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)

[roblav1]

My 2.2E targa MFI got 17 mpg highway back in 1982. Carb engines got about the same. No doubt MFI is cool, but crazy expensive.

[horizontally-opposed]

My 2.2E targa MFI got 17 mpg highway back in 1982. Carb engines got about the same. No doubt MFI is cool, but crazy expensive.

Yep, I'm in the teens with carbs—and they're dialed in. Seems ridiculous for a car that weighs 2100~ pounds. While fuel economy is near the bottom of my list of "must haves" in my 914 (and thus I am not in any rush), K5 Blazer fuel efficiency sort of grates on me.

And here I thought I was making a funny about the mpg, but… https://ck5.com/forums/threads/good-fuel-ec...y-on-k5.144786/

Pete,

You’ve seen my car at the EASY get togethers and have probably heard me rave about how much I love my EFI conversion with PMO ITB’s and COP’S on my 3.2 conversion in my 73 long hood. Next time we meet up I will let you take it for drive to see what you think.

For me, in addition to the significant performance boost from the conversion, which I wasn’t expecting, the other main reason I did it was to give the engine bay that old school vibe since the PMO’s look just like carbs plus I love how uncluttered the engine looks. See for yourself.

Your 73 is gorgeous, Steve, and I'd love to take you up on that.

There are a lot of relatively new and interesting EFI options right now, from Clewett (already have their crankfire ignition trigger with Electromotive) to Rasant to several others. Some of the newer ITB hardware is really beautiful, too, but I have to say my leanings are toward the PMO hardware you have due to compatibility with the factory airbox and likelihood of long-term support. The promise of long-term support is where carbs, MFI, CIS, and Motronic shine bright—but only two of those were offered with a 2.2.

What is your MPG with your 2.2? mine with good tune is really crap ?
Sorry no intent to hijack from the OP.
(IMG:style_emoticons/default/beer.gif) .

No apology needed! This is very much the kind of discussion and data points I hoped for. (IMG:style_emoticons/default/beerchug.gif)