First drive in 991 Speedster
#93
Race Car
https://www.reuters.com/article/us-v...-idUSKCN1SD1BA
#94
Three Wheelin'
Thanks Pete, photos are terrific.
#95
Burning Brakes
I want this car - I love my Touring but good golly. I have wanted a Speedster desperately ever since the movie, The Freshman in 1990.
#98
Addict
Rennlist Member
Rennlist Member
To me it sounds like the entire exhaust system (and ITB intakes) has been redesigned as a system. I read somewhere that the new central (only) muffler has internal flaps and other electronically controlled internal functions to optimize the exhaust sound and (now broader) power/torque across the rev range. The current vacuum controlled exhaust valves are replaced by functions in this new fancy muffler.
So, I guess I'm saying the systems are apples and oranges. What works on one, won't necessarily provide the same result on the other...
Last edited by GrantG; 05-07-2019 at 04:11 PM.
#100
Thanks for the info, stout.
also, will the mesh be a part of all US Porsche vehicles or just the speedster for now?
also, will the mesh be a part of all US Porsche vehicles or just the speedster for now?
#101
Originally Posted by Jamie140
Only you can make that determination.
The 911 R MSRP was much better priced in my opinion and was more limited 991 as opposed to 1900 plus
#104
Rennlist Member
While many Rennlisters have reported good results with side muffler bypasses, I don't think it's quite a fair inference to make that because the Speedster has no side mufflers, we should delete them from our .2 GT3/RS cars because Porsche has decided they are redundant or useless going forward.
To me it sounds like the entire exhaust system (and ITB intakes) has been redesigned as a system. I read somewhere that the new central (only) muffler has internal flaps and other electronically controlled internal functions to optimize the exhaust sound and (now broader) power/torque across the rev range. The current vacuum controlled exhaust valves are replaced by functions in this new fancy muffler.
So, I guess I'm saying the systems are apples and oranges. What works on one, won't necessarily provide the same result on the other...
To me it sounds like the entire exhaust system (and ITB intakes) has been redesigned as a system. I read somewhere that the new central (only) muffler has internal flaps and other electronically controlled internal functions to optimize the exhaust sound and (now broader) power/torque across the rev range. The current vacuum controlled exhaust valves are replaced by functions in this new fancy muffler.
So, I guess I'm saying the systems are apples and oranges. What works on one, won't necessarily provide the same result on the other...
It seems that deleting the side mufflers (while keeping the valves) is (other than lightweight lithium battery) the best option to reduce significant weight in 991 GT cars without much of a downside. Let me know if I'm missing something.
#105
Burning Brakes