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It's not so much about making the connection as much as taking the car apart to get to the connection. But no, it's not all that much work and I've always wanted to see the top of the motor
Seeing the engine is the bonus of the exercise! Plus for me I like the ability to choose always open or OEM programming.
Check out the Obsessed Garage video on YouTube posted today (1/5/20) “Soul Performance Valved GT4 Exhaust”. Matt had unplugged his valves for a few weeks and went to install the Soul valve controller with their new valved exhaust. Install was pretty straightforward but when he plugged them back in, the lines would not seat well back on the valve unit. Apparently the lines stretch when first installed and they don’t fit tight enough to maintain the vacuum. As a result the valves didn’t operate correctly. He replaced the lines and all was good. Might be what some on here are experiencing.
The inner lining of the vacuum line is not very pliable, it takes a fair pressure to seal it on the exhaust valve, I wouldn't rely on just a slip on fit. As for the need to replace the line, there is a fair amount of slack, cutting off a cm or two to get a clean end should be possible.
Check out the Obsessed Garage video on YouTube posted today (1/5/20) “Soul Performance Valved GT4 Exhaust”. Matt had unplugged his valves for a few weeks and went to install the Soul valve controller with their new valved exhaust. Install was pretty straightforward but when he plugged them back in, the lines would not seat well back on the valve unit. Apparently the lines stretch when first installed and they don’t fit tight enough to maintain the vacuum. As a result the valves didn’t operate correctly. He replaced the lines and all was good. Might be what some on here are experiencing.
watching this "Obsessed Garage" video is painful, he doesn't realize the (SOUL) solenoid is supposed to be inline with the vacuum source and the T connectors leading to the valves. He doesn't seem to know that the valves are kept open by spring pressure until vacuum pulls them closed, the purpose of energizing the additional solenoid is to block the vacuum from the car's controller from pulling the valves closed, thereby overriding the PSE button.
After a few days of driving with the valves wired open, I do not feel the need for any other exhaust mods. If some are concerned about excessive attention in built up areas, it is pretty easy to modulate the the throttle and control the sound.
The advantages of the wire method as I see it
- Simple, minimal cost, no need to access the engine compartment, or transmission area, avoidance of possible difficulty reattaching vacuum lines, very easy just to remove/replace wires if concerned about Porsche Warranty.
My only question - can any body think of possible harm from valves always open?
After a few days of driving with the valves wired open, I do not feel the need for any other exhaust mods.
If you're happy, we're happy!
Originally Posted by AusGTS4.0
If some are concerned about excessive attention in built up areas, it is pretty easy to modulate the the throttle and control the sound.
The advantages of the wire method as I see it
- Simple, minimal cost, no need to access the engine compartment, or transmission area, avoidance of possible difficulty reattaching vacuum lines, very easy just to remove/replace wires if concerned about Porsche Warranty.
My only question - can any body think of possible harm from valves always open?
I have had my Spyder for 800 miles now and have not tried to go beyond 5k but frankly I can't tell the difference between PSE on/off so far. As this thread suggests a significant improvement below 4k with plug or wire , being a non DIY and has never done any mods on any cars I want to give valve wiring a try as it seems the lowest risk option.
May I ask (sorry if sound silly):
1. Is there a valve on both sides that needs to be wired?
2. Do I need to PSE button on or off once valve(s) wired? Does it matter either way? Can I damage anything by having the PSE status either way?
3. Does valve always open affect gas mileage?
I have had my Spyder for 800 miles now and have not tried to go beyond 5k but frankly I can't tell the difference between PSE on/off so far. As this thread suggests a significant improvement below 4k with plug or wire , being a non DIY and has never done any mods on any cars I want to give valve wiring a try as it seems the lowest risk option.
May I ask (sorry if sound silly):
1. Is there a valve on both sides that needs to be wired?
2. Do I need to PSE button on or off once valve(s) wired? Does it matter either way? Can I damage anything by having the PSE status either way?
3. Does valve always open affect gas mileage?
x's 2 /\ /\ /\. :this:
I'd like to know these answer's as well. I have not not crawled under there yet to look at stuff.
