993 A/C upgrade...
#1
Racer
Thread Starter
993 A/C upgrade...
I just moved to Texas and Im DREADING the impending heat coming up, which sometimes starts as early as February.
I want to upgrade my AC, I wants SUPER performance in cooling. What parts do you guys suggest replacing? Whats a good aftermarket company that can help me with this?
Thanks,
Leon
I want to upgrade my AC, I wants SUPER performance in cooling. What parts do you guys suggest replacing? Whats a good aftermarket company that can help me with this?
Thanks,
Leon
#2
993's are R134a, so no conversion option on refrigerant.
They also have the serpentine version condenser.
Most of the hose lines are metal however there are a few rubber sections
you'll want to inspect:
at the compressor,
at the condenser,
Assuming your car is several years old now chances are it had lost refrigerant and refrigerant oil at some point. Logical thing to do is to take it to a shop and throw on some gauges and get some readings, at idle:
low side & high side pressure, and note the ambient temp at the time,
best to this when the ambient is 80F or more.
Common failure in the refrigerant circuit is the evaporator, so here is a chance for an upgrade, such as this:
Kuehl Evap
at the same time you'd want to replace your drier and might as well hit all the orings while your at it, along with adding some PAG oil at recharge.
They also have the serpentine version condenser.
Most of the hose lines are metal however there are a few rubber sections
you'll want to inspect:
at the compressor,
at the condenser,
Assuming your car is several years old now chances are it had lost refrigerant and refrigerant oil at some point. Logical thing to do is to take it to a shop and throw on some gauges and get some readings, at idle:
low side & high side pressure, and note the ambient temp at the time,
best to this when the ambient is 80F or more.
Common failure in the refrigerant circuit is the evaporator, so here is a chance for an upgrade, such as this:
Kuehl Evap
at the same time you'd want to replace your drier and might as well hit all the orings while your at it, along with adding some PAG oil at recharge.
#5
Addict
Rennlist
Lifetime Member
Rennlist
Lifetime Member
My 993 will not cool the center vent air below 50 degrees*, which I believe is an expansion valve set at too high a temp. Nevertheless, it still will cool fine at over 100+ degrees outside but requires a higher fan speed than if the temps were lower. (Nosier too.) It has never been serviced since I bought it in 2000 as the temps have always been this way.
You might check this element out if you take the car to a shop.
*My BMW vents at 35 degrees and the 997 is closer to 42 degrees, but don't remember exactly)
You might check this element out if you take the car to a shop.
*My BMW vents at 35 degrees and the 997 is closer to 42 degrees, but don't remember exactly)
#7
Rennlist Member
Welcome!
What part of Texas are you in? We are a big state. Dallas, where I am, is drier than say, Houston. If you are in Houston, it is hot and humid. Good luck!
What part of Texas are you in? We are a big state. Dallas, where I am, is drier than say, Houston. If you are in Houston, it is hot and humid. Good luck!
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#8
#9
Rennlist Member
My 993 will not cool the center vent air below 50 degrees*, which I believe is an expansion valve set at too high a temp. Nevertheless, it still will cool fine at over 100+ degrees outside but requires a higher fan speed than if the temps were lower. (Nosier too.) It has never been serviced since I bought it in 2000 as the temps have always been this way.
You might check this element out if you take the car to a shop.
*My BMW vents at 35 degrees and the 997 is closer to 42 degrees, but don't remember exactly)
You might check this element out if you take the car to a shop.
*My BMW vents at 35 degrees and the 997 is closer to 42 degrees, but don't remember exactly)
#11
Addict
Rennlist
Lifetime Member
Rennlist
Lifetime Member
I have an aluminized cover just for the roof and windows that does a great job on hot days and is easy to put on. Much easier than a full car cover for shorter stops.
I bought it years ago for my 1986 911, and it fits the 993 perfectly - does anyone still make these?
I bought it years ago for my 1986 911, and it fits the 993 perfectly - does anyone still make these?
#12
RL Community Team
Rennlist Member
Rennlist Member
All great ideas above, my experience with the 911 is that only so much improvement can be done by lowering vent outlet temperatures. It can never go down near freezing as ice will form in the system. The amount of glass, the engine heat soaking of the body are the major contributing issues. Low cost suggestions include adding a cut to fit a space blanket behind the rear seat as an insulator or find a way to duct air directly from the under dash front air handler through a tube to aim directly on your legs in the front seat. Also minimize sitting heat soak by putting shades in the windows when the car is parked.
Andy :-)
Andy :-)
Last edited by pp000830; 12-08-2012 at 06:18 PM. Reason: typos
#14
Drifting
Consider some of the newer hi-tech window films that have been discussed recently. 3M Crystalline is an option, plus others. Lower interior temps and UV infiltration with a minimal change in the darkness of the windows.
#15
Racer
Thread Starter
Absolutley! I do have the Hüber Optik ceramic window tint, its a german product that is placed on the windshield of the NASA space shuttle. Its top of the line. However, good AC is a must. Im thinking of a solid upgrade on everything.
My 993 is a DD and I've made the existential decision to keep it forever (assuming I never need to sell it). So might as well put some money into the AC system.
Im in Austin, Texas. Thanks Dallas fellas for the Cars and Coffee invite! One day soon!
My 993 is a DD and I've made the existential decision to keep it forever (assuming I never need to sell it). So might as well put some money into the AC system.
Im in Austin, Texas. Thanks Dallas fellas for the Cars and Coffee invite! One day soon!