Date: 13 Jan 2005 15:29:31 GMT From: Dave Hinz <DaveHinznospamcop.net> Subject: Re: H engine in 9-5?
On Thu, 13 Jan 2005 06:33:01 GMT, Malcolm William Mason <mwm1nospamedu> wrote: > On Thu, 14 Oct 2004 21:43:23 GMT, hohnospamlid.invalid (Goran Larsson) > wrote: > >>In article <2t86t1F1q8vqkU1nospamberlin.de>, >>Dave Hinz <DaveHinznospamcop.net> wrote: >> >>> Less material and less surface >>towards the cylinder walls reduce friction and reduce fuel consumption. >>Just look at the pistons in the pictures; from the old B202 piston to a >>piston from a formula 1 engine. The B2x5 (Trionic 7) piston is closer >>in appearance to the F1 piston than to the B202 piston. >> > > > Sorry for the long delay!!!!! No problem at all! Glad to see you again. > The big reason for reduction in piston size is that piston mass is > reduced and therefore reversal losses have been reduced. This is > increasingly important as revs go higher since the reversal loss > varies as the square of the piston velocity. That makes sense. I've got the engine almost ready to drop out. Would have been this weekend but it'll be wicked cold in Wisconsin this weekend, so it's going to wait. I'll post post-mortem pictures once have them.
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