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Yamaha 1800 Pwc Turbo cylinder 4 ignition trim problem


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Posted

Hello Everyone,

I have a yamaha 1800 turbo conversion pwc,I'm trying to do the tuning myself.I use 8.5 compression, 95 ron pump fuel 16 psi continuous pressure,While going to wot, 4 cylinders are trimming at -8 degrees ignition.4 egt sensors are installed on the engine and everything seems equal,my compression values are equal,Also, could this be the reason why my knock level is high?Or am I experiencing this because of fuel quality?I'm trying to understand if there is a problem before reducing the pressure and timing.Since this is a pwc, it is very difficult for me to get a pc log.Thank you very much in advance for your support on this issue.

 

log link:https://wetransfer.com/downloads/1b6f6785e33c3c7fb755b8e86af63b1720241007141934/09716b3297938908ff547cff34f7138b20241007142027/76ec8c?trk=TRN_TDL_01&utm_campaign=TRN_TDL_01&utm_medium=email&utm_source=sendgrid

kusursuzz.pclr

Posted

There is no way to know if the knock control has been set up correctly without validating with audio knock detection.  But my feeling based on some of the unusual settings in the knock control function, is that the knock control has probably never been properly setup and validated. 

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