Engine/Transmission (1998.5 - 2002) What fuel pressure - PSI

[hammersley]

does the VP 44 run on my 01????? How much lower is it than the new common rail?

 

[lmills]

Don't quote me on this, but I believe I heard 20,000 psi on the vp44 and 22,000 on the new common rail pump.

 

[hammersley]

This is serious to know - as it affects the

filter medium we need for our fuel filter - I have a great tech article regarding this but I need to know the fuel pressure we're talkimng about - does anybody know these pressures?

 

[snowracer69]

Don't quote me on this either, but I was under the impression that that VP44 runs about 20k psi whereas the new common rail is pushing 50k psi.



Josh

 

[lmills]

OK here is the story straight from issue 40 of the tdr magazine:



page 35; "the electronic system directly cotrols the bosch vp44 fuel pump, which has its own electronic module. The pump is a radial piston, distributor-style unit that is used to deliver fuel at high pressure to the six bosch pencil-type injectors. Maximum injection pressure is approximately 20,000 psi. "



page 37; "As mentioned, the biggest change to the engine is the use of the Bosch HPCR fuel system. The system has a rail pressure of 23,200 psi (1600 bar) on the high output engine. "



So you can figure the pressure is slightly lower on the standard output engines