Equal Length Header Impressions
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That's a great explanation, thank you Mr. Kline. I'm generally uncomfortable with a turbo exhaust going through a 180 degree turn though, hence my question. Has your experience shown you that the scavenging effects of the exhaust pulses 'seeing' each other more than make up for the loss in energy from that bend?
I ask because every time I see any big bends in a turbo exhaust I cringe. All the Supras, GT-Rs and RX7s I've owned all had big straight exhausts. Should I not turn my nose up at it?....I can't help it I'm a loooong time turbo enthusiast and it's hard to change sometimes
I ask because every time I see any big bends in a turbo exhaust I cringe. All the Supras, GT-Rs and RX7s I've owned all had big straight exhausts. Should I not turn my nose up at it?....I can't help it I'm a loooong time turbo enthusiast and it's hard to change sometimes
We are currently working on an electroplating system, to cover the entire exhaust in a range of colours, from black chrome, to yellow cobalt. one of the problems is that our inconel exhausts float on the liquid electrolyte solutions, so we are working on a charged deposition spray.
In the meantime, very high temperature black paints that will bond to the inconel perfectly well, so long as the metal surface is clean from grease and dirt.
That's a great explanation, thank you Mr. Kline. I'm generally uncomfortable with a turbo exhaust going through a 180 degree turn though, hence my question. Has your experience shown you that the scavenging effects of the exhaust pulses 'seeing' each other more than make up for the loss in energy from that bend?
I ask because every time I see any big bends in a turbo exhaust I cringe. All the Supras, GT-Rs and RX7s I've owned all had big straight exhausts. Should I not turn my nose up at it?....I can't help it I'm a loooong time turbo enthusiast and it's hard to change sometimes
I ask because every time I see any big bends in a turbo exhaust I cringe. All the Supras, GT-Rs and RX7s I've owned all had big straight exhausts. Should I not turn my nose up at it?....I can't help it I'm a loooong time turbo enthusiast and it's hard to change sometimes
Well, like everything it’s all relative
Relative to the gains of the exhaust upgrade, the losses associated with bends is negligible, the gains associated with the x pipe is negligible, the net effect is negligible.
If you are crazy about shedding every possible gram, and every tenth of a horsepower, if you have already removed the passenger seats, stripped the interior, and replaced your side windows with plastic, really don’t care about on road driveability, then we can make you something like this from Inconel, that will only weight about 0.5kg
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If that inconel piece had a catalytic converter somewhere on it I'd actually be interested in it 
So the gains are from the increased diameter of the exhaust and the elimination of the 'mixing' chamber in the middle of the OEM muffler? So the rest of the design is engineered to produce the sound that you prefer? If so that's cool.
Also, I'm not too interested in weight, my 991 may be a bit rotund, but compared to some of it's competitors, the AMG GT-S and Nissan GT-R, it is 150kg lighter. I don't know how AMG managed to create such a porker
So the gains are from the increased diameter of the exhaust and the elimination of the 'mixing' chamber in the middle of the OEM muffler? So the rest of the design is engineered to produce the sound that you prefer? If so that's cool.
Also, I'm not too interested in weight, my 991 may be a bit rotund, but compared to some of it's competitors, the AMG GT-S and Nissan GT-R, it is 150kg lighter. I don't know how AMG managed to create such a porker
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Hi Nanook
We are currently working on an electroplating system, to cover the entire exhaust in a range of colours, from black chrome, to yellow cobalt. one of the problems is that our inconel exhausts float on the liquid electrolyte solutions, so we are working on a charged deposition spray.
In the meantime, very high temperature black paints that will bond to the inconel perfectly well, so long as the metal surface is clean from grease and dirt.
We are currently working on an electroplating system, to cover the entire exhaust in a range of colours, from black chrome, to yellow cobalt. one of the problems is that our inconel exhausts float on the liquid electrolyte solutions, so we are working on a charged deposition spray.
In the meantime, very high temperature black paints that will bond to the inconel perfectly well, so long as the metal surface is clean from grease and dirt.
