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#1
08-23-2006, 10:50 AM
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Two 603 questions
Since I'm more familiar with the 617 I'm still edumacating myself on "603 diesel 101."
1) what was boost pressure on the cars from the factory? 2) whats a good safe, but high level to set it at now without having a pyrometer?
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 1980 500SE/AMG Euro 1981 500SEL Euro 1982 380SEL 1983 300TD 1983 500SEC/AMG Euro 1984 500SEC 1984 300TD Euro 1986 190E 2.3-16 1986 190E 2.3 1987 300D 1997 C36 AMG 2003 C320T 4matic past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350 
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#2
08-23-2006, 10:58 AM
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Mine is 13.5psi @ full load. Seems like a good number. I think they're safe from 10-14psi. I haven't adjusted mine ever, it's the KKK turbo if it matters.
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I'm not a doctor, but I'll have a look.  '85 300SD 245k '87 300SDL 251k '90 300SEL 326k Six others from BMW, GM, and Ford. Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]
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#3
08-23-2006, 11:09 AM
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Quote:
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91 350SD 14 F150 Eco 19 Fusion Hybrid 11 GT500
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#5
08-23-2006, 02:31 PM
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Sixto is correct. Spec is 0.85-0.95 bar. Most end up being 12.5psi of everything is working correctly. You will NOT get any more power by jacking up the boost beyond 12.5psi, so there's no need to worry about EGT's. More power comes from increasing fuel delivery on the IP. I've done this on my car (with a pyrometer) and yup, there's a definite power gain with the extra fuel... and I'm still at stock boost level. I've tested up to 18psi with zero power gain. More air with no fuel does nothing for power.
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#6
08-23-2006, 02:32 PM
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right on, i discovered that awhile back on my 617. Was playing with a mbc and boost shot up to 21psi, but no power increase. it had a severe lack of fuel issue but has since been rectified
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1980 500SE/AMG Euro 1981 500SEL Euro 1982 380SEL 1983 300TD 1983 500SEC/AMG Euro 1984 500SEC 1984 300TD Euro 1986 190E 2.3-16 1986 190E 2.3 1987 300D 1997 C36 AMG 2003 C320T 4matic past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350
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#7
08-23-2006, 03:04 PM
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I went from 8psi to 12psi on my SD and noticed it pulls down the freeway FAR better.
__________________
I'm not a doctor, but I'll have a look. '85 300SD 245k '87 300SDL 251k '90 300SEL 326k Six others from BMW, GM, and Ford. Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]
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#8
08-23-2006, 03:07 PM
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Well yes, if your current boost is below spec (like, 8psi) there can definitely be a power gain if you increase boost to spec (12psi) because the ALDA will add fuel to a certain point. The power gain wasn't from the air, but from the extra air + fuel. But, going beyond spec doesn't get you and power, because the ALDA is still limited by the internal full-load fuel delivery stop.
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#9
08-23-2006, 05:21 PM
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Mine is currently somewhere around 11psi... alda is still unmolested too.
__________________
1980 500SE/AMG Euro 1981 500SEL Euro 1982 380SEL 1983 300TD 1983 500SEC/AMG Euro 1984 500SEC 1984 300TD Euro 1986 190E 2.3-16 1986 190E 2.3 1987 300D 1997 C36 AMG 2003 C320T 4matic past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350
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#10
08-23-2006, 05:25 PM
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Tweaking the ALDA helps quite a bit, I made a big thread about it.
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I'm not a doctor, but I'll have a look. '85 300SD 245k '87 300SDL 251k '90 300SEL 326k Six others from BMW, GM, and Ford. Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]
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