av8 Posted July 17, 2022 Report Share Posted July 17, 2022 Hi, I'm trying to check if my VCT is working properly without access to a dyno. RB25DET NEO / standard cams / LinkG4X The VCT solenoid is working (clicks on and off when testing) and it has been set to come on at 1500 and off at 4700rpm but i can't really feel the difference when driving with it on or off ... so I'm after some help with how to set up logging to record intake cam position/cam timing so i can do a couple of logs, 1: with VCT enabled and 2: with it disabled do see if I'm getting the claimed 20' advance when it is engaged. many thanks Quote Link to comment Share on other sites More sharing options...
Adamw Posted July 17, 2022 Report Share Posted July 17, 2022 Im not real knowledgeable with RB25's but as far as I remember they dont even have a position sensor on the VCT cam, so there is no way to see cam position in the ECU software. If you put the VCT aux into test mode when idling I would expect you should hear the difference if it is moving - it will run rougher or lambda will change etc. Quote Link to comment Share on other sites More sharing options...
av8 Posted July 17, 2022 Author Report Share Posted July 17, 2022 31 minutes ago, Adamw said: Im not real knowledgeable with RB25's but as far as I remember they dont even have a position sensor on the VCT cam, so there is no way to see cam position in the ECU software. If you put the VCT aux into test mode when idling I would expect you should hear the difference if it is moving - it will run rougher or lambda will change etc. Hi Adam, thanks for this ... makes sense if i don't have a cam angle sensor on the inlet cam then i can't log it When i set VCT to on at idle, it makes the idle go rough as hell, so it's definitely doing something ... I was just curious to see how much advance I'm actually getting Quote Link to comment Share on other sites More sharing options...
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