Anyone running Sport Cats and Headers only? (wPSE)
01-05-2023, 02:00 PM
#61
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The exhaust systems making the biggest power are ones that are a true 3", valve-less, and have an x-pipe where the two banks blend together.
Systems that are valved have a small bottleneck there, and any divorced systems also lose power and torque. These are units that have split banks, meaning each exhaust exit is just 3 cylinders of exhaust rather than 6. It also has a "pulsey" sound on the divorced ones. The x-pipe ones make more power and they also sound better. Sound preference is relative as well, so take that opinion on sound with a grain of salt. But a true flat 6 Porsche sound is typically always blended banks.
We have also found in our testing that aftermarket headers tend to lose power. EMAP gets higher and puts pressure on the wrong side of the turbo. We have actually installed aftermarket EMAP sensors on headers for testing to confirm our findings. The OEM doublewalled and port-matched headers from Porsche work fantastic, and there is no reason to change them out, even with upgraded turbos. Perhaps in the future an aftermarket solution will come out that lowers EMAP and gives better power, but for now we recommend to stick with stock headers.
-Charles@M
Systems that are valved have a small bottleneck there, and any divorced systems also lose power and torque. These are units that have split banks, meaning each exhaust exit is just 3 cylinders of exhaust rather than 6. It also has a "pulsey" sound on the divorced ones. The x-pipe ones make more power and they also sound better. Sound preference is relative as well, so take that opinion on sound with a grain of salt. But a true flat 6 Porsche sound is typically always blended banks.
We have also found in our testing that aftermarket headers tend to lose power. EMAP gets higher and puts pressure on the wrong side of the turbo. We have actually installed aftermarket EMAP sensors on headers for testing to confirm our findings. The OEM doublewalled and port-matched headers from Porsche work fantastic, and there is no reason to change them out, even with upgraded turbos. Perhaps in the future an aftermarket solution will come out that lowers EMAP and gives better power, but for now we recommend to stick with stock headers.
-Charles@M
The following 6 users liked this post by M Engineering:
AlterZgo (01-08-2023),
Andy2021 (01-07-2023),
Fullyield (01-07-2023),
Master Deep (01-05-2023),
tourenwagen (01-05-2023),
and 1 others liked this post.
01-05-2023, 03:17 PM
#62
Three Wheelin'
Awesome info Charles, thank-you.
01-07-2023, 10:17 AM
#64
The exhaust systems making the biggest power are ones that are a true 3", valve-less, and have an x-pipe where the two banks blend together.
Systems that are valved have a small bottleneck there, and any divorced systems also lose power and torque. These are units that have split banks, meaning each exhaust exit is just 3 cylinders of exhaust rather than 6. It also has a "pulsey" sound on the divorced ones. The x-pipe ones make more power and they also sound better. Sound preference is relative as well, so take that opinion on sound with a grain of salt. But a true flat 6 Porsche sound is typically always blended banks.
We have also found in our testing that aftermarket headers tend to lose power. EMAP gets higher and puts pressure on the wrong side of the turbo. We have actually installed aftermarket EMAP sensors on headers for testing to confirm our findings. The OEM doublewalled and port-matched headers from Porsche work fantastic, and there is no reason to change them out, even with upgraded turbos. Perhaps in the future an aftermarket solution will come out that lowers EMAP and gives better power, but for now we recommend to stick with stock headers.
-Charles@M
Systems that are valved have a small bottleneck there, and any divorced systems also lose power and torque. These are units that have split banks, meaning each exhaust exit is just 3 cylinders of exhaust rather than 6. It also has a "pulsey" sound on the divorced ones. The x-pipe ones make more power and they also sound better. Sound preference is relative as well, so take that opinion on sound with a grain of salt. But a true flat 6 Porsche sound is typically always blended banks.
