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!

[JamesM]

Hey, looky what I found....


https://www.injector.com/cart/pc/Adjustable...No-0610-p48.htm

I would deal with/verify your pump situation first but if for some reason you still cant get your stock regulator to 43 psi this looks like it might be a fit providing the picture is an actual representation.

Edit:
Looks to be the same as an MSD 2222 (and if you look real close at the picture it says made in germany and had a bosch part number, not sure what that is about)

https://www.summitracing.com/parts/msd-2222

Also the MSD-2220 (same thing without the boost port)
https://www.summitracing.com/parts/msd-2220

Both are listed as 36-45 PSI


anyways, you have options. Thinking that should be enough info to take care of all the issues (IMG:style_emoticons/default/biggrin.gif)

[JamesM]

Found another picture of the MSD 2222 where you can see the full bosch part number...

you will never guess what it is...

(IMG:style_emoticons/default/lol-2.gif) (IMG:style_emoticons/default/laugh.gif) (IMG:style_emoticons/default/lol2.gif) (IMG:style_emoticons/default/lol3.gif)

[GregAmy]

Found another picture of the MSD 2222 where you can see the full bosch part number...

you will never guess what it is...

(IMG:style_emoticons/default/lol-2.gif) (IMG:style_emoticons/default/laugh.gif) (IMG:style_emoticons/default/lol2.gif) (IMG:style_emoticons/default/lol3.gif)

Wait, missed this...D-Jet part? Not the one with the boost port...?

[JamesM]

Found another picture of the MSD 2222 where you can see the full bosch part number...

you will never guess what it is...

(IMG:style_emoticons/default/lol-2.gif) (IMG:style_emoticons/default/laugh.gif) (IMG:style_emoticons/default/lol2.gif) (IMG:style_emoticons/default/lol3.gif)

Wait, missed this...D-Jet part? Not the one with the boost port...?

Both the one with the boost port and the one without have the same Bosch part number on the body, at least in the pictures I was seeing. Only difference between the two appears to be the adjuster screw. The part number in question though shows it to be a VW/914 d-jet pressure regulator, so if the MSD published specs are believed it leads me to believe that the stock d-jet regular should go to 42PSI, and given I have seen one go higher than that in the past I have to think its accurate. Still has me curious why you are only seeing ~35.

Also, given it looks like the only thing needed to add boost reference to these things is to port the adjustment screw to add pressure to the back of the diaphram, im wondering if its not also possible to affect the max pressure by shimming the adjustment screw??? Ill have to take one apart and examine it a little closer.

[GregAmy]

Still has me curious why you are only seeing ~35.

- Pump can't go that high (capability or internal bypass);
- Regulator can't actually do it;
- Bad regulator.

I've got some dyno time scheduled for the 14th. I think I'll drop the coin with Summit and buy one. Edit: Items appear to be no longer available.

...wondering if its not also possible to affect the max pressure by shimming the adjustment screw??? Ill have to take one apart and examine it a little closer.

Yeah, that would have to happen inside; I ran out of threads then I screwed it all the way in.