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]

I tried using high impedence injectors from a 89 vanagon 2.1 and they seemed to strangle the system. It needed to be tuned too rich all the time. I switched back to stock injectors and now have the mixture in the dead center of lean and rich to tune, also better idle as well as smoother running through the spectrum. I'm using the SDS EM4. My mechanic likes it because it's infinitely tunable. He's going to take it to the dynojet in the next week or so to make fine tunings throughout the range. I liked the idea of using high impedence injectors also but the flow just wasn't good enough.

That's a weird one.

One inj. you have to add imp.

The other is built in

There should be no diffrence in hoe the inj. or the system functions.

Hey! if it's working ,that's a good thing (IMG:style_emoticons/default/biggrin.gif)


Jake, what are you AFR's when you start to tune? Is it 13:1 accross the board?

What are good EGT's.