Update request
 

What is the verdict?

That's a nice work Funola. I like it.

I made some design changes to it and MTUpower has it now in his 300TD wagon. No problems so far. I have to make him a banjo pressure gauge adapter so he can change and see fuel pressure.

I have to make a few more. Been busy with other things.

What
 

Is life getting in the way. :D

I understand how easy it is to get buried in projects.. :eek:

I pretty much agree with your comments.

But, what I am thinking is that the Performance guys would be interested in upping the pressure because they are trying to max out the Injected Fuel quaintly.

So with more Fuel injected there is less Fuel left inside of the Element after Injection and that means more fuel has to pass through the fixed size feed hole in the Element; but, there is no extra time to do that.

A higher pressure will move a higher Fuel Volume through the feed hole given the same amount of time to do so.

If you are gonna play with your fuel pressure relief valve, you really should have a way to measure fuel pressure.

I bought 100 ft of nylon tubing and 10 sets of fittings to make the pressure measuring kit (pic below). The banjo bolt is tapped with a 1/8 tube quick disconnect fitting. It replaces the banjo bolt at the IP going to the fuel filter. Comes with 7 ft of nylon tubing, plenty long to run into passenger cabin and a 1/8 female NPT fitting to the gauge (not included). You supply the gauge of your choice. The gauge must be 1/8 male NPT to mate up to the fitting. It should be glycerine filled 30 psi unless you want to go higher.
I have 4 kits at the moment and need more banjo bolts to make more.

Please PM me if you want one.

http://i31.photobucket.com/albums/c3...a/DSC00193.jpg

Yes! Yes yes yes yes yes!
 

Funola,


Count me in. I very, very much would love to have this in hand.

Bottom line, it's assistance like this that will keep our old Mercedes on the road. One of the things that make owning a 1966 Checker Cab easier, is a network of other enthusiasts who stock up on all the Unobtanium, or decide to make new parts to replace those that have fallen out of production.

For example, when WHunter posted that he had bought up the last remaining handful of springs, I sent PeachParts an email asking if the spring for the 617 IP was still available - I got a reply that, nope, they're all gone. What this means is that for now, I'm stuck having to stretch an already worn spring (*IF* my IP has the non-factory sealed part).

So - adjustability? I can dial in the appropriate pressure myself? Or better yet, have it pre-set for me so it's a quick replacement without tuning?

Can I fork over my dough fast enough?

Diesels may be rugged, but their one bugaboo is fuel delivery. Any kinks in volume or pressure, and all sorts of fun weirdness start. Knowing that this is a weak point with the Bosch system means all the more that I'd like to have a fix, and a permanent one at that. Everything with fuel should be to Mercedes Spec. If it's not, you're opening a pandora's box of weird.

James Smith
1982 300SD / 371,000
mohawkjames@gmail.com

I like your ideas and I've been toying with something similar myself for adding an electric fuel pump.

I will say however, DO NOT run fuel lines into the cabin! You MUST use an isolator.

No! Bad! :whip:

So, when the hose is disconnected the QD shuts off flow?

I am just curious as I would not always want to have the gauge hooked up.

Yeah I agree with you. This is temporary instrumentation and is not meant to be a permanent install. That said I have mine in the cabin for about 3 months now without a problem. At some point I will remove it once I have the fuel pressure dialed in. I even tested it in by removing the gauge thus creating a leak while at idle. Only a little bit of fuel squirts out due to the small i.d. of the 1/8 line, not bad at all. Probably a lot less than if the oil pressure gauge line sprung a leak.

No it does not! Once you have your fuel pressure dialed in, you remove it and put the old banjo bolt back.

Yeah, you have it rigged nicely and it's not much of a concern. It's just one of those unsafe practices that really shouldn't be left connected forever. :)

On second thought, I will include a plug so that the tapped banjo bolt does not have to be removed. To disconnect the gauge, you remove the quick disconnect fitting and install a plug in its place. If you want to take a fuel presure reading again, you remove the plug and install the QD fitting. Is that better?

In addition to being able to see the pressure one has..
I think you need to make this device to where it can be adjusted from IN the car While driving..

That seems like a way the differences.. IF ANY.. would show up...

That should not take much time to invent ... you have plenty of spare time..
LOL

That would be cool but it would raise the price considerably and no one would want it. ;)