D-Jet Fuel Pressure Regulator, How high should it go? Options

[GregAmy]

What should be the maximum capability of the stock D-Jet pressure regulator? Mine only goes to 36.

If that's normal, is there another similar-format regulator that can go up to around 45psi?

Background: Microsquirt project. Was hoping to use the stock regulator, but now need something that I can easily mount in the same location, if possible. Injectors I'm using are rated at 43.5psi.

Discuss!

[JeffBowlsby]

Hi Norbert, thank you for the Bosch list its very helpful. I can see that that my chart above needs updating, I did not have that Bosch list available back then. I had used other web sources listed in the references, many were injector rebuilder shops.

I developed my chart maybe 15 years(?) ago, based on the references available at the time, which are indicated on the chart. It took quit a bit of time as I recall. Looking those up now, I see many of those sites have gone away. A couple are interesting though. The Weiss chart was a reference for me back then, but it currently lists the 0 280 150 019 injector at 320.6 cc/min, and the Witchunter chart lists it as 406 cc/min at 3 BAR. I wonder why they changed it?

One would think rebuilders would use accurate info.

I did not see an indication of what the test pressure was for the Bosch chart values. Do you know?

[nordfisch]

... The Weiss chart was a reference for me back then, but it currently lists the 0 280 150 019 injector at 320.6 cc/min, and the Witchunter chart lists it as 406 cc/min at 3 BAR. I wonder why they changed it?

One would think rebuilders would use accurate info.

I did not see an indication of what the test pressure was for the Bosch chart values. Do you know?

Hi Jeff,
I don't know the reason why some guys publish strange data...
maybe they measured 'blue' injectors instead of 'green' ones.
Late 0 280 150 036 injectors (type 'blue') do have a real strange color and look more light green than blue.y
406 cc/min would fit a blue injector at 3 Bar... or using another fluid or both.

This is only a suggestion.
But I can definitely say incorrect values are published in Germany, too.

Be aware Bosch produced only three types of D-Jetronic-injectors (265 ccm, 318 ccm, 380 ccm) (another type with higher flow rate was developed, but never produced).

The D-Jetronic-injectors are numbered from 0280150001 to 0280150045. All injectors outside of this range are no D-Jetronic-injectors.

So are the injectors of the 1.8 L-Jetronic not compatible with the D-Jetronic.

Sorry, I can't tell you which medium Bosch used to test the injectors now.
I'll try to get the information.

'ASNU' - rebuilders normally don't measure the flow rate but check the spray pattern and the difference between the injectors of the same type they test together only. Bosch testing procedure for injectors doesn't include flow rate measuring, too.

Regards
Norbert