FI retrofit, it's done!!! Options

[toon1]

I've been working on retrofitting newer fuel injectors for the 914. My goal was to find an injector that can utilize as many of the stock parts as possible.

I came up with a inj. off a 96 forn escort 1.8l motor.

One comment is needed, this will only work with an aftermarket FI system s these inj. are HIGH inpedence.

This setup gives the ability to use higher fuel pressure, 44psi . It has a lower flow rate than the stock inj.. so the pulse widths will be longer and should give a little better idle quality.

these are disc style rather than pintle( stock). fuel atomization will be much better giving a cleaner, more efficiant burn.

The length of the inj. where shorter than stock so I added an O ring to make up the difference.

The plastic tips are different ,I cut them off and put the tip of the stock inj. on the new inj., fit perfect. now the stock tip O ring can be used.

the fuel rail was machined to tolerance for the top O ring seal. And I made a bracket to support the fuel rail from vibration and also keeping it from popping off the top of the inj.

Here's the setup assembled. enjoy

[toon1]

Hey Toon,

it looks real good and i'm doing the same thing on mine but you're ahead with the fuel rail part. I'm still on soldering the boards now.

Maybe some of you guys may not realized this, MegaSquirt fuel metering unit will litterally replace all the old 914 fuel system components (such as AAR, 914 FPR, brain, etc) that are intertwined together in order to function. It's such a pain in the ass to find replacements on some of these components, in fact, NLA!! I CAN'T HARDLY WAIT TO TRY THE MS AND SEE HOW WELL IT WOULD RUN!!! One of these days, I'll get the MS that will deal with fuel metering and spark control, boy, that ought to help a lot and eliminate the distributor issues.

I was a bit surprised you had to use the escort FI connectors. If I remembered right, they're the same as the Bosch connectors (T1) except for some bigger injectors that use Ford connectors (T4). I would also use the 914 harness and spline the end of harness (toward the brain) into the MS plug pigtail, that way I can keep the appearance of 914 harness.

anyway, keep on going Toon, and hopefully i'll get around to show you mine. Right now, I'm doing one for my Audi Turbo Quattro then will do my 914.

cheers,
j

With running MS you can do away with almost all of the stock FI components.
I am using the CHTS and the ATS with easytherm

The AAR can ( and in my case, will) be replaced with a fast idle selonoid. This will give the user the ability to shut off the air bypass when the CHTS reaches the temp. that MS ignores it. this will be nice to get away from the lean miss that accomponies a lagging AAR.

It is possible to run MS1 and control spark with MS&S extra if you don't wont to shell out the $$$ for a MSII.

In regards to the inj. connectors, I wanted to use the Ford connectors because, to me, they are a far superior connector than stock. There is a rubber seal rather than a boot and it locks into place.

Good luck with the Audi sounds like a fun project. Doing a MS retrofit has made me a FI junkie.

My next project is to fuel inject my 32hp briggs and stratton boat motor (IMG:style_emoticons/default/happy11.gif)