[DeTomaso] Rear Window
Rob Dumoulin
rob at dumoulins.net
Wed Mar 23 11:43:40 EDT 2016
If the system is better served to reverse fan direction at speed, why not
have an air pressure switch and controller that does just that?
John Haas. are you listening to this? Sounds like a great project.
Rob DuMoulin
904.476.8744
rob at dumoulins.net
www.kbsi.co
http://www.linkedin.com/pub/rob-dumoulin/0/1b6/58
On Tue, Mar 22, 2016 at 10:41 PM, Dave <davel at emspace.com> wrote:
> 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
>
> Click here for our new [3]Hammered Dulcimers galleries
>
> Click here for [4]my new blog on finding happiness in retirement
>
>
> From: [1]jgkrenton at comcast.net [[2]mailto:jgkrenton at comcast.net]
> Sent: Tuesday, March 22, 2016 4:08 PM
> To: Stephen [3]<steve at snclocks.com>
> Cc: Jeff Detrich [4]<jjdetrich at gmail.com>; [5]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" [6]<[5]steve at snclocks.com>
> To: "Jeff Detrich" [7]<[6]jjdetrich at gmail.com>
> Cc: [[8]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][9]http://www.snclocks.com/>
>
>
> Click here to join one of our mailing lists Contact Lists
> <[9][10]http://fs19.formsite.com/kagforms/form675003155/index.html>
>
>
> Click here for our new
> <[10][11]
> http://www.snclocks.com/TheRestofourWorld/Hammered-Dulcimers/About
> -Steves-Dulcimers/19824807_4sHGgj#1558377542_LKmkrT7> Hammered
> Dulcimers galleries
>
>
> Click here for my new blog <[11][12]http://www.perfectoldman.com/> on
> finding happiness in retirement
>
>
>
>
> From: Jeff Detrich [[12][13]mailto:jjdetrich at gmail.com]
> Sent: Tuesday, March 22, 2016 12:10 PM
> To: Stephen [14]<[13]steve at snclocks.com>
> Cc: [[15]14]detomaso at poca.com; [[16]15]tjaarda at astranet.it
> Subject: Re: [DeTomaso] Rear Window
>
>
>
>
>
>
> On Tue, Mar 22, 2016 at 1:25 PM, Stephen <[[17]16]steve at snclocks.com
> [18]<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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> ves-Dulcimers/19824807_4sHGgj#1558377542_LKmkrT7
> 4. [24]http://www.perfectoldman.com/
> 5. [25]mailto:steve at snclocks.com
> 6. [26]mailto:jjdetrich at gmail.com
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> 8. [28]http://www.snclocks.com/
> 9. [29]http://fs19.formsite.com/kagforms/form675003155/index.html
> 10. [30]
> http://www.snclocks.com/TheRestofourWorld/Hammered-Dulcimers/About-Ste
> ves-Dulcimers/19824807_4sHGgj#1558377542_LKmkrT7
> 11. [31]http://www.perfectoldman.com/
> 12. [32]mailto:jjdetrich at gmail.com
> 13. [33]mailto:steve at snclocks.com
> 14. [34]mailto:detomaso at poca.com
> 15. [35]mailto:tjaarda at astranet.it
> 16. [36]mailto:steve at snclocks.com%20%3cmailto:steve at snclocks.com
> 17. [37]mailto:DeTomaso at poca.com
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> 4. mailto:jjdetrich at gmail.com
> 5. mailto:detomaso at poca.com
> 6. mailto:[5]steve at snclocks.com
> 7. mailto:[6]jjdetrich at gmail.com
> 8. mailto:7]detomaso at poca.com
> 9. http://www.snclocks.com/
> 10. http://fs19.formsite.com/kagforms/form675003155/index.html
> 11. http://www.snclocks.com/TheRestofourWorld/Hammered-Dulcimers/About
> 12. http://www.perfectoldman.com/
> 13. mailto:jjdetrich at gmail.com
> 14. mailto:[13]steve at snclocks.com
> 15. mailto:14]detomaso at poca.com
> 16. mailto:15]tjaarda at astranet.it
> 17. mailto:16]steve at snclocks.com
> 18. mailto:steve at snclocks.com
> 19. mailto:17]DeTomaso at poca.com
> 20. http://poca.com/mailman/listinfo/detomaso_poca.com
> 21. http://www.snclocks.com/
> 22. http://fs19.formsite.com/kagforms/form675003155/index.html
> 23.
