MFI Pump Dyno build- My newest project

[356RS]

I finished cleaning all the 015 pump parts and installed the #53 Euro S space cam last week and it's ready for calibrating.

Picture of the governor spring capsule:



The #53 Euro S space cam:



A cleaned plunger assembly:



Inside Regulator after cleaning:



Plungers and rollers installed and ready for camshaft:



Ready for calibrating:

[356RS]

Calibrating the pump took me a day to get it right.





This is what the final tests looked like:



Keeping records:




Close up of injector at 3000 RPM and full throttle:



And test tube filling up fast:



The pump calibrated perfect.

[cfc]

Mark

Do you have the info you need to do a RSR racing pump, Red Cap?




QUOTE=356RS;4698837]I finished cleaning all the 015 pump parts and installed the #53 Euro S space cam last week and it's ready for calibrating.

Picture of the governor spring capsule:



The #53 Euro S space cam:



A cleaned plunger assembly:



Inside Regulator after cleaning:



Plungers and rollers installed and ready for camshaft:



Ready for calibrating:

[/QUOTE]

[jcge]

Congratulations Mark - tear down, repair and recalibration accomplished. You've opened (and conqured) the "black box" of MFI. Well done.

Your efforts here and your willingness to take the time to document your equipment, methods, successes (and failures) are greatly appreciated.

There's another question that I've been kicking around for a while....and it's really the basis of custom space cam design.

What is the fuel delivery rate (cc/1000 strokes) vs speed (pump rpm) vs rack position (mm) ?

That is - the delivery characteristic of the pump section independant of the space cam.....

I assume that the sensitivity to speed (and viscosity) is relatively low. And that it's (roughly) linear (cc/1000 vs mm), and that it's a little different between the early "milled" plungers (2.0-2.2) and the later "ground" plungers (2.4+) assemblies......

[David E. Clark]

Fabulous accomplishment Mark! Most people thought what you have accomplished would be impossible outside a Bosch service facility or specialty injection shop. I remembered an old thread, very technical MFI question, wherein Milt AKA: Zeke was considering attempting what you have done and the prevailing view was that it would be impossible. Here is a quote from one of our moderators, John Cramer, in that same thread:

Originally Posted by john_cramer

... You wanted a river to cross, this is it. As far as I know, nobody has prepared a concise set of instructions for actually opening one of these up, fixing it, and putting it back together.

The tools to do this fit your need for the unobtainium, too!

I can't say enough about how much your efforts, especially your careful documentation, will help the MFI community. Thanks for all the GREAT WORK!

[356RS]

Thanks to all of you. I've just begun.
Mike: I have some information on the RSR pumps. Scott Kinder is going to send me the data flow specs for the 2.8 RSR pump. Mike Sutter is going to send me an RSR pump after it has been calibrated and I will then check the calibration and document that data on my flow bench. That should give us lots of information.
John: Thats a very good question and something I have been wondering about. I can document the the fuel delivery rate at (example) every 500 RPM on up to 4000RPM and show the space cam/rack position in mm at each 500RPM mark. That will take some time but would be well worth it.
David: Thank you. I love the challenge and hope to add as much documentation as I can to the MFI community.

[philippeF]

nice job !
here's mine on a #53 cam pump



and a 019 pump at full throttle ...

[jcge]

Might have answered my own question on this....data from the published test sheet



Now, assuming 18.7mm pitch diameter (ref. late PES6KL) on the rack segment and a 6mm bore, a delivery rate of 10.8cc/RWmm/1000strokes equates to about 50° plunger helix angle.....

Similar data across R3, R3Y, R3Z (all use plungers 033/005)



Test validation (or contradictory) data welcome !!!

[356RS]

Thanks John. Might take me a bit to figure it out.

[Bobboloo]

Bravo!!!

Well done!

[356RS]

I'm going to bring my MFI pump dyno to the Emory's Campout next weekend. I'll will have to put the 110 volt motor back in so I can use a generator for the pump motor. Might not do well above 3500 pump RPM but I will still be able to give some good tests for a fun demo. Link below for the Campout:

http://www.partsobsolete.com/

[bergporsche]

Interessting thread, thnx

[jimmcc]

Thanks for documenting the project. Very interesting.

If you have a picture of the top of the graduated cylinder stand where the injectors mount please post it. I'd like to see how you keep the injectors in place during the test.

Thanks

Jim

[356RS]

I used an 1/8 thick steel for the top plate, cut and fitted, and drilled 6 holes, welded nuts on the bottom of the holes for the injectors to screw in.

[jimmcc]

I do love it when a plan comes together nicely.

Beautiful work and thanks.

[RWebb]

Mark - you might do a small 'production' run of the parts - it would be nice for the Pcar community if there were several of these scattered around the US.

Very impressive!

[tadd]

356RS:
Did the info for the RSR pump ever arrive? Gus at Pacifica had told me years ago that he will only do the 001 pump conversions since they give the best adjustment. Have you found that to be the case in your experience or will any old pump do with the proper space cam. Guessing is allowed!

tadd

[356RS]

Gus is right about the early pump for RSR conversions. Main reason is the RSR space cam ( V-94 ) is the narrow style and fits properly in the early governor housing. The later pumps with the wider space cam can be modified for the RSR fuel flow requirements but will not be quite the same as the real RSR unit.

[tadd]

Thanks Mark!

Would that not also include the 005 then? Gus would only do the 001. Care to guess how hard the V-94 cams are to come by?

BTW, I forgot to add the kudos to your triumph. I disassembled my first pump in 2005, then changed jobs, moved, bought a dump at the peak of the housing market, ect, ect, ect. Everything is still neatly in a compartmented box. Maybe once the engine is built... ya right .

Keep up the brilliant work,

tadd