August 2005 01:59

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