2.4T MFI setup on ebay...EL CHEAPO!
 

What would the advantages / disadvantages be of switching from PMOs to MFI?

From what I've read here, they seem to be:

Advantages:
- increased HP
- better fuel economy (a key objective of mine)
- ??

Disadvantages:
- difficult to set up properly
- high maintenance cost
- slightly less throttle response
- ??

Have I missed anything?

Actually, I would argue that MFI gives better throttle response. The problem with 911T MFI is that it's for a 911T...smaller stack diameter than the 911S.

Could throttle bodies be adapted for this to simulate high-butterfly injection for a 3.0L motor?

Throttle response is the whole thing about MFI. Due to the very high pressure of the injection, fuel atomisation is excellent. This equals less 'lag' when you punch the throttle, because the fuel is in a combustion-friendly state.
Carbs? Pah!!

Paul, I don't really see the smaller bore of the T's being an insurmountable problem. It's easy enough to bore out the nylon stacks, leaving you with just the throttle bodies.
The places that recondition eg Webers can easily take the TB's out and install new, larger butterflies. Cam B's have been taken out to 40mm in this way.
I gues an old, cheap MFI set would need reconditioning anyway, so not really much loss there.
That's not to say that a decent S set would be preferable, but this set is waiting and cheap!

So... would a change from PMO's to these be recommended? (keeping mind "L" cams)

What would you expect the cost be to recondition the MFI?

What additional parts would be needed? (e.g. stronger fuel pump, return line, etc...)

Would the benefits outweigh the costs?

mfi....just what I need....i will win these parts!

Don't let the cheap costs fool you. Rebuilding a pump costs $900 or so, and rebuilding t-boddies is another $500 or so...

-Wayne

wayne your right. i emailed the guy and he doesn't know if the unit works! anyone got a 2.4L mfi unit for sale??

whiteknuckles - looks like a find, and a good start to build your early S around.