LS1 Compressor
#1
LS1 Compressor
I'm installing a used a/c compressor that came with my engine pullout. The engine came from a car low miles and still had all the lines attached. It even leaked a little more freon after I removed the manifold and lines from the compressor. I'm on the fence about changing the compressor oil. I will be replacing the lines, drier, etc. but the condenser and evaporator are original and were functioning before the swap. I'll clean both of those as well...
Any advice on what to do with the compressor? Just run it? Add oil or change the oil?
Any advice on what to do with the compressor? Just run it? Add oil or change the oil?
#2
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Re: LS1 Compressor
I'd recommend changing it. Not least because, you don't know how much is in it. Drain & refill with the right amount.
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Re: LS1 Compressor
Agreed. If the system has been exposed to air it will absorb moisture. It's a very simple process and PAG oil can be purchased at any parts store and or amazon. Measure what you pour out, and pour the same amount of new back in.
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Re: LS1 Compressor
IIRC that is a V7 compressor. You will likely have to change the control valve to get the evaporator cooling correctly. V7 in a retrofit application, I typically get the 2nd lowest pressure valve if it is not already installed.
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#5
Re: LS1 Compressor
Thanks for the input...
Bill
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Re: LS1 Compressor
Admittedly, I'm not an a/c expert. When you say control valve, are you talking about the high side pressure switch? If so, I had planned to use the 4th gen switch. Is that the switch or are you talking about something like the cycle switch or something different altogether?
Thanks for the input...
Bill
Thanks for the input...
Bill
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badtenant (05-09-2024)
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#8
Re: LS1 Compressor
I'm seeing some of eBay...This one is $1000
https://www.ebay.com/itm/182037784299
What color? Purple?
https://www.ebay.com/itm/182037784299
What color? Purple?
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Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
Re: LS1 Compressor
I'm seeing some of eBay...This one is $1000
https://www.ebay.com/itm/182037784299
What color? Purple?
https://www.ebay.com/itm/182037784299
What color? Purple?
I just looked, Camaro is speced for a 41 psi valve, it would probably be fine as is with minimal cooling loss compared to the 40 psi valve I used. 1 psi changes the boiling point about 1°F, not a huge change.
Last edited by Fast355; 05-10-2024 at 02:05 AM.
#10
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Re: LS1 Compressor
I should also say when I said retrofit earlier on that style compressor, it was actually a V5 on an earlier GM and a R12 to R134a retrofit but the V7 is the same in that regard. The V5 and V7 are nearly identical, the V7 just has 2 more pistons and more displacement allowing it to move more refrigerant. Thus higher BTU capacity. The V7 and even V5 for that matter are overlooked and very underated units. An old GM A6 was always noted for being a monster in terms of BTU capacity. The A6 could move 42,000 BTU. The V7s 14 kw capacity is 47,770 BTU. At full stroke the V7 can certainly eat some power though, at 4,000 rpm that 9 kw power consumption is over 12 hp. At that RPM with a single evaporator system, the V7 will be running at a much lower stroke than full capacity though. The beauty of the V7 is it has displacement on demand and at idle and lower rpm the compressor can move enough refrigerant to keep the ac blowing practically as cold as moving down the road, provided your condenser has adequate airflow across it to keep the pressures down.
Last edited by Fast355; 05-10-2024 at 02:19 AM.
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