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Joined: Aug 2016
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From: Los Angeles
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I'm pretty new in the Porsche modifing world and read a lot on here and went with the Kline catless system with headers, all in inconel. Sam from By Design set it all up for me with the Kline system, BMC filter, Cobb tune, intercoolers...the entire Stage 3 setup on my 2014 TTS.
THE CAR IS TRANSFORMED. I've modded motorcycles and cars a lot over the years, but this is another level. My experience has always been that after doing a mod on a vehicle, it works better and is noticeable but after not that many miles can be forgotten and just becomes part of the vehicle. It sucks to go backwards and remove a good mod because then the vehicle feels way slow, but it's largely just part of the vehicle. (This happened with a '16 Z06 I have that I put an intake and Ak on) This is not the case with this setup. The car sounds incredible and runs so strong that I'm still having a difficult time believing it, frankly. It's so fast the 4-wheel rolling burnouts are real until the car short-shifts...but that's just craziness.
For sure I wouldn't buy anything other than Kline at this point because now I know what to expect and I love it. Also, and probably even more importantly, Sam has been awesome to work with. There was a minor issue with my car and he had it handled first thing Monday morning (I picked the car up Saturday). But he was 100% accessible while we were troubleshooting the issue over the weekend. We made a plan and it was handled perfectly.
Overall the Stage 3 package Sam put together is incredible. Like, completely, thoroughly, fully incredible. Everyone I've given a ride to basically freaks out. And this after years of freaking people out made some of them think they were jaded and couldn't be freaked anymore...turns out they were wrong.
I wanted to do a full write up on the Stage 3 but I'm short on time lately. All I can say for certain is if you're thinking about it, do it. It's off the hook.
BTW, Stage 3 has now made my Z06 for sale.
P.S. There's been some talk on here in the last few weeks that could cast some doubt on people and companies. I can tell you that Sam and By Design was one of the best customer service experiences I've ever had. He actually tried to talk me OUT of Stage 3 so that I could enjoy the stage progression. I can't ever seem to anything bit by bit so I know Stage 4 is not far off.
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Joined: Aug 2016
Posts: 38
From: Ohio
Rep Power: 23
I'm pretty new in the Porsche modifing world and read a lot on here and went with the Kline catless system with headers, all in inconel. Sam from By Design set it all up for me with the Kline system, BMC filter, Cobb tune, intercoolers...the entire Stage 3 setup on my 2014 TTS.
THE CAR IS TRANSFORMED. I've modded motorcycles and cars a lot over the years, but this is another level. My experience has always been that after doing a mod on a vehicle, it works better and is noticeable but after not that many miles can be forgotten and just becomes part of the vehicle. It sucks to go backwards and remove a good mod because then the vehicle feels way slow, but it's largely just part of the vehicle. (This happened with a '16 Z06 I have that I put an intake and Ak on) This is not the case with this setup. The car sounds incredible and runs so strong that I'm still having a difficult time believing it, frankly. It's so fast the 4-wheel rolling burnouts are real until the car short-shifts...but that's just craziness.
For sure I wouldn't buy anything other than Kline at this point because now I know what to expect and I love it. Also, and probably even more importantly, Sam has been awesome to work with. There was a minor issue with my car and he had it handled first thing Monday morning (I picked the car up Saturday). But he was 100% accessible while we were troubleshooting the issue over the weekend. We made a plan and it was handled perfectly.
Overall the Stage 3 package Sam put together is incredible. Like, completely, thoroughly, fully incredible. Everyone I've given a ride to basically freaks out. And this after years of freaking people out made some of them think they were jaded and couldn't be freaked anymore...turns out they were wrong.
I wanted to do a full write up on the Stage 3 but I'm short on time lately. All I can say for certain is if you're thinking about it, do it. It's off the hook.
BTW, Stage 3 has now made my Z06 for sale.
P.S. There's been some talk on here in the last few weeks that could cast some doubt on people and companies. I can tell you that Sam and By Design was one of the best customer service experiences I've ever had. He actually tried to talk me OUT of Stage 3 so that I could enjoy the stage progression. I can't ever seem to anything bit by bit so I know Stage 4 is not far off.
