I am wanting to get some opinions from others with 3" QTP electric cutouts regarding the quality of the exhaust note while closed. My cutout is located after the merge on my Y-pipe, just before the exhaust bends upwards to go over the axle. I notice that there is a muffled resonance coming from the cutout when it's closed. If I cover the entire cutout with my hand then the sound goes away. It sounds like the plate is really thin. The result is a nasal sort of sound that is louder than the dual dual cat back. Anybody ever run in to this? Any decent solutions?

 

Nope, I run a race land cutout

 

So the sound was never there before the cutout was installed?

 

No, the car sounds completely normal when I cap the cutout.

 

Never noticed that with mine, and I ran a dual dual also at one point.

 

What brand of cutout?

 

I didn't notice a change when I had my cut-out/dual dual combo. Unfortunatly I don't remember the brand of cut-out.

 

Did you have a turn down?

 

No was straight out the cut-out.

 

The butterfly valve really wants to rattle and leak.
Only some residual shaft torque prevents that, like
rolling the gear motor into bind. Even then you may
want a film of RTV (if the cutout did not already have
a soft seating circle - ones I've seen had a groove
machined in, which looked to have some soft compound
in it).

I put my cutout way at the back where the muffler tips
drown it out when closed, as far as the "chuffing". But
in playing with alternative actuator schemes I have found
ways to make the plate rattle plenty.

 

Yes, chuffing! Lol, that is the best word to describe it. I'm going to take the cutout off and have a close look at it to see if I can improve the seal.

 

bead of permatex ultracopper and a turn down will calm it down a bunch

 

Open headers for life!

 

Qtp 4", it closed super tight.