Thread: EFI for my 200 I6

Tweet

I'm rebuilding the 200 I6 in my '67 Falcon, and turbocharging it ( will have 8.3:1 static comp ratio ). it will be run blow through at 6-10 PSI with an intercooler. I would like to have Throttle body injection on it, for reliability, and the tunability factor, working with the Turbo and such. I know that even tho there is no kit to put EFI on a small Ford I6, it is possible, I can get thru the mechanicle end of the EFI, like a DSII distributor will give the VR signal the computer needs to tell cam position, and I know there are bolt on throttle bodies that bolt right on the integral head, such as 1's from ford Tempo's and early Escorts. also the electric in line high preassure fuel pump, with a boost refrenced regulator. but my question is, I need an aftermarket tunable brain box that will be able to cope with the Turbo, I'v heard people rave about Megasquirts and that seems like a viable option but I'm not great with electronics and these need to be put togther ( putting the main chip togther ), but I could pull it off, also heard about FAST XFI brain box's and these are supposto be great also, and a few other company's making brain box's like the XFI. what should I be looking for or asking for as far as tunability?

Well, I'm going with Megasquirt II V 3.0, they sell the box's assembled and tested for $400. now all I need is a DSII distributor, MSD spark box, MSII 3.0 box, wiring harness and a Ford Tempo/ Escort Throttle body and some new injectors for it, and a few other misc parts like a wideband O2 sensor.

anybody got any idea's?

well for a proper operation you will also need an o2 sensor to keep your computer giving a proper fuel mixture.... as well as a manifold absolute pressure sensor(map) to let the computer know the load condition on the engine.... depending on how much you're boosting you'll need different injectors as well as a high pressure fuel rail.... i know the stock escort ones only have about 9lbs.... but since you're boosting you'll want more like 15-20lbs rail pressure with your TBI..... also you'll want to make sure that the TPS on the throttle body works properly to give the computer a better knowledge of where the throttle blades are out.... then again... if its an aftermarket configurable system... why dont you drill your intake runners and make it SFI you'll get better fuel economy and more power than a TBI unit... it'll be more expensive cause you'll need 6 injectors instead of 1 or two depending on the throttle body... but you still need the throttle body for the the blades and such.... i dont know the system you're using tho so you'd have to play with it a bit to get the injectors to spray exactly when the valve opens....also what kind of injector pulse does your box use or is that customizable... ...... theres a lot more to it with injection than carburation...

ok i did a little looking up on your box and it doesn't yet support sequential fuel injection but it will mid 2007... throttle body injection is more simple to setup but definately not as efficient... you'll still need all the sensors i noted earlier, but less injectors, less wiring and less work..... btw if you're planning on running dual exhaust you'll want to run 2 o2 sensonrs or else your computer is going to get a lean signal half of the time and try to richen your mixture on you

oh, yeah I forgot to mention. I'll be using a wide band O2 sensor and the MSII box comes with a 20 PSI max MAP sensor. I thought about going true SFI but I'm getting a new better cylinder head and if I make an oopsie, it's a $300 mistake. I'll get it going with a standard TBI setup then if that runs good and I feel comfterble with it, I'll pull it apart and drill for injectors, I arleady would have the controller, would just need recalibrated. as for the TPS, I'd probably throw a new 1 on the Throttle bodie. The MSII uses a VR signal ( can be got from a Duraspark II distributor or even a MSD box can provide it ) to pulse the injectors, pulse width and all that is changable, for cold start, warm and operating temp. there is a TPS calibration wizard to take care of TPS complications. I knew about needing new injectors. 36 # per hour is what I should be using, I'll run 15 PSI of fuel preassure with a boost refrenced EFI fuel preassure regulator.

The Megasquirt is getting popular, by far the cheapest tunable ECM your going to find, started out as a build it yourself box, giving all the parts and good instructions selling in ' group buys ' but now 2 places sell assembled box's and Megasquirt kits. the place I'm getting the stuff from is www.glensgarage.com the software is free downloadable off the official Megasquirt site