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      05-06-2014, 02:30 PM   #1
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Post BMS +2.5 PSI Dyno result

Still don't like the torque line.
Here is Dyno +2.5 PSI over stock


And +3 PSI over stock
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      05-06-2014, 02:49 PM   #2
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And a video of course

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      05-06-2014, 06:46 PM   #3
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Mr Karim,

What fuel were you running? Straight 93 or a mix? Thanks
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      05-06-2014, 06:47 PM   #4
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I thought you wrapped your car brilliant white??
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      05-06-2014, 07:00 PM   #5
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Quote:
Originally Posted by LSM View Post
Mr Karim,

What fuel were you running? Straight 93 or a mix? Thanks
94 octane + NOS octane booster. Unwrapped the car a few weeks ago.
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      05-06-2014, 07:47 PM   #6
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Those are interesting results you know at 2.25 and average about 94 octane I hit 590rwhp and 545W Lb/FT and I dont have any mods at all..I wonder if that exhuast is robbing your torque??

I need to retest with new settings
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      05-07-2014, 02:47 PM   #7
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Great numbers!

Thanks for sharing Mr.Karim!

LSM - We need to do a side by side comparison & dyno run at EAS!
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      05-07-2014, 04:39 PM   #8
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Quote:
Originally Posted by mr-karim
Quote:
Originally Posted by LSM View Post
Mr Karim,

What fuel were you running? Straight 93 or a mix? Thanks
94 octane + NOS octane booster. Unwrapped the car a few weeks ago.
Interesting , you are still running too lean on several of those runs and that's why you're torque is low . An AFR of 16 plus, is really unsafe at redline if those are accurate. Do you have any stored error codes in the ECU ? I'd get you're car checked out , and until then go back to the standard 2.25 setting on the old firmware .
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      05-07-2014, 05:49 PM   #9
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Quote:
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Interesting , you are still running too lean on several of those runs and that's why you're torque is low . An AFR of 16 plus, is really unsafe at redline if those are accurate. Do you have any stored error codes in the ECU ? I'd get you're car checked out , and until then go back to the standard 2.25 setting on the old firmware .
Standard is 2.5 for s63tu engine with 93 octane +
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      05-08-2014, 02:05 AM   #10
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Quote:
Originally Posted by mr-karim
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Originally Posted by gmd2003 View Post
Interesting , you are still running too lean on several of those runs and that's why you're torque is low . An AFR of 16 plus, is really unsafe at redline if those are accurate. Do you have any stored error codes in the ECU ? I'd get you're car checked out , and until then go back to the standard 2.25 setting on the old firmware .
Standard is 2.5 for s63tu engine with 93 octane +
No the default is 2.25 for pump gas on the old firmware . But that doesn't change the fact that you're AFR's are off really bad , again if they are accurate . I would scan you're car for error codes and make sure everything else is functioning well , bc as you said you're power curves are off pretty bad in several of the runs .
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      05-08-2014, 11:54 AM   #11
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Great numbers!

Thanks for sharing Mr.Karim!

LSM - We need to do a side by side comparison & dyno run at EAS!

Joey,

Sounds good, when you avail?
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      05-12-2014, 02:41 PM   #12
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Hi, coming from a tuning background, you are running really lean there , turbo charged cars should be running between 11-13 on the AFR on full boost, depending on the timing. If you ever hit 14-16 on a Jap car , it would have gone pop by now, just shows you how well engineered these engines and ECU are. This ECU must be running knock detection and pulling power back tremendously. I would suspect its your de-cats that has caused this, as the exhaust is flowing without any restrictions.

Have you dyno'd the car with the cats on before ? so you can compare the AFR, your car looks great . Get it seen to before you do anymore crazy runs .
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      05-12-2014, 05:44 PM   #13
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Quote:
Originally Posted by michel lane View Post
Hi, coming from a tuning background, you are running really lean there , turbo charged cars should be running between 11-13 on the AFR on full boost, depending on the timing. If you ever hit 14-16 on a Jap car , it would have gone pop by now, just shows you how well engineered these engines and ECU are. This ECU must be running knock detection and pulling power back tremendously. I would suspect its your de-cats that has caused this, as the exhaust is flowing without any restrictions.

Have you dyno'd the car with the cats on before ? so you can compare the AFR, your car looks great . Get it seen to before you do anymore crazy runs .
Hm, do you think the problem is in downpipes?
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      05-12-2014, 06:34 PM   #14
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From the tuning world that I have come from, reducing the restriction in an exhaust system and allowing the engine to breath better always requires additional tuning to compensate for this .

I am not sure about how the BMW M6 ecu handles this, it may have parameters to compensate within a certain range , but looking at you dyno graph it seems that the ecu is not running O2 feedback . This is were it self tunes itself if the values of the AFR exceeds a certain range. This is a great idea but relies on one aspect , the lambda sensor is accurate. A lot of GM motor cars have this feature as they have 2 banks of sensors.

Then again , seeing the AFR reaching such a high value and the ecu reducing the power , says one thing about these cars , the ecu is pretty good . I bet it is also reducing boost . It's a shame you haven't got boost reading on the dyno graph aswell.

On the other hand , it could be a faulty wideband sensor on the dyno , giving you wrong readings . Get it dyno'd again and but put the piggy back to stock setting then slowly increase the boost on each of the run . Make sure they log the boost , AFR, torque ,hp on the same graph . But in the mean time , knock the boost to stock to be safe .

I am hoping to stick mine on the dyno this weekend to see what the AFR is like on boost, don't get to involved in chasing numbers on a dyno, tuning is all about power delivery and drive ability, pointless having all the power up top when there is nothing mid range .
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