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 really like the manifold you built. I know we don't have flow issues on the teener but the billet just looks better than the stock pipe. Will there be enough room to drop the engine with the manifold in place?

Allowing my mind to wander much farther than it should...

If the impedence mismatch is the only thing that prevents using that injector on a stock d/l-jet could someone design a driver pack for it? Use the stock injector signal as input to a fast response driver and wire the output to the new injectors?

There would still need to be a way of compensating for a different flow rate (no chance the two have the same flow rate). That could be done grossly through the pressure regulator then fine tuned as per normal with the richness adjustment.

Am I being too simplistic?

the biillet fuel rail was necassary to utilize these inj.. They have an O ring ontop not a barb.

NO the inj,s and fuel rail will need to be removed for an engine drop.

If you could design a cheap, and easy way to use high imp. inj. with the stock syst., THAT WOULD BE HUGE!!!!!!!

There are plenty of inj's. avail. with flow rates close to stock that are much cheaper and readily avail. . I chose this inj. because I was going to use a different FP and wanted a higher press. fuel system for better atomization.

This would give everyone the ability to use the stock FP and REG and just change the inj's.

It seems Everyone here has been looking for a viable alternative to the stock inj. ,

Keith

[swl]

If you could design a cheap, and easy way to use high imp. inj. with the stock syst.,

'fraid my days of playing with electronics are long passed. When I last fiddled with design the Apple II and TRS80 were fighting for top dog honors!

But I know we have a bunch of bright young electronics guys on the board - maybe they could take up the challenge.