C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

How to make my AC cooler?

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Old Aug 20, 2007 | 10:53 AM
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Default How to make my AC cooler?

Ok I replaced my AC compressor,dryer,orfice tube, and AC works COLD. But when I got home, the car sat in the sun for a long time before I used it again, and when I turn the AC on, it takes a LONG time to get cold. But when theres shade outside and not so hot its gets cooler alot faster. How can I always keep it cool all the time or faster in Hot weather?
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Old Aug 20, 2007 | 10:55 AM
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It takes a while to cool down a hot interior, especially if its dark color
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Old Aug 20, 2007 | 10:59 AM
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The cars with glass tops take longer to cool down, too.

Also, keep in mind the A/C system pressures will also vary due to ambient temperatures and relative humidity.

As ambient temp and humidity go up so do the system's pressures and the A/C's vent outlet temp.

Last edited by onedef92; Aug 20, 2007 at 11:04 AM.
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Old Aug 20, 2007 | 10:59 AM
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my interior is beige/tan color and gets HOT, but would wrapping the lines make it cooler?
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Old Aug 20, 2007 | 11:21 AM
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Originally Posted by onedef92
The cars with glass tops take longer to cool down, too.

.
Noticed a huge difference replacing the glass top with the solid. Much cooler inside.
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Old Aug 20, 2007 | 11:26 AM
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I wrapped my a/c lines (cold side) with some pipe insulation and noticed a significant difference.
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Old Aug 20, 2007 | 11:28 AM
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Originally Posted by BlackVette00
my interior is beige/tan color and gets HOT, but would wrapping the lines make it cooler?
There was a recent thread on this, one member measured a 1° difference with them wrapped. Based on that I decided not to bother. Have you checked the evap core at all? Mine was blocked.

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Old Aug 20, 2007 | 11:29 AM
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Holy smokes!! Where is that located?
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Old Aug 20, 2007 | 11:39 AM
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Picture is the Evaporator Core - It has a foam filter from the factory and often, when they look like that, it's leaking with the oil destroying the filter and restricting air flow.

Assuming you have the equipment, post the operating pressures and vent temps noting the outside air temp. You might also determine the cutoff threshold for the low pressure switch. Put it on MAX and disconnect the Blower Motor. That will drop the low side. Note the pressure the compressor cutsoff at.
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Old Aug 20, 2007 | 11:52 AM
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There is a limit to how cool you can go.
If the evaporator core is lower than about 32*F, it will freeze the moisture on it and plug up.
32* at the evaporator core translates into about 40* at the vent outlets.
If you can achieve 38*~ 40* at the vent outlets in recirclulate with the blower going full blast, that is about as good as it gets.

Tom Piper
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Old Aug 20, 2007 | 11:54 AM
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how about the condensor, can it get clogged?
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Old Aug 20, 2007 | 12:27 PM
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Originally Posted by cuisinartvette
Holy smokes!! Where is that located?
You can see it and take pix if you loosen the passenger wheel well and pull out the blower motor.
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Old Aug 20, 2007 | 01:30 PM
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In south Florida, after sitting in the sun all day, the interiors get real hot. Vettes have a large glass exposure (windshild, two side windows and the hatch) to the sun. A dark, reflective tint helps alot.
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Old Aug 20, 2007 | 03:41 PM
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Originally Posted by BlackVette00
How can I always keep it cool all the time
Never shut the engine and the AC off?

I dunno...


Larry
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often wrong, never in doubt....
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Old Aug 20, 2007 | 04:04 PM
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Originally Posted by cuisinartvette
It takes a while to cool down a hot interior, especially if its dark color

....
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Old Aug 20, 2007 | 04:06 PM
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.....wasn't there already a post on "wrapping" a/c lines a few weeks ago?
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Old Aug 20, 2007 | 04:56 PM
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Originally Posted by Da Mail Man
.....wasn't there already a post on "wrapping" a/c lines a few weeks ago?
There are no new questions!!
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Old Aug 20, 2007 | 05:00 PM
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Originally Posted by InHot
There are no new questions!!
.....and your point?....nobody asked for any new questions, just information (answers) about the subject matter which is currenly reflected in a previous thread(s).......
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Old Aug 20, 2007 | 10:14 PM
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What's the best way to get in there to clean it??
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Old Aug 20, 2007 | 10:25 PM
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Originally Posted by 89 Bob L
What's the best way to get in there to clean it??

........the evaporator or condenser?
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