[DeTomaso] Rear Window
Ken Green
kenn_green at yahoo.com
Wed Mar 23 11:52:12 EDT 2016
What kind of boots do you have on your CV joints? I thought the boots trap the grease?
Ken
From: Stephen <steve at snclocks.com>
To: 'Julian Kift' <julian_kift at hotmail.com>; jgkrenton at comcast.net
Cc: detomaso at poca.com
Sent: Tuesday, March 22, 2016 8:36 PM
Subject: Re: [DeTomaso] Rear Window
Good question - I tend to keep my trunk tub in place, especially until I get
a darned CV joint to quit slinging grease. So, yes, for these tests, the
trunk was in.
Stephen Nelson
-----Original Message-----
From: Julian Kift [mailto:julian_kift at hotmail.com]
Sent: Tuesday, March 22, 2016 6:44 PM
To: Stephen <steve at snclocks.com>; jgkrenton at comcast.net
Cc: detomaso at poca.com
Subject: Re: [DeTomaso] Rear Window
Stephen,
Were your tests conducted with the trunk tub in place? I seem to recall
reading that the A/C function/design was dependent on the tub being in place
and have to wonder how that might affect air flow in out of the engine
compartment?
Julian
________________________________________
From: DeTomaso <detomaso-bounces at poca.com> on behalf of Stephen
<steve at snclocks.com>
Sent: Tuesday, March 22, 2016 6:06 PM
To: jgkrenton at comcast.net
Cc: detomaso at poca.com
Subject: Re: [DeTomaso] Rear Window
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
<http://www.snclocks.com/> SNClocks.com
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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" <steve at snclocks.com <mailto:steve at snclocks.com> >
To: "Jeff Detrich" <jjdetrich at gmail.com <mailto:jjdetrich at gmail.com> >
Cc: detomaso at poca.com <mailto: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 <http://www.snclocks.com/>
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From: Jeff Detrich [mailto:jjdetrich at gmail.com]
Sent: Tuesday, March 22, 2016 12:10 PM
To: Stephen <steve at snclocks.com <mailto:steve at snclocks.com> >
Cc: detomaso at poca.com <mailto:detomaso at poca.com> ; tjaarda at astranet.it
<mailto:tjaarda at astranet.it>
Subject: Re: [DeTomaso] Rear Window
On Tue, Mar 22, 2016 at 1:25 PM, Stephen <steve at snclocks.com
<mailto:steve at snclocks.com%20%3cmailto: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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-------------- next part --------------
What kind of boots do you have on your CV joints? I thought the boots
trap the grease?
Ken
__________________________________________________________________
From: Stephen <steve at snclocks.com>
To: 'Julian Kift' <julian_kift at hotmail.com>; jgkrenton at comcast.net
Cc: detomaso at poca.com
Sent: Tuesday, March 22, 2016 8:36 PM
Subject: Re: [DeTomaso] Rear Window
Good question - I tend to keep my trunk tub in place, especially until
I get
a darned CV joint to quit slinging grease. So, yes, for these tests,
the
trunk was in.
Stephen Nelson
-----Original Message-----
From: Julian Kift [mailto:[1]julian_kift at hotmail.com]
Sent: Tuesday, March 22, 2016 6:44 PM
To: Stephen <[2]steve at snclocks.com>; [3]jgkrenton at comcast.net
Cc: [4]detomaso at poca.com
Subject: Re: [DeTomaso] Rear Window
Stephen,
Were your tests conducted with the trunk tub in place? I seem to recall
reading that the A/C function/design was dependent on the tub being in
place
and have to wonder how that might affect air flow in out of the engine
compartment?
Julian
________________________________________
From: DeTomaso <[5]detomaso-bounces at poca.com> on behalf of Stephen
<[6]steve at snclocks.com>
Sent: Tuesday, March 22, 2016 6:06 PM
To: [7]jgkrenton at comcast.net
Cc: [8]detomaso at poca.com
Subject: Re: [DeTomaso] Rear Window
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
<[9]http://www.snclocks.com/> SNClocks.com
Click here to join one of our mailing lists
<[10]http://fs19.formsite.com/kagforms/form675003155/index.html>
Contact Lists
Click here for our new
<[11]http://www.snclocks.com/TheRestofourWorld/Hammered-Dulcimers/About
-Steves-D
ulcimers/19824807_4sHGgj#1558377542_LKmkrT7> Hammered Dulcimers
galleries
Click here for <[12]http://www.perfectoldman.com/> my new blog on
finding
happiness in retirement
From: [13]jgkrenton at comcast.net [mailto:[14]jgkrenton at comcast.net]
Sent: Tuesday, March 22, 2016 4:08 PM
To: Stephen <[15]steve at snclocks.com>
Cc: Jeff Detrich <[16]jjdetrich at gmail.com>; [17]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" <[18]steve at snclocks.com <mailto:[19]steve at snclocks.com>
>
To: "Jeff Detrich" <[20]jjdetrich at gmail.com
<mailto:[21]jjdetrich at gmail.com> >
Cc: [22]detomaso at poca.com <mailto:[23]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 <[24]http://www.snclocks.com/>
Click here to join one of our mailing lists Contact Lists
<[25]http://fs19.formsite.com/kagforms/form675003155/index.html>
Click here for our new
<[26]http://www.snclocks.com/TheRestofourWorld/Hammered-Dulcimers/About
-Steves-D
ulcimers/19824807_4sHGgj#1558377542_LKmkrT7> Hammered Dulcimers
galleries
Click here for my new blog <[27]http://www.perfectoldman.com/> on
finding
happiness in retirement
From: Jeff Detrich [mailto:[28]jjdetrich at gmail.com]
Sent: Tuesday, March 22, 2016 12:10 PM
To: Stephen <[29]steve at snclocks.com <mailto:[30]steve at snclocks.com> >
Cc: [31]detomaso at poca.com <mailto:[32]detomaso at poca.com> ;
[33]tjaarda at astranet.it
<mailto:[34]tjaarda at astranet.it>
Subject: Re: [DeTomaso] Rear Window
On Tue, Mar 22, 2016 at 1:25 PM, Stephen <[35]steve at snclocks.com
<mailto:[36]steve at snclocks.com%20%3cmailto:[37]steve at snclocks.com>
<mailto:[38]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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