 Re: Engine data rpm? |
| Still waiting Justin comments here? |
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| Re: Engine data rpm? |
| Apparently Kawasaki doesn't feel the stock tachometer is accurate enough even at idle speed to synch throttle bodies. There may be nothing about all this, but still interesting to me. |
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| Re: Engine data rpm? |
| As much as I hate to say this, I am going to guess that the Power Commander is accurate and the bikes tach cluster and Woolich are off by 100-150RPMs. Not fault of the Woolich it just gets the same signal as the bikes gauge gets.
Again just guessing, but the Woolich Engine Data draws from the same data stream out of the ECU as the bikes gauge cluster, thus the reason they both read the same.
If you look in the Kawasaki service manual the procedure for synchronizing the throttle bodies states not to rely on the bikes tach, but instead you must hook up a "highly" accurate tachometer to one of the stick coils. That leads me to believe the bikes tach has some measureable error.
So lets assume the Woolich data is off by 100-150 RPMs, how much does that matter at mid range and high RPMs where the fuel cells are 500 and 1000 RPM increments? I don't know. I am asking.
Since my target AFR is the same for all cells, as long as they are all logged the same AFR, wouldn't seem to matter how I got there, as long as I got there.
If you run a real varying target Map, then it could cause some errors.
I don't know any of this as fact other than what the Kawi manual stated about using an highly accurate tach versus the bikes gauges cluster for synching throttle bodies, in other words, just speculation.
My guess is the Dynojet unit calculates off the injector pulse and that is more accurate. But I surely could be wrong.
Interesting video, thanks for posting it. |
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| Re: Engine data rpm? |
Here is our test about rpm readings. Which one is real rpm? Engine data shows almost same as bike and Powercommader lower. Why engine data shows different rpm than Powercommander? Pause vid at any moment, helps you see the difference.
https://youtu.be/LzXS53QmYF0
Interesting find.
If the rpm is read from the same source as the (ECU) output to the instrument cluster (rpm gauge) this is like speed(speedo) usually some percent off the "real" value. This is always tested by serious testers/bike magazines (like MotorRad).
If it is read "unfiltered" from the SDS/ECU-pin (ignition or speed sensor) it should be "dead on" depending on wheel size/wear (speedo).
Justin will know the answer 
If I remember correctly the PC have no other connections to the ECU(pins) other than to the TPS wire and injector connectors.
And the injectors should be "dead on" depending on how the actual rpm is calculated by the PC device. |
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| Engine data rpm? |
| Here is our test about rpm readings. Which one is real rpm? Engine data shows almost same as bike and Powercommader lower. Why engine data shows different rpm than Powercommander? Pause vid at any moment, helps you see the difference.
https://youtu.be/LzXS53QmYF0 |
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