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Looked at you website for the over the axel pipes. Very nice. So the pipes come with a replacement GPF?
[QUOTE=Soul Performance;16744645]
Originally Posted by 2XIPA
.................... We are indeed removing the unmonitored GPF filters with our over axle pipes.
...........
Looking forward to finished products, John. Out of curiosity, is there a reason why you aren't calling it 'GPF/OPF-Delete Pipes'? It would be self-explanatory! :-)
Looking forward to finished products, John. Out of curiosity, is there a reason why you aren't calling it 'GPF/OPF-Delete Pipes'? It would be self-explanatory! :-)
Thanks very much!
As a business I would say it's prudent to avoid advertising products with any emissions-related terms where possible, otherwise yes you'd be correct
Best regards,
John Gaydos
__________________ SOUL PERFORMANCE PRODUCTS Quality Exhaust Solutions, Fair Pricing, and Outstanding Service
John Gaydos- Owner, Performance Specialist
Cell - (484) 883-6197 johng@soulpp.com
We have a valve control solution. Most of you know by now that the PSE programming is incredibly invasive. Even with the button pushed the valves will close under acceleration under near 5k rpm. Even with our Competition Over Axle Pipes deleting the particulate filters, this PSE programming still neuters the fun under 5k when you don't want it to. This can be installed to override the PSE system and keep the valves open 100% of the time. It can also then be deactivated and allow the PSE programming to function as normal. Switching between the two can be controlled by the included key fob, OR you can sync the signal of the key fob buttons to two of your three Homelink garage door buttons. The installation of this kit was fully documented with photos, and we made a video of how to sync the key fob functions with your Homelink system. These will be available shortly, and the valve controller kit is available to order for $175.
Ditching the factory cats and the particulate filters together with a combination of our Competition Headers and Competition Over Axle Pipes (maintaining factory PSE muffler), the car pulls Much harder without a doubt. This car has a lot of performance potential, and I very much look forward where software takes this car on top of this in the near future. The sound of this particular configuration eliminating the cats and the filters at the same time has a more raw character to it than just deleting the particulate filters or our race exhaust system, and has an excellent mild to wild transition for those that want to fly under the radar when not having an adrenaline rush. We will have a video of this setup posted up shortly.
When driving the car on highway with factory exhaust and factory PSE control....If you're cruising at a steady 3k rpms (at least that's where I tested it on a short highway drive) and you breathe on the throttle it introduces a very odd droning/fluttering noise. I confirmed this with multiple GT4 owners, and we believe this is either associated with cylinder deactivation, factory PSE valve control, or perhaps a combination of both. Keep in mind that this is normal with this new vehicle's platform and seems to only happen if you hit some sort of sweet spot with throttle input at cruising speed. The current development car is on it's way out the door and back to the customer to start beating on up at Monticello. Further testing will be done on this car and the next to hone in on this and see what we can do to eliminate it. Given of course it is not related to cylinder deactivation, I don't expect we can do much about that haha.
We have a valve control solution. Most of you know by now that the PSE programming is incredibly invasive. Even with the button pushed the valves will close under acceleration under near 5k rpm. Even with our Competition Over Axle Pipes deleting the particulate filters, this PSE programming still neuters the fun under 5k when you don't want it to. This can be installed to override the PSE system and keep the valves open 100% of the time. It can also then be deactivated and allow the PSE programming to function as normal. Switching between the two can be controlled by the included key fob, OR you can sync the signal of the key fob buttons to two of your three Homelink garage door buttons. The installation of this kit was fully documented with photos, and we made a video of how to sync the key fob functions with your Homelink system. These will be available shortly, and the valve controller kit is available to order for $175.
Nice to see a solution for this.
It’ll still be a while before I get my car. Is the 5000 RPM opening point specific to first gear, or did it open that late for you in higher gears too?
At least in the YouTube videos I’ve seen, such as various European reviews, and Fabspeed’s videos, the exhaust valves opened around 3800 RPM in second gear, and remained open in the low 3000s in third and higher gears. The European regulations on exhaust sound apply at 50 km/h, so opening around 5000 RPM in first gear sounds plausible, but wouldn’t make sense in higher gears, and didn’t seem to be the case for every other car I’ve seen.
When driving the car on highway with factory exhaust and factory PSE control....If you're cruising at a steady 3k rpms (at least that's where I tested it on a short highway drive) and you breathe on the throttle it introduces a very odd droning/fluttering noise. I confirmed this with multiple GT4 owners, and we believe this is either associated with cylinder deactivation, factory PSE valve control, or perhaps a combination of both. Keep in mind that this is normal with this new vehicle's platform and seems to only happen if you hit some sort of sweet spot with throttle input at cruising speed. The current development car is on it's way out the door and back to the customer to start beating on up at Monticello. Further testing will be done on this car and the next to hone in on this and see what we can do to eliminate it. Given of course it is not related to cylinder deactivation, I don't expect we can do much about that haha.
Best Regards,
John Gaydos
while annoying to have to do it, you can deactivate the cylinder deactivation by pressing the start/stop button on the console. This also cancels the cylinder deactivation at low load.
It’ll still be a while before I get my car. Is the 5000 RPM opening point specific to first gear, or did it open that late for you in higher gears too?
At least in the YouTube videos I’ve seen, such as various European reviews, and Fabspeed’s videos, the exhaust valves opened around 3800 RPM in second gear, and remained open in the low 3000s in third and higher gears. The European regulations on exhaust sound apply at 50 km/h, so opening around 5000 RPM in first gear sounds plausible, but wouldn’t make sense in higher gears, and didn’t seem to be the case for every other car I’ve seen.
