[DeTomaso] Rear Window

[Dave]

No I meant dismount the impeller from the motor and turn it over.
I didn't pull mine to see if it was possible though.
dave

-- 

On 3/22/2016 8:43 PM, Stephen wrote:
> Right - you made me go look - one cannot just turn the motor and fan blade
> around - would move the fan blades out of the shroud.  But, given the fan is
> what, the radiator fan from a Fiat 850 (I seem to recognize it from many
> years ago when I had an 850), might make sense to mount a Spal in the
> shroud.  Then, if it blew the right direction, best of many worlds.
>   
> Stephen Nelson
>
>
>
> -----Original Message-----
> From: DeTomaso [mailto:detomaso-bounces at poca.com] On Behalf Of Dave
> Sent: Tuesday, March 22, 2016 7:42 PM
> To: detomaso at poca.com
> Subject: Re: [DeTomaso] Rear Window
>
> Or reverse the leads and turn the impeller over.
> (Ok - not helpful)
> dave
>
>
> On 3/22/2016 6:06 PM, Stephen wrote:
>>      Hmmm - reverse the leads on the existing fan or move the condenser to
>>      the front of the car.  Hmmm...
>>
>>
>>      The work I've done suggests reversing air flow would likely be pretty
>>      darned effective, especially at speed.  But, will have to wait for
>>      summer to see if it really does make the a/c colder.
>>
>>
>>      I also suspect it would be interesting to be cruising down the road
> and
>>      s/d the condenser fan - and see if the temperature at the a/c vents
>>      goes up, down or holds.  Absolutely, monitor the temperature - and
> make
>>      sure you don't over pressure your system (an increasing vent
>>      temperature would be a pretty good warning).  But, it would give one a
>>      better idea of the impact of a sucker fan on the condenser.
>>
>>
>>      Fortunately 5332 is still using R12 - I ended up with around 40 pounds
>>      of it when the big switch hit.  So, plan to stay on it for all my
> older
>>      cars.  Less risk of hoses going out.
>>
>>
>>      Stephen Nelson
>>
>>
>>      [1]SNClocks.com
>>
>>      Click here to join one of our mailing lists [2]Contact Lists
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>>
>>      From: jgkrenton at comcast.net [mailto:jgkrenton at comcast.net]
>>      Sent: Tuesday, March 22, 2016 4:08 PM
>>      To: Stephen <steve at snclocks.com>
>>      Cc: Jeff Detrich <jjdetrich at gmail.com>; detomaso at poca.com
>>      Subject: Re: [DeTomaso] Rear Window
>>
>>
>>      You could always move the condenser to the front of the car like many
>>      have done.  I believe this modification is reported to be quite
>>      effective.
>>
>>
>>      Jeff Kimball/2467
>>
>>
>>
>>      
>> ______________________________________________________________________
>> _
>>
>>      From: "Stephen" <[5]steve at snclocks.com>
>>      To: "Jeff Detrich" <[6]jjdetrich at gmail.com>
>>      Cc: [7]detomaso at poca.com
>>      Sent: Tuesday, March 22, 2016 12:54:02 PM
>>      Subject: Re: [DeTomaso] Rear Window
>>
>>
>>      You are right Jeff - especially because the fan powers from a wire on
>>      the dash-mounted temperature control that is separate from the wire
>>      that powers the a/c compressor clutch.
>>
>>
>>
>>
>>      Stephen Nelson
>>
>>
>>
>>
>>      SNClocks.com <[8]http://www.snclocks.com/>
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> <[10]http://www.snclocks.com/TheRestofourWorld/Hammered-Dulcimers/About
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>>
>>      From: Jeff Detrich [[12]mailto:jjdetrich at gmail.com]
>>      Sent: Tuesday, March 22, 2016 12:10 PM
>>      To: Stephen <[13]steve at snclocks.com>
>>      Cc: [14]detomaso at poca.com; [15]tjaarda at astranet.it
>>      Subject: Re: [DeTomaso] Rear Window
>>
>>
>>
>>
>>
>>
>>      On Tue, Mar 22, 2016 at 1:25 PM, Stephen <[16]steve at snclocks.com
>>      <mailto:steve at snclocks.com> > wrote:
>>
>>
>>       The positive pressure under the rear of the car when it is moving at
>>         speed, coupled with the likely vacuum behind the car reduces the
>>         efficiency of the a/c condenser fan.  My tests suggest that around
>>      60
>>         mph the air-flow through the condenser is reduced by about 40%.  At
>>         around 80 mph it is reduced by over 50%.  While I don't have a
>>      massive
>>         amount of data, what I have suggests that the decrease in flow
>>      through
>>         the condenser is not directly proportional to car speed, and that,
>>      in
>>         the 90 to 100 mph range the flow through the a/c condenser drops to
>>         around nothing.
>>
>>
>>      Sounds like if you are going to be cruising at very high speeds, just
>>      having a kill switch on the condenser fans would be helpful. That
> would
>>      be easy to wire I would think.
>>
>>
>>
>>
>>      Jeff
>>
>>
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