SPB Muffler that will meet LRP Sound Requirements
#1
Rennlist Member
Thread Starter
SPB Muffler that will meet LRP Sound Requirements
I have done a search and found a few muffler systems for the SPB, but I am looking for one that has been run at Lime Rock and has not had an issue with their sound limits. I am looking for either a prefab system or a set of mufflers that I can have welded up into a system.
Thanks in advance for your help.
Aaron
Thanks in advance for your help.
Aaron
#2
Rennlist Member
I have done a search and found a few muffler systems for the SPB, but I am looking for one that has been run at Lime Rock and has not had an issue with their sound limits. I am looking for either a prefab system or a set of mufflers that I can have welded up into a system.
Thanks in advance for your help.
Aaron
Thanks in advance for your help.
Aaron
#3
Nordschleife Master
The setup that I built is very quiet, almost too quiet when I'm in traffic. Just a set of turbo mufflers from Summit ($27 each) and tubing that I cut and welded.
https://photos.app.goo.gl/1xnGwH6LmDj6EX5Z6
https://photos.app.goo.gl/1xnGwH6LmDj6EX5Z6
#5
Nordschleife Master
Here you go.
JEX-ATT12S-3
Muffler, Turbo Tube, 2 in. Inlet/Outlet, Steel, Aluminized, 18 in. Length, Each
WLK-47972
Exhaust Tubing, Straight, 2.000 in. Diameter, 7.5 ft. Length, 15-Gauge, Steel, Aluminized, Each
JEX-ATT12S-3
Muffler, Turbo Tube, 2 in. Inlet/Outlet, Steel, Aluminized, 18 in. Length, Each
WLK-47972
Exhaust Tubing, Straight, 2.000 in. Diameter, 7.5 ft. Length, 15-Gauge, Steel, Aluminized, Each
#7
Rennlist Member
Thread Starter
Here you go.
JEX-ATT12S-3
Muffler, Turbo Tube, 2 in. Inlet/Outlet, Steel, Aluminized, 18 in. Length, Each
WLK-47972
Exhaust Tubing, Straight, 2.000 in. Diameter, 7.5 ft. Length, 15-Gauge, Steel, Aluminized, Each
JEX-ATT12S-3
Muffler, Turbo Tube, 2 in. Inlet/Outlet, Steel, Aluminized, 18 in. Length, Each
WLK-47972
Exhaust Tubing, Straight, 2.000 in. Diameter, 7.5 ft. Length, 15-Gauge, Steel, Aluminized, Each
Trending Topics
#8
Rennlist Member
Thread Starter
Gary you very well may be right, but I have most of the winter to figure it out. I will be talking with Bela and Dan Jacobs to see what options they have. As you said, stock exhaust have not passed sound at Lime Rock.
#9
Nordschleife Master
Not sure if this link will work, but try. First car is my SPB running the exhaust. Compare to the street cars which follow.
Edit: Link won't work from here. Will try to find a solution.
Edit: Link won't work from here. Will try to find a solution.
#10
Rennlist Member
This winter Im installing in my '98 a eBay Top Speed with a short motorcycle baffle in one of the inlets to help the drone these mufflers are known to have. Im keeping the stock single-pair of cats for now until I can get a db reading in the spring at LRP. Will remove cats if Im well above the 88db, doubtful though.
Nice simple set up Lemming, love it. To be clear, have you run this at Lime Rock and it passed sound? Or have a db reading of it from somewhere else. Thanks
The setup that I built is very quiet, almost too quiet when I'm in traffic. Just a set of turbo mufflers from Summit ($27 each) and tubing that I cut and welded.
https://photos.app.goo.gl/1xnGwH6LmDj6EX5Z6
https://photos.app.goo.gl/1xnGwH6LmDj6EX5Z6
#12
Nordschleife Master
Hopefully this link will work. It shows my car WOT down the front straight at Barber followed by a few race cars as well as stock porsches. Take a listen, I'm not sure mine is any louder than the stock GT3s that follow.
https://www.youtube.com/watch?v=X0sE...ature=youtu.be
#15
Two years ago, after getting kicked out of Roebling for sound limits (straight exhaust), I spent $400 at a local muffler shop to have some small MagnaFlo resonators welded in. The results were excellent. But within two years, the welds had cracked and the stuffing in the resonators had worn out, and the system was leaking so badly, I could feel a definite reduction in power. So I bit the bullet and installed an expensive Fabspeed race exhaust...and that opened a whole new can of worms, as documented here.