We have also found in our testing that aftermarket headers tend to lose power. EMAP gets higher and puts pressure on the wrong side of the turbo. We have actually installed aftermarket EMAP sensors on headers for testing to confirm our findings. The OEM doublewalled and port-matched headers from Porsche work fantastic, and there is no reason to change them out, even with upgraded turbos. Perhaps in the future an aftermarket solution will come out that lowers EMAP and gives better power, but for now we recommend to stick with stock headers.
-Charles@M
01-07-2023, 10:46 AM
#65
Former Vendor
So why do they make headers for the 992 and claim they make more power?
02-16-2023, 09:12 AM
#66
The exhaust systems making the biggest power are ones that are a true 3", valve-less, and have an x-pipe where the two banks blend together.
Systems that are valved have a small bottleneck there, and any divorced systems also lose power and torque. These are units that have split banks, meaning each exhaust exit is just 3 cylinders of exhaust rather than 6. It also has a "pulsey" sound on the divorced ones. The x-pipe ones make more power and they also sound better. Sound preference is relative as well, so take that opinion on sound with a grain of salt. But a true flat 6 Porsche sound is typically always blended banks.
We have also found in our testing that aftermarket headers tend to lose power. EMAP gets higher and puts pressure on the wrong side of the turbo. We have actually installed aftermarket EMAP sensors on headers for testing to confirm our findings. The OEM doublewalled and port-matched headers from Porsche work fantastic, and there is no reason to change them out, even with upgraded turbos. Perhaps in the future an aftermarket solution will come out that lowers EMAP and gives better power, but for now we recommend to stick with stock headers.
-Charles@M
Systems that are valved have a small bottleneck there, and any divorced systems also lose power and torque. These are units that have split banks, meaning each exhaust exit is just 3 cylinders of exhaust rather than 6. It also has a "pulsey" sound on the divorced ones. The x-pipe ones make more power and they also sound better. Sound preference is relative as well, so take that opinion on sound with a grain of salt. But a true flat 6 Porsche sound is typically always blended banks.
We have also found in our testing that aftermarket headers tend to lose power. EMAP gets higher and puts pressure on the wrong side of the turbo. We have actually installed aftermarket EMAP sensors on headers for testing to confirm our findings. The OEM doublewalled and port-matched headers from Porsche work fantastic, and there is no reason to change them out, even with upgraded turbos. Perhaps in the future an aftermarket solution will come out that lowers EMAP and gives better power, but for now we recommend to stick with stock headers.
-Charles@M
The following users liked this post:
Fullyield (02-16-2023)
07-24-2023, 10:35 AM
#68
We have also found in our testing that aftermarket headers tend to lose power. EMAP gets higher and puts pressure on the wrong side of the turbo. We have actually installed aftermarket EMAP sensors on headers for testing to confirm our findings. The OEM doublewalled and port-matched headers from Porsche work fantastic, and there is no reason to change them out, even with upgraded turbos. Perhaps in the future an aftermarket solution will come out that lowers EMAP and gives better power, but for now we recommend to stick with stock headers.
-Charles@M
I’ve read your team mentioning this before. I’ve also seen other well studied brands that happen offer headers, also claim that modern Porsche headers are difficult to beat in terms of extracting power. Of course, that is not mentioned in the advertisement for their headers for obvious reasons. I have done quite a bit of research on tunes for and modifications for the 992. Your team seems to have done their homework and cross referenced it with other brands. I have a Carrera T build that just locked and plan to have a few parts waiting for installation before the car arrives. Your ECU tune is at the top of that list, but what’s your opinion on high-flo cats, Plenum, and air filters (filters only because I’m ordering wheels and the tech will have the rear end torn apart anyway)? Of course, a tune would be immediately downloaded after the parts are installed. Also, do you recommend a 500 mile break-in before bolt-ons and ECU tune?
The goal is added reliable power, increased sound with minimal drone or smell, and OEM like drivability when driven in a calm manner.
Thanks,
Emil
Last edited by TEST DRyVer; 07-24-2023 at 10:36 AM. Reason: Added info