320 CDI boost pressure?
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320 CDI boost pressure?
I posted this on the W211 forum, but I suppose a European fan might have the answer here too:
Does anybody on here happen to know the boost pressure for the 320 CDI engine? I'm not talking about the 23,000 psi fuel injectors, I'm talking about the air pressure from the turbocharger. One dealer I talked to said, after translating the number from some obscure unit, that it came to 36.2 psi, which sounds awfully high, as he noted. Somebody else told me they thought it was about 7 psi, which sounds low. By comparison, the roughly comparable BMW 3-liter turbodiesel runs about 22.6 psi on a 17.0:1 compression ratio to produce 228 bhp, so the 320 CDI should be in that range, one would think. Any thoughts?
Incidentally, I was originally asking about the inline-6 E320, but I'd love to know the same thing in regard to the new 2007 vee-6 E320 Bluetec.
Does anybody on here happen to know the boost pressure for the 320 CDI engine? I'm not talking about the 23,000 psi fuel injectors, I'm talking about the air pressure from the turbocharger. One dealer I talked to said, after translating the number from some obscure unit, that it came to 36.2 psi, which sounds awfully high, as he noted. Somebody else told me they thought it was about 7 psi, which sounds low. By comparison, the roughly comparable BMW 3-liter turbodiesel runs about 22.6 psi on a 17.0:1 compression ratio to produce 228 bhp, so the 320 CDI should be in that range, one would think. Any thoughts?
Incidentally, I was originally asking about the inline-6 E320, but I'd love to know the same thing in regard to the new 2007 vee-6 E320 Bluetec.
Thread Starter
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Joined: Aug 2006
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Run a boost gauge, you can tee in at the Boost Control module, there is a rubber hose coming off of it. Put a plastic Tee in and run it to a gauge.
It's variable because the turbo blades are electronically adjustable for pitch.
