12-20-2017, 02:00 PM | #133 |
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Thanks to those posting full graph of the Dyno to show the power curve \ power band as peak numbers means nothing if its only a slight peak
New Thread coming soon Dragy times 0-60, 1/4 mile, 1/2 mile, 60-130mph
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12-20-2017, 02:21 PM | #134 |
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12-20-2017, 02:39 PM | #135 |
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12-20-2017, 04:35 PM | #136 | |
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Yes .... still debating in getting an intercooler we'll see what happens in the future
Quote:
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12-21-2017, 02:57 PM | #137 |
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Dyno Querry
Hello All
New to the forums, New to the M2 have had it for around 2 months now. I have had the car on a dyno run with an odd anomaly. At around 5700RPM I get a sudden dip which you can view in the jpg attached to this post. It happened on all 3 runs. Now is this normal ? has anyone else come across it ? Thanks |
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12-21-2017, 03:34 PM | #138 | |
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Quote:
what fuel ?
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12-21-2017, 05:05 PM | #140 | |
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The drop is normal 6.5-7
/// Have you done the break in service yet ? Maybe that's why it's dropping at 5700. Not sure don't quote me on that Quote:
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12-21-2017, 05:11 PM | #141 |
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12-21-2017, 06:10 PM | #142 |
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Could also be Dyno Operator
Did you turn off Traction Control off completely? What gear?
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12-21-2017, 11:56 PM | #144 |
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12-22-2017, 04:20 AM | #145 |
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12-22-2017, 12:22 PM | #146 |
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Hi all, here is the stock baseline Dyno on my wifes 2018 M2. 8 runs, all quite consistent. This was run 6. The adaptation factor found its limit on this run
Has full Active Autowerke race exhaust(sounds freaking unreal!!) on now and doing another set of runs this weekend. Break in service next week and then the DME is coming out! |
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12-22-2017, 11:51 PM | #147 | |
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Something is not right with the dyno readout .....
Torque and Horsepower should always cross at 5,252 RPM. Much like user VCP Dyno he posted here Torque = (Horsepower x 5,252) / RPM Horsepower = (Torque x RPM) / 5,252 It is a mathematical constant derived from the fact that a 1 foot circle has a circumference of 6.2832 feet. Dividing 33,000(1 horsepower = 33,000 lb-ft/min) by 6.2832 gives you 5,252, which simplifies the equation and resolves the units. This constant is the reason that horsepower and torque graphs always cross paths at 5,252 rpm. For the Info box in the lower right corner, just to break it down a bit BP: Barometric Pressure (982.2) RH: Relative Humidity (60%) AT: Ambient Temp (13°C) IT: Intake Temp (14°C) RR: Ramp Rate (150) So a ramp rate of 150 on a dyno dynamics dyno allows the wheels to accelerate at 15kph per second in a linear rate from start to finish. This can be manually changed when the dyno dynamics in not in shootout mode. This run was in shootout and I think its preset in this mode. TN: Total Inertia. It's a calibration figure based on the dyno and shootout mode the run was done in. So should be constant for same dyno + same shootout mode. Certainly has a reading on your power figure. Total Inertia is based on the model of dyno (and it's factory calibration), + the guesstimated inertia produced by vehicles fitting the chosen mode. I say get the RPM being off fixed first before getting hung up on the dyno graph. That being said I have seen something kinda like this with to long of a dyno run (low ramp rate) with limited air flow on the intercooler, the DME pulling power because of air temps being high. Good Luck (next line) date time CK: Check number. Simply a way for DynoDynamics to check to see if any of teh numbers on a chart have been fudged with (eg. a photochop). Not anything to do with calibrations, so they'll always be different. CF: Mode the dyno is run in (SHOOT = shootout, # = cylinders and F = Forced Induction), picking the wrong one here is an easy way to generate inflated figures TyrePres: Tyre Pressure (PSI) Gear: self explanatory. Hand entered by the operator, but has no bearing on the result itself, the run should be done with a 1:1 ratio gear selected I say get the RPM issue fixed first before getting hung up on it. With saying that i've seen something like this before with to long of a dyno runs (low ramp rate) and limited air flow across the intercooler, causing the DME to pull power from overly high intake air temps. Quote:
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