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Ok. So I am one of those that was bothered by the drone between 2-3K rpms so I ordered the parts and just put them in. I will be honest I am not able to hear any difference. FWIW I have a FabSpeed valvetronic exhaust with their over axle pipes. I did notice they came out with a similar kit. I will continue to just keep my rpms over 3K lol.
Originally Posted by Bob Z.
This is why I opted to plug the hole coming into the cockpit...much easier with the same results, which are negligible.
Originally Posted by houstonbuckeye
I have a Spyder with straight OAP's and I really didn't notice any difference. I would have been surprised if I noticed a difference as the Spyder is quite loud with the uninsulated soft top, the particulate filters deleted and the valves open all the time.
Guys ^^^
I've been closely following this subject.
My decision is I'm leaving mine as it came from Porsche.
Seems to me Way-way to many people are stating they don't really hear all that much difference !!!
Thanks for your Honesty fellows on this matter ^^^
From all the comments posted it seems nothing really reduces the drone much. I plan to add some sound deadening material to the firewall behind the seats, covering the symposer hole in the process, and installing the factory GPF 's that I've bought and gutted. Report to follow, but don't have high hopes.
From all the comments posted it seems nothing really reduces the drone much. I plan to add some sound deadening material to the firewall behind the seats, covering the symposer hole in the process, and installing the factory GPF 's that I've bought and gutted. Report to follow, but don't have high hopes.
Probably not, but that wasn't my purpose in the experiment. I wanted to see if it helps any with power gain. Admittedly it will be difficult to tell, but an old guy needs a project, right?
Probably not, but that wasn't my purpose in the experiment. I wanted to see if it helps any with power gain. Admittedly it will be difficult to tell, but an old guy needs a project, right?
Generally speaking, most exhaust mods that free up flow are beneficial, however manufacturers are careful regarding claims of increased power.
Yes, with X431 bi-directional scanner I have seen the sound symposer listed there under coding options. I assume the same with option with PIWIS software if you have access to that.
Yes, but the easier solution is to push the exhaust button. Pushing the button has the added advantage of being easily reversible.
My stance now is that unless a person feels very strongly about decoupling a very minor behavior difference in the exhaust valves from this intake valve behavior (recall the button actually affects both systems), then the best solution is to leave the symposer alone. You paid for that sound; Porsche built it; it sounds good; let it be! Who’s looking to remove legit intake noise at high/full throttle and high rpm?
Well crap! I guess I’ll reinstall the symposer and get back some valuable garage storage space. I hope I can remember where everything hooks up.
After installing this delete kit, the symposer
housing is no longer attached to the bracket. What did you all do with it, just leave it floppy? I just put a tie wrap to the wiring bundle underneath it, but before I put the engine covers back tomorrow wanted to check.
After installing this delete kit, the symposer
housing is no longer attached to the bracket. What did you all do with it, just leave it floppy? I just put a tie wrap to the wiring bundle underneath it, but before I put the engine covers back tomorrow wanted to check.
yellolab,
Below are pictures sent to me on the SOUL symposer delete kit from my Tech.
Terry
Last edited by tigerhonaker; 03-19-2023 at 01:22 PM.
01-14-2022, 06:43 PM
