993 Sport cat X-pipe
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Fabspeed Motorsport (05-25-2023)
05-24-2023, 05:54 PM
#152
I would order a non-catted x-pipe, but with one requirement: no window at the center of the X that mixes the exhaust pulses from the two banks. I would think this should be possible. Mixing the banks on a 911 engine (to my knowledge) is not ideal, and the factory did not do so either (the 993 cat has an internal wall in the center, for example, keeping the flow from the two banks separate).
05-24-2023, 07:03 PM
#153
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Mr. Churchill- I’m very sure the Bischoff cats have a window connecting the left and right banks. Gillet cats are non-communicating.
I would order a non-catted x-pipe, but with one requirement: no window at the center of the X that mixes the exhaust pulses from the two banks. I would think this should be possible. Mixing the banks on a 911 engine (to my knowledge) is not ideal, and the factory did not do so either (the 993 cat has an internal wall in the center, for example, keeping the flow from the two banks separate).
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Churchill (05-25-2023)
05-24-2023, 11:09 PM
#154
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Hey all, I was chatting with John today and he said they'd do another group buy if I could get minimum 8 people. @Fabspeed Motorsport
Anyone else want in?
Anyone else want in?
How much would it be compared to the 10% off being offered now?
05-25-2023, 10:30 AM
#155
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I would order a non-catted x-pipe, but with one requirement: no window at the center of the X that mixes the exhaust pulses from the two banks. I would think this should be possible. Mixing the banks on a 911 engine (to my knowledge) is not ideal, and the factory did not do so either (the 993 cat has an internal wall in the center, for example, keeping the flow from the two banks separate).
Hey Churchill!
Fantastic question, mixing the banks actually allows for increased scavenging. This forces your exhaust flow to accelerate, improving tone and HP.
Check out this video demonstration!
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coreseller (05-25-2023)
05-25-2023, 12:20 PM
#156
05-27-2023, 10:57 AM
#158
OBD1 which is US '95 and RoW all n/a use a single O sensor in a central mixing chamber.
OBD2 is all turbo and all US '96 up, monitor the left/right separately and also pre/post cat, there is no mixing so that they can more closely monitor and identify each separate combustion event.
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Churchill (05-27-2023)
05-30-2023, 03:53 PM
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Hey Guys,
Just wanted to chime in with some more details regarding the group buy.
We will offer 10% off to the first 8 customers committed to purchasing the Sport Cat X-pipe. If we are able to surpass 8, I will bump that discount for all to 15% off MSRP!
10% = $1,796.35
15%= $ 1,696.56
1) @svpreme
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Just wanted to chime in with some more details regarding the group buy.
We will offer 10% off to the first 8 customers committed to purchasing the Sport Cat X-pipe. If we are able to surpass 8, I will bump that discount for all to 15% off MSRP!
10% = $1,796.35
15%= $ 1,696.56
1) @svpreme
2)
3)
4)
5)
6)
7)
8)
07-07-2023, 06:24 PM
#165
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