IPD Plenum + Center Muffler Bypass= BINGO!
08-18-2012, 04:10 PM
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IPD Plenum + Center Muffler Bypass= BINGO!
Wow, what a difference!
I have a 997.2 C2S pdk. First I got the center muffler bypass crossover pipe (AWE), then the IPD Plenum....
The combo of improving air flow and reducing restriction has made a HUGE difference in the driving experience-- improved torque, responsiveness, smoothness, etc-- even in normal drive (non-sport) mode. In sport auto mode, it has become a beast. Even pdk shifts seem faster and smoother. And the sound is far superior too, though not loud.
Honestly, this is the way the car should have come stock....
(I've thought about ECU Softronic or Giac tune, but now I don't feel it's necessary)
I have a 997.2 C2S pdk. First I got the center muffler bypass crossover pipe (AWE), then the IPD Plenum....
The combo of improving air flow and reducing restriction has made a HUGE difference in the driving experience-- improved torque, responsiveness, smoothness, etc-- even in normal drive (non-sport) mode. In sport auto mode, it has become a beast. Even pdk shifts seem faster and smoother. And the sound is far superior too, though not loud.
Honestly, this is the way the car should have come stock....
(I've thought about ECU Softronic or Giac tune, but now I don't feel it's necessary)
08-18-2012, 06:17 PM
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I want a plenum for my car, the dyno graphs are impressive and the idea is simple enough. I'll have to ask my service department if there's any issues with warranty if ones installed in the car. I'd like to think not because it's a non moving part and all it does is direct airflow but you never know.
08-18-2012, 09:16 PM
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Mixed reviews on the IPD. I wanted one too but after reading dozens of posts I question if it actually works. Sort of like an air intake. It sounds good but may not bring much benefit. In theory, if the motor is the pump....bringing air in and out of the pump more efficiently would be a good thing right. I suspect Porsche has optimized the motors pretty well and the motor breaths good. Perhaps, 200 cell cats, headers, intake, exhaust and a tune could get you 25 HP for $10k.
I mean....look at the 3.8l GT3 motor upgrades. You need to spend $30k just to get another 100hp so I'm thinking Porsche has done a very good job to start. Just say'n. Let us know if you see anything from the butt dyno.
I mean....look at the 3.8l GT3 motor upgrades. You need to spend $30k just to get another 100hp so I'm thinking Porsche has done a very good job to start. Just say'n. Let us know if you see anything from the butt dyno.
08-18-2012, 10:05 PM
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It's all because of the muffler bypass, IPD won't have any noticable difference!
08-18-2012, 11:32 PM
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Mixed reviews on the IPD. I wanted one too but after reading dozens of posts I question if it actually works. Sort of like an air intake. It sounds good but may not bring much benefit. In theory, if the motor is the pump....bringing air in and out of the pump more efficiently would be a good thing right. I suspect Porsche has optimized the motors pretty well and the motor breaths good. Perhaps, 200 cell cats, headers, intake, exhaust and a tune could get you 25 HP for $10k.
I mean....look at the 3.8l GT3 motor upgrades. You need to spend $30k just to get another 100hp so I'm thinking Porsche has done a very good job to start. Just say'n. Let us know if you see anything from the butt dyno.
I mean....look at the 3.8l GT3 motor upgrades. You need to spend $30k just to get another 100hp so I'm thinking Porsche has done a very good job to start. Just say'n. Let us know if you see anything from the butt dyno.
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08-19-2012, 01:10 AM
#9
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i have the sharkwerks bypass. its certainly the best mod for $700.
however on our non GT cars i dont think theres enough air being directed into the engine. Put on a gt3 fixed wing w/ bigger inlets, IPD, Cats, reflash and then we'll have something
however on our non GT cars i dont think theres enough air being directed into the engine. Put on a gt3 fixed wing w/ bigger inlets, IPD, Cats, reflash and then we'll have something
Last edited by kosmo; 08-19-2012 at 10:31 AM.
08-19-2012, 01:57 AM
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Now my car is fast even in regular Auto mode. And I no longer get any pdk hesitation or jerkiness after cold start-ups. IT'S SMOOTH. Honestly, regardless of what the dyno shows, it's as if my engine can finally breathe right for the first time.....it's that noticible....
That being said, I've heard that the IPD alone won't help that much unless the center muffler restriction has been removed-- so you need to do the bypass first, prior to the IPD Plenum, or simultaneous.
08-19-2012, 12:58 PM
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Obviously, this is your money and if any mod makes you happy then go for it. However, the proof is in the pudding and personally I don't want to spend a $1,000 / HP. This reminds me of moding my mountain bike where it cost $100/gram to ligten it up.
The center muffler delete (For 997.2 / 997.1 doesn't have one) seems like a good mod along with the Gundo. Guys seem to love it. The 200 Cell seems to be an awesome mod but seems like a new Tune would be in order.
The center muffler delete (For 997.2 / 997.1 doesn't have one) seems like a good mod along with the Gundo. Guys seem to love it. The 200 Cell seems to be an awesome mod but seems like a new Tune would be in order.
Totally wrong. I had the center muffler bypass for about 2 months first. Really was a nice improvement. But the addition of the IPD Plenum after that was a huge leap. It is clear that the stock Plenum was way too restrictive.
Now my car is fast even in regular Auto mode. And I no longer get any pdk hesitation or jerkiness after cold start-ups. IT'S SMOOTH. Honestly, regardless of what the dyno shows, it's as if my engine can finally breathe right for the first time.....it's that noticible....
That being said, I've heard that the IPD alone won't help that much unless the center muffler restriction has been removed-- so you need to do the bypass first, prior to the IPD Plenum, or simultaneous.
Now my car is fast even in regular Auto mode. And I no longer get any pdk hesitation or jerkiness after cold start-ups. IT'S SMOOTH. Honestly, regardless of what the dyno shows, it's as if my engine can finally breathe right for the first time.....it's that noticible....
That being said, I've heard that the IPD alone won't help that much unless the center muffler restriction has been removed-- so you need to do the bypass first, prior to the IPD Plenum, or simultaneous.
08-19-2012, 01:01 PM
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08-19-2012, 01:20 PM
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I want a plenum for my car, the dyno graphs are impressive and the idea is simple enough. I'll have to ask my service department if there's any issues with warranty if ones installed in the car. I'd like to think not because it's a non moving part and all it does is direct airflow but you never know.
Wouldn't it be nice to see those "impressive dyno graphs" live?
Alternatively, you can search the WWW for people that did that already, in various P cars..
08-19-2012, 03:17 PM
#14
I wouldnt try to modify the intake on a GTS, because it already has the upgraded tuned induction intake, what ever that is, it is modified over the stock 997.2 intake.
08-19-2012, 03:38 PM
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To re-iterate my point: my engine and PDK loves the improved air flow. I can drive my car in stop-and-go traffic in SPORT AUTO mode now with virtually NO jerkiness. The PDK feels smoother and faster now--like the 991!
Don't exactly know why. But amazingly better.