More efficient ac pump?

volaredon

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I have a fresh /6 on a stand....slightly built up, ready to go into my d150. At the same time I want to add AC to the truck which originally a non AC truck.
I have all the stuff for the dash from a parted truck that was factory AC. I have new lines for under the hood on ebay watch right now for my year of truck with the/6. I also have the lines from the parted truck, which had a 318. . I was thinking about cutting the crimps off and having new hoses put on the original fittings and re crimped if that would be possible, instead.

My question is, is there a compressor that will bolt in place of e original c-171 style, that draws less HP and still does a good job of cooling down the cab? If I'm looking at the possibility of having lines made anyway, it wouldn't be a huge deal to have them made to accommodate whatever compressor I might run. Just thinking out loud at the moment, I'm a ways out from worrying about ac at this point. Mainly body work and paint. I plan to have the cab repainted and to have the dash and HVAC parts pulled out while being repainted.
 

leechris81

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I have a fresh /6 on a stand....slightly built up, ready to go into my d150. At the same time I want to add AC to the truck which originally a non AC truck.
I have all the stuff for the dash from a parted truck that was factory AC. I have new lines for under the hood on ebay watch right now for my year of truck with the/6. I also have the lines from the parted truck, which had a 318. . I was thinking about cutting the crimps off and having new hoses put on the original fittings and re crimped if that would be possible, instead.

My question is, is there a compressor that will bolt in place of e original c-171 style, that draws less HP and still does a good job of cooling down the cab? If I'm looking at the possibility of having lines made anyway, it wouldn't be a huge deal to have them made to accommodate whatever compressor I might run. Just thinking out loud at the moment, I'm a ways out from worrying about ac at this point. Mainly body work and paint. I plan to have the cab repainted and to have the dash and HVAC parts pulled out while being repainted.
I actually just traded out my original compressor on my ‘73 Swinger and put the C171 in its place. It has been incredible. I can run under 210 engine temp at 90 mph with a 106 heat index and have to turn the a/c down because it gets unbearably cold in the car. I’m very pleased with the upgrade. I never could get my original RV2 to keep up and cool the way I wanted to.
 

MoparLeo

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Really any modern compressor is more efficient than the ancient Twin cylinder compressor. Sanden 's are the most used and have the biggest selection of mounting brackets available.
 

MoparLeo

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Really any modern compressor is more efficient than the ancient Twin cylinder compressor. Sanden 's are the most used and have the biggest selection of mounting brackets available.
 

lemondana

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The 78-79 Volare and Aspen with the Slant 6 were the first Mopar's to use the Sanden 508 compressor. It has a nice bracket setup if you can find the whole thing. It does use a 1 belt clutch though, so you need to find a setup complete with pulleys. PM me for more info.
 

volaredon

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What's the difference between the C171 and the Sanden? HP draw-wise.
This is an 80s truck which would have had a C171 to begin with "if it had come from the factory with air" which it didnt.
I have no problem with the RV2 on my old Fury. but because of the size and clumbsiness, I wasn't wanting to go there on this truck.
I did look on "Classic Air" (or was it "Vintage air"?) and they say that they have AC compressors that only use 5-6hp instead of 15-20. I'm not sure what model compressor they would supply/ or if it might work with factory AC hoses, or evaporator, or condenser.
from what I see, what they offer is to retrofit what they have in place of an RV2.
 

lemondana

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The C171 and the Sanden 508 are very similar, same size, just the mounting ears and line setups are different.
 

volaredon

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So one doesn't take more/less HP to run than the other? If that's the case I guess I'll find me a C171 so I can use stock type factory replacement hoses...
 

BillGrissom

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I haven't seen inside a C171, but perhaps you can find a youtube of a rebuild and compare to Sanden innards. My guess is that it has the same many double-acting pistons with swash plate, so should be as efficient. The only reason to switch to a Sanden might be for future availability or to have different ports. There is a long thread w/ many photos on AC compressor options for a slant-six. If you do go Sanden, the SD7 is newer and more common than the SD508 and has more pistons (smoother).
 
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