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C32 AMG, C55 AMG (W203) 2001 - 2007

too lean??

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Old Nov 23, 2010 | 12:15 PM
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c32kompressor's Avatar
c32kompressor
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CLK55 AMG
too lean??
i dynoed stock at 330.2 whp and 327.4wtq, now i have a custom pulley and i cant break 12's! maybe im running to lean? where and how could i get my air fuel ratio checked? and if im running to lean where and how could i fix that? im pretty concerned about this :/
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Old Nov 23, 2010 | 01:00 PM
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Gramma_Benz
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2002 C32, 2012 S550
Originally Posted by c32kompressor
i dynoed stock at 330.2 whp and 327.4wtq, now i have a custom pulley and i cant break 12's! maybe im running to lean? where and how could i get my air fuel ratio checked? and if im running to lean where and how could i fix that? im pretty concerned about this :/
If you're running too lean, you will actually get a CEL showing a lean condition code.

To check your AFR, you will need to get a 02 sensor bung installed in your exhaust, prior to your primary CAT which is a total B**ch. Then get a wideband datalogger such as this:

http://needswings.com/Zeitronix-DashDAQ-Touch-Screen-Display-and-Datalogger-DashDAQ.aspx

You're probably running a little leaner...but nothing I'd worry about considering the size of your pulley.

But you would definitely get a benefit from getting a custom ECU Dyno tune.
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Old Nov 23, 2010 | 01:12 PM
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how did you get up to 330 whp stock?
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Old Nov 23, 2010 | 01:25 PM
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300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
Get it on
a less generous dyno.You would be hard pressed to break 300 h.p. at the wheels
stock.
A much much much less generous dyno
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Old Nov 23, 2010 | 05:48 PM
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1995 gt
prob a dynojet, not a mustang dyno (loaded)
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Old Nov 23, 2010 | 07:55 PM
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C32
What did the car run stock? 12's are not guaranteed with a pulley. You could even have belt slip causing lower boost.
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Old Nov 23, 2010 | 07:59 PM
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CLK55 AMG
The dyno was a dynodynamics. The car is faster than another c32 with the same mods I can guarentee, I don't know what it ran stock. Never raced it stock. I am the third owner, maybe the previous owner did something??
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Old Nov 23, 2010 | 08:52 PM
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03 g35 coupe...........02 c32 Sold
you can run lean and not get a lean code. I had afr in 15-16afrs and still not get a lean code. Just get a dyno with the afr.
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Old Nov 23, 2010 | 11:42 PM
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Originally Posted by TemjinX2
you can run lean and not get a lean code. I had afr in 15-16afrs and still not get a lean code. Just get a dyno with the afr.
My bad, actually, mine was a hidden code, it didn't trigger a CEL. My code reader didn't show it, but my mechanic's reader could.
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