Thanks for the feedback. It would be interesting to see what the differences are in LSA's. I suppose I could stick a degree wheel and a dial indicator on it when I have it apart, but that's looking more and more like a waste of time. Yeah, it's a goofy idea, but that's my specialty.
No current issues, other than some phaser or tensioner knocking at cold start-up. It quiets down after about 20 seconds. At 158k I think it's better to replace everything before something comes apart. I'm really hot to install the updated followers too. This alone should boost the oil pressure considerably.
No problem......I kinda figured out what your motive was for asking this question concerning the possibility since you were gonna have the engine open doing a timing refresh. It's not a stupid question IMO thus why I made an attempt to actually find out if any real data exists in the wild to make a determination either way.
There is more data out there on the 5.4L 3V Triton camshaft profiles but you'd have to have inside access to Ford's engine design data which I don't. I heard FordTechMakuloco make reference to the 5.4L Triton having 3 different camshaft profiles used based on MY in 1 of his videos thus even within the 5.4L Triton family you'd have to run the VIN to then find out which camshaft profile version was installed in the engine in your Navigator to then have an idea of what you're trying to compare to..........
The Modular engine design parameters leaves practically no change in engine bore spacing from a 4.6L to 5.4L thus why the engine bore size, cyl heads, valve sizing & chambering along w\ piston dish depths are essentially identical (within <.003") so camshafts from a lift perspective should also be practically identical. The stroke length is the main physical difference (which also called for the extra block deck height in the 5.4L block) between the 2 engines.
IMHO, this idea would be more interesting if a set of 5.4L 3V Triton camshafts were swapped into a 4.6L 3V engine from a low end TQ application scenario due to the IVO, IVC, EVO, EVC, OL, ICL, ECL, GI advance but again it will depend on which set of 5.4L Triton camshafts you had........
In the end though, the swap prospect doesn't make a lot of practical sense IMHO using OEM cams across these 2 versions of Modular engines outside of conversation aspects.........but don't let me talk you out of doing it if this is what you want to do--you might learn something in the process we don't know or haven't considered.
The new design cam roller followers IMHO should be a 1st opportunity swap out on either a 4.6L 3V or a 5.4L 3V Triton engine, period (including point of sale). The 1st time you hear your Modular run w\ these newer units installed you'll understand...............
