[OT] Re: [ILUG] Google 'behind the scenes' tech talk

[Paul Jakma]

On Tue, 16 Nov 2004, Conor Wynne wrote:

> All manufacturers lie about such things.
>
> e.g.: My YZF-R6 is factory quoted as having 117 Bhp, when in 
> reality its closer to 105 Bhp

That's not a lie though, that's due to to you (or the bike mag you 
read) not measuring the power in the same way. The manufacturers 
usually quote power as measured at the crankshaft, while you/bike 
mags usually quote power as measured at the rear wheel, on a rolling 
dyno. The difference is power dissipated in the gearbox (the oil 
primarily), chain and tyre rubber.

(and that the manufacturer can bench a few blue-printed engines and 
quote the best one ;) ).

Still, 105BHP to the road from a 600cc engine, on a ~200kg vehicle, 
is pretty impressive[1] ;)

> - just got off the blower to the bike shop talking about that exact 
> subject. Now she is booked in for a few hours on the dyno ;-0

1. 95HP on an 105kg vehicle is even more impressive - one day I 
*will* own an Aprilia RSV250, oh yes.

regards,
-- 
Paul Jakma	paul at clubi.ie	paul at jakma.org	Key ID: 64A2FF6A
Fortune:
Genetics explains why you look like your father, and if you don't, why
you should.