Carl Fausett

The 1980-84 928 equipped with L-Jetronic fuel system used a funny little injector that has an o-ring where it enters the manifold, and a hose barb on the top where a 2" piece of rubber hose and 2 clamps attach it to the fuel rail.

These injectors aren't made anymore, and harder than heck to find in good used condition. That, and their $200-a-piece SRP make them not so "funny" anymore.

We have designed a custom replacement injector that fits the stock L-Jet manifold, and allows the use of the more common late-model fuel rail up top. This gets rid of the hose-barb issues and clamps, and also allows you to upgrade to our billet aluminum fuel rails if you'd like.
http://www.928motorsports.com/parts/...l_rail_kit.php

These injectors are designed with a 3.5 Ohm impedance (that the L-Jet requires) and the correct flow rate (24 lb/hr at 3 bar) so that not tuning is needed.

An L-Jet customer would only have to make his own fuel lines and fuel rail hold-down brackets.

As a bonus: if you are an L-Jet tuner, we can also make these in 27, 30, and 36 lb/hr flow rates.

The complete description and prices are available on our website here:
http://www.928motorsports.com/parts/ljet_injectors.php

Although the injectors are custom-made, I think you will find the price very competitive.

Here are some pictures:

Ducman82

you know ill be getting a set! next month baby!

G Man

I thought this was already possible for L-Jet owners to do by changing to the newer type of fuel rail set up and buying the correct injector. Was unaware that custom injectors needed to be manufactured.

IcemanG17

VERY NICE......

toofast928

Thanks Carl, Your just 5 months too late for me. I converted the whole engine management system just to get 36# injectors........

Steve Phipps

Sounds great! Looks like it would go great with my 83" Euro Ljet project. Looks like it would clean up the area (getting ride of the 2" rubber hoses), upgrade the fuel rail and even look cool.

Why do you not offer a complete package with " fuel lines and fuel rail hold-down brackets"? Are the fuel lines and brackets easily available? Sorry if this is too much of a "newbie" question, but I like the plug and play option as much as possible as I don't have all the extra tools to make brackets, etc.

G Man

Got this off of Carls site :1980-1984 16v L-Jetronic: use these rails to convert from your early barbed-injector style to the more popular and available Bosch late-model injector. Buy just the fuel rails, you will need to make your own hold down brackets and fuel lines

So are there already injectors available if you have the fuel rails or do you need to buy the custom injectors. The way it's worded I take it that off the shelf injectors are readily available for a conversion. I'm confused??

Carl Fausett

The two products (aluminum fuel rails and these injectors) compliment each other.

Getting an injector with the correct size o-ring for an l-jet manifold, the correct o-ring for the late model fuel rail, the right height, the right low-impedance for the l-jet computer, and the right flow rate proved difficult for buyers of our fuel rails.

So I had them made.

Ducman82

does the new injectors use the same injector clamps to hold the injectors on the L-jet intake runners? or do they just sit right, and are pressure held by the rails like the later model injectors?

Carl Fausett

You are still ahead of the game, Tony. You can tell just by looking that the L-Jet Air Flow Meter was a huge restriction that you have now removed. These injectors are for guys who want to keep the L-jet, but replace their old injectors and rusty fuel rails.

Pulling all the injection wiring harness and L-Jet computer and replacing with all different pieces, wiring, and sensors is an ambitous project that not many will undertake.

Your supercharger install looks polished and professional. Good job!

Carl Fausett

If using the stock late model 928 fuel rails on these injectors, there will be hairpin clips used to lock the injector into the rail.

If using the billet aluminum fuel rails, you must use hold-downs to hold the rail down to the manifold. The rail secures the injector in place.

Carl Fausett

At the moment, I do not have an L-Jet car to use to design, test, and make those brackets, or I would and I would offer them as a kit.

If someone wants to bring me their L-Jet for a little while, I would be happy to make a fuel rail hold-down kit.

The fuel lines are easy with our rails, just -6 AN fittings and hose. I have Metric ball flare to -6 adapters in stock... straigh, 45 deg, and 90 deg.

Ducman82

thats what i thought. i just wanted to make sure. was thinking of cleaning up my runners by cutting off the clamp hold downs if they are not used.

Carl Fausett

You will find that the 32v LH-Jet fuel rails have brackets spot welded to them that do not line up with anything on the 16v manifold. You could cut those off, but you do need some sort of hold down on the fuel rail elsewhere. Do not rely on the hairpin clips alone to keep your injectors from popping out.

If you can find a set of fuel rails from the 310 HP LH-Jet equipped 16v motor, they would be a direct bolt-on. But I am sure you can understand how unlikely you are to find a set of these loose somewhere.

Jim Nowak

I'd be interested to but I would want a complete package to replace my 86 Euro S fuel rail.