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Questions for the A/C Crowd
Posted by: Wagon Master ()
Date: February 01, 2018 03:40PM

1. Earlies and 65's had the condenser located above the engine with the dryer in that general area. In 66 they moved the condenser to the firewall and the dryer to the trunk. Installing A/C in a 69. Is there an advantage to having the dyer in one location over the other? At this point it can go either place.
2. Not having mocked up the compressor yet, if the dryer is in the trunk and you go with the low mount Sanden compressor, is the still no room for a regular spare tire in the engine compartment?
Thanks


'29 Ford Model A Tudor
'61 700 Lakewood 110 4 speed
'69 Monza Convert. 140 Auto.
'70 Dodge Challenger R/T 440 4 speed

Been aircooled since 1973
Northwest Ohio

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Re: Questions for the A/C Crowd
Posted by: Lane66m ()
Date: February 01, 2018 04:14PM

I am putting the dryer in the engine compartment. Spare is going to the trunk. Spare is a 1992 Camaro Space Saver wheel and tire.

Al Lane
Ellabell GA

1966 Monza Coupe, 110 hp, 4 Spd
1968 Camaro SS Coupe 350 CI 295+ HP PG
1964 Greenbrier Deluxe, 6 dr, 80 hp car engine, PG
2015 Chevrolet Malibu 2LT
2018 Chevrolet Silverado LTZ Z71 Centennial Edition
1947 Farmall A tractor 15 hp


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Re: Questions for the A/C Crowd
Posted by: aircooled6 ()
Date: February 01, 2018 04:35PM

Wagon,

If memory serves, I think the spare in the engine room would be snug, even with the low-rise sanden adapter. How you route the hoses in/out of the compressor would make a difference, too. Of course, if you used a skinny donut tire and made a spacer to make it sit a little higher than normal, it just might fit.

Everett Wilson
North Richland Hills TX
(Now, South of 820!!)
64 Greenbrier 110 with 95 heads/PG

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Re: Questions for the A/C Crowd
Posted by: coleslaw31 ()
Date: February 01, 2018 04:37PM

IM going stock setup for 66/67 so the dryer in the trunk. Can’t say it’s better or not functioning wise but most don’t like it for the room it takes up in the trunk. Factory it went behind the spare in the trunk.

South Carolina Upstate



68 Monza convertible 140 4spd A/C (coming soon)
66 Corsa coupe 140 4spd

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Re: Questions for the A/C Crowd
Posted by: azdave ()
Date: February 01, 2018 05:41PM

Our 65 4-dr came with a 66 condenser swap but the receiver/dryer is still in the rear like a 65. Can't say I've noticed any issues. I'm still running the Frigidaire boat anchor compressor too and I don't use an idle-up solenoid.

for comparison, blue car photo is a mostly stock 65 4-dr with factory A/C.

White car is our 65 4-dr with 66 condenser.


Dave W. / Gilbert Arizona
66 Corsa 140 4-speed w/factory A/C
66 Corsa 140 4-speed
65 Corsa 140 4-speed
66 Corsa 455 Toro V8
65 Monza 455 Toro V8
65 Monza 110 Convertible
65 Monza 4DR 140 PG w/factory A/C
65 Monza 4DR EJ20T w/5-speed




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Re: Questions for the A/C Crowd
Posted by: bgriffith ()
Date: February 01, 2018 05:56PM

If you're going to mount a firewall or trunk condenser, put it in the trunk.

Britt Griffith
Corona, CA
---------------
65 110 Coupe

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Re: Questions for the A/C Crowd
Posted by: john.jackson ()
Date: February 01, 2018 06:03PM

In 1971/72 I installed A/C in my 1969 Monza Coupe. I used the factory high mount A/C bracket. The spare tire was mounted in the stock position and cleared the A/C compressor just fine. I mounted the dryer in the trunk and the condenser was a 66+ style in the engine compartment.

This is/was the 1966-67 factory stock location for the A/C system.

