Re: [ST] July Rider

[david.funk@xxxxxxxxxxx]

Chris

I though the Rider MPG was calculated from the gas put into the tank and the miles traveled (most likely measured by the bikes odometer). Since magazines usually publish the MPG for all motorcycles tested, many without computer fuel consumption.

I would expect that Computer fuel consumption systems would just count the injector cycles to get the fuel usage. This is too easy to dream of using some other method.

David W. Funk
'00 Sprint ST
Pleasanton, CA


> David
> 
> Computer fuel consumption systems have to be taken with a dose of
> inside knowledge.  I hope I'm not preaching to the converted, but all
> they do is measure the fuel going into the injectors (either by
> measuring it out of the tank and measuring the return then subtracting),
> or guessing, based on the performance of the injector when it was new. 
> You then do the maths with that and the odometer feed from the front
> wheel to get mpg or kpl or whatever.
> 
> If you always ride with the bike cold (like down to the shops and
> back), the average can be abysmal.  If you want to sell the thing, just
> reset the average reading before you hit an interstate/motorway when the
> engine's hot, then cruise at 56mph on constant throttle and you might
> get 60mpg?  Looks good to the buyer.
> 
> The most peculiar behaviour on trip computers is with the Range
> function.  This tries to tell you how far you can go before you run dry.
>  You drive like a nutter normally, then fill up and take your
> grandmother up a motorway and the range just grows and grows and grows
> until you're sure you're actually making petrol!  It can only calculate
> on a PAST average if the reading is not to flash around all over the
> place.
> 
> Chris Harwood
> 00 RS that ran dry as it hit the forecourt today
> 
> >>> david.funk@xxxxxxxxxxx 08/06/2005 16:42:50 >>>
> An average of 36 mpg is very low, even for magazine testers.
> 
> I think a good mpg and a good range between gas stops is very important
> in a sport touring bike. Good MPG is nice, but good range is required.
> Sadly the Sprint ST has been headed the wrong direction for years. First
> a smaller gas tank, then lower mpg, and now it sounds like out right bad
> mpg.
> 
> My '00 ST averages around 47mpg. Even hard riding rarely cause the mpg
> to fall below 44. And in the right conditions (leading a CHP parade down
> HWY 5) will exceed 50 mpg.
> 
> David W. Funk
> '00 Sprint ST
> Pleasanton, CA
> 
> 
> > The July issue of Rider just appeared in my mailbox - There's a full
> test of 
> > the new ST.  It's even on the cover!  They seem to like the bike and
> think 
> > it's an improvement over the previous generation.  A couple of
> surprising 
> > things though - They mention less wind protection then before and
> their test 
> > unit averaged only 36 mpg.  This is a pretty big difference from my
> '01 - my 
> > low fuel light usually comes on around 190 - 200 miles, their '05 had
> the 
> > light coming on 115 and 140 miles.  I guess the bumped up
> displacement and 
> > horsepower increase can account for some of that, but it still seems
> pretty 
> > low.
> > 
> > John in NJ
> > '01 BRG ST
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