EFI conversion thread, another one... Options

['73-914kid]

I seem to constantly bounce back and forth between carbs and EFI.

I used to be really pleased with the fuel economy of my 4-cylinder with carbs. I really couldn't complain about 30mpg on a carb'd 2.1L type 4. Well, with gas prices going back up, and having installed the 6, I'm getting a whopping 16-18 at freeway cruise, which is unacceptable for me. The motor is a 2.7 built to RS specs with S cams, and it really does go quick, but either the jetting is off, throttle shafts are worn (I know for a fact they are based upon carbon deposits on the butterflies), or I'm suffering from the fact that the 40's were never really meant for a 2.7, so the transition circuit is hugely rich.. becasue fuel mileage is awful.

Anyways, I have this vision in my head of removing the fuel lines, closing off all of the unnecessary ports in the carbs sans the air bleed screws, and essentially converting them into ITB's.

I would adapt a TPS onto one of the throttle shafts, plumb the intake manifolds for vacuum for the MAP, and then weld in injector bosses/bungs which are readily available, and cheap, from various websites for the standard 14mm bosch style o-ring sealing injector. There would be no permanent modifications to the carbs, just to to the intake manifolds.

Am crazy for even trying to attempt to start collecting parts for something like this? The hope is to not spend a whole lot of money on everything, and keep it bare bones with no ignition control, just fuel control.

Brain would be megasquirt, not sure what version yet, but I was also tossing around the idea of microsquirt. I'm not sure what would be the best avenue for something like this.

Any thoughts on this? Don't do it, don't waste your time? etc.