Variable timing live monitor
 

I am working on a better way of displaying what is going on inside our engine in a Dashcommand skin. It is still early days but wanted to share work so far on a portion of the skin that will display variable timing overlap in real time. Much more to come!

https://www.facebook.com/TunedECU/vi...0405013331208/

I also create custom skins for customers. Message me on Facebook or here for more info.

https://youtu.be/JnNKlB9xO_M


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This might help with the cam angles.

The exhaust cam closes before TDC at 0 retard and the same for the intake at 0 advance.

Thanks that should help work out if I have this right! I am measuring cam change angle on odb2 and drawing based on that. I saw a diagram that showed 3 degrees before TDC at closure point, so assumed anything negative was right of TDC.

Do you think I am representing retard wrong?


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Variable timing live monitor
 

Looks right based on this, apart from me measuring 0 as -3! I took the -3 from a different Toyota engine by mistake (google error) will fix it now

https://uploads.tapatalk-cdn.com/201...360595544c.png


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I think I have sorted it. Had the cam angle durations wrong for both sides. Thanks so much for spotting the error!


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The problem is that the diagram you posted shows more adjustment range than the cams actually have in the ROM. So I'm not sure if there's a hard or fast value or just to allow tollerances. The values that I got for the spreadsheet are a good indication. I just add cam overlap into my logs now, but even then it's not 100% helpful as its not easy to determine the cam lift.

Yeah I wondered if it was max tolerance.

Once question I have, should I show intake open at TDC or at -3.5 to the right as per this

https://uploads.tapatalk-cdn.com/201...30e8c39e40.jpg


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In that sheet 0 is TDC, negative is BTDC and positive is ATDC.

And so the base cam with no VVT change would be drawn as opening 3.5 degrees left of TDC?


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I guess my question is; when the table shows 0 advance for intake, what angle is the cam at? -3.5?

When the table shows 0 for exhaust what angle is the cam at

From that I can make this diagram accurate.


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At 0 the intake cam opens the valve at 3.5 degrees to the left of TDC and the exhaust valve closes at 7 degrees left of TDC.

Perfect and thanks for all the help will fix this now.


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Variable timing live monitor
 

Ok, think this now matches your sheet at 0 for both intake and exhaust


https://uploads.tapatalk-cdn.com/201...7bef03d1c9.jpg

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One more question, if the intake cam change is given as -10 would the intake be rotating clockwise 10 degrees or anti-clockwise 10 degrees from its 0 point ?


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