606 pop pressures - PeachParts Mercedes-Benz Forum

MB140300SD · #1 10-09-2022, 01:50 PM

I am installing new firad nozzles in a 606 and spec is 1950psi or there about. First injector with the stock shim is popping right around 2100. Is this too high? I usually try to get them right at about 2k figuring they will settle in after a few miles. Just not sure if this is too high. I am probably going to swap some shims around to see if I can get it down. In my experience after swapping nozzles the pressure is a little bit low and I have to add a shim. If that is too high, I may have to come back to this project after a get some different shims. All the ones I have are thin and intended to be added to the existing shim to bring the pressure up.

Diesel911 · #2 10-09-2022, 09:57 PM

Quote:

Originally Posted by MB140300SD

I am installing new firad nozzles in a 606 and spec is 1950psi or there about. First injector with the stock shim is popping right around 2100. Is this too high? I usually try to get them right at about 2k figuring they will settle in after a few miles. Just not sure if this is too high. I am probably going to swap some shims around to see if I can get it down. In my experience after swapping nozzles the pressure is a little bit low and I have to add a shim. If that is too high, I may have to come back to this project after a get some different shims. All the ones I have are thin and intended to be added to the existing shim to bring the pressure up.

All of the injectors have to be within a certain pop/opening pressure range, so they are balanced. I don't remember the rage so someone else will have to comment on that.