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Re: Questions for the A/C Crowd
Posted by: Timothy Shortle ()
Date: February 01, 2018 07:38PM

One reason GM put the receiver drier in the trunk in 66 was it incorporates a diagnostic piece (the sight glass) to determine refrigerant flow as well as if the system was low on charge-"bubbles in the sight glass". You would be unable to check this if the drier was in the engine compartment as the compressor will not engage if the rear deck lid was open.

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Re: Questions for the A/C Crowd
Posted by: steve c goodman ()
Date: February 01, 2018 07:50PM

If the 66 shop manual is consulted you will find that removing a tail light or back up light socket and passing the manifold hoses through it and then sealing the opening is needed. Reason is the engine lid needs closed because all air coming through the condensor is brought from inlet behind rear window and uses the suction/vacuum created by having the fan tuning and pulling the air into the engine bay. It is also mentioned that the need for a perfect seal between body and lid is needed, any leaks will reduce the air pulled through the condensor. Also a switch was incorporated on the engine lid that stopped the compressor from pumping if the lid was raised.

With all of this in mind, the dryer sight glass cannot be watched if mounted in the engine bay so it was moved into the trunk of the car. Out of the two methods of charging A/C back in the day, the small charging hose attached to a can of R-12 was used by most and instead of being able to monitor high/low pressure sides it was common to watch the sight glass, an occasional bubble meant the system was charged.

best wishes, Steve
Rear Engine Spec. Inc. Golden, Colo.

1962 spyder 3.0L turbo---1965 Crown V8
1967 monza 110/4---1968 monza 110/4
1971 amante gt 110/4
CORSA/RMC/PPCC

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Re: Questions for the A/C Crowd
Posted by: steve c goodman ()
Date: February 01, 2018 07:55PM

Sorry all, Tim beat me to the punch and took fewer words to do it.

best wishes, Steve
Rear Engine Spec. Inc. Golden, Colo.

1962 spyder 3.0L turbo---1965 Crown V8
1967 monza 110/4---1968 monza 110/4
1971 amante gt 110/4
CORSA/RMC/PPCC

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Re: Questions for the A/C Crowd
Posted by: Frank DuVal ()
Date: February 01, 2018 08:03PM

That's right. Here is a picture of a 66 with gauges attached. Tape is also needed over the backup lamp hole. No way to see the sight glass if it is in the engine compartment.

The dryer does not care which end of the hose it is installed.

Frank DuVal

Fredericksburg, VA

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Re: Questions for the A/C Crowd
Posted by: azdave ()
Date: February 02, 2018 04:58AM

Frank DuVal Wrote:
-------------------------------------------------------
> No way to see the sight glass if
> it is in the engine compartment.

Seeing the sight glass is not required to charge the system and if you use substitute refrigerants they often tell you to ignore the sight glass indicators anyway.

I use temperature and pressure to determine the charge but I do set it up like Frank shows in his photo since I have the 66 condenser.


Dave W. / Gilbert Arizona
66 Corsa 140 4-speed w/factory A/C
66 Corsa 140 4-speed
65 Corsa 140 4-speed
66 Corsa 455 Toro V8
65 Monza 455 Toro V8
65 Monza 110 Convertible
65 Monza 4DR 140 PG w/factory A/C
65 Monza 4DR EJ20T w/5-speed




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Re: Questions for the A/C Crowd
Posted by: rnch ()
Date: February 02, 2018 05:44AM

Frank DuVal Wrote:
-------------------------------------------------------
> That's right. Here is a picture of a 66 with
> gauges attached. Tape is also needed over the
> backup lamp hole. No way to see the sight glass if
> it is in the engine compartment.
>
> The dryer does not care which end of the hose it
> is installed.


This is also how I check/add freon to my AirVairs.

Removing the tail light is just three speed nuts; no biggie. A couple of pieces of wide duct tape over the hoses & tail light housing gives a temporary, air tight seal.

I have had fully charged systems, according to the gauges and center vent output temperature, that still had occasional "foam" in the trunk mounted sight glass.

