DIY WB update

[Keith]

Bruce,
Check the date on you computer. I think you're living back in 1998.
Your emails have a 98 date stamp.
later
Keith

Bruce wrote:
> 
> From: "Greg Hermann" <bearbvd at cmn.net>
> Subject: Re: DIY WB update
> 
> > At 12:30 AM 8/14/98, Bruce wrote:
> > >Speaking of lean cruise.
> > >I can't find any real big gains in going real lean anyway.  Still need to
> > >burn x amount of fuel to make a given amount of power to actually move
> the
> > >car.  Maybe, better results, in a lighter car, but then you give away all
> > >the road hugging weight.  the instant you have to run more throttle
> opening
> > >from the leaner AFR, then your using more fuel anyway due to the greater
> air
> > >flow.  While you might run 10% leaner, if you have to use more throttle
> > >opening you might be using a larger total amount of fuel.
> > >Just completely the opposite of what pumping loses would dictate.
> > >Again, theory falls short of real life....
> > >Bruce
> 
> > Gearing is part and parcel of tuning. Gotta go to a taller gear along with
> > the leaner af ratio--which cuts the quantity of air back down to where it
> > was before the throttle got opened a bit more. The extra load on the
> engine
> > from the taller gear allows the wider throttle opening and consequent
> > reduction in pumping losses.
> 
> Also, that assumes that the engine is still operating in an efficent rpm
> range.   It's easy to lug and engine with too much gearing and then have
> even worse economy.
> 
> > Part of the reason for higher power on the rich side of stoich is
> selective
> > burning of the hydrogen in the fuel before the carbon gets burned. The
> > hydrogen fraction has a higher heat of combustion than the carbon does,
> > hence more heat and power for a given amount of air with a somewhat rich
> af
> > ratio, but less mileage because not all of the fuel (some of the carbon
> > part) is being burned.
> 
> Isn't that the reason for having to add timing, when going, leaner?.
> Bruce
> >
> > Greg
> 
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-- 
Keith Gill F.A.S.T.
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