basic tech behind adding non oem belt driven accessories

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I am considering adding some non-oem belt driven accessories. What are the basic things to get it right. I would guess, the location of the accessories does not mater, unless dunking the motor is common. How do you measure-design-align the plane of the belt to be perpendicular the axis of the pulley. Do you typically scavenge a pulley from an oem piece, how do you know if the diameter of the new pulley is not over or under working the accessories. What other things are important to watch out for, or plan around.
 
that's a lot of insightful questions coming from a redneck....

I'd use the pulley that came with the accessory to be sure, to measure just take a string and wrap it around the final route and measure it and the diameter of the pulley grove. Alignment can be eyeballed, and shimmed accordingly.
 
make sure it is rotating the correct way ;)
 
that's about the long and short of it..
 
Beau,

It is a little more complicated than that but that would be the crayon version of it.

Something else to consider is the type of pulley (depth, width, etc.) you want your pulleys to match these so that your belt ride in all your pulleys at the required depth. Another factor would be mounting the item. Can you utilize existing holes or will you need to drill and tap or make a custom bracket. A good thing to do is create a template for your stuff and then you can visualize and move items as required.

This is definitely not hte hardest mod but it definitely needs to be well thought out before you learn the hard way.

Glen
 
visual belt alignment. 1/3- 1/2 of belt contact to the pulley.

I put a york on. Using the stock pulley gets it closer to proper rpm. Many crank pulleys seem to be very similar in size.

I like the crank for driving pulley, rather than adding extra load to another accessory
 
Think that would screw up the warranty on a newer car?
 
make sure it is rotating the correct way ;)

Would this really matter on a rotary pump? Couldn't you just make outlet the inlet and vice versa? I'm also we are just pumping air.

brownbearvisual belt alignment. 1/3- 1/2 of belt contact to the pulley.

I put a york on. Using the stock pulley gets it closer to proper rpm. Many crank pulleys seem to be very similar in size.

I like the crank for driving pulley, rather than adding extra load to another accessory


I had planned to run my compressor off of my a/c pump, which doesnt work anyway, by adding another pully to it.. If the air pump is not engaged would it really put that much strain on the other pump?
 
I was not being specific to compressors but I woudl say yes it does.. Valves within the compressor might be an issue. But if you look at the clutch on a compressor you will notice the a good chunk of them at least are designed to support one way more than the other direction..
 
I was not being specific to compressors but I woudl say yes it does.. Valves within the compressor might be an issue. But if you look at the clutch on a compressor you will notice the a good chunk of them at least are designed to support one way more than the other direction..

UGGGG! Now I need to make sure the pump I got goes the right way.
 
Voiding warranties on our vehicles is typically the last thing we're concerned about here :]

Notice he did not say what kind of vehicle he was asking about.

(probably because it's a heep)
 
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