Cutouts create undesired sound when closed
11-05-2015, 11:09 PM
#1
Cutouts create undesired sound when closed 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?
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11-09-2015, 07:39 PM
#10
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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.
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.
11-10-2015, 09:57 AM
#11
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.
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.
