For flat sixes: Webers v MFI v EFI, Ecologically speaking… Options

[horizontally-opposed]

Currently have a 2.2E/S with Webers. It runs well and makes good power, having been tuned on the dyno and further dialed in since then, but I have discovered I'm just not a carburetor person. Fuel economy isn't good enough for the size of engine/car, and the emissions bother me—both in terms of the smells in my garage and while driving the car. And yes, we've been totally spoiled by low emissions cars.

What I'm curious about, for anyone who has lived with carbs and MFI: Is MFI noticeably cleaner and/or more efficient than carbs?

Or is EFI the way to go? I'm in no hurry on this, but curious for the experiences of others. Yes, Motronic, but I actually like the 2.2 engine.

Thanks! (IMG:style_emoticons/default/beerchug.gif)

[horizontally-opposed]

I can see where PMO carbs are attractive to someone building an engine or a car for all the reasons listed, but they don't make sense for me.

I rolled the dice and bought a set of used Webers from Pelican Parts years ago for less than what cores cost now. Had them gone through by someone very familiar with Webers before they went on the car for seals, etc. Only suspect thing was a bit of wear on one shaft...but it wasn't enough to be worth dealing with. After the better part of a day on a chassis dyno and some subsequent fiddling, they're good. Car starts first try if it's been driven within the last few days, and will start in the first couple of tries if it's been sitting—and this is without the luxury of a 914-6 choke. Engine pulls nicely from idle to 6000+, and is pretty hard to catch out. Jump on the gas too quickly and you can sometimes get ahead of the carbs, but that's about the only niggle. I'm happy in all those regards.

New PMOs would need to be dialed in, and present most of the same problems. This thread has me moving the goalposts away from MFI (cost, emissions, etc) and towards EFI, possibly on PMO TBs to keep the factory 914-6 airbox—which I really like—and because I suspect parts & support will be available for a long time to come.

That leaves which engine management system. A lot of good inputs here to consider.