Inside the Kugelfischer / Schaefer Mechanical Fuel Injection Pump
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- čas přidán 16. 11. 2021
- From 1962, the Kugelfischer medium-pressure gasoline port injection pump was used on European performance cars made by the likes of Peugeot, Ford, BMW, Ferrari and Porsche. In the late 60's it was adapted to support turbocharged production cars with mechanical manifold pressure dependent fuelling. Its use continued in motorsport into the 1980s where a computer-controlled version of this simple mechanical pump was helping BMW F1 engines deliver 1350BHP in qualifying trim.
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Brilliant, a thousand thank you for this video
Pretty clever. I was completely unfamiliar with this system being over here in the States.. Although I assume if I was in to older BMWs that may have be different. The delivery of fuel is very similar to an inline diesel injection pump but the metering is more similar to a rotary pump. and the control, and mapping ability is very unique.
Absolutely perfect strip down and explanation. Thanks for uploading this. What an absolute super piece of clever design, especially the cone 'fuel map' clever device.
Very interesting video, and a great explanation! Thank you. 🙂
IM 😎
Hi David, echo all the words of thanks and admiration for the breakdown and explanations you give here. (of which, Im here courtesy of the message you left on Aussie Frogs about the wax -cold-control-enrichener-thingy !! you are re manufacturing... I'll be placing an order for my 504 injection before too long. Once again, thanks and literally any info you put out re these Kugelfischer systems will be appreciated by us lot, r's (liked the injector refresh video you did) mike
very well explained
Thank you for this video, very interesting!
I've been told that the version used on the Peugeot 504 Ti runs on engine vacuum and therefore impossible to add forced induction - do you know if this is true?
Great video. I have a question for you - does the elbow on the bottom for the oil drain tend to feel loose? I am sorting out multiple oil leaks and noticed that the elbow moves slightly and was wet (not sure if oil came from there or elsewhere). Any advice appreciated.
Yes that drain hose is often rather swollen & soft...it's only job is to direct the oil back into the engine sump, so you can replace it with a suitable oil-resistant hose (not water hose). It should not be loose, make sure suitable hose clamps seal it well at both ends... there's only crankcase pressure there, but it can still leak and slowly make a mess.
@@ctc77965o thanks for the quick response David! The hose itself was tight but I did remove it to replace anyhow. However my main concern is that there is a metal elbow that comes out of the kfish housing and 90s, and the hose is attached to that. The metal elbow feels loose in the kfish housing just a bit. I have video, not sure how to post it here. Is that normal? Or is that elbow usually rock solid?
Sorry misunderstood...that metal.outlet pipe should be rock solid.
@@ctc77965o hmmm so I have an issue there. Any idea how to tighten it up, or why it’s loose? It does not spin. My natural gravitation is toward something like RTV or JB weld
@@ctc77965o dug a bit further. Removed the back cover off the kfish and I can see that elbow is held into the cover with a roll pin. I think I’ll clean it well and seal it up on the outside to prevent leakage. Planning to use JB weld. Thanks so much for this video, for your responses, and for my WUR rebuild kit! I did that yesterday before noticing the leak at the bottom.
What pump pressure do you need?
30psi is what's expected...that fuel pressure is what "fills" the pump, assisting the suction of the spring loaded plunger/pistons. I don't think higher fuel pressure makes much difference (fuel is quite incompressible) but very low fuel pressure...or fuel pressure that reduces in hi flow/max power condition will cause misfires.