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Location: The way to hell is paved by good intentions “Wenn ich Purist höre...entsichere ich meinen Browning” "Myths are fuel for marketing (and nowadays for flippers too,,,)" time to time is not sufficient to be a saint, you must be also an Hero
Different exhaust setup vs GT3 R. They used a variety of different mufflers during the Sebring and COTA tests, as well.
Manufacturers often want their new cars to be a bit quieter than the pack, as well.
GT3 R sounds very similar to my street car at high revs.
I have a couple questions:
- What is the decision to have a quieter car based on? To me it's far less appealing on a race car.
- Why is it that Porsche went from a megaphone exhaust on the 996 RSRs (one straight pipe coming off each cylinder bank) to a 2 into 1 setup on the unmuffled IMSA cars? Does it produce more power or does it have more back pressure so more torque? Is it because of the 991's large diffuser which wouldn't allow you to run a 996 type setup? If you were building a completed unrestricted RSR with no noise limitations what would the ideal setup be?
I got a look at the new RSR when they had the event at the LA auto show. I was probably the only goof on his hands and knees taking pics of the thing. I think they've gone back to more of the megaphone setup like the 996 RSRs had (ALMS version). However, it looks like they have small muffler canisters deeper in the body for the car. Not much, but that's what I'm taking those circular pieces to be.
- What is the decision to have a quieter car based on? To me it's far less appealing on a race car.
- Why is it that Porsche went from a megaphone exhaust on the 996 RSRs (one straight pipe coming off each cylinder bank) to a 2 into 1 setup on the unmuffled IMSA cars? Does it produce more power or does it have more back pressure so more torque? Is it because of the 991's large diffuser which wouldn't allow you to run a 996 type setup? If you were building a completed unrestricted RSR with no noise limitations what would the ideal setup be?
I got a look at the new RSR when they had the event at the LA auto show. I was probably the only goof on his hands and knees taking pics of the thing. I think they've gone back to more of the megaphone setup like the 996 RSRs had (ALMS version). However, it looks like they have small muffler canisters deeper in the body for the car. Not much, but that's what I'm taking those circular pieces to be.
I'll answer your questions as best I can:
The car is all new and features an all new engine, as well as a controversial - although ENTIRELY within the rules (ie, not necessitating a waiver from the FIA, ACO, or IMSA) - engine positioning. More than one person "in the know" has conveyed to me that it is common practice to keep a car relatively quiet in the season or two of competition. Less attention, but less appealing to me as a fan.
I am not an engine builder or exhaust expert, so I can't answer the second question.
Those are muffler canisters you see.
I have heard footage of the 2016 car vs. the 2017 car back to back (same day, same track, same driver, same camera) ... very big difference.
The car is all new and features an all new engine, as well as a controversial - although ENTIRELY within the rules (ie, not necessitating a waiver from the FIA, ACO, or IMSA) - engine positioning. More than one person "in the know" has conveyed to me that it is common practice to keep a car relatively quiet in the season or two of competition. Less attention, but less appealing to me as a fan.
I am not an engine builder or exhaust expert, so I can't answer the second question.
Those are muffler canisters you see.
I have heard footage of the 2016 car vs. the 2017 car back to back (same day, same track, same driver, same camera) ... very big difference.
Not sure if it's the mic, but the car sounded much louder during testing at Sebring (from the video). To add to that, if you notice during the test that the white car seems like it was louder then the black one.
Not sure if it's the mic, but the car sounded much louder during testing at Sebring (from the video). To add to that, if you notice during the test that the white car seems like it was louder then the black one.
I'm talking about non-public footage from the front straight at COTA.
The car is all new and features an all new engine, as well as a controversial - although ENTIRELY within the rules (ie, not necessitating a waiver from the FIA, ACO, or IMSA) - engine positioning. More than one person "in the know" has conveyed to me that it is common practice to keep a car relatively quiet in the season or two of competition. Less attention, but less appealing to me as a fan.
I am not an engine builder or exhaust expert, so I can't answer the second question.
Those are muffler canisters you see.
I have heard footage of the 2016 car vs. the 2017 car back to back (same day, same track, same driver, same camera) ... very big difference.
01-08-2017, 03:29 PM
2017 911 RSR Piston Heads Article
