UncleDude

Goodwood, did you get the rear section yet?

Goodwood

Yessiree! Running stock front (Headers), and midsection (GPF), with Soul Valved Exhaust+Valve Controller, and Symposer removed and holes plugged. Drone is minimal @2k, and the sound is sweet, just loud(er) enough for me. When it gets to 4k and above, it just sings!
The only problem I am having is this super annoying steering wheel vibration between exactly 2400 and 2800 rpms, It's very noticeable in Sport mode w/valves forced open. John tell me he's never heard of anyone else complaining about that. I need to take it back in for an inspection to see if anything's touching or rubbing against the body or anywhere else. And, sure the obvious workaround is don't stay in that limited rpm range, but that's a PIA when cruising in town traffic with fairly frequent shifting. I dunno, it's a weird mystery right now.

UncleDude

Hmm, that is weird let us know what you find out. For the drone, does it show up valves open and closed? Glad you like the tone!, from the vids it has that nice blended higher pitched tone.

Paulywanacracker

Pardon my question, but this is a massive thread to search.

Assuming the PSE (Porsche Stock Exhaust) valves are always set to the open position, after installing only the SOUL OAP (Over Axel Pipes), about how much HP gain might I reasonably expect?

Westcoast

Pauly, You REALLY should read the thread!

FWIW, PSE: Porsche Sport Exhaust. Also unless you have a valve controller the valves close from about 1800-4000 RPM.

Reports on HP increases vary but with OAP delete alone, perhaps 3-8 HP

Alipapa

I am collect my spyder next week.

Do I need to have the ECU tuned if I want to replace the OAP (Hong Kong car)?

Westcoast

Only if your Porsche has monitored GPF... otherwise no.

Alipapa

THX, so if see there is sensor connected to the OPF then I need 3rd party to tune the ECU, correct? Can it be done by PIWIS?

Westcoast

That's correct, if you see sensors then removing the GPF may require an ECU tune, I don't think that you can modify any setting with the PIWIS to compensate. All of the 718 4.0l cars have the same exhaust, if you see one in the wild the GPF and the sensor is viewable from behind, you can actually see the blank spot on the GPF if it has no sensor.

EDIT: add a picture showing non-monitored GPF and where the sensors would be located if they were monitored.

Paulywanacracker

I appreciate the encouragement to read this Tome of a thread.

I have actually read most of the most important bits, so I have most of my questions answered, bit I rely on you thread pros to help me get to the end game.

I really like SOUL comp OAP, but I am leaning towards Cargraphic Exhaust Control Valve, mainly because it's less invasive, even though massively overpriced. Yea, Yea, I know it's easy and re-convertible, but that is my preference. Convince me otherwise

I have a question:

When using the Cargraphic wireless transponder to connect to the Home-Link above the rear view mirror...

Since I desire to purchase the (3) mode model (Sport, Comfort, Automatic), will one button work to advance thorough all (3) setting? Or, must I use all (3) Home-Link buttons "each individually 1-2-3" for each of the (3) modes? So that there are no remaining buttons to program my garage doors?

Or does the Home-Link work just like the (included transponder) and utilize only (1) needed button, on my Home-Link system?

tdlondon

Each HL button will be assigned to one function/mode. You can't toggle through functions with only one homelink button programmed.
Also maybe I'm missing something but I don't see the benefit of the 3 mode one for 100 EUR more. I have the 2 mode controller. You have either always open or PSE default, which you then control with the regular button on the center console. PSE off means valves always closed, and PSE on means activated with the stupid 1800-4000 RPM closing. This way you only use 2 of the 3 HL buttons and leave one free for your garage door opener

Paulywanacracker

The benefit of the 3 mode system (Part No. EXFLAPRCPO13) is as follows per the Cargraphic website:

• SPORT mode: valves always open
• COMFORT mode: valves always closed
• AUTOMATIC mode: factory control is reactivated

Hence, the valves can remain in the closed position for 100% of the time, (best noise reduction, but not recommended under sustained high rpm load), whereas in Factory Automatic mode, they are 1st open upon start, then close between 1-5k rpm, and do not open until approximately after 5k rpm.

This is a European sound regulation that gets imposed upon other countries by cost prohibitive default. Also, used in Canada, for low noise race tracks, with overheating caution as a concern.

The 2 button unit (Part No. EXFLAPRCPO1) only has two modes....

- SPORT mode: valves always open
- AUTOMATIC mode: factory control is active

Obviously, The 2 mode unit has (2 buttons) and the 3 mode has (three buttons). Not always obvious from the website and minimal directions.

Programing can be placed anywhere on the Porsche HomeLink (3) button upper console. In the order of the (3) modes a driver so chooses to program. Example:

HL#1=Sport Always Open (Stays in memory until changed to another mode)
HL#2=Comfort Always Closed (Stays in memory until changed to another mode)
HL#3=Garage Door Opener or programed to Revert to Factory mode (Stays in memory until changed to another mode)

Any can be mixed and programed in any order of the three, but are constant on the (2 or 3 button) supplied remote.

As far as I know the above statements are correct sir.

lowbee

Sustained High rpm operation or overheating will not be a concern when the valves are 100% closed as long as the pipe diameter of the closed path is equal to or larger than the OAP pipe diameter. The valve closed path on most aftermarket rear muffler sections have smaller pipe diameter than the OAP pipe; however, I found an aftermarket exhaust with closed path pipe diameter as big as the OAP pipe so I don't think you will have any problem using that exhaust with valves 100% closed. The exhaust that I am speaking about is from a UK vendor called Ninemeister.... I am leaning toward getting this one unless there is another one out there that has larger closed path pipe diameter and an X-pipe design....

808c2s

I believe CG has 2.5" for both closed and open valve pathways, thus they can be ran in close position 100% of the time if desired.

Check this out

Bob Z.

If someone wants a deal on Soul Race Exhaust (resonated version) send me a PM. I would up with 2 of them (long story) and 1 is for me!