Quote:
Originally Posted by Dezoris
Here is the comparison video of the before and after tuning. One with aggressive cam angle and one with stock angle. I am keeping the tune with the stock angle, much more refined. Dyno scheduled for 2 weeks.
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I'm not going to say you shouldn't run the stock VVT mapping, but the noise is 100% there with both tunes in that video.
It's more pronounced on the aggressive tune, but it's most definitely there on the stock VVT mapping.
If the noise you were getting was from the rapid rate of change in cam angles it would be more pronounced in 1st and 2nd where the revs are climbing faster so the cam would be changing angles even faster. Instead, it's most pronounced in 4th where there's more load on the engine and the revs climb slower.
I bet if you pull a log of VVT angle change on the stock mapping in 2nd it's changing angles faster than the most aggressive tune you have does in 4th gear.
At the end of the day it's your car, and you have to be happy with it, but IMO there's nothing wrong with the noises it made on the more aggressive VVT mapped tune.