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Re: A Few Corvair Air Conditioning Details with Pics
Posted by: 66vairman ()
Date: June 22, 2021 07:10PM

azdave Wrote:
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> Here's the blower resistor info I have collected.
>
> In my findings, you can quickly identify an A/C car resistor pack due to the black fiberglass backer board which can easily be seen just by looking into the trunk. The non-A/C cars used a dense paperboard backing that is light brown. I assume fiberglass was used on the A/C cars due to the extra heat produced when you ran the fan on low. The resistance coils are not the same diameter or resistance value when I measure them. I used a Fluke bench VOM and subtracted the test lead resistance so the values shown in the photos are as accurate as I could manage. See pics.
>
> Non-AC resistor pack = P/N INDAK 3866429
>
> A/C resistor pack = P/N INDAK 3866430

Dave - I also used a basic DMM and in spite of zeroing the leads the accuracy is not up to test standards. Also the resistor wire has to be crimped in the terminals (THEY DO GET HOT) and corrosion does add resistance.

That said your numbers are close to mine as follows:
3866429 (not A/C) 1.5 ohm and 2.6 ohm
3866430 (A/C) 0.7 ohm and 1.8 ohm.

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Re: A Few Corvair Air Conditioning Details with Pics
Posted by: azdave ()
Date: June 22, 2021 07:20PM

Wagon Master Wrote:
-------------------------------------------------------
> Wouldn't the lower ohm rating on the A/C resistor generate less heat spinning the blower motors faster? Debunking the fiberglass theory?

Now that I think about it further, wouldn't that only be true if the heater and A/C blowers were identical? Where are our EE's at?



66vairman Wrote:
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> Dave - I also used a basic DMM and in spite of zeroing the leads the accuracy is not up to test standards.

I agree. Reading low resistance values it not easy to get accurate. I was just showing that relative differences exist between the two parts.

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



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Re: A Few Corvair Air Conditioning Details with Pics
Posted by: 66vairman ()
Date: June 22, 2021 07:26PM

flat_six Wrote:
-------------------------------------------------------
> Just wanted to note that one can add a relay to the high speed fan circuit to save the fan switch from handling full current. The 1965 system had that. A schematic is in the 1965 shop manual. This can facilitate the VDO or other high volume motors without risking the precious switch.
>
> I made my own from relays purchased from Radio Shack.
>
> I also put a relay around the thermostat switch that is on the side of the evaporator. Those have points that can erode as the system cycles on and off. As designed, that switch handles the full current to the compressor clutch coil.

Flatsix - You are probably aware, but the 65 A/C schematic is INCORRECT, the manual was written before the design was revised to ELIMINATE the relay. Hard to say why as a relay on HI speed is a good idea. Refer to the 66 shop manual to troubleshoot the 65 A/C wiring and switches.

I use the ubiquitous Bosch five terminal relays. Easy to order as they were used in many vehicles and can handle up to 30 Amps (although some specs. say 40 Amps).

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Re: A Few Corvair Air Conditioning Details with Pics
Posted by: 66vairman ()
Date: June 22, 2021 10:48PM

azdave Wrote:
-------------------------------------------------------
> Wagon Master Wrote:
> -------------------------------------------------------
> > Wouldn't the lower ohm rating on the A/C resistor generate less heat spinning the blower motors faster? Debunking the fiberglass theory?
>
> Now that I think about it further, wouldn't that only be true if the heater and A/C blowers were identical? Where are our EE's at?
>

And you have hit on the issue. The PM134 specs (that I've found) do NOT LIST motor amperage. Also the switch routes power through a series of two resistors or one depending on switch setting. So it's not as simple as just looking at the resistor values. Heat at each resistor is calculate by total amperage through the resistor. One day after I work down my "to do" list I'll insert a 0.1 ohm series resistor with the PM 134 fan motor and see what the voltage drop is to calculate amperage and wattage. Suffice it to say it works and since I use relays the switch isn't being stressed.

Note - most of the switch issued I've found are due to oxidation of the contacts and dried out lubrication leading to poor contact and HEAT. Clean them up and lubricate them and they will perform well.

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Re: A Few Corvair Air Conditioning Details with Pics
Posted by: Phil Dally ()
Date: June 23, 2021 05:28AM

When I had my two Fore & Aft switches refurbished both fans in Gem seemed to blow harder.

I assume that refurbishing created less resistance (allowing full 12 volts) through the switch.

Quote
66vairman
Note - most of the switch issued I've found are due to oxidation of the contacts and dried out lubrication leading to poor contact and HEAT. Clean them up and lubricate them and they will perform well.

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Re: A Few Corvair Air Conditioning Details with Pics
Posted by: Phil Dally ()
Date: June 28, 2021 06:02AM

So far we have not talked about throttle solenoids.

Just got this one from a member here...thanks Jeff.

Couple of my Vairfest highlights were conversations.

With Duane Wentland and Tim Shortle about what really.

Is and is not factory stock about our Corvair air conditioning.

We walked between the factory examples there and I learned a lot.

Including Gem's solenoid wire has been repaired...nicely I must say.

