 Smog Pulley as an A/C pulley ? |
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| Literati914 |
 Jul 18 2025, 01:11 PM
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#1
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Advanced Member  Group: Members Posts: 2,025 Joined: 16-November 06 From: Dallas, TX Member No.: 7,222 Region Association: Southwest Region  |
Any reason that a smog pulley off the fan hub of a late 914 wouldn't work as the pulley to power a modern A/C compressor?
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| brant |
Jul 18 2025, 01:18 PM
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#2
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914 Wizard Group: Members Posts: 12,016 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains 
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its rubber mounted... many of them are failing now with age.
I'm not sure if the rubber and leverage of the extension would handle a heavy load.. assuming the A/C system would take more HP and more load than the small smog pump does on a stock system. |
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| burton73 |
Jul 18 2025, 03:42 PM
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#3
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Senior member, and old dude Group: Members Posts: 3,858 Joined: 2-January 07 From: Los Angeles Member No.: 7,414 Region Association: Southern California
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QUOTE(brant @ Jul 18 2025, 12:18 PM)  its rubber mounted... many of them are failing now with age. I'm not sure if the rubber and leverage of the extension would handle a heavy load.. assuming the A/C system would take more HP and more load than the small smog pump does on a stock system. Classic Auto Air has a 912E kit. Note the pieces that they use to fit the pully to the front of the fan. No sacrificial rubber piece. A smart guy could have these pieces fabricated and make something work. Best Bob b  |
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| 914Sixer |
Jul 18 2025, 04:37 PM
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#4
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914 Guru Group: Members Posts: 9,198 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region
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Yes BUT most of the rubber hubs are trash. Have to make sure you have a good one.
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| burton73 |
Jul 18 2025, 09:35 PM
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#5
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Senior member, and old dude Group: Members Posts: 3,858 Joined: 2-January 07 From: Los Angeles Member No.: 7,414 Region Association: Southern California
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QUOTE(914Sixer @ Jul 18 2025, 03:37 PM) Yes BUT most of the rubber hubs are trash. Have to make sure you have a good one. @914Sixer Yeah the factory parts are all wasted to speak of, but these parts are just metal, there is no sacrificial rubber on it. Just have to worry about what would happen if you're compressor froze Best Bob B  |
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| Literati914 |
Jul 18 2025, 09:47 PM
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#6
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Advanced Member Group: Members Posts: 2,025 Joined: 16-November 06 From: Dallas, TX Member No.: 7,222 Region Association: Southwest Region |
QUOTE(914Sixer @ Jul 18 2025, 05:37 PM) Yes BUT most of the rubber hubs are trash. Have to make sure you have a good one. I've never seen a smog pulley in person - So is there a bearing where the "arms" converge (that the shaft runs through)? If so, can that bearing be changed out for renewal? Regarding the worn out rubber piece.. seems like it would be a simple thing to have one machined out of steel/aluminum(?) - think that would work for using it as a compressor pulley? |
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| Literati914 |
Jul 18 2025, 09:50 PM
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#7
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Advanced Member Group: Members Posts: 2,025 Joined: 16-November 06 From: Dallas, TX Member No.: 7,222 Region Association: Southwest Region |
QUOTE(brant @ Jul 18 2025, 02:18 PM) .. assuming the A/C system would take more HP and more load than the small smog pump does on a stock system. I hadn't considered the diameter of the smog pulley vs an A/C pulley, that I need to look into. |
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