1990 Mustang GT Super Charger Question
Hi Guys,
Just hoping to get some answers. I have a 1990 Mustang GT with the 5.0L and I have added GT40 Intake and Heads. I have also added a Powerdyne Super charger. The question I have is that I could only pump out 4-5lbs of boost. Supposedly it should pump out 8lbs. Would an Under Drive Pully Kit cause this?? Since I have that istalled also. Or Could it be that the GT40 Intake and Heads give no resistance?? Just wondering. I have had this problem since it was first installed. I know I am just grasping for straws but any help would be greatly appreciated. Thanks in Advance Peter |
Originally Posted by pserra
(Post 148582)
Hi Guys,
Just hoping to get some answers. I have a 1990 Mustang GT with the 5.0L and I have added GT40 Intake and Heads. I have also added a Powerdyne Super charger. The question I have is that I could only pump out 4-5lbs of boost. Supposedly it should pump out 8lbs. Would an Under Drive Pully Kit cause this?? Since I have that istalled also. Or Could it be that the GT40 Intake and Heads give no resistance?? Just wondering. I have had this problem since it was first installed. I know I am just grasping for straws but any help would be greatly appreciated. Thanks in Advance Peter |
I am sure it is a minor issue and shortly you will have many educated replies-good luck
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Originally Posted by pserra
(Post 148582)
Would an Under Drive Pully Kit cause this?? Since I have that istalled also. That is the problem... An underdrive pulley slows down the speed of your accessories, one of which is the blower. |
Originally Posted by roddy
(Post 148636)
That is the problem... An underdrive pulley slows down the speed of your accessories, one of which is the blower.
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Remove the pulley and you'll be golden.
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So do you mean to put all the original pully back on?
or Do mean, put a smaller pully on the Super Charger Thanks Peter |
I am a big fan of stock, other guys not so much. New answers coming shortly lol
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Ditch your underdrive pulleys and go back to stock. Once you know where you are at you can look into a smaller blower pulley to get even more out of it if you choose.
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If you want more power through pullies, throw the underdrives in the garbage and put a bigger crank pully on (overspeeds the blower), or a smaller blower pully on (overspeeds the blower).
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