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CAMCMD is changing even though table is constant

Posted: Wed Dec 23, 2015 1:22 pm
by AWH
Greetings,

Had something weird show up during a track day over the weekend.

My high cam table is set entirely to 30 degrees cam advance, yet I am seeing CAMCMD values less than that periodically at WOT. The datalog snippet shows this most noticeably at 1:38 timestamp. That one may be related to nearing the rev limiter, but it also shows up at 0:14, 1:26, 1:32 and 2:01 where it is not on the limiter.

It was only this one final session, and I've never seen it before. But it is concerning. Thoughts?

--Andy

Re: CAMCMD is changing even though table is constant

Posted: Wed Dec 23, 2015 2:49 pm
by Spunkster
You need to show the tables under boost as well, as it is interpolating a lower value from the higher columns. Everything looks pretty normal.

Re: CAMCMD is changing even though table is constant

Posted: Wed Dec 23, 2015 4:16 pm
by AWH
Spunkster wrote:You need to show the tables under boost as well, as it is interpolating a lower value from the higher columns. Everything looks pretty normal.
Bingo!

Yep, that's it. While it is a naturally aspirated motor, at these speeds (140+) it is getting a little bit of positive pressure due to my new cold air intake setup. Easy fix.

Thanks guys!

And Merry Christmas!