Cutting out ac box but leaving the heat? - Team Camaro Tech
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post #1 of 16 (permalink) Old Apr 14th, 02, 04:29 PM Thread Starter
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I have a sec. gen. and am wondering if i can cut out that huge ac box but leave the blower motor part on and leave the heater core outlets on. My idea was to cut off the box right before the heater core outlets, then take off the rest of the box, then put a plate over the ac hole on the firewall, and another plate between what is left of rest of the box and the firewall to block off the blowermoter and heater core outlets, I want to do this because i love my heat but can't stand that big old clunky ac box!??
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post #2 of 16 (permalink) Old Apr 14th, 02, 06:07 PM
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My wife just bought a 73 Camaro that had all the underhood AC removed. The guy removed the blower housing too, as far as I can tell.
I think the blower pulls air from the cowl plenum and needs a metal firewall housing to push the air through a hole in the firewall and into the heater core. It looks like the under dash stuff is all the same as a non AC car.
I need to see what the firewall box looks like for a non AC Camaro.

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post #3 of 16 (permalink) Old Apr 14th, 02, 06:55 PM Thread Starter
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I was going to leave the blower housing,and part of the heater core housing, i was going to cut right at where the heater core outlets are. So all the heat stuff would stay intact, but the bulkiest part=the ac would be gone, the blower motor is way in the corner under the fender.
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post #4 of 16 (permalink) Old Apr 15th, 02, 12:25 AM
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Ok, what your saying is that if I block off both of those holes that I made. The one in the fire wall where the old ac box I ripped out was, and where there other end is...

I'll still have heat? (Please say yes)

oh yeah this was on a 79 Z-28

<LI>1979 Z-28, 350- Edelbrock Performer RPM Package- TH350
<LI>2000 Gmc Sonoma - 5-speed 4.10 rear[/list]
post #5 of 16 (permalink) Old Apr 15th, 02, 07:00 AM Thread Starter
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I don't understand what you are saying, there should be one hole wherer the ac is that is it. If you took out your heater core or the blower motor, it wont work.
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post #6 of 16 (permalink) Old Apr 15th, 02, 09:50 AM
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Not trying to confuse you man...All I took out was the ac box...I cut it off at the heater hose's. So everything is still intact.
post #7 of 16 (permalink) Old Apr 15th, 02, 07:29 PM Thread Starter
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That is exactly what my question is about! I am figuring that you can use your heat just save the wiring that goes to your heater box, should be two wires into one plug, then leave your hoses connected and it should work, you might want to put a plate where the ac hole is, other wise you will get hot air from the engine bay when your switch is on ac
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post #8 of 16 (permalink) Old Apr 16th, 02, 04:11 AM
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Heat and A/C systems in Camaros (and probably 90% of all cars)draw air in throught the cowl area, through the fan out under the fender, across the duct in the engine compartment and in to the car through a hole in the firewall. A/C systems put the evaporator (the part that cools the air) out in the engine compartment because it is to big to fit under the dash. Air is always passing through the evaporator whenever the fam is blowing whether or not it is being cooled. From there it goes to the duct work under the dash. When the lever is in the A/C position the air bypasses the heater core and goes directly to the dash vents because there is a big damper just inside the hole in the firewall that closes off the heater core. When the levers are in Vent or Heat the damper closes of the air supply to the dash vent, and routes it through the heater before sending it to the vents.

If you cut off the engine side box and remove the evaporator there is no way for the air to get from the fan to the underdash ducting. Plus the blower motor resistors (controls the various fan speed) is mounted in the box right next to the evaporator. If you remove the duct or evaporator box in the engine compartment there is no way to get the air from the fan for the dash ductwork.

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post #9 of 16 (permalink) Old Apr 16th, 02, 05:35 AM
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the easiest- and best- way to do it would be to find a Camaro or firebird in the junkyard with a standard, non AC heater, and take everything associated with the heater. don't forget the controls. not 100% sure, but 75-79 Nova's might be the same, except for the in dash controls.
going this route would clean up a lot of clutter- the bulky AC box, vacuum lines, a few wires. and it would look nice and "factory", unlike if you chopped the AC box up and made it work.

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post #10 of 16 (permalink) Old Apr 16th, 02, 09:06 AM Thread Starter
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I was told in a different post that that wouldn't work because the hole in the firewall is bigger on ac cars
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post #11 of 16 (permalink) Old Apr 16th, 02, 11:13 AM
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My 69 is originally an air car it has all been removed and I assume replaced with the non air set up it looks as an original non air car would except you can see the outline of whwere the suitcase used to be it was done before I got it so I cant help you out on how but I can email you pic or 2 if you like. Mike
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post #12 of 16 (permalink) Old Apr 16th, 02, 04:42 PM Thread Starter
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That is interesting, does anyone else have any info on if this is possible?
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post #13 of 16 (permalink) Old Apr 16th, 02, 07:22 PM
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Hey 3Dude could you send me the pics?

My car was an AC car and I am looking at going with an aftermarket(Vintage air) system to help clean up the engine bay and still be able to have AC. Also doing this since most of my AC stuff is long gone.

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[This message has been edited by ace841 (edited 04-16-2002).]
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post #14 of 16 (permalink) Old Apr 16th, 02, 07:23 PM
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My AC suitcase was cut down to about 3" thick and then glassed over flat. The ignition box and coil are mounted to the flat part. The heater and fan was left intact and works fine. Sounds hokey but actually was done pretty well. The glass has a texture to it similar to the suitcase box and is painted black to match the firewall. You have to look close to tell it didn't come that way.

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post #15 of 16 (permalink) Old Apr 17th, 02, 03:25 AM
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If you elect to cut down the evaporator box, and yours is not broken, see if someone wants to trade. It would be a shame to cut down a good piece.
Many inside halves are broken in the process of engine swaps. The aftermarket halves do not look anything like the original. The shape is correct, but the color/texture is different.
Remember that B/B and S/B are different.
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