THE CAR IS TRANSFORMED. I've modded motorcycles and cars a lot over the years, but this is another level. My experience has always been that after doing a mod on a vehicle, it works better and is noticeable but after not that many miles can be forgotten and just becomes part of the vehicle. It sucks to go backwards and remove a good mod because then the vehicle feels way slow, but it's largely just part of the vehicle. (This happened with a '16 Z06 I have that I put an intake and Ak on) This is not the case with this setup. The car sounds incredible and runs so strong that I'm still having a difficult time believing it, frankly. It's so fast the 4-wheel rolling burnouts are real until the car short-shifts...but that's just craziness.
For sure I wouldn't buy anything other than Kline at this point because now I know what to expect and I love it. Also, and probably even more importantly, Sam has been awesome to work with. There was a minor issue with my car and he had it handled first thing Monday morning (I picked the car up Saturday). But he was 100% accessible while we were troubleshooting the issue over the weekend. We made a plan and it was handled perfectly.
Overall the Stage 3 package Sam put together is incredible. Like, completely, thoroughly, fully incredible. Everyone I've given a ride to basically freaks out. And this after years of freaking people out made some of them think they were jaded and couldn't be freaked anymore...turns out they were wrong.
I wanted to do a full write up on the Stage 3 but I'm short on time lately. All I can say for certain is if you're thinking about it, do it. It's off the hook.
BTW, Stage 3 has now made my Z06 for sale.
P.S. There's been some talk on here in the last few weeks that could cast some doubt on people and companies. I can tell you that Sam and By Design was one of the best customer service experiences I've ever had. He actually tried to talk me OUT of Stage 3 so that I could enjoy the stage progression. I can't ever seem to anything bit by bit so I know Stage 4 is not far off.
It's no surprise about the customer service you got from Sam.
Enjoy!
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Joined: Nov 2005
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i’ve watched the video with the headers on and it sounds great ! subtile and somewhat similar to a 6 inline n/a engine, very stealth like. i love it, congrats!
that pulse of the left bank merges nicely with the pulse of the right bank. that's a great animation but isn’t that for a 2 cylinder boxer n/a engine ?
i think that on a 911 turbo the 3 pulses of each bank are smashed into pieces by the turbochargers so the flow must be much more homogeneous. must be the reason why a turbo engine sounds soo much quieter
seems like porsche uses the x on the 991 pse for another reason. half of the 400 hp is routed through the x so both banks get connected. quite something different than pushing 600-800 hp though that x
that pulse of the left bank merges nicely with the pulse of the right bank. that's a great animation but isn’t that for a 2 cylinder boxer n/a engine ?
i think that on a 911 turbo the 3 pulses of each bank are smashed into pieces by the turbochargers so the flow must be much more homogeneous. must be the reason why a turbo engine sounds soo much quieter
seems like porsche uses the x on the 991 pse for another reason. half of the 400 hp is routed through the x so both banks get connected. quite something different than pushing 600-800 hp though that x
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Joined: Sep 2016
Posts: 6
From: Greece
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The performance:
The headers work extremely well at moving gasses efficiently and because they are equal length, never colliding the pulses. So... performance must increase. If boost is limited, it means that the engines and turbos can be more efficient.
Equal length headers, being more efficient and not colliding pulses do change the sound. I can get more into it later, but under 3000 rpm and out of boost, aside from an occasional resonance, the car is slightly quieter. Pulses arent colliding, so the boxer rumble is gone. That makes the car quieter.
Above 3000 rpm, or on boost, the headers are more efficent though, and the "rumble" would just become muffling inefficiency.
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Joined: Apr 2008
Posts: 391
From: Portland, Oregon
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Sorry to ask but did these headers really make more power or just make more muffling? You say they "should" make power?... but with no before or after figures how will you know? Even to state more "efficient" is a little questionable.. you know member sdg say his losing power...removed back to stock...wrs saying his not lasting long and power is now doubt and will change to stock too. Just like to hear a proper feedback on if the benefits is really there??
We've actually run Dino test and picked up between 14 and 16 hp to 4 wheels. But there are other reasons why the manifolds make a amazing performance enhancement on these cars. The sound is also untouchable. Really like a GT3! All of our fastest record-breaking cars run the Kline equal length manifolds