<VV> Let's see the results -- RE: Re: blow up about questions about electric fans

[Jim Burkhard]

That sounds great, Ken! I eagerly look forward to your results so we can
stop the banter and get onto serious topics like tissue box restoration and
oil filter collecting.  ;-)

If you guys are serious about doing this, make sure you allow enough extra
cash in there to buy / rent / borrow some decent instrumentation to arrive
at real results.  You'll need (at minimum) a low differential pressure gauge
and some thermocouples and a reader.  Do before and after tests on the same
car under the same conditions under the same instruments. I am amazed at how
many people spend large $ on projects without any instrumentation or
management of conditions to tell how well things worked.  You've all heard
it at one time or another: "Well, by golly it werked fer me! Who needs to
know math or fizuks?"  Let's see some real numbers.  

As others have noted (John Roberts, I think) The very Spal pressure/flow
curve somebody linked to suggests that the Spal fan will NOT flow as much
air as the Vair fan UNDER THE SAME PRESSURE DROP. People seems to ignore the
fact that airflow MUST be specified at a pressure drop for it to mean
anything.  It is (comparably) easy to each flow-only requirements by putting
your fan in free or nearly free air (minimal downstream restriction).  In
our application, though, the fan must overcome the restriction afforded by
the Corvair heads and rest of the engine in the flow path.  I've little
doubt that an electric fan can supply sufficient airflow for the Vair engine
*under some conditions* (i.e. the stock fan is overkill during much
driving).  I sincerely doubt, though, that it can do so under all
conditions, and this is corroborated by the best current engineering
evidence (the aformentioned manufacturer's fan curve). If you guys want to
pony up the $$$ to do a real engineering in-situ evaluation, I'd love to see
the results.  I'd suggest discussing your proposed instrumentation & test
plan on here in advance, so everyone (including us skeptics) are in
agreement about the best way to test it so the results are meaningful. That
way, you'll help avoid people dismissing the results afterward.

Eagerly awaiting your results-

Jim Burkhard

> -----Original Message-----
> From: virtualvairs-bounces at corvair.org 
> [mailto:virtualvairs-bounces at corvair.org] On Behalf Of Ken Campbell
> Sent: Friday, August 05, 2005 1:44 AM
> To: virtualvairs at corvair.org
> Subject: Re: <VV> Re: blow up about questions about electric fans
> 
> 
> 
> ----- Original Message ----- 
> From: "Larry Forman" <Larry at forman.net>
> Subject: <VV> Re: blow up about questions about electric fans
> 
> 
> > Hi Trisha,
> > I can understand how Tom felt.  I have been following this 
> on VV and 
> > FastVairs and at least one comment in particular made ME mad!
> //// Furthermore, I was pretty impressed with
> > Tom's work and so were some others.  It just takes time and 
> > unfortunately
> a
> > thick skin for uncalled-for comments.  All this should 
> continue to die
> down
> > with time and exposure.
> >
> >//// The silver lining is that this thread related to Tom's work has
> generated a
> > TON of good questions and people talking about Tom's work,
> >
> > ////The best thing for Tom is to continue to do good work and DRIVE 
> > and
> show
> > his car/s and their performance.
> >
> > ////So please hang in there for the long haul.  After this is over, 
> > the
> ride
> > should be worth the effort, just like Corvairs.
> >
> > Larry
> *********
> Good Post, Larry ....   as a small mfg ourselves, the above 
> is oh so true
> ... whoever said " build a better mousetrap ... " failed to 
> mention that you also need a huge marketing budget to attract 
> people to beat a path to your door.
> 
> Now if some youthful (g) energentic, enthusiastic, efflusive 
> spirit ( hey, how about Larry Foreman !! ) would get together 
> about 12 or 15 inquisitive corvair types, I for one have $50 
> or so I would throw at group-getting one of his fan kits and 
> try it out and report on the results here from time to time .....
> 
> reargards, ken campbell, deltawerkes.
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
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