LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

A / C delete?

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Old 04-16-2012, 03:27 PM
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A / C delete?

Is there a shorter acc belt to bypass the A / C without needing a a/c replacing pulley.
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Old 04-16-2012, 03:42 PM
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Lt1 engine? No, get the pulley, use the same belt

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Old 04-16-2012, 03:57 PM
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Re: A / C delete?

Thank you for the quick response.
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Old 04-16-2012, 05:21 PM
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Re: A / C delete?

yep otherwise if you try and run a shorter belet without that pulley, some of your accesories will run the wrong direction.
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Old 04-16-2012, 08:05 PM
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Re: A / C delete?

Had never thought of that ,thanks!!!!!
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Old 04-17-2012, 02:10 AM
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Re: A / C delete?

I bought the A/C delete bracket w/pulley & I needed to but a shorter belt...
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Old 04-17-2012, 10:51 AM
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Originally Posted by rat's nest Z-28
I bought the A/C delete bracket w/pulley & I needed to but a shorter belt...
You buy the ac delco one?

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Old 04-17-2012, 11:11 AM
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Re: A / C delete?

You should not need a shorter belt. Hell I even had the cheap one off ebay and it used the stock belt.
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Old 04-17-2012, 08:52 PM
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Re: A / C delete?

I had to get a shorter belt for mine. The only gain is weight loss. Im putting my a/c back on its only restricting when its on.
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Old 04-19-2012, 10:09 PM
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Re: A / C delete?

I run the AC delete pulley and had to get a shorter belt.
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Old 09-09-2012, 08:37 PM
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Re: A / C delete?

It looks like I need a shorter belt for my delete pulley also. I have the GM pulley and the belt is so loose it doesnt even stay on. Any of you guys have a part number for the belt I need by any chance?
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Old 09-09-2012, 09:14 PM
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Re: A / C delete?

I believe there may have been two different A/C clutch pulley diameters used, and whether you need a new belt when you use the A/C delete pulley will depend on which diameter clutch pulley you had.
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Old 09-09-2012, 11:37 PM
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Re: A / C delete?

Originally Posted by Injuneer
I believe there may have been two different A/C clutch pulley diameters used, and whether you need a new belt when you use the A/C delete pulley will depend on which diameter clutch pulley you had.
Exactly. There were two different diameter a/c pulleys used. Use a 642 belt for the bigger pulley or a 637 [edit: should be 635] for the smaller one.

Last edited by shoebox; 09-11-2012 at 07:14 AM. Reason: change belt size
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Old 09-10-2012, 08:09 AM
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Re: A / C delete?

Thanks for the info. I definitely ended up with a smaller delete pulley than the size my compressor pulley was. Is 637 the ac delco part number?
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Old 09-11-2012, 05:12 AM
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Re: A / C delete?

The A/C delete pulley is a smaller diameter, but it's offset on the bracket to hold the belt length.
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