Gas vs PSD
Lead Driver
Joined: Jul 2007
Posts: 7,868
Likes: 9
From: Rhode Island
Actually a normal waste gate actuator is perfectly capable of controlling a VGT turbo. They even have aftermarket electronic VGT controllers now! You can pretty much make the turbo spool at idle with them.
Postmaster
Joined: Oct 2006
Posts: 4,171
Likes: 12
From: SE Texas
JL
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Modular motor junkie
Joined: May 2009
Posts: 6,190
Likes: 8
From: Texas
It could be made to deal with the boost just fine. I have seen a 4.6 made to run 30PSI.
Hotshot
Joined: Jun 2007
Posts: 10,008
Likes: 7
From: Austin, TX
at that point i need headstuds, valve springs, and then i should be able to take it up a few more notches. i already have both of those so i'm ready to do some rat killin'. 
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Modular motor junkie
Joined: May 2009
Posts: 6,190
Likes: 8
From: Texas
The V10 does not need anywere near the boost you 7.3 does to make big power.
How long can you run WOT before your EGT's get out of hand?
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Postmaster
Joined: Apr 2008
Posts: 4,724
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From: Rogersville, TN
I run 18 psi on a 2.3 four cylinder with no issues. A v10 can handle 8 psi with no mods at all. Above 8 and you are looking at needing an intercooler. I highly doubt you would need more than 8 psi on it though.
Lead Driver
Joined: Jul 2007
Posts: 7,868
Likes: 9
From: Rhode Island
A mild turbo on a V10 would be interesting, just a few PSI boost. Not really enough that it would add tons of power, but you'd have the benefit of not loosing power at altitude. Or get a VGT turbo and move the torque peak down a thousand or so RPMs. Amazing what a turbo can do.
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Modular motor junkie
Joined: May 2009
Posts: 6,190
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From: Texas
Posting Guru
Joined: Oct 2009
Posts: 2,066
Likes: 4
From: Rogue River, Oregon
There's some good articles in this months issue of Hot Rod magazine about turbo stuff. If it's semi-affordable, I'd love to turbo mine. As stout as it is now, I'd love to see how it would be turbo'd! I mean look at the huge difference it makes with diesels!
Elder User
Joined: May 2010
Posts: 650
Likes: 0
From: WV
4.6's are nothing like our engines though. The only comparable engine is the 5.4 and seeing as ford was willing to back that one with a supercharger (i.e. put a warranty behind the truck), I would presume it can handle a few psi.
Postmaster
Joined: Oct 2006
Posts: 4,171
Likes: 12
From: SE Texas
The modular engine family are all built the same. Same materials, same process, many shared parts. The only components that are not the same between a 4.6L and a 5.4L/6.8L are the items that are affected by the longer stroke and deck height of the engine. They all use the same con rod bearings, main bearings, piston rings, camshafts, followers, valvepsrings, etc, etc, etc.
The only difference between the 5.4L in the Lightning and the N/A version are the pistons and the induction system. Some people will talk about the crankshaft being different, but some of the N/A 5.4L engines had the forged crank as well,so that's not really worth discussing.
6-8 psi of forced induction boost on a stone stock modular will last as long as you don't abuse it, and have it tuned properly. And with that small amount of boost on the 6.8L, it'll show impressive gains.
JL