You are correct, the valves opening point does change in the higher gears though still quite high and a buzzkill haha.
Originally Posted by tdlondon
while annoying to have to do it, you can deactivate the cylinder deactivation by pressing the start/stop button on the console. This also cancels the cylinder deactivation at low load.
Now that is very interesting. I'll add this into the testing procedures nice time I do some highway driving on this car. Thanks for the insight, I hadn't browsed through the owner's manual yet I'm sure that's in there somewhere
This week we received our test set of bend profiles for our Competition Over Axle Pipes. We used them to build the first production set, test fit them in the fixture, installed them on the car and no surprise they were a perfect fit! Now the full batch of bend profiles are confirmed for production and we expect to receive them and start fabrication of the preorders in late July/early August. Thank you to everyone who is already on the list, we are well on our way!
Now, what to do about this first set...Number 1 on the order list was Kart125, who I just called today to give him a nice surprise. Turns out he hasn't received his car yet, and guess who was kind enough to pass his set of pipes to the next guy in line? Kudos to you Louis, you're a good man and true petrolhead! Another fellow Rennlister GT4Nick was next up to bat, and they will be heading out his way tomorrow to give the rest of you some independent feedback. Here are some teaser photos of the finalized product and our video of them in action. If you'd like to get on the list, just give me a call at 4848836197 or shoot me an email at johng@soulpp.com
When driving the car on highway with factory exhaust and factory PSE control....If you're cruising at a steady 3k rpms (at least that's where I tested it on a short highway drive) and you breathe on the throttle it introduces a very odd droning/fluttering noise. I confirmed this with multiple GT4 owners, and we believe this is either associated with cylinder deactivation, factory PSE valve control, or perhaps a combination of both. Keep in mind that this is normal with this new vehicle's platform and seems to only happen if you hit some sort of sweet spot with throttle input at cruising speed. The current development car is on it's way out the door and back to the customer to start beating on up at Monticello. Further testing will be done on this car and the next to hone in on this and see what we can do to eliminate it. Given of course it is not related to cylinder deactivation, I don't expect we can do much about that haha.
I think that the drone is 100% related to the valve control, after I unplugged the vacuum lines this got sorted out. In my case I started to hearing from 3500 to 4000 and I think that the effect of beginning opening the valves (partially (?)).
I always drive with the auto off disabled so this is not caused by a cylinder deactivation IMHO
Nice looking pipes! Are those satin finish looking pipes Jet-Hot ceramic heat insulation coated?
That is actually our signature satin finish, which you can read all about on our blog post here : )
For your reference: Like the previous generation 987.1/987.2/981 exhaust systems (not from just us but most every exhaust manufacturer) we've found additional heat solutions to not be necessary to include for most applications, and we won't be providing it as standard on this vehicle. If our over axles pipes maintained a giant heat soak at the end in the form a particulate filter right by the rear tire, then yes a heat shield may be necessary. However, those are gone and no longer a concern
For those that simply want to go above and beyond without cost being a factor (no such thing as too much heat prevention) we will provide an optional service of having our over axle pipes sent to Jet Hot Ceramic Coating to have the inside and outside of the pipes coated in their entirety, which would provide better thermal retention characteristics vs a heat shield covering a portion of the exhaust. We are working out costing on this with Jet Hot as we speak, and expect to have that optional extra added shortly.
Originally Posted by metalone
I think that the drone is 100% related to the valve control, after I unplugged the vacuum lines this got sorted out. In my case I started to hearing from 3500 to 4000 and I think that the effect of beginning opening the valves (partially (?)).
I always drive with the auto off disabled so this is not caused by a cylinder deactivation IMHO
Fantastic to hear! I was more inclined to believe that myself as you could almost hear it trying to open but not? I expect this is caused more so by the PSE programming in some way, and I would expect our valve controller kit will prevent that in one of it's configurations.
I appreciate the photos you guys share of your products and cutaway views of oe parts. Interested in any dyno results as they become available (i may have missed some if they're out there already for your different configurations).
A pleasure to finally meet you on the phone today after all these years on the forums. Looking forward to working with you guys on the exhaust upgrades for my upcoming 718 GT4-PDK. I appreciate all of the time you all are spending on the R&D to get the best products out for our new cars. Very exciting to watch the progress as it happens in real time.
Jeff
Originally Posted by lovetoturn
I would agree, "Nice looking pipes". Minimized bends, few welds....... very smooth.
Jeff it was seriously a pleasure chatting with you, I appreciate you giving me a ring. About time we chatted on the phone haha. Thanks for the kind words on our development and the progressing of the products, this has been an excellent project
Originally Posted by horns
I appreciate the photos you guys share of your products and cutaway views of oe parts. Interested in any dyno results as they become available (i may have missed some if they're out there already for your different configurations).
In order to provide realistic and repeatable dyno results to the community, we will arrange to have the final production units tested by reputable independent third parties
As promised in post #108, here is a video of our Competition Headers and Competition Over Axles Pipes (no cats no particulate filters) with the factory PSE Muffler.
To review...Ditching the factory cats and the particulate filters together with a combination of our Competition Headers and Competition Over Axle Pipes (maintaining factory PSE muffler), the car pulls Much harder without a doubt. This car has a lot of performance potential, and I very much look forward where software takes this car on top of this in the near future. The sound of this particular configuration eliminating the cats and the filters at the same time has a more raw character to it than just deleting the particulate filters or our race exhaust system, and has an excellent mild to wild transition for those that want to fly under the radar when not having an adrenaline rush. We will have a video of this setup posted up shortly.
07-03-2020, 06:09 PM