> http://www.snclocks.com/TheRestofourWorld/Hammered-Dulcimers/About-Steves-Dulcimers/19824807_4sHGgj#1558377542_LKmkrT7
> 24. http://www.perfectoldman.com/
> 25. mailto:steve at snclocks.com
> 26. mailto:jjdetrich at gmail.com
> 27. mailto:detomaso at poca.com
> 28. http://www.snclocks.com/
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> 30.
> http://www.snclocks.com/TheRestofourWorld/Hammered-Dulcimers/About-Steves-Dulcimers/19824807_4sHGgj#1558377542_LKmkrT7
> 31. http://www.perfectoldman.com/
> 32. mailto:jjdetrich at gmail.com
> 33. mailto:steve at snclocks.com
> 34. mailto:detomaso at poca.com
> 35. mailto:tjaarda at astranet.it
> 36. mailto:steve at snclocks.com%20%3cmailto:steve at snclocks.com
> 37. mailto:DeTomaso at poca.com
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-------------- next part --------------
If the system is better served to reverse fan direction at speed, why
not have an air pressure switch and controller that does just that?
John Haas. are you listening to this?A Sounds like a great project.
Rob DuMoulin
904.476.8744
[1]rob at dumoulins.net
[2]www.kbsi.co
[3]http://www.linkedin.com/pub/rob-dumoulin/0/1b6/58
On Tue, Mar 22, 2016 at 10:41 PM, Dave <[4]davel at emspace.com> wrote:
A A Or reverse the leads and turn the impeller over.
A A (Ok - not helpful)
A A dave
A A On 3/22/2016 6:06 PM, Stephen wrote:
A A Hmmm - reverse the leads on the existing fan or move the
condenser to
A A the front of the car.A Hmmm...
A A The work I've done suggests reversing air flow would likely be
pretty
A A darned effective, especially at speed.A But, will have to wait
for
A A summer to see if it really does make the a/c colder.
A A I also suspect it would be interesting to be cruising down the
road and
A A s/d the condenser fan - and see if the temperature at the a/c
vents
A A goes up, down or holds.A Absolutely, monitor the temperature -
and make
A A sure you don't over pressure your system (an increasing vent
A A temperature would be a pretty good warning).A But, it would
give one a
A A better idea of the impact of a sucker fan on the condenser.
A A Fortunately 5332 is still using R12 - I ended up with around 40
pounds
A A of it when the big switch hit.A So, plan to stay on it for all
my older
A A cars.A Less risk of hoses going out.
A A Stephen Nelson
A A [1]SNClocks.com
A A Click here to join one of our mailing lists [2]Contact Lists
A A Click here for our new [3]Hammered Dulcimers galleries
A A Click here for [4]my new blog on finding happiness in
retirement
A A From: [1][5]jgkrenton at comcast.net
[[2]mailto:[6]jgkrenton at comcast.net]
A A Sent: Tuesday, March 22, 2016 4:08 PM
A A To: Stephen [3]<[7]steve at snclocks.com>
A A Cc: Jeff Detrich [4]<[8]jjdetrich at gmail.com>;
[5][9]detomaso at poca.com
A A Subject: Re: [DeTomaso] Rear Window
A A You could always move the condenser to the front of the car
like many
A A have done.A I believe this modification is reported to be
quite
A A effective.
A A Jeff Kimball/2467
A
A __________________________________________________________________
_____
A A From: "Stephen" [6]<[5][10]steve at snclocks.com>
A A To: "Jeff Detrich" [7]<[6][11]jjdetrich at gmail.com>
A A Cc: [[8]7][12]detomaso at poca.com
A A Sent: Tuesday, March 22, 2016 12:54:02 PM
A A Subject: Re: [DeTomaso] Rear Window
A A You are right Jeff - especially because the fan powers from a
wire on
A A the dash-mounted temperature control that is separate from the
wire
A A that powers the a/c compressor clutch.
