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Unread 09-02-2011   #1 (permalink)
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Default Belt and route avoiding smog pump and A/C?

Is there a belt on the market for an 84 Mustang GT that would avoid the A/C and Smog Pump pulleys? I cant seem to phrase my question right in the search engine.

Also, to complicate my question, what if I install underdrive pulleys?

Perhaps my question should be, how would I properly measure the required belt, and can I order one, if such a product exists? (Custom length belts?)

Dunno, just a thought thats been running through my head. This has to haver been done a thousand times before right? Is the effort and cost worth it? What might the horsepower gain be? Any suggestions on how to make this question more annoying and un-answerable would be greatly appreciated. ; )
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Unread 09-02-2011   #2 (permalink)
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scR motorsports | Underdrive Pulleys

Because this is what I found online. It doesnt make much sense though, because ya know damned well the A/C and Smog pump require power to turn whether in use or not. Im sure miniscule on the part of the A/C when off, but....

Which brings up another quesion, the smog pump isnt in operation under full load is it? Or am I wrong?
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Unread 09-02-2011   #3 (permalink)
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Default ac smog pump serpentine

Hi, Ive done this several times. The problem Ive run into is this, is this, if you eliminate both the smog pump and the ac the belt cant be adjusted, the way it runs wont allow it. you must use an ac eliminator pulley/bracket or a smog pump eliminator bracket/pulley to get the correct angle. Ive had to have one or the other but not both in order to get the serpentine to work. The belt is 84.5" long. google "5.0 serpentine without smog pump" go to the first post (VMF) go about 3 posts down and you'll find a pic of the belt routing.
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Unread 09-02-2011   #4 (permalink)
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here's the pic of the serpentine routing
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Belt and route avoiding smog pump and A/C?-5.0-serpentine-routing.jpg  
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Unread 09-02-2011   #5 (permalink)
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Try this one for size:
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Belt and route avoiding smog pump and A/C?-fox-5.0-smog-ac-delete.jpg  
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Unread 09-02-2011   #6 (permalink)
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The ac uses no horsepower unless it's turned on. The smog pump drains around 3-6hp. I would just leave the ac alone and rout around the smog pump. It worked for me. Being an 84 it's a non serpentine car(v belts) correct? If so all these belt routing diagrams are wrong,if not I'm wrong. To find the length of the new belt just run a piece of string around the pulleys you're using and measure it.
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Unread 09-02-2011   #7 (permalink)
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this might help ya if you dont have v-belt
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Unread 09-04-2011   #8 (permalink)
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you really need to lose the smog pump and just put a pulley. i had an 1986 5.0 lx and i kept burning up alternators because the belt was pulling on one side all the time and killing the bearings.
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Unread 09-04-2011   #9 (permalink)
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You guys.... Thank You! I couldn't possibly have been given a better answer. AWESOME! I ended up reading so many things and so many opinions when I should have asked that question here ages ago. Again, thank you...!
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