09 C63 Dyno'd
#1
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09 C63 Dyno'd
I'll post the dyno sheets soon..gotta scan them onto my computer...but it was a dyno dynamics machine..ran 433 stock (I have PP) and with Velos tune it ran 486...they said the open loop is kicking in to late with the tune and a few other things such as detonation with the tune (hopefully velos can fix this) but still some strong pulls..I have a few videos I'll upload in a few hours..
Are the stock #'s about right?
https://i.imgur.com/AhI8YCV.jpg
https://i.imgur.com/Yf6M0mX.jpg
https://i.imgur.com/DRQ0MMc.jpg
https://i.imgur.com/6MPXbja.jpg
https://i.imgur.com/gIVem42.jpg
Are the stock #'s about right?
https://i.imgur.com/AhI8YCV.jpg
https://i.imgur.com/Yf6M0mX.jpg
https://i.imgur.com/DRQ0MMc.jpg
https://i.imgur.com/6MPXbja.jpg
https://i.imgur.com/gIVem42.jpg
Last edited by avery.whss; 08-30-2013 at 10:03 PM.
#2
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So just curious and for clarification: the 09 PP was not a change in engine was it? I thought (and prob wrong so ignore my not knowing) but the 09 PP was LSD, brakes and speed limiter removal. I have the same tune and would be curious to your response from them.
#3
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Do you notice your car makes a weird detonation sound in 2nd-4th when in high RPMs? the dyno place noticed and so did the dyno something about the open loop not kicking in soon enough..you can kinda hear it in the video too, they said that the car should be around 12 in the air:fuel..not 10.
#5
MBWorld Fanatic!
#6
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#7
MBWorld Fanatic!
Your delta before/after seems about right, although it's def reading high, but the increase seems about right
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#13
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#14
In naturally aspirated engines powered by octane, maximum power is frequently reached at AFRs ranging from 12.5 to 13.3:1 or λ of 0.850 to 0.901
10;5:1 is really low
was it detonating?
10;5:1 is really low
was it detonating?
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yeah it was and does...you think it's harmful to the car? or should I go with stock file until it's fixed?.....the guys at the dyno said it should be around 12-13ish so you're right...I sent Velos a e-mail so hopefully it can be fixed.
Last edited by avery.whss; 08-31-2013 at 02:23 AM.
#16
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Yeah it sounds more like a ping..I just wasn't sure how to describe it...it deff is running low...at one point it was like 10ish.
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Please forgive my ignorance when it comes to the dyno graph but as the ratio drops, why does HP continue to climb? If there was a detonation problem wouldn't the hp/tq curve less linear?
#21
higher = leaner
lower = richer
overfueling can leave deposits and fuel in the cylinder
might reignite if it hits a hot exh valve
but overly rich shouldn't increase power should it?
#22
how do they measure the AF?
a probe in the exhaust or the O2 sensor via the OBD port?
wag: the timing is too agressive and the engine knocks causing the overfueling
a probe in the exhaust or the O2 sensor via the OBD port?
wag: the timing is too agressive and the engine knocks causing the overfueling
Last edited by Ingenieur; 08-31-2013 at 12:04 AM.
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#24
wag=wild @$$ed guess
something is going on
you get to 3500 and the AF drops like a rock and goes off the chart at 5500 or so
I would expect it to mirror the oem curve but a ~1 point lower
perhaps the cat is over-saturated and not lighting off properly and the O2 sensor is seeing high O2 and starts fueling
perhaps the software is manipulating the lambda value to trick the ecu into increase the fueling rate
could be a many things but without knowing what the programmer did it is all a wag
I wouldn't run the software until I saw a better AF ratio
something is going on
you get to 3500 and the AF drops like a rock and goes off the chart at 5500 or so
I would expect it to mirror the oem curve but a ~1 point lower
perhaps the cat is over-saturated and not lighting off properly and the O2 sensor is seeing high O2 and starts fueling
perhaps the software is manipulating the lambda value to trick the ecu into increase the fueling rate
could be a many things but without knowing what the programmer did it is all a wag
I wouldn't run the software until I saw a better AF ratio