Hey all! I posted this in my 5.4 DOHC Swap thread, but thought I would make a new thread for it as well as it might be overlooked.
As I was walking through the salvage yard the other day looking for an idler pulley for a friend's Focus, I stopped and looked under the hood of a 5.4 F150. I thought "hmmmm....that throttle body looks bigger than the stock 4.6 Mustang unit!" Sure enough, I got it home and compared the two and it was considerably larger! Research that I have found shows the stock 4.6 unit is 65mm and the F150 unit is 75mm. They use the same bolt holes and everything!
I had to reuse the 4.6 throttle body blade shaft as the F150 shaft has the cable pulls on the opposite side of the axis. This required slight modification to the shaft as needed to slide the 75mm blade into the shaft made for the 65mm blade. I also had to drill a small hole in the throttle blade to match the 4.6 setup as the F150 unit uses a bypass built into the TB casting. From my understanding this is for idle improvement as the IAC tends to surge without it.
Not a bad upgrade for 20 bucks!
As I was walking through the salvage yard the other day looking for an idler pulley for a friend's Focus, I stopped and looked under the hood of a 5.4 F150. I thought "hmmmm....that throttle body looks bigger than the stock 4.6 Mustang unit!" Sure enough, I got it home and compared the two and it was considerably larger! Research that I have found shows the stock 4.6 unit is 65mm and the F150 unit is 75mm. They use the same bolt holes and everything!
I had to reuse the 4.6 throttle body blade shaft as the F150 shaft has the cable pulls on the opposite side of the axis. This required slight modification to the shaft as needed to slide the 75mm blade into the shaft made for the 65mm blade. I also had to drill a small hole in the throttle blade to match the 4.6 setup as the F150 unit uses a bypass built into the TB casting. From my understanding this is for idle improvement as the IAC tends to surge without it.
Not a bad upgrade for 20 bucks!