Dyno Results

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Soldato
Joined
29 Dec 2009
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I don't know much about dyno'ing or tuning, is there something wrong with the following? i.e. shouldn't it be smooth etc?

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I would certainly expect it to look smoother than that, but then I guess its possible what youre used to seeing is just a smoothed curve as the overall shape looks ok for a turbo
 
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Most dyno runs are smoothed by the software, there are different increments of smoothing. You'll find all dyno runs look like this before smoothing is applied.
 
Noise like that is expected, it's actually harder than you might think to gauge RPM of an engine or rollers that are accelerating at that rate, depending on the sensor type and the electronics watching it, you may be counting relatively few samples.

The RPM on your dashboard is usually smoothed too, won't really track reality in high dv/dt situations but quite ok as you close in on the limiter in the higher gears.
 
You sure that's a dyno plot?

That looks to me like it could be a "power graph" generated by ECU data via software.
 
HummuH1 said:
You sure that's a dyno plot?

That looks to me like it could be a "power graph" generated by ECU data via software.
Click to expand...

It does look to be ECU generated -> looks like Ecutek (Formally deltadash)

http://www.ecutek.com/Products/Features/Subaru-Diagnostics/On-Road-Dyno-Testing

ecutek said:
DDRD measures engine speed reported by the ECU, many times per second. Based on this, and additional data about the car, such as tyre, gearbox, drag and weight, DDRD can calculate many statistics about the vehicle's performance, based on a simple full throttle in gear test of the engine on the road surface of choice.
Click to expand...
 
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