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Installing CR alternator and electrocooler AC - replace A/C crankshaft pulley?
Hi all,
My COVID/winter project is sitting in my garage waiting for me to get started - the Classic Retrofit upgraded alternator and the electrocooler A/C. My car had factory A/C that didn't work when I bought the car and the compressor, condensers, and all the hoses have been removed. The dual belt crankshaft pulley is obviously still there. I don't like to replace things that don't need replacing, so I'm wondering if there are compelling reasons to replace the crankshaft pulley with the non-A/C version. I know one advantage is weight - if I am reading correctly the A/C dual belt pulley weighs 4 pounds vs. the non-A/C pulley which weighs 3 pounds. Is the amount of work worth 1 pound? Are there are other reasons to replace it - I don't know, like the way it balances or something when only using one belt? Of course, you can go further on the weight-saving side with the Rothsport aluminum pulley. Anyway, I'm just wondering if this is something that I really should do or if I should leave well enough alone and use the existing pulley. Thanks! Todd |
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I've got the double pulley on my 2.7 (AC long gone); I wish it had just the single pulley so that I could get a wrench on the bolt to turn the crank...
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Not worth the 'weight' savings or un-measurable fuel savings or hp gain.
Unless you are racing toe to toe the leader of the pack.
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Kuehl 1987 911 cab, modified https://griffiths.com/ |
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Join Date: May 2004
Location: Boulder, Colorado
Posts: 7,275
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What Fan mentioned is a worthwhile improvement if you are a DIY guy.
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Join Date: May 2013
Posts: 883
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You might find someone who wants to swap - anyone fitting a compressor to a non AC car will be looking for that pulley.
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ROW '78 911 Targa
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Throwing on a new crank pulley with a 36-1 toothed wheel attached for possible future ignition control would be worthwhile.
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Dennis Euro 1978 SC Targa, SSI's, Dansk 2/1, PMO ITBs, Electric A/C Need a New Wiring Harness? PM or e-mail me. Search for "harnesses" in the classifieds. |
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