Virtual dyno problem

[killerbee]

Hi
Can someone help me with virtual dyno , I've tried few times to make dynorun but it gives me odd results , there is huge powerloss at 5500-6000 rpm every time , but on real dyno there is not such thing , what can be the problem . I can send logfile and emu file on mail , just send me mail on private msg or here

[eugen_troll]

I have a similar problem.

[killerbee]

It is not such similar , the problem on your dyno can be missfire due rich running

[eugen_troll]

In acceleration i feel no missfire or something similar.

[killerbee]

Missfire and always be felt , maybe it be heard from the back of the car ... maybe it is not missfire ... in my case i have 50-60% loss of power but the car run great :
http://youtu.be/jU51ktFYvr8?list=UUfTxe ... PFxrp3TMBg

[eugen_troll]

Same Log but with Power filter of 11.

[killerbee]

It does not help me still half power on 5700 rpm

[Jadzwin]

Eugen's dyno graph is ok. You need to take into consideration that it is power on the wheels so all drivetrain friction lower the result (especialy with RPM increase).


Killerbe's graph looks not so good.
You should put here the log that you used to generate dyno graph.
Do you feel that the power decreases in high rpm band ?

[Karel]

Missfire and always be felt , maybe it be heard from the back of the car ... maybe it is not missfire ... in my case i have 50-60% loss of power but the car run great :
http://youtu.be/jU51ktFYvr8?list=UUfTxe ... PFxrp3TMBg

Clutch or Wheel slip ?

Did you watched your speed signal in log ?

I am using virtual DYNO just for comparation between pulls by changing Boost, Cam angle, AFR, IGN etc.... so i am not expecting real numbers, just some vaules

[killerbee]

No slipings, as I know it dot rely on speed signa, as metter of fact I do not have speed signal conected. I do not look at numbers I need line shape ... I will make few tests this week