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GM R4 compressor conversion?

 
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MacDaddy
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Joined: 19 Aug 2003
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Location: Los Angeles, Ca
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PostPosted: Sun Sep 28, 2003 10:08 pm    Post subject: GM R4 compressor conversion? Reply with quote

Wondering what converting to the latemodel GM R4 AC compressor would require. I'm looking to get some weight off the frontend and free up some engine compartment space. I like how the latemodel compressor is nice and compact. Besides new brackets and some hoses, what would this conversion require in my 1979 Camaro?
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-Gordon

1979 Camaro Berlinetta
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1979 Chevrolet Camaro

PostPosted: Sun Sep 28, 2003 10:59 pm    Post subject: Reply with quote

If your looking to make the change I'd recommend ditch the V-belts all together. Get a serpentine drive off of a late 80's F-body is what I did. NOTE: I don't have my A/C connected, but the compressor is still there. I need lines to be made to make it functional. IMO it was worth the swap.
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MacDaddy
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PostPosted: Mon Sep 29, 2003 10:43 pm    Post subject: Reply with quote

Thanks for the reply and advice.

The reason why I ask is because I am planning to put headers on my car, and I don't know if the rear AC pivot bracket will clear the headers. I don't think it will. Maybe with a bunch of machining it will, but I doubt it.

I am planning to put Doug Throley 375-Y Tri-y headers on, or Hedman full length headers with A.I.R. injection tubes. Does anybody have any experience with these headers? Is it possible to make the rear AC bracket fit when using them on second generation Camaros?

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PostPosted: Tue Sep 30, 2003 12:09 am    Post subject: Reply with quote

Are you talking about the bottom bolt where the compressor bolts to a header bolt?
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MacDaddy
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PostPosted: Tue Sep 30, 2003 12:34 am    Post subject: Reply with quote

Nope. I'm taking about the rear bracket that straddles the bolts for exhaust ports 1 and 3.

I am talking about the stock compressor now. The big fat long one.

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1979 Camaro Berlinetta
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PostPosted: Tue Sep 30, 2003 12:39 am    Post subject: Reply with quote

I know which one you're talking about. They make a bracket for it. I have one that I'm not using (and will never use again!). If I can find it you can have it.
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MacDaddy
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PostPosted: Tue Sep 30, 2003 3:31 am    Post subject: Reply with quote

Oh sweet! Is this for the Hedman headers?
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clay
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1972 Chevrolet Nova

PostPosted: Wed Oct 01, 2003 9:28 pm    Post subject: Reply with quote

I just finished getting the air working on my 72 Nova about 4 months ago. My advice about the R4 compressor is run away. I looked around several websites and talked to several poeple and nobody likes the R4 for a conversion. Go to ackits.com and read their message board. Every question you have will probably be answered there somewhere. Very good site. I converted to R134 also and it cools pretty good. Ackits sells a small compressor that will be light and tough. The R6 you have is one of the toughest compressors around from what I could tell and has a max rpm limit of about 10,000 rpm. It does have two downfalls, it's extremely heavy as you know and it eats horsepower. I know what you are talking about with the rear mount and the headers, I had to make one. If you have any other questions, let me know. Clay
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