5.4 Steel Accesory Belt Tensioner...
#14
That's due to my driving style...I usually only go about 1/4 to 1/2 throttle...I went 3/4 throttle on one of my test runs and that was when I saw the 12lbs...I was about to repeat that run to determine where I was in the rpm but that was when my tensioner snapped...I'm not gonna have tremendous boost because I have the aftercooler, 8.5:1 CR, and aftermarket Heads and intake...Once I get some decent cams I figure I'm gonna loose another lb or so...the 4.6 had the same setup (except with stage 3 Crower Cams) and I could only get a max of 15lbs with my foot to the floor...
If you get the right kind of cams, you won't loose boost at all, but if you get an NA cam, you will.
It all depends on how much overlap you have
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