Just thinking and wondering? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Andy4639 · 05-03-2012, 11:26 PM

OK a little back ground.
My truck has a aftermarket compressor and condensor for 134-RA. I have a 20" electric fan out of the junk yard wired to the AC switch ran through a relay. I also have a manual water valve in the heater line to stop all hot water flow to inside the cab during the summer. I blocked off the cowl vent Under the passenger side and left the passenger side vent inside the cab open when running the AC. It's a manual operated one I never installed the vacume one. This keeps the air inside the truck colder and recirculates it.
I put a shot of this in the truck the other night.

Here is the outside temp. per the truck outside temp probe.

Here is the inside temp 41 degree's sitting still in the garage.
Sorry the flash wipped out the scale. It's sitting on 41.
I have owned this truck since 1986 and it has never been this cold since I installed the AC a few years after buying the truck. Before this last mod I had to keep the fan speed on high are I would start sweating.

Now when I drive it it drops to about 38 -36. This is all on med fan setting and I have been turning it off before I reach work which is a 15 mile ride in the afternoon.
Just wondering what everyone elses does on hot days.
I really enjoy driving it to work.

**70cst** · 05-03-2012, 11:37 PM

41 should keep you from sweating ...

davepl · 05-03-2012, 11:53 PM

That's cool... no pun. I think the drop is normally only 25 degrees or so. Is there some magic ingredient in this product or is was it just a side-effect of bringing up a low system?

Andy4639 · 05-04-2012, 12:02 AM

Well I used this same product a few weeks pryer to my truck in my sons S-10. He swore it was colder than normal. I put a whole can in his though because it was low.
I went to check mine and it was on the low side of the blue mark on the scale which was OK but me being me I added maybe a 1/2 can. The level has always been good as the scale said maybe it just needed that little extra I don't know.

**yote1234** · 06-24-2014, 06:24 PM

I understand this is an old thread but hopefully you will reply. just wondering why you would open the passenger vent and not keep it closed?
just wondering. dave

unless its used for a return! ??

**leddzepp** · 06-24-2014, 07:45 PM

That is the recirculating door, you want it open with the AC on or the volume of air coming out your vents will be very low.

**yote1234** · 06-24-2014, 07:50 PM

Quote:

Originally Posted by leddzepp

That is the recirculating door, you want it open with the AC on or the volume of air coming out your vents will be very low.

yea! dumb me! it makes sense. thx for reply. dave

Andy4639 · 06-24-2014, 08:39 PM

The passenger side vent being open is to recirculate the cold air like in late model cars. The outside cowl vent is sealed off so that the fan pulls the air inside the cab back through the evaporator and keeps from pulling in hot air from out side. This keeps the cab nice and cool.

05-03-2012, 11:26 PM	#1
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,936	Just thinking and wondering? OK a little back ground. My truck has a aftermarket compressor and condensor for 134-RA. I have a 20" electric fan out of the junk yard wired to the AC switch ran through a relay. I also have a manual water valve in the heater line to stop all hot water flow to inside the cab during the summer. I blocked off the cowl vent Under the passenger side and left the passenger side vent inside the cab open when running the AC. It's a manual operated one I never installed the vacume one. This keeps the air inside the truck colder and recirculates it. I put a shot of this in the truck the other night. Here is the outside temp. per the truck outside temp probe. Here is the inside temp 41 degree's sitting still in the garage. Sorry the flash wipped out the scale. It's sitting on 41. I have owned this truck since 1986 and it has never been this cold since I installed the AC a few years after buying the truck. Before this last mod I had to keep the fan speed on high are I would start sweating. Now when I drive it it drops to about 38 -36. This is all on med fan setting and I have been turning it off before I reach work which is a 15 mile ride in the afternoon. Just wondering what everyone elses does on hot days. I really enjoy driving it to work. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

05-03-2012, 11:37 PM	#2
70cst Senior Member Join Date: Feb 2001 Location: New Madison, Ohio Posts: 21,365	Re: Just thinking and wondering? 41 should keep you from sweating ... __________________ A husband can be right...or...A husband can be happy. 67-72 Chevy and GMC Trucks...The Classic Truck for the Classic Folk. 1970 CST Two tone green, 402BB, 400 Automatic, Tach, Buckets, AC, AM-FM, Tilt, GM CB, GM 8 Tract, LWB, etc JOHN 17:3...The better side of "LIFE" Remember: Everyday is a good day...Some are just gooder!

05-03-2012, 11:53 PM	#3
davepl Registered User Join Date: Aug 2006 Location: Redmond, WA Posts: 6,332	Re: Just thinking and wondering? That's cool... no pun. I think the drop is normally only 25 degrees or so. Is there some magic ingredient in this product or is was it just a side-effect of bringing up a low system? __________________ 1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible

05-04-2012, 12:02 AM	#4
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,936	Re: Just thinking and wondering? Well I used this same product a few weeks pryer to my truck in my sons S-10. He swore it was colder than normal. I put a whole can in his though because it was low. I went to check mine and it was on the low side of the blue mark on the scale which was OK but me being me I added maybe a 1/2 can. The level has always been good as the scale said maybe it just needed that little extra I don't know. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

06-24-2014, 06:24 PM	#5
yote1234 Senior Member Join Date: Feb 2003 Location: Gold Canyon Arizona Posts: 4,320	Re: Just thinking and wondering? I understand this is an old thread but hopefully you will reply. just wondering why you would open the passenger vent and not keep it closed? just wondering. dave unless its used for a return! ?? __________________ 1971 K5 CST Blazer 1965 Chevelle Malibu 283 (sadly sold) 1968 Camaro 327 1968 Honda mini-trail z50a #377 1966 uh 1-D Huey Last edited by yote1234; 06-24-2014 at 06:28 PM. Reason: ad

06-24-2014, 07:45 PM	#6
leddzepp Moderator Join Date: May 2007 Location: Southern Cal Posts: 19,995	Re: Just thinking and wondering? That is the recirculating door, you want it open with the AC on or the volume of air coming out your vents will be very low. __________________ 1972 C/10 Cheyenne Super SWB. Restored, loaded, slammed. 1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck. RIP ElJay RIP 67ChevyRedneck RIP Grumpy Old Man

06-24-2014, 08:39 PM	#8
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,936	Re: Just thinking and wondering? The passenger side vent being open is to recirculate the cold air like in late model cars. The outside cowl vent is sealed off so that the fan pulls the air inside the cab back through the evaporator and keeps from pulling in hot air from out side. This keeps the cab nice and cool. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.



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