C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

AIR pump delete question

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Old Mar 12, 2009 | 11:26 AM
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Default AIR pump delete question

Hey guys, I want to start out by saying I did attempt to search but I think the search function is messed up. I have an 86 that I would like to delete the air pump from, the AC is already out and at one point I saw a thread that had a standardf rotation waterpump, no tensioner, no air pump and an adjustable threaded rod that went from the ALT to the manifold to tension the deal. Does anyone have a part number for that rod off hand? or a link to the thread or pics would be great too!

thanks
John
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Old Mar 12, 2009 | 11:32 AM
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I used the rod brace from the A/C, it was nearly a perfect fit. I had to slot the bolt hole just a little. Also I've ran it awhile with the reverse rotation pump turning normal rotation, with no over heating. I do have a normal rotation pump to install, mainly for fear of cavitation under my increased (6000 RPM) rev limit. You can use a threaded rod but it isn't needed.

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Old Mar 12, 2009 | 12:44 PM
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thats perfect! thanks so much. do you remember what size belt you used?
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Old Mar 12, 2009 | 12:58 PM
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When I measured it looked like a 53" to 56" would work. I went with a 55" from Summit for $15.

Part Number: GTR-4060550
Belt Style: Serpentine
Number of Belt Ribs: 6
Belt Length (in): 55.00 in.
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Old Mar 12, 2009 | 01:16 PM
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I'll have to go find my AC rod, I know 88 got a diffrent compressor, but hopefully the support rod is the same. thanks again!

John
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Old Mar 12, 2009 | 04:31 PM
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one more question, my ac bracket is definately diffrent, so I guess Im back to the threaded rod. could you tell me the length of that rod brace?

Thanks again
John
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Old Mar 12, 2009 | 05:49 PM
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kinda a dumb question. what happens when you run a pump in reverse of what it should be doing. i want to remove my air pump but i don't want to mess up the engine.
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Old Mar 12, 2009 | 06:05 PM
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Default Air pump delete

Why don't you use an air pump delete bracket. That way you can even use the factory belt. Just an idea.


rk
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Old Mar 12, 2009 | 07:49 PM
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Those air delete pulleys are expensive. This just costs $15 in a new belt, you'll make money selling the old parts.

My bracket is roughly 10.5" bolt center to bolt center. Probably 11.25" in total length. You can place the alternator across a large arc there.
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Old Mar 13, 2009 | 01:14 AM
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Aardwolf, how do you set belt tension?
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Old Mar 13, 2009 | 07:02 AM
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thats what i needed, going to order an adjustable rod and the belt today. thanks again!
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Old Mar 13, 2009 | 09:46 AM
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I set the belt tension by placing a bar between the alternator and brace then pulling. Just like the old days! I squeeze the belt and see that it compresses about a quarter inch each side.
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Old Mar 13, 2009 | 11:00 AM
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Here's a good thread with the Heim rod in use



http://forums.corvetteforum.com/c4-t...te-pulley.html
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