[Tyrannous]

ok so i was hoping someone around here would have some knowledge on this.

i have a 73 cadillac, ive taken the A/C compressor out, because i put a new intake manifold in, effectively getting rid of my A/C... but with these winter months coming, ive discovered my heat also does not work. the blower motor works strong as it should. i believe the problem to be with the climate control switch, where you set the temp and set where the air goes (vent, hi, low, defog). what i would like to do, is just have a simple switch, to turn the warm air on or off, and defog (out of the dashboard to the windshield) or the main vent. maybe there are replacements for this part?

ill post a picture of it later. anyone have any ideas?

 

[Tyrannous]

 

[caddydaddy]

Does the water control valve work ok? You didn't disconnect the vaccuum line to it when you installed your intake, did you?
My '79 has plenty of heat without an A/C compressor.

 

[Night Wolf]

without AC your defroster is going to work like crap... it used dehumidified air to clear the fog, no AC, it can't do that... personally loosing AC on a Cadillac isn't worth a couple extra ponies.

 

[caddydaddy]

I'm sure the HP gain wasn't the reason for getting rid of the A/C compressor. The stock compressor won't fit the Edelbrock intake, and I'm sure that is the reason he doesn't have it now. That is the same reason my '79 doesn't have an A/C compressor! The newer style compressors work with the Edelbrock intake, but I just haven't gotten one yet!

 

[brougham]

without AC your defroster is going to work like crap... it used dehumidified air to clear the fog, no AC, it can't do that... personally loosing AC on a Cadillac isn't worth a couple extra ponies.

Not having working air conditioning isn't going to make any difference for that. If the defroster is working properly it'll take the frost off the windshield just fine.

 

[Tyrannous]

thanks caddydaddy ill check the vaccum lines, your right about me losing the compressor because of the intake height. its getting cold i hope i can figure this out...

 

[Katshot]

Not having working air conditioning isn't going to make any difference for that. If the defroster is working properly it'll take the frost off the windshield just fine.

Very true but in the winter "Humidity" is a major issue and THAT is what you need the compressor for. To handle the humidity. It will de-FROST the windows but it won't de-FOG them worth a damn. Try getting in the car with snow and ice on you. As soon as the heater warms that and turns it into moisture, the inside of the windows will fog heavily and without the compressor, you're SOL. I'm with Night Wolf.

 

[brougham]

I never had that problem or at least not enough to make me complain about it. It'll fog up a bit before the car gets warmed up and the defroster starts working but after that it's fine so I still wouldn't say it'll make the defroster work like crap. Then again I've never driven my Cadillac in the winter so maybe it is an issue with them.

 

[Night Wolf]

IMO... unless we are talking huge hp/tq. numbers and massive amounts of parts slapped on a BB Cad.... a modified 1st gen 472 intake manifold is better then Edelbrock.... yeah the Edelbrock looses 22lbs, and it isn't a low riser... with with the 472 intake, it'll flow nearly as good, look completly stock (big thing for me) you CAN mount the AC compressor... while still having a high flowing manifold..... and its about 1/4 the price when all is said and done.

 

[Night Wolf]

Very true but in the winter "Humidity" is a major issue and THAT is what you need the compressor for. To handle the humidity. It will de-FROST the windows but it won't de-FOG them worth a damn. Try getting in the car with snow and ice on you. As soon as the heater warms that and turns it into moisture, the inside of the windows will fog heavily and without the compressor, you're SOL. I'm with Night Wolf.

yup.

my mothers '89 Brougham, the AC quite... and even in the rain, that windsheild fogs up bad... its not safe, she has to keep a towel in the car and always wipe down the windshield.

the first season I got the Olds, the AC had no charge, and it would melt the ice, yeah, but it woudln't remove the fog very well... we did a simple convert and charged her up with R-134A, and the fog goes away quick now.

cars with no AC from the factory you may ask? well, sucks for them.... they have an issue with removing fog.... AFAIK there is no other effective way.

 

[Tyrannous]

im not really concerned with defogging... in my expirience with my other 73 caddy that had no ac compressor, i am more concerened that the defog blower doesnt even come on when switched. it seems the climate control switch only turns on the floor blower. in my expirience the heat gets so hot that it warms the windshield, thus any humidity or ice will melt and evaporate. caddy heat can killl...