C32 AMG, C55 AMG (W203) 2001 - 2007

Star Diagnostics Machine..What specific perf mods can be made by this machine?

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Old Sep 9, 2009 | 01:17 PM
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Star Diagnostics Machine..What specific perf mods can be made by this machine?

What specific performance mods can be made with a Star Diagnostic machine??
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Old Sep 9, 2009 | 01:29 PM
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Originally Posted by benzluvr1
What specific performance mods can be made with a Star Diagnostic machine??
nada my friend. The only thing you can really do is the fan mod. Everything else is diagnostic info and testing.
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Old Sep 9, 2009 | 04:16 PM
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Well I was told by an operator that there is a stage 3 octane mod that helps a little...Set at 86 from factory and they change it to 93 with the star..Not sure exactly of the theory behind it but it supposedly helps a little in performance...Was just curious if we had any star experts in here among the countless others...
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Old Sep 9, 2009 | 04:53 PM
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yes, there are few stages to choose from...
i haven't played with min yet tho...
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Old Sep 9, 2009 | 06:07 PM
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Originally Posted by benzluvr1
Well I was told by an operator that there is a stage 3 octane mod that helps a little...Set at 86 from factory and they change it to 93 with the star..Not sure exactly of the theory behind it but it supposedly helps a little in performance..
I assume it'd apply a slightly more aggressive timing curve to coincide with the higher octane.

Bill
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Old Sep 9, 2009 | 06:14 PM
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Originally Posted by billapex
I assume it'd apply a slightly more aggressive timing curve to coincide with the higher octane.

Bill
By default the octane in US market cars is set to 91. The change to 93 retards the timing a bit.
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Old Sep 9, 2009 | 09:46 PM
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^by default, it is actually set at 89.
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Old Sep 9, 2009 | 10:38 PM
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Originally Posted by Lenin
By default the octane in US market cars is set to 91. The change to 93 retards the timing a bit.
the higher the octane number will allow for more advanced, not retarded timing.
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Old Sep 10, 2009 | 04:24 AM
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Originally Posted by mkonei
the higher the octane number will allow for more advanced, not retarded timing.
What's what I meant to say. But I'm still under the impression that the default is 91 octane.I did this so long ago that I forgot already. If I find it, I'll post screen prints from the STAR system for this mod.
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Old Sep 10, 2009 | 07:26 AM
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Originally Posted by mkonei
the higher the octane number will allow for more advanced, not retarded timing.
thanks for clearing that up..thats what i thought too.
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Old Nov 17, 2009 | 03:11 AM
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Just did this "mod" and have set it to 93 Octane. Will report back if there is any difference...
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Old Nov 17, 2009 | 08:36 AM
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Originally Posted by ML500K
Just did this "mod" and have set it to 93 Octane. Will report back if there is any difference...
If you already have a tune....this mod will do zip...FYI
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Old Nov 17, 2009 | 09:03 AM
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man i wanna buy one of these machines :-(
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Old Nov 17, 2009 | 11:39 AM
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There are 4 stage in the star diag : base, 89, 91 and 93 by default it is base. i made it 93 in my car and the car leaned at upper rpm.
Also there is the fuel quantity adjustment: base, leaned, slightly enriched and enrich. i made it enrich the afr at low rpm was slightly increased but it is still leaned at upper rpm.
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Old Nov 17, 2009 | 11:57 AM
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so i returned everything to base, when there is a tune in the car specially Jerry's tune no advantage to change those things.
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Old Nov 19, 2009 | 02:07 AM
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cool, i'll just return it back to base
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Old Nov 19, 2009 | 02:13 AM
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Originally Posted by Robert AMG
There are 4 stage in the star diag : base, 89, 91 and 93 by default it is base. i made it 93 in my car and the car leaned at upper rpm.
Also there is the fuel quantity adjustment: base, leaned, slightly enriched and enrich. i made it enrich the afr at low rpm was slightly increased but it is still leaned at upper rpm.
So base is 89?
Did you have a custom or mail in tune; since you're also OOC ( out of country) I'm also assuming u had an a/f gauge setup, was it in the tailpipe or through a bung in the headers.

cheers.
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Old Nov 19, 2009 | 02:36 AM
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Originally Posted by Robert AMG
There are 4 stage in the star diag : base, 89, 91 and 93 by default it is base. i made it 93 in my car and the car leaned at upper rpm.
Also there is the fuel quantity adjustment: base, leaned, slightly enriched and enrich. i made it enrich the afr at low rpm was slightly increased but it is still leaned at upper rpm.
I got my mechanic to return everything to base for me.. I've noticed a decrease in power but better fuel consumption (the reason for taking things back to base).

Should I put it up to 93 octane? I'm putting in 98 Octane fuel in it(highest available in Australia) so it's getting the high octane fuel but from what I can gather it isn't set to manage it properly?
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Old Nov 19, 2009 | 03:09 AM
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Originally Posted by Beaker
I got my mechanic to return everything to base for me.. I've noticed a decrease in power but better fuel consumption (the reason for taking things back to base).

Should I put it up to 93 octane? I'm putting in 98 Octane fuel in it(highest available in Australia) so it's getting the high octane fuel but from what I can gather it isn't set to manage it properly?
your 98 octane in australia is not equal to 98 octane in the US. it is equal to our 93 octane.
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Old Nov 19, 2009 | 06:05 AM
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Originally Posted by jturkel
your 98 octane in australia is not equal to 98 octane in the US. it is equal to our 93 octane.
I thought it was something like that, thanks for clearing that up. I'm quite sure it's on 93 as I told the mechanic I wouldn't ever put anything less than 98 in the car so I think it's on the 93 setting, maybe it was when everything else was set back to base I lost a bit of power.
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Old Nov 19, 2009 | 09:56 AM
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our highest is also 98 which i think equates to 93...
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