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Originally posted by Black94 5.0:
Ok, yeah install the original pulleys back on and you should see some extra boost...

Do you have a boost gauge?

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Yeah basically the vortech belt is matched to the stock pulleys and with the smaller diameter pulley's on there I imagine the belt is pretty lose.
 

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Posted by Black94 5.0 (Member # 655) on :
 
It's not belt slippage, it's the crank pulley actual size difference that slows down the blower speed...

It's just like how underdrive pulleys slow down all the other accessories...
 

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Posted by Sicc98GT (Member # 1862) on :
 
can you leave the other two pullies on, or should you just yank them all?
 

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Posted by 88gt (Member # 579) on :
 
Yank them all.
 

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Posted by GTSLN97 (Member # 1849) on :
 
ya i had a feeling. i hooked up a boost gauge and am only seeing 4-5psi max. Which is sorta cool because that means that I am going to be a lot faster when i get it all fixed. You know where I might be able to pick up some pullies for cheap? Thanks.
 

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Posted by blind (Member # 3052) on :
 
go to the ford sale section and post a WTT underdrive's for stocks
 

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Posted by GTSLN97 (Member # 1849) on :
 
I was thinking, what about putting a smaller sc pully... that would make it better wouldnt it?
 

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Posted by vpr_klr (Member # 3353) on :
 
From what I've heard from some of the tuners out there is to not run underdrives as it puts extra stess on the crank and after adding a blower, it puts even more strees on the crank!! That's just what i heard though.....
 

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