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]

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

@GregAmy

What fuel pump are you running?

Literally just now learned this, but it looks like the factory pumps have an over pressure relief system built in (that is apparently what that annoying 3rd port on the 3 port pumps is for) designed to not allow pressure over 3 bar, and guessing on an older pump that number might even be slightly lower due to wear. Just guessing here, but if you are running a stock pump this could explain the max pressure you are seeing.

Per https://oldtimer.tips/index.php/en/d-jetronic/81-fuelpump
It looks like the bosch universal replacement (0 580 464 999)is rated to 4 bar

https://www.amazon.com/MERCEDES-Admiral-Bos...5/dp/B00BHGUKQU

Though amazon is great and showed me this much cheaper ($35) replacement that looks physically identical and rated at 35 gal/hr @ 45 psi Max pressure - 8.5bar (125 psi) - provided you are not afraid of cheap parts.

https://www.amazon.com/Universal-Replacemen...EWG9SKBVNB4MCXX





I personally have been running this pump on one of mine with the stock regulator for 10+ years

https://www.summitracing.com/parts/msd-2225

Its probably a little overkill (good to ~500hp) as well as being on the loud side, but it gets the job done. only mentioning it as i dont have personal experience with either of the other 2 to vouch for them yet.



Im curious to know what you find out here.