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Re: Questions for the A/C Crowd
Posted by: Timothy Shortle ()
Date: February 02, 2018 10:56AM

I have heard the 65 condenser was a bigger unit than 66 (larger capacity, better heat exchanger) and did not require such a well sealed deck lid fit. Obvious drawback is it makes the engine harder to service or even see. Of course there are many arguments over which refrigerant to use (R12, 22, propane?, Freeze 12, etc.) as well as "this is how I have serviced my system for 50 years". My thinking is the service manual for our cars is the best source for information. Others MMV.

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Re: Questions for the A/C Crowd
Posted by: Spectre ()
Date: February 02, 2018 11:08AM

The '65 and earlier didn't require a shut lid to pull air through the condenser because the unit is situated over the fan and having air drawn through it lid open or closed.

As clunky as the 65 and earlier design is, it doesn't look like it would be preheating the carb inlet air like the 66 design does.

David Clamp


1965 Corsa convertible - 140 4spd/3.55/AM-FM

2013 Mustang GT convertible - 5.0, 6spd auto, Procharger i-1

2003 Miata SE - 6spd manual (wife's toy)

"Victory is mine!" - SG

Oklahoma City, OK

Click for Oklahoma City, Oklahoma Forecast

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Re: Questions for the A/C Crowd
Posted by: Caraholic4life ()
Date: February 02, 2018 04:02PM

Timothy Shortle Wrote:
-------------------------------------------------------
> I have heard the 65 condenser was a bigger unit
> than 66 (larger capacity, better heat exchanger)
> and did not require such a well sealed deck lid
> fit. Obvious drawback is it makes the engine
> harder to service or even see. Of course there are
> many arguments over which refrigerant to use (R12,
> 22, propane?, Freeze 12, etc.) as well as "this is
> how I have serviced my system for 50 years". My
> thinking is the service manual for our cars is the
> best source for information. Others MMV.

Food for thought:

A friend of mine has a 1966 factory A/C coupe and recently purchased a new condenser unit for his car.
He told me that is is a style designed to work with the newer 134 freon.

Look at the Clarks reproduction condenser.[www.corvair.com]

Part number C11782: 66-67 R-134 REPRO CONDENSER KIT $322.70
"A brand new 66-67 style that is re-circuited specifically for affordable R-134 and will fit any non-turbo late model in minutes."

There was more information in the Clark's description, but since I could not cut and paste it, I only quoted the first part of the description.

1962 95 F.C. Van
1965 Monza Coupe
Westminster, Maryland

MID ENG enthusiast &
prior Kelmark owner.

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Re: Questions for the A/C Crowd
Posted by: Dan ()
Date: February 03, 2018 03:54PM

I have been told that the early style, up to 65 is more efficient, but the 66 and later style is much easier to live with.

Dan
Chandler, AZ
1966 Corsa Turbo Convertible
[corvaircenter.com]

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Re: Questions for the A/C Crowd
Posted by: bgriffith ()
Date: February 04, 2018 12:45PM

bgriffith Wrote:
-------------------------------------------------------
> If you're going to mount a firewall or trunk
> condenser, put it in the trunk.

I meant to say if you're going to mount a firewall or trunk condenser, put THE RECEIVER/DRIER in the trunk.

Britt Griffith
Corona, CA
---------------
65 110 Coupe

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Re: Questions for the A/C Crowd
Posted by: Wagon Master ()
Date: February 04, 2018 12:51PM

Educate me. How does the condenser location determine the dryer location?

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Re: Questions for the A/C Crowd
Posted by: Dan ()
Date: February 04, 2018 01:04PM

I think that the reason the 66-69 dryers are in the trunk is related to the requirement that you route the filler tubes thru the taillight hole when charging the system. Set up this way you would be unable to look at the sight glass if it was in the engine compartment. Remember with the stock 66-69 setup the compressor will not run anyway with the deck lid open. This isn't an issue with the 65 and prior condenser, so the dryer is in the engine compartment. Hope this helps.

Dan
Chandler, AZ
1966 Corsa Turbo Convertible
[corvaircenter.com]



Edited 1 time(s). Last edit at 02/04/2018 01:06PM by Dan.

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