Quote:
Originally Posted by vtmike
I have the metallic rattle at 3.5k to 4k rpm with the nameless catted down pipe (no over pipe combo) and tune. It goes away on the stock tune.
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I have tried various combos of parts over the past year all with the same tune and I can say the noise I have now that has gotten worse with the nameless,l also had with the fa20 club header. When I had the fa20 header, i swapped from the nameless front / over pipe to a motive / hks combo for a short time, This noise went away during that time.
I am confident the noise i have is from metal to metal contact. However, I will dial back the intake cam advance this week for testing.. as that can result in a different noise, that I am not experiencing with the nameless header.
Just playing devils advocate here.. could that be because of reduced torque output on the stock tune? I do know that there are some noises you get from the AVCS settings, in particular using full intake cam advance around the stock "dip" area. But there are also the noises that can come from metal to metal contact. Intake cam related noises have more of a midrange tone to them, to my ear anyway, while metal to metal has a much higer pitch.
Also, while mine is easiest to reproduce between 3.5 - 4.5k, when WOT it continues through redline, though partially drowned out by the volume.