help identifying noise at high rpms
 

Hi, new owner of an s5 n/a and I'm trying to identify a noise it's making at high rpms and if I should be concerned..

Bone stock other than a 2.5" resonated midpipe that bolts up to the stock manifold and then to the stock y-pipe - still running stock mufflers. Here's what I'm noticing:

When I rev it up to 7k WOT and shove in the clutch I hear the noise - best I can describe it is a 'clank' of some sort. I thought it sounded like metal on metal but I'm not sure.

If I slowly rev it up to 7k and gently let off the throttle - no noise

If I rev it up to 6k WOT and shove in the clutch - no noise

If I rev it up to 7k WOT and let off the gas without engaging the clutch, I hear it..


Could it just be backfiring? Doesn't really sound like a 'pop'. Could it be tranny related?

Thx

Yep.

You could just NOT rev it up that high you know ;)

is this while driving?

Yeah but where's the fun in that?? :P

I hear ya though, I don't do it all the time but when I am pushing it, just want to make sure she's healthy. It is while driving, and I can get it to produce the noise like clockwork.. shouldn't backfiring be a little more unpredictable?