Anyone have any feedback, info, or comments on undrive pulleys for an 05 5.4? Thinking about getting some and thought I'd do a little homework. Thanks in advance!

 

I put a set on my 07 Mustang GT and picked up some milage, no problems with A/C or overheating, I'm thinking about putting them on my 04 F-150 5.4, anything to help milage !

 

they will make your power steering a bit weak and your power windows (if you have them) slow at idle but other than that no problems unless you are adding a supercharger

 

well i'm not running a sound system other than the factory audiophile, but i do have power everything, i wanted to do efans and pulleys at the same time. do you think it will be worth it and make a difference in mileage/power. i have an edge, magnaflow side exit and kn CAI with a 2.5" level

 

I have the ASP pulleys on my 4.6l and gained 1.5 mpg increase over my best mpg runs prior.

 

what part number?

 

Part #: 528774

Brand NEW 1997 - 2001 Ford Truck 4.6 & 5.4 Underdrive Performance Harmonic Balancer & Water Pump Pulley Set.

A QUICK ECONOMICAL WAY TO INCREASE YOUR HORSEPOWER & TORQUE!

Application(s):

* 1997-2001 Ford Trucks (including Harley Davidson and Lighting Editions) with 4.6 & 5.4 Liter Engines

Product Specs:

* 25% Crank Reduction
* 26% Water Pump Reduction
* 12+ HP Increase
* Full Alt Charge @ 850 RPM
* Nitride Finish

* MANUFACTURED by ASP (Auto Specialties Performance)
* Reduces Parisitic Drag
* Up to 15+ HP Increase
* Increased Fuel Economy
* Belts Not Included (Gates Belt Part # Included in Installation Instructions)
* Professional Installation Recommended

 

just ordered mine, cant wait for them to arrive. whats so great about the nitrite(sp?) coating?

 

It's more less a coating done to metal to help protect against wear or corrosion, some people call it fused nitrate.

 

what about the hp gains.. is it worth it if thats all someones looking to get from them... thanks

 

how about 2005 5.4 underdrive pulleys seen any of them

 

I think it really depends on the vehicle. I noticed a big difference in my 5.0 Mustang but with the truck I'm really not sure about big hp improvements. It could be all the extra weight (compared to my car) but I did notice that the truck seemed to shift less going up slight inclines (at the same speed) where it would down shift prior. The thing that makes it difficult is these are pricey because you are replacing the harmonic balancer where on my 5.0 they were about $50-$60 (crank pulley, water pump pulley, alt pulley). Troyer claims decent hp gains on the dyno and they seem to be somewhat close to real world numbers. I guess it comes down to what you like, I like underdrives and wouldn't hesitate to put them on any of my vehicles but others claim nothing but headaches.