age old problem with AC

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Aug 3, 2014 | 12:49 PM

quiksilver50

Thread Starter

Heel & Toe

Joined: May 2014

Posts: 24

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From: Oklahoma City

age old problem with AC

I have a very common problem while running the AC, it REALLY puts a drag on the engine when the compressor is running. I know this is common for the older cars, but if there is a way to improve this, I would like to do it. Any body ever been able to ease the drag on the motor ?

Aug 3, 2014 | 03:08 PM

MrJlr

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Joined: Feb 2006

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From: Chino CA

I went to a Sanden rotory compressor and now my engine barely even notices when it comes on

Aug 3, 2014 | 03:12 PM

mrvette

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Joined: Jul 1999

Posts: 65,492

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From: Orange Park Florida

Quote:

Originally Posted by MrJlr

I went to a Sanden rotory compressor and now my engine barely even notices when it comes on

THAT and running DPFI on it, lets the computer deal with it, there ARE idle control solenoids that block/nudge the idle up a tad on the sharks, to keep engine speed the same, activated by the compressor wire.....

Aug 3, 2014 | 03:16 PM

quiksilver50

Thread Starter

Heel & Toe

Joined: May 2014

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From: Oklahoma City

Thanks !!

Quote:

Originally Posted by MrJlr

I went to a Sanden rotory compressor and now my engine barely even notices when it comes on

THANK YOU !! Will try that !

Aug 3, 2014 | 03:16 PM

quiksilver50

Thread Starter

Heel & Toe

Joined: May 2014

Posts: 24

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From: Oklahoma City

Thank you !!

Aug 3, 2014 | 03:19 PM

MrJlr

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Joined: Feb 2006

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From: Chino CA

Quote:

Originally Posted by quiksilver50

THANK YOU !! Will try that !

Added benefit - you'll drop about 30lbs too

Aug 3, 2014 | 03:40 PM

jb78L-82

Le Mans Master

Joined: Oct 2007

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From: RI, Now Franklin/Nashville TN

Back in the late 70's/early 80's I used a vacuum switch that I believe was sold by JC Whitney on my A6 compressors that easily wired into the AC current side of the switch and you used a T connection into a carb vacuum line. As the engine accelerated and the vacuum dropped the ac current to the compressor was interrupted which disengaged the compressor operation under acceleration only-it was a simple ingenious solution that worked great. As soon as the engine went back to part or full vacuum the compressor engaged normally.

Found this on youtube with no specifics but obviously it still can be done:

Sounds like the Sanden compressor is the way to go when I get my AC going again.

Last edited by jb78L-82; Aug 3, 2014 at 03:48 PM.

Aug 3, 2014 | 09:45 PM

CaseyJones

Melting Slicks

Joined: Jul 2010

Posts: 2,503

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From: McGrady NC

St. Jude Donor '15-'16

Chevrolet used a similar setup on some of their lower horsepower engines in the 70's. My (then brand new) 73 Vega GT would do that. I really liked that car.