Fordnatics List Archive
Underdrive pulleys and A/C
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., Online, USA
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Mail From: chucko (Chuck Fry)
[Another one sent to the -request address. -- Chuck]
- --- begin forwarded message ---
From: (email redacted)
To: (email redacted)
Date: Wed, 06 Jul 94 18:44:57 EDT
Subject: Re: Underdrive pulleys and A/C
>From Rayzor:
<< The function of the A/C seems
< to be more dependent on road speed than engine speed but that is < only a
< subjective opinion. Also, what is the right temp for the A/C output < air
and
< what is the procedure for measuring it?
< Thanks for your help.
< Ray Schumin
Road speed is as important as engine speed bacause you have to move air
through the condenser to get the heat exchange required. You also have wind
up the compressor somewhat, not too much though
<<< Veteran of a missed
shift with the A/C on
The simplest way to measure air temp is with a vent thermometer stuck in
the middle vent and the A/C on Max cooling. if the air temp outside,with you
sitting still, is 40 or more degrees above what you see at the vent, then
it's usually safe to assume you have a properly functioning system. But,
different factors play a part, such as ; humidity,outside temp., the
internal integrity of the compressor ,i.e. are any seals worn that may cause
blow by??, etc... and of course, the proper amount of Freon in the system to
begin with.
The fact that you have a set of underdrives doesn't help either. How
accurate your volt gauge is is a matter of great controversy but thats not
too important right now. The bottom line is, does the A/C remove enough heat
from the interior of the vehicle to make it comfortable for you to sit in
after a few minutes?? If it is, I wouldn't worry too much about it Remember
though, it may take as much as 15 minutes to acheive proper temerature inside
the vehicle on a hot summer day.
One other thing though, Fords are famous for requiring whats called a
reseal. basically they need to have the O-ring seals at the condensor and
accumulator replaced and have the system recharged. It seems the connections
vibrate under normal usage and Freon will gradually slip out, albeit at a
higher rate than most other systems. The only way to cure this is to purchase
a set of clamping blocks that will make the connections leak proof, to a
point, made of aluminium that will prevent the normal vibrations of use
causing the Freon to leak. I don't remember where I saw them for sale but I
think they can be found in a Murray Temp catalog.....I'm not quite sure
though. The next step beyond that is to install the new style barrier hoses
that have an impregnable teflon liner. Those are a definite improvement over
the factory items but they are a bit pricey. Then again, how much does it
cost to recharge the A/C system on an almost yearly basis?? With the demise
of R12 in the very near future, it may make sense to prevent any further
leakage and keep the more efficient refrigerant in the system.
I hope this is helpful.....
Joe
Email address:
(email redacted)
<< My little quote....IF you had everything, where would you put it?? >>
- --- end forwarded message ---
Mail From: chucko (Chuck Fry)
[Another one sent to the -request address. -- Chuck]
- --- begin forwarded message ---
From: (email redacted)
To: (email redacted)
Date: Wed, 06 Jul 94 18:44:57 EDT
Subject: Re: Underdrive pulleys and A/C
>From Rayzor:
<< The function of the A/C seems
< to be more dependent on road speed than engine speed but that is < only a
< subjective opinion. Also, what is the right temp for the A/C output < air
and
< what is the procedure for measuring it?
< Thanks for your help.
< Ray Schumin
Road speed is as important as engine speed bacause you have to move air
through the condenser to get the heat exchange required. You also have wind
up the compressor somewhat, not too much though
<<< Veteran of a missedshift with the A/C on
The simplest way to measure air temp is with a vent thermometer stuck in
the middle vent and the A/C on Max cooling. if the air temp outside,with you
sitting still, is 40 or more degrees above what you see at the vent, then
it's usually safe to assume you have a properly functioning system. But,
different factors play a part, such as ; humidity,outside temp., the
internal integrity of the compressor ,i.e. are any seals worn that may cause
blow by??, etc... and of course, the proper amount of Freon in the system to
begin with.
The fact that you have a set of underdrives doesn't help either. How
accurate your volt gauge is is a matter of great controversy but thats not
too important right now. The bottom line is, does the A/C remove enough heat
from the interior of the vehicle to make it comfortable for you to sit in
after a few minutes?? If it is, I wouldn't worry too much about it Remember
though, it may take as much as 15 minutes to acheive proper temerature inside
the vehicle on a hot summer day.
One other thing though, Fords are famous for requiring whats called a
reseal. basically they need to have the O-ring seals at the condensor and
accumulator replaced and have the system recharged. It seems the connections
vibrate under normal usage and Freon will gradually slip out, albeit at a
higher rate than most other systems. The only way to cure this is to purchase
a set of clamping blocks that will make the connections leak proof, to a
point, made of aluminium that will prevent the normal vibrations of use
causing the Freon to leak. I don't remember where I saw them for sale but I
think they can be found in a Murray Temp catalog.....I'm not quite sure
though. The next step beyond that is to install the new style barrier hoses
that have an impregnable teflon liner. Those are a definite improvement over
the factory items but they are a bit pricey. Then again, how much does it
cost to recharge the A/C system on an almost yearly basis?? With the demise
of R12 in the very near future, it may make sense to prevent any further
leakage and keep the more efficient refrigerant in the system.
I hope this is helpful.....
Joe
Email address:
(email redacted)
<< My little quote....IF you had everything, where would you put it?? >>
- --- end forwarded message ---
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