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Can you or someone post (maybe the weblink?) the part (collar) to buy? I saw the thread about it and there was so many different options not sure which is correct?
I have taken the leap and ordered a Kline inconel exhaust with heat shielding for my GT4. Sticking with OEM headers. Will be replacing my FLAT6 OAPs and OEM backbox when the Kline exhaust arrives likely some time in September. Cannot wait to hear it in person. Thanks to all who took the time to post your experiences and sound clips.
I was cruising home yesterday evening after a dinner out. The top down, 8:30pm, 80F out still, beautiful weather, smooth road, 70mph and just the sound of wind and a underlying subtle hum of the exhaust. I was thinking how nice and quiet it was for that moment. Then I down shifted to 2nd and took a clover leaf at speed and accelerated out with that flat six scream, perfect for that moment... thats the personality I want from my exhaust.
@MrFunk I have a couple more questions about your setup if you don't mind. You are attenuating (fine tuning) the sound of the exhaust from valves fully open to a partially open scenario.
From what I understand, you have placed a physical obstruction in the path of the valve stem to prevent it from retracting fully when a vacuum is applied to the valve. Do you hear a metallic sound as the stem retracts and collides with the collar? Second, are you not concerned about the long term reliability of this set up with repeated collisions of the valve stem/valve body with the physical obstruction such as the stem breaking off?
The other question I have is can you leave the vacuum lines disconnected and then physically adjust the position of the valve stem before placing the collar around it? That way, the PSE swtich would only operate the sound symposer. Of course in this case, your valves will never open fully but you will avoid the repeated collisions of the collar with stem. Any downside to that besides never hearing the exhaust with fully open valves?
I understand that. Why does removal need to be traceless as in leave no evidence behind. Sound like something to hide from Porsche. No?
You're really reading into too much. I think it's pretty clear they mean nothing permanent is left behind when removed. Some modifications require cutting of factory parts to fit, meaning when removed there's remnants of a previously installed modification. To some people that can turn them off buying a used car.
@MrFunk I have a couple more questions about your setup if you don't mind.
Do you hear a metallic sound as the stem retracts and collides with the collar? Second, are you not concerned about the long term reliability of this set up with repeated collisions of the valve stem/valve body with the physical obstruction such as the stem breaking off?
The other question I have is can you leave the vacuum lines disconnected and then physically adjust the position of the valve stem before placing the collar around it? That way, the PSE swtich would only operate the sound symposer. Of course in this case, your valves will never open fully but you will avoid the repeated collisions of the collar with stem. Any downside to that besides never hearing the exhaust with fully open valves?
No problem.
1. No I do not hear any metallic sound as the valves close.
2. No I am not concerned about long term reliability in any way. The "collision" isn't that violent that it would damage anything. You're just limited the distance a hinge is moving. What component would you be concerned about? In fact - I would argue the opposite, that by disconnecting the vacuum lines and leaving the valves fully open and not moving anymore, you are risking them becoming seized over time by lack of use and corrosion...
3. No the collar would not do anything if the valves are disconnected because the "resting" position of the valves is fully open (as in the picture I posted), anywhere along the stem that you place the collar simply stops it from closing... if it's not trying to close then the collars have nothing to do.
I think for #3 @subwoofer is asking if you could "wire" it such that plunger is partially closed to the position that the collar limits to which would avoid the so called "collison", but give you a always partially opened valve. I've seen the BMW guys do this.
It still wouldn't address the concern of the valve becoming seized over time.
No problem.
1. No I do not hear any metallic sound as the valves close.
2. No I am not concerned about long term reliability in any way. The "collision" isn't that violent that it would damage anything. You're just limited the distance a hinge is moving. What component would you be concerned about? In fact - I would argue the opposite, that by disconnecting the vacuum lines and leaving the valves fully open and not moving anymore, you are risking them becoming seized over time by lack of use and corrosion...
3. No the collar would not do anything if the valves are disconnected because the "resting" position of the valves is fully open (as in the picture I posted), anywhere along the stem that you place the collar simply stops it from closing... if it's not trying to close then the collars have nothing to do.
Thanks for your detailed response. I agree that leaving the valves sitting idle for long periods of time may not the best for longevity. I am not bothered at all about the sound with the valves fully open and actually I relish the noise. Haha. But of course my wife loathes it and will not ride in the car with me for any length of time. She found the OEM exhaust to be too loud so your solution of attenuating the sound with collars may not provide an adequate level of noise suppression for her.
I am now thinking of buying the cargraphic valve controller and use that to silence the car when she is with me.
Dumb question time: I'm getting closer to convincing myself to take this leap to a Kline setup. But one concern is that though my BGTS is now in Benicia and hopefully just a week or two from delivery, I'm also on the list for Spyder RS. If I get lucky enough to get a Spyder RS, would the exhaust be as impactful on the RS as it is on the GTS? Any compatibility issues or could it swap over?
Dumb question time: I'm getting closer to convincing myself to take this leap to a Kline setup. But one concern is that though my BGTS is now in Benicia and hopefully just a week or two from delivery, I'm also on the list for Spyder RS. If I get lucky enough to get a Spyder RS, would the exhaust be as impactful on the RS as it is on the GTS? Any compatibility issues or could it swap over?
I had 718 Spyder with Kline and now Spyder RS in break in process, system is no compatible, and the Spyder RS engine and intake sound is far better than Kline exhaust sound in a regular Spyder. it does not mean a Kline in a RS will not make difference but you can be happy with the stock interior sound; in my previous Spyder it was a must, I installed it with 400 miles during break-in, I cannot live with the tone from factory.
07-21-2024, 10:47 AM
