96 Disco Fuel Injector specs

[DiscoEd]

Greetings,
Does anyone know where I can obtain the flow data for the injectors used in my 96 Disco?

I beleive they are made by Lucas, but I have had no luck in finding this information.

Regards,
DiscoEd

 

[ptschram]

Greetings,
Does anyone know where I can obtain the flow data for the injectors used in my 96 Disco?

I beleive they are made by Lucas, but I have had no luck in finding this information.

Regards,
DiscoEd

Coil resistance, 16 ohms

Flow rates, ~175 ml/min, or ~19 GPH.

If you look through the service manuals, they will provide you with flow data.

These are practically generic injectors.

 

[DiscoEd]

Confused by the numbers...

Thank you for the reply but I must admit that I can't make the math work out.
How did you calculate the 19 GPH?

What am I doing wrong?

175ml/min = 175 cc/min
175cc/min / 10.5 = 16.666 LBS/hr
16.6 LBS/hr / 6 = 2.77 GPH

or

175ml = 0.046230109 Gal
therefore
175ml/min = 0.046230109 Gal/min = 2.77 GPH

Thanks,
DiscoEd

 

[ptschram]

Sorry Ed, I posted that after having had a bad day yesterday, 19 pounds per hour.

You can use any of a number of injectors in these engine with varying degrees of success. I'm assuming you're looking for replacements at less than the King's ransom prices charged by Rover vendors. If you retain the existing pressure regulator and engine management system, you should probably try to stay near the stock flow rates.

While I do not have the same experience working with the GEMS engines as I do with 14 CU(x) Lucas engines, I strongly suspect that the ability of the GEMS ECU to compensate for greatly varying rates of injector flow are limited. Published limits of control are +/-0.625 of ideal.

I have run 24 PPH injectors in a 14 CU(x) truck with less than stellar performance. The engine ran well, started great, but fuel economy was horrible. Rovacom-Lite to the rescue, I discovered the truck was running very rich and the ECU was only able to exercise limited control over injecotr pulse width and this control was not sufficient to return the stoichiometry to acceptable levels. Keep in mind I did not modify the fuel delivery system other thant he injectors. A tweaked regulator may have been of use here, but for my purposes, my reseacrh goals had been met-perhaps with results other than those desired, but my knowledge had been increased-always a good thing.

Peace,
PT

 

[DiscoEd]

No Problemo!

Sorry Ed, I posted that after having had a bad day yesterday, 19 pounds per hour.

You can use any of a number of injectors in these engine with varying degrees of success. I'm assuming you're looking for replacements at less than the King's ransom prices charged by Rover vendors. If you retain the existing pressure regulator and engine management system, you should probably try to stay near the stock flow rates.

While I do not have the same experience working with the GEMS engines as I do with 14 CU(x) Lucas engines, I strongly suspect that the ability of the GEMS ECU to compensate for greatly varying rates of injector flow are limited. Published limits of control are +/-0.625 of ideal.

I have run 24 PPH injectors in a 14 CU(x) truck with less than stellar performance. The engine ran well, started great, but fuel economy was horrible. Rovacom-Lite to the rescue, I discovered the truck was running very rich and the ECU was only able to exercise limited control over injecotr pulse width and this control was not sufficient to return the stoichiometry to acceptable levels. Keep in mind I did not modify the fuel delivery system other thant he injectors. A tweaked regulator may have been of use here, but for my purposes, my reseacrh goals had been met-perhaps with results other than those desired, but my knowledge had been increased-always a good thing.

Peace,
PT

Greetings PT,
Hey no problem with the mix up there, I know what you are saying about the bad day. I had a rough one myself on Friday and I was even wondering if I was loosing my mind as I was trying to make the calculations work out.

The quest here is two fold, One gola is to avoid paying the "King's ransom" the second goal is just to verify the flow rates on my injectors. I've machined up my own flow bench (still somewhat in progress, it's an evolution thing) and just would like to have a ball park idea of what the flow rate should be.

Much of the added grief, trouble, heartache, depletion of fund, etc. that I subject myself to is geared towards the quest of knowledge. (and of course I'm cheap when comes to paying others for labor)

Thanks for all the help PT.

Best Regards,
DiscoEd

 

[ptschram]

Machined up a flow bench? LOL. And they say I reinvent the wheel.

I used a fuel rail from an engine laying around the shop, a fuel pump, similarly laying around the shop and a ring stand to support it all. Dead-man switch for the fuel pump, and separate wires to each injector as needed.

Worked surprisingly well to determine which injectors didn't leak as badly as the rest.

Someday, I'll get an ultrasonic unit for the "Earthquake" machine as Shopboy calls it.

I won't pay someone to do something I can do myself.

Peace,
PT