A A Stephen Nelson
A A SNClocks.com <[8][9][13]http://www.snclocks.com/>
A A Click here to join one of our mailing lists Contact Lists
A
A <[9][10][14]http://fs19.formsite.com/kagforms/form675003155/index.
html>
A A Click here for our new
A
A <[10][11][15]http://www.snclocks.com/TheRestofourWorld/Hammered-Du
lcimers/About
A A -Steves-Dulcimers/19824807_4sHGgj#1558377542_LKmkrT7> Hammered
A A Dulcimers galleries
A A Click here for my new blog
<[11][12][16]http://www.perfectoldman.com/>A on
A A finding happiness in retirement
A A From: Jeff Detrich [[12][13]mailto:[17]jjdetrich at gmail.com]
A A Sent: Tuesday, March 22, 2016 12:10 PM
A A To: Stephen [14]<[13][18]steve at snclocks.com>
A A Cc: [[15]14][19]detomaso at poca.com;
[[16]15][20]tjaarda at astranet.it
A A Subject: Re: [DeTomaso] Rear Window
A A On Tue, Mar 22, 2016 at 1:25 PM, Stephen
<[[17]16][21]steve at snclocks.com
A A [18]<mailto:[22]steve at snclocks.com> > wrote:
A A The positive pressure under the rear of the car when it is
moving at
A A A speed, coupled with the likely vacuum behind the car
reduces the
A A A efficiency of the a/c condenser fan.A My tests suggest
that around
A A 60
A A A mph the air-flow through the condenser is reduced by about
40%.A At
A A A around 80 mph it is reduced by over 50%.A While I don't
have a
A A massive
A A A amount of data, what I have suggests that the decrease in
flow
A A through
A A A the condenser is not directly proportional to car speed,
and that,
A A in
A A A the 90 to 100 mph range the flow through the a/c condenser
drops to
A A A around nothing.
A A Sounds like if you are going to be cruising at very high
speeds, just
A A having a kill switch on the condenser fans would be helpful.
That would
A A be easy to wire I would think.
A A Jeff
A A _______________________________________________
A A Detomaso Forum Managed by POCA
A A Posted emails must not exceed 1.5 Megabytes
A A DeTomaso mailing list
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/About-Ste
ves-Dulcimers/19824807_4sHGgj#1558377542_LKmkrT7
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[30][34]http://www.snclocks.com/TheRestofourWorld/Hammered-Dulcimers
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A 11. [31][35]http://www.perfectoldman.com/
A 12. [32]mailto:[36]jjdetrich at gmail.com
A 13. [33]mailto:[37]steve at snclocks.com
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A A 9. [55]http://www.snclocks.com/
A 10.
[56]http://fs19.formsite.com/kagforms/form675003155/index.html
A 11.
[57]http://www.snclocks.com/TheRestofourWorld/Hammered-Dulcimers/Abo
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A 13. mailto:[59]jjdetrich at gmail.com
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A 19. mailto:[68]17][69]DeTomaso at poca.com
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[73]http://www.snclocks.com/TheRestofourWorld/Hammered-Dulcimers/Abo
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15. http://www.snclocks.com/TheRestofourWorld/Hammered-Dulcimers/About
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17. mailto:jjdetrich at gmail.com
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28. http://www.perfectoldman.com/
29. mailto:steve at snclocks.com
30. mailto:jjdetrich at gmail.com
31. mailto:detomaso at poca.com
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34. http://www.snclocks.com/TheRestofourWorld/Hammered-Dulcimers/About-Steves-Dulcimers/19824807_4sHGgj#1558377542_LKmkrT7
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72. http://fs19.formsite.com/kagforms/form675003155/index.html
73. http://www.snclocks.com/TheRestofourWorld/Hammered-Dulcimers/About-Steves-Dulcimers/19824807_4sHGgj#1558377542_LKmkrT7
74. http://www.perfectoldman.com/
75. mailto:steve at snclocks.com
76. mailto:jjdetrich at gmail.com
77. mailto:detomaso at poca.com
78. http://www.snclocks.com/
79. http://fs19.formsite.com/kagforms/form675003155/index.html
80. http://www.snclocks.com/TheRestofourWorld/Hammered-Dulcimers/About-Steves-Dulcimers/19824807_4sHGgj#1558377542_LKmkrT7
81. http://www.perfectoldman.com/
82. mailto:jjdetrich at gmail.com
83. mailto:steve at snclocks.com
84. mailto:detomaso at poca.com
85. mailto:tjaarda at astranet.it
86. mailto:steve at snclocks.com
87. mailto:20%253cmailto%3Asteve at snclocks.com
88. mailto:DeTomaso at poca.com
89. http://poca.com/mailman/listinfo/detomaso_poca.com
90. mailto:DeTomaso at poca.com
91. http://poca.com/mailman/listinfo/detomaso_poca.com
92. mailto:DeTomaso at poca.com
93. http://poca.com/mailman/listinfo/detomaso_poca.com
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