Ideas to deal with the Texas heat in my rex.
My routine now is to:
1) Park the car facing the sun if I cannot find shade
2) Block the front window with a shade
3) Crack both windows about an inch
4) Open the sunroof to the vent position
However, the car still gets hot and my R134a AC takes awhile to cool even on max. So I have some ideas:
1) I looked into those solar window ventilators but I want something that works automatically. I don't want to have to stick the thing in the window each time.

I have purchase a couple of small squirrel cage radial fans to play with. I want to mount the out of the way to blow in/out air while the car is off and the ambient temperature is above 85F. I am thinking of mounting two Hawker batteries in the toolbox behind the seats with a relay. Both will be charged while driving, but only one will be used to power the ventilation fans when the car is off.
2) Fabricate a transparent plastic divider to fit behind the seats in order to isolate the heat back there. The AC would only be cooling the front half.
3) Mount some sort of shade curtain that can be rolled down under the hatch glass for when the rear will be facing the sun.
4) Add insulation throughout the cabin.
5) Replace/Refurb/Upgrade the blower. I think it may be old like me. I wonder if you could modify the juice going to it to get it to blow harder.
6) Go retro with a rear louver. :lol:
1) Park the car facing the sun if I cannot find shade
2) Block the front window with a shade
3) Crack both windows about an inch
4) Open the sunroof to the vent position
However, the car still gets hot and my R134a AC takes awhile to cool even on max. So I have some ideas:
1) I looked into those solar window ventilators but I want something that works automatically. I don't want to have to stick the thing in the window each time.

