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)

[burton73]

I can tell you one thing, MFI on an E or S when tuned well will pull super strong in every gear. On my 73 S it ran great when the MFI was synced well but the tune would fall off in not that long and then it just pulled well but not as good as just right out of tune.

CIS ran well and kept its tune for a very long time. Always started right up and ran the same (good) all the time. Monotonic always ran good for me in my Carrera.

CIS and Monotonic always worked great.

I have PMOs in 46 for my 6 and we have to work out the tuning after we get the break in of the Engen. I think the PMO 46 where like $6,000. If you are not going to run your car all the time, carbs IMHO need to be run and not just sit for a very long time or you have to dich with them.

The thing is that the EFI when dialed in run all the time.

As far as the gas mileage it never meant anything to me.

Bob B