LS factory compressor? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

J48chevy · 10-20-2015, 05:48 PM

Installing an LS and was wondering if anyone is using the stock LS compressor with the vintage air set up? Can you use this to save on cost of the full air condition kit? Just wondering. The LS I have has all the components on it so I figured why not use this too.
Thanks

dsraven · 10-20-2015, 06:09 PM

not sure because the ls compressor is cycled by the ls computer. need an ac guy to answer that one. it would be good to know since I will be in the same quandary with my build one day.

dwcsr · 10-20-2015, 07:06 PM

I was told by Vintage that the LS compressor is a variable compressor and would not work with the VA kit. I have also heard on here that others have used it so I would call them to make sure.

1project2many · 10-20-2015, 07:07 PM

The stock compressor should be able to handle the job. We use them on larger bus systems. But there may be a difference between the type of connection on the OE compressor and the VA unit. If you know someone who makes A/C hoses then you're all set.

1project2many · 10-20-2015, 08:42 PM

Sorry... didn't get back in time to edit the previous post.

The LS Compressor is a variable displacement compressor. It is typically used with a fixed orifice tube like those found in many GM vehicles from the late '70s up. The VA system uses a fixed displacement compressor and a thermal expansion valve to control flow through the evaporator based on load. Sometimes a hybrid system will hunt, with both the compressor and the expansion valve to control evap temp but actually causing temperature variations.

There are vehicles using a vairable displacement compressor and a thermal expansion valve. Some of our buses have a hybrid system with a fixed orifice on the front evaporator and an expansion valve on the rear evap. They work well.

You could look for a Sanyo clone compressor to try and save $$ if you don't want to mess with the OE compressor.

10-20-2015, 05:48 PM	#1
J48chevy Registered User Join Date: Jun 2013 Location: Michigan Posts: 304	LS factory compressor? Installing an LS and was wondering if anyone is using the stock LS compressor with the vintage air set up? Can you use this to save on cost of the full air condition kit? Just wondering. The LS I have has all the components on it so I figured why not use this too. Thanks __________________ My Build: 1948 Chevy Thriftmaster. Mustang 2 front end, LS1, 700R trans, Explorer Rear end. http://http://67-72chevytrucks.com/vboard/showthread.php?t=606670

10-20-2015, 06:09 PM	#2
dsraven Registered User Join Date: Nov 2010 Location: calgary alberta Posts: 8,334	Re: LS factory compressor? not sure because the ls compressor is cycled by the ls computer. need an ac guy to answer that one. it would be good to know since I will be in the same quandary with my build one day.

10-20-2015, 07:06 PM	#3
dwcsr Hollister Road Co. Join Date: Apr 2005 Location: Houston Posts: 6,131	Re: LS factory compressor? I was told by Vintage that the LS compressor is a variable compressor and would not work with the VA kit. I have also heard on here that others have used it so I would call them to make sure.

10-20-2015, 07:07 PM	#4
1project2many Registered User Join Date: Mar 2012 Location: Lakes Region NH Posts: 3,200	Re: LS factory compressor? The stock compressor should be able to handle the job. We use them on larger bus systems. But there may be a difference between the type of connection on the OE compressor and the VA unit. If you know someone who makes A/C hoses then you're all set.

10-20-2015, 08:42 PM	#5
1project2many Registered User Join Date: Mar 2012 Location: Lakes Region NH Posts: 3,200	Re: LS factory compressor? Sorry... didn't get back in time to edit the previous post. The LS Compressor is a variable displacement compressor. It is typically used with a fixed orifice tube like those found in many GM vehicles from the late '70s up. The VA system uses a fixed displacement compressor and a thermal expansion valve to control flow through the evaporator based on load. Sometimes a hybrid system will hunt, with both the compressor and the expansion valve to control evap temp but actually causing temperature variations. There are vehicles using a vairable displacement compressor and a thermal expansion valve. Some of our buses have a hybrid system with a fixed orifice on the front evaporator and an expansion valve on the rear evap. They work well. You could look for a Sanyo clone compressor to try and save $$ if you don't want to mess with the OE compressor.



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