I have purchase a couple of small squirrel cage radial fans to play with. I want to mount the out of the way to blow in/out air while the car is off and the ambient temperature is above 85F. I am thinking of mounting two Hawker batteries in the toolbox behind the seats with a relay. Both will be charged while driving, but only one will be used to power the ventilation fans when the car is off.
2) Fabricate a transparent plastic divider to fit behind the seats in order to isolate the heat back there. The AC would only be cooling the front half.
3) Mount some sort of shade curtain that can be rolled down under the hatch glass for when the rear will be facing the sun.
4) Add insulation throughout the cabin.
5) Replace/Refurb/Upgrade the blower. I think it may be old like me. I wonder if you could modify the juice going to it to get it to blow harder.
6) Go retro with a rear louver. :lol:
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Have you made sure you're getting the most out of your AC?
You could try cleaning the coils. After cleaning the condenser coil it will reject heat better. The end result is cooler refrigerant being fed to the evaporator.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dewarcr »</TD></TR><TR><TD CLASS="quote">
5) Replace/Refurb/Upgrade the blower. I think it may be old like me. I wonder if you could modify the juice going to it to get it to blow harder.
</TD></TR></TABLE>
maybe it needs to be cleaned too. If the coil is plugged or there's dirt in the blower wheel you won't move as much air. After it's cleaned it will absorb more heat and velocity might increase.
Check the belt and hi/lo side pressures.
The car is absorbing radiant heat when the sun is baking it. Adding window tint slows this process.
You could try cleaning the coils. After cleaning the condenser coil it will reject heat better. The end result is cooler refrigerant being fed to the evaporator.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dewarcr »</TD></TR><TR><TD CLASS="quote">
5) Replace/Refurb/Upgrade the blower. I think it may be old like me. I wonder if you could modify the juice going to it to get it to blow harder.
</TD></TR></TABLE>
maybe it needs to be cleaned too. If the coil is plugged or there's dirt in the blower wheel you won't move as much air. After it's cleaned it will absorb more heat and velocity might increase.
Check the belt and hi/lo side pressures.
The car is absorbing radiant heat when the sun is baking it. Adding window tint slows this process.
my rex stays cool under its full car cover
the car stays reasonably cool even in sticky-july-georgia summer weather and the wax job lasts longer too, you know
the car stays reasonably cool even in sticky-july-georgia summer weather and the wax job lasts longer too, you know
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mr_valentino20032000 »</TD></TR><TR><TD CLASS="quote">were can someone find one of these for a CRX?</TD></TR></TABLE>
Out of respect for the beauty of CRXs, I will not tell you.
Out of respect for the beauty of CRXs, I will not tell you.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eda6 »</TD></TR><TR><TD CLASS="quote">Have you made sure you're getting the most out of your AC?
You could try cleaning the coils. After cleaning the condenser coil it will reject heat better. The end result is cooler refrigerant being fed to the evaporator.
maybe it needs to be cleaned too. If the coil is plugged or there's dirt in the blower wheel you won't move as much air. After it's cleaned it will absorb more heat and velocity might increase.
Check the belt and hi/lo side pressures.
The car is absorbing radiant heat when the sun is baking it. Adding window tint slows this process.</TD></TR></TABLE>
I've got the tint and it does help. The pressure and belts are fine. I have a new compressor and condensor (fender bender killed the last one). I have been putting off working upside down on the passenger side in 100F heat. Maybe it is time to suck it up and check out the blower and evaporator.
Modified by dewarcr at 2:00 PM 7/4/2005
You could try cleaning the coils. After cleaning the condenser coil it will reject heat better. The end result is cooler refrigerant being fed to the evaporator.
maybe it needs to be cleaned too. If the coil is plugged or there's dirt in the blower wheel you won't move as much air. After it's cleaned it will absorb more heat and velocity might increase.
Check the belt and hi/lo side pressures.
The car is absorbing radiant heat when the sun is baking it. Adding window tint slows this process.</TD></TR></TABLE>
I've got the tint and it does help. The pressure and belts are fine. I have a new compressor and condensor (fender bender killed the last one). I have been putting off working upside down on the passenger side in 100F heat. Maybe it is time to suck it up and check out the blower and evaporator.
Modified by dewarcr at 2:00 PM 7/4/2005
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sam385 »</TD></TR><TR><TD CLASS="quote">my rex stays cool under its full car cover</TD></TR></TABLE>Really? I have one of those. I use it at home but not out and about. Seemed like it was a bit of work to put it on everytime.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 99teggsr »</TD></TR><TR><TD CLASS="quote">get a windshiled sun visor also, mine keeps it atleast 15 degrees cooler when its been sitting. </TD></TR></TABLE>That's what I meant by block the front windshield with a shade. I got one of those foil ones that you do the quick wrist action to fold into a small round shape. Very nice. Made for vans and stuff so it completely covers the front window. If the rear is facing the sun, I will sometimes wedge it back there instead. Makes a big difference.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eda6 »</TD></TR><TR><TD CLASS="quote">You could try cleaning the coils. After cleaning the condenser coil it will reject heat better. The end result is cooler refrigerant being fed to the evaporator.</TD></TR></TABLE>
Can you elaborate on this? My AC is OK, but getting more out of it sounds good. I found in the Helms some info on overhauling the evaporator, but it says to discharge the system before getting into it to clean out the fins...can it be done without discharging?
Can you elaborate on this? My AC is OK, but getting more out of it sounds good. I found in the Helms some info on overhauling the evaporator, but it says to discharge the system before getting into it to clean out the fins...can it be done without discharging?
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fireant »</TD></TR><TR><TD CLASS="quote">
Can you elaborate on this?</TD></TR></TABLE>
Clean coils help to maximize heat transfer and keep the compressor cool. The compressor is cooled by refrigerant vapor.
The condenser rejects heat (heat from the evaporator/heat of compression). Dirt, bugs, leaves, etc..get trapped in the condenser coil. After the refrigerant passes thru the condenser coil it's supposed to be subcooled before it returns to the metering device. With a dirty condenser coil subcooling doesn't occur resulting in a warmer evap coil temp and decreased system capacity.
The evaporator absorbs heat (liquid refrigerant is fed from the metering device to the evaporator where it's vaporized). Since there isn't an air filter before the coil, the coil doubles as an air filter. Eventually the coil becomes dirty. Reduced airflow and heat transfer is the result. If the refrigerant can't vaporize, the compressor sees liquid. We all know that you can't compress a liquid.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fireant »</TD></TR><TR><TD CLASS="quote">I found in the Helms some info on overhauling the evaporator, but it says to discharge the system before getting into it to clean out the fins...can it be done without discharging?</TD></TR></TABLE>
To do a good job the evaporator needs to be removed. Cap off the lines using brass caps, then use high pressure warm water to clean the coil.
Can you elaborate on this?</TD></TR></TABLE>
Clean coils help to maximize heat transfer and keep the compressor cool. The compressor is cooled by refrigerant vapor.
The condenser rejects heat (heat from the evaporator/heat of compression). Dirt, bugs, leaves, etc..get trapped in the condenser coil. After the refrigerant passes thru the condenser coil it's supposed to be subcooled before it returns to the metering device. With a dirty condenser coil subcooling doesn't occur resulting in a warmer evap coil temp and decreased system capacity.
The evaporator absorbs heat (liquid refrigerant is fed from the metering device to the evaporator where it's vaporized). Since there isn't an air filter before the coil, the coil doubles as an air filter. Eventually the coil becomes dirty. Reduced airflow and heat transfer is the result. If the refrigerant can't vaporize, the compressor sees liquid. We all know that you can't compress a liquid.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fireant »</TD></TR><TR><TD CLASS="quote">I found in the Helms some info on overhauling the evaporator, but it says to discharge the system before getting into it to clean out the fins...can it be done without discharging?</TD></TR></TABLE>
To do a good job the evaporator needs to be removed. Cap off the lines using brass caps, then use high pressure warm water to clean the coil.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dewarcr »</TD></TR><TR><TD CLASS="quote">Out of respect for the beauty of CRXs, I will not tell you.</TD></TR></TABLE>
Since someone asked a questions and you were no help what so ever here is the link for the louvers
http://www.sfxperformance.com/..._id=2
Since someone asked a questions and you were no help what so ever here is the link for the louvers
http://www.sfxperformance.com/..._id=2
I LOVE LOUVERS!!!
BUT, I think they look MUCH better on the 84-87 CRXs.
Onthe 88-91s, I think it would just look out of place. They're not boxy enough for them.
I saw an old lady driving around w/ Louvers on an old Rex. It was so badass.
Also, those solar window vents look cool. I can't imagine it'd be too much harder to put on than it is to roll down the windows...
BUT, I think they look MUCH better on the 84-87 CRXs.
Onthe 88-91s, I think it would just look out of place. They're not boxy enough for them.
I saw an old lady driving around w/ Louvers on an old Rex. It was so badass.
Also, those solar window vents look cool. I can't imagine it'd be too much harder to put on than it is to roll down the windows...
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kulangot »</TD></TR><TR><TD CLASS="quote">at leased you have ac...i have no tint and no ac in TX...</TD></TR></TABLE>
My prayers are with you, sir!
My prayers are with you, sir!



and get that really ugly chrome window tint.