What kind of wire? Is there a video or photo's of someone doing it?
Last edited by Fxanimator1; 01-07-2021 at 10:50 AM.
I have had my Spyder for 800 miles now and have not tried to go beyond 5k but frankly I can't tell the difference between PSE on/off so far.
That's the problem... Valves are open at start up then close shortly after. The ECU overrides the PSE button and keeps the valves closed until higher RPMs are achieved (4-5k+). That is why you can't tell a difference.
I have had my Spyder for 800 miles now and have not tried to go beyond 5k but frankly I can't tell the difference between PSE on/off so far. As this thread suggests a significant improvement below 4k with plug or wire , being a non DIY and has never done any mods on any cars I want to give valve wiring a try as it seems the lowest risk option.
May I ask (sorry if sound silly):
1. Is there a valve on both sides that needs to be wired?
2. Do I need to PSE button on or off once valve(s) wired? Does it matter either way? Can I damage anything by having the PSE status either way?
3. Does valve always open affect gas mileage?
1, yes a valve on each side
2, not sure, I personally see advantages in being able to choose valves open and closed as desired.
3, really? Does it matter, you did buy a performance sports car mileage is not even a consideration for most.
I have had my Spyder for 800 miles now and have not tried to go beyond 5k but frankly I can't tell the difference between PSE on/off so far. As this thread suggests a significant improvement below 4k with plug or wire , being a non DIY and has never done any mods on any cars I want to give valve wiring a try as it seems the lowest risk option.
May I ask (sorry if sound silly):
1. Is there a valve on both sides that needs to be wired?
2. Do I need to PSE button on or off once valve(s) wired? Does it matter either way? Can I damage anything by having the PSE status either way?
3. Does valve always open affect gas mileage?
Originally Posted by Fxanimator1
x's 2 /\ /\ /\. :this:
I'd like to know these answer's as well. I have not not crawled under there yet to look at stuff.
What kind of wire? Is there a video or photo's of someone doing it?
Guys,
Make me officially the 3rd member wanting to see the answers/replies to the OP concerns/questions ???
I have many times thought about doing a separate thread and asking the same or similar questions.
I didn't as I don't have the GT4 so thought just maybe I'll see someone ask and simply read what others have to say ???
To me it seems like if you have the optional PDK for 2021 and using the Manual-Shifting you can easily be in the RPM range that the Electronics will Automatically Open-the-Exhaust-Valves.
Especially with the 7-Speed PDK having "Shorter-Gearing-Ratios" than the 6-Speed manuals.
And that being the case then No-Need for any Wiring or other Modification ...............
I personally don't want to Change/Modify anything on the GT4 as I don't want any Questions come up over any part of Warranty-Coverage.
Terry
Last edited by tigerhonaker; 01-07-2021 at 12:10 PM.
1, yes a valve on each side
2, not sure, I personally see advantages in being able to choose valves open and closed as desired.
3, really? Does it matter, you did buy a performance sports car mileage is not even a consideration for most.
Just to be clear the "Gas Mileage" question is not a thing for me, as I left a more fuel efficient 2.0 turbo 2018 718 Cayman for this one.
I wired the valves open a couple days ago and with the Akro Link pipe, the car sounds perfect for me. Sounds a lot like my 996 GT3. Wire is by far the easiest and cheapest way to fix this.
Just wired my valves open but haven't had a chance to take it for a drive. Pretty easy to do and didn't even have to lift the car or anything. Little sore now though haha. Will let you guys know what I think after a drive.
Last edited by RavinS4; 01-08-2021 at 11:21 AM.
Reason: Meant open oops
Here's a pic of my DIY wire job.
I found using a thin wire but 3 separate applications gave an easier and sufficiently strong fit
(The wires are applied with the car off and then the valves are in the default open position.)
Last edited by AusGTS4.0; 01-08-2021 at 01:46 AM.
Reason: format
That looks pretty sturdy on your job. I was able to do it with one strand of wire but if that doesn't hold well enough I am going to go to a couple of strands
01-06-2021, 12:30 PM
