Jet underdrive pulleys

[rydinhigh]

I got a set of Jet underdrive pulleys for my X. Does anyone else have these that can share a few install tips? Also do I need to get a different belt? If so which one should I get (part # please). Would I still be able to use these with a super charger?

Thanks,

Mike

 

[james t]

You dont run an underdrive crank pulley with a blower. It makes it run slower, thus giving you less boost. Are the pulleys you have for a mustang? Last i heard no one made any for the 5liter X...

 

[boominXplorer]

look then up on www.truckperformance.com for a mountaineer and they come up. nor for explorer. I also checked the mustang part # and it was different

 

[rydinhigh]

James thanks for the info about not running them with a blower. They are Jet Performance pulleys made for the Explorer. I called Jet and gave up after being on hold for 10 mins. I then e-mailed them earlier today and haven't heard anything back yet. If they don't get back to me soon I am just going to send them back.

 

[X~FACTOR]

Underdrive crank pulleys are okay. Its when you try to combine it with larger pulleys for the water pump and alternator is when the problem starts. I know they use to sell them in sets for sports cars a few years ago. I fell for it and it gave me nothing but problems with the alternator and over heating issues.

Let us know the before and after performance when you get done installing.