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Adding a Vintage Air to my 73. I live in Florida, and figured how often would I need heat. Thought it would be a bit more tidy in the engine bay w/o the heater hoses. A friend explained that on a rainy day (which I hope to avoid) I might get condensation on the interior glass if the heater is not part of the system. What do you guys think? As always, thanks for the great help.
I have no A/C......I had to keep a hand towel in my car because the inside-windshield would get so foggy that I had to dry it to be able to see. I repaired the heater system so that it worked with the defroster ducting at the windshield.
You can install a second cutoff valve in the heater inlet hose to prevent the floorboard from getting hot because of the heater core having hot coolant inside it.
Last edited by doorgunner; Jan 28, 2016 at 04:04 AM.
Air flow from the fan does more to evaporate condensation than the temperature of the air. I capped my heater core and removed the hoses because I'm going for maximum weight loss and I only drive during our dry season April through October. Not my daily driver. Here's the engine bay a couple years ago before I started on the suspension. I enjoy not having the hoses in the way!
Thanks for the responses, but still not sure if it is important to have the heater function with the AC.
I guess I meant to say that running the A/C will dry the air very quickly even if run at a cool temperature. The effect of it is to remove moisture from the air and drain it out to the ground. Heating the air does allow the air to hold more moisture but with only a little effect in defogging the glass.
I guess if you don't want the heater hoses then pull them. But if you want heat, keep 'em.
Some of my vendors are water damage restoration people. They've taught me that airflow and dehumidifiers (same as A/C) dries up the water damage in a carpet. Heat does nothing.
Yes, the heater core tempers the cold air using stepper motors attached to a flapper. The GM units used a plenum flapper controlled by a cable.
The Gen IV Vintage Air does NOT need heated water from the engine to control the AC temp.
I'm not running a heater plus running an electric compressor and made positive no heater was required.
I did add heated seats...
I also make up a defroster system w/ a basically a couple of 12V hair dryers. In 30 seconds the air temp from the defroster vent is over 90º. Peaks about 110º- from a room temp of 60º It doesn't move as much air as I would like -but better than nothing. Plus can always put the Rain X Anti- fog on the windshield.
I am using the defroster output for the pass side AC and the AC for the driver side- so I'll have left and right as needed ...My dash is totally custom...
In the car-
Last edited by Richard454; Feb 1, 2016 at 02:55 PM.
Frank, I am in S FL for 40 yrs. Have driven lots of old cars without heaters. If you are planning to use the vette only on nice days, then nix the heat. HOWEVER, getting caught in a gator gusher, especially at night, might be a challenge to keep the ws clear with cold air.
As to the thought that cold air is good to clear moisture, then why are hair driers HOT?
See page two- Thermostat adjusts compressor cycle time
You would not need heated air -you'd turn the thermostat towards heat- and the compressor cycles less....keep turning the thermostat and cabin air will flow through the "room temperature" heater core.
Ok, I can understand using ambient temperature air to temper cooled air. And the system does have a valve that restricts heater fluid from entering the unit while it is in the "cool" mode.
Ok, I can understand using ambient temperature air to temper cooled air. And the system does have a valve that restricts heater fluid from entering the unit while it is in the "cool" mode.
The electronic water shut-off valve keeps the water from flowing into the heater core. HOWEVER unless you have BOTH hoses turned off the heater core will eventually be 180º as well- thanks to thermal conduction.
See page two- Thermostat adjusts compressor cycle time
You would not need heated air -you'd turn the thermostat towards heat- and the compressor cycles less....keep turning the thermostat and cabin air will flow through the "room temperature" heater core.
Richard
Thanks very much for your help on this puzzle. Do you think setting up w/o the heater will make defogging the windshield a problem? I'm guessing it would still defog the glass, just not as fast.
Heater or no heater
One easy solution!!