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Re: A Few Corvair Air Conditioning Details with Pics
Posted by: Phil Dally ()
Date: June 28, 2021 06:22PM

Found on Corvair trader.

Can the wire be replaced?


[www.facebook.com]

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Re: A Few Corvair Air Conditioning Details with Pics
Posted by: Wagon Master ()
Date: June 28, 2021 06:42PM

When you install electric auxiliary fans on your 66-67 condenser, do you still have to charge sthe system through the reverse light with the deck lid closed?

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Re: A Few Corvair Air Conditioning Details with Pics
Posted by: joelsplace ()
Date: June 28, 2021 06:48PM

No

Joel
Northlake, TX
5 Ultravans, 119 Corvairs and counting...

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Re: A Few Corvair Air Conditioning Details with Pics
Posted by: azdave ()
Date: June 28, 2021 07:23PM

Phil Dally Wrote:
-------------------------------------------------------
> Found on Corvair trader.
>
> Can the wire be replaced?



That is CC member Eric Starkey. He is asking $85 plus shipping for a unit that will be hard to fix and not show any evidence afterwards. I offered him $60 and then $65 but he has not replied to my last offer. Maybe I offended him. He sold one recently that had the wire still attached for $100 but someone got to it before me.

I have not posted details about them because I have next to nothing to show. I know there are the early versions that mounted on the right and were electric/vacuum operated and then at least two pure electric versions of the later style that mount on the left.

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



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Re: A Few Corvair Air Conditioning Details with Pics
Posted by: Timothy Shortle ()
Date: June 30, 2021 03:01PM

The 66 version just mounted on the top of the top shroud left side. The 67 version was the same but also had a leg that mounted vertically. I suggest putting something on the undersize of the top shroud to (hopefully) prevent tearing the shroud.

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Re: A Few Corvair Air Conditioning Details with Pics
Posted by: 67 airvair ()
Date: July 01, 2021 08:18AM

The '66 version also uses (and needs) 3 screws, whereas the '67 uses but two per leg (total of four.)

-Mark

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Re: A Few Corvair Air Conditioning Details with Pics
Posted by: corvairgreg ()
Date: July 01, 2021 02:08PM

There was also an all electric service replacement for the earlier vacuum/electric solenoids. I have one on my 64.

Greg

Greg Hanlin
Dayton OH

1964 Monza Convertible
1965 Corsa Convertible
1966 Corsa Convertible
1963 Greenbrier

Dayton Corvair Club
CORSA

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Re: A Few Corvair Air Conditioning Details with Pics
Posted by: 68MCS68 ()
Date: July 06, 2021 11:55AM

Typically car A/C systems have a drain, does the Corvair system have one? I've looked at our evaporator and don't see one.

Si

Simon in Beaverton Oregon
1965 Monza 110 Coupe with 140 heads and A/C

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Re: A Few Corvair Air Conditioning Details with Pics
Posted by: Timothy Shortle ()
Date: July 06, 2021 12:08PM

Yes. There is definitely an evaporator drain hose to remove the condensation.

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Re: A Few Corvair Air Conditioning Details with Pics
Posted by: jbyenko77 ()
Date: July 06, 2021 12:30PM

Hi,

going through my AC stuff and found ( I think) all AC solenoids .

So here they are in one picture, early vacuum/electric, 1965? , then 1966 and 1967

I will be bringing AC parts for sale to Fan Belt Toss



jeff ballard
Camarillo, Ca

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Re: A Few Corvair Air Conditioning Details with Pics
Posted by: 68MCS68 ()
Date: July 06, 2021 03:03PM

Thank you Timothy, could you tell me where to look to see if the drain is present on our car and where it exits?

Si

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Re: A Few Corvair Air Conditioning Details with Pics
Posted by: azdave ()
Date: July 06, 2021 05:27PM

68MCS68 Wrote:
-------------------------------------------------------
> Typically car A/C systems have a drain, does the Corvair system have one? I've looked at our evaporator and don't see one.


Center, bottom of evaporator case below the glove box. Drain goes forward through a grommeted, drilled hole into the area where the fuel tank is at.

66 assembly manual ID's the hose as #16 and the grommet as #15.

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



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Re: A Few Corvair Air Conditioning Details with Pics
Posted by: 68MCS68 ()
Date: July 07, 2021 10:11AM

Thank you Dave, I made a slot for that when putting in the carpet recently - thought it was one of the pressure lines.

Si

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Re: A Few Corvair Air Conditioning Details with Pics
Posted by: MikeVair ()
Date: July 12, 2021 12:18PM

jbyenko77 Wrote:
-------------------------------------------------------
> Hi,
>
> going through my AC stuff and found ( I think) all AC solenoids .
>
> So here they are in one picture, early vacuum/electric, 1965? , then 1966 and 1967
>
> I will be bringing AC parts for sale to Fan Belt Toss
>
>
>
> jeff ballard
> Camarillo, Ca


Do you have a picture of the top left idle solenoid attached to the bracket?

1965 Corsa Convertible
1963 Convertible
1964 Monza Coupe
NTCA

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