Chris wrote: "Note that all are approximations."
--------------------------------
Stan replys: Then why bother?

Stan Wilder

On Mon, 15 Jul 2002 18:55:13 -0400 Christopher Berchin
<ctb1@PEOPLEPC.COM> writes:
> << I'm just curious if there is a definitive place to look for
> comparisons on these engine conversions? >>
>
> I wouldn't call it "definitive," but I'm currently working on
> finishing a
> spreadsheet with graphical analysis of the 2.2 Subie, 3.3 Subie, 1.9
> and 2.1
> WBX engines.  Basically I've plotted the thrust curves for each
> engine in
> each gear over the entire rev range.  What I'm working on now is
> adding the
> effects of powertrain losses (i.e. frictional losses that are
> internal) and
> aero drag.  I have it figured out, I just haven't finished it yet.
> Once
> done, I can post the graphs - right now, the only thing that really
> "has it
> all" is my comparison of the 2.1 WBX to the Subaru 2.2, but only for
> top
> gear.  I have drag and powertrain loss effects only for fourth gear
> for
> those engines - what's left to do is to do the rest of the gears
> and
> engines.
>
> The whole thing is an Excel spreadsheet, so you can play with tire
> sizes,
> gear ratios, and dyno cuves to see what happens.  Note that all are
> approximations, but so far my 1.9 WBX chart says that I should top
> out at
> about 91 mph, and since the top speed is really 88 mph in reality,
> that's
> close enough for gov't work.
>
> If anybody wants the final results, drop me a line and I can send it
> along
> to you.  Once I have something close to complete, I can upload the
> graphs at
> my Imagestation albums.
>
> To add more engines, all you would need is dyno data and gear
> ratios.  Punch
> it in on the spreadsheet, do a little Excel work, and bammo - a new
> comparison is born.
>
> Chris
>

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