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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.
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
Talk to Bela at European Performance Specialists (EPS) in Watertown, CT. He does a lot of custom stuff for Spec Box race cars, mine was a bolt on (one clamp and one support bolt, 5 minute job) Burns muffler addition to the straight pipe the came out the center rear. Limerock is always a crap shoot, i've seen bone stock cars fail sound there..
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.
I highly doubt those will pass Limerock sound, but you never know..
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.
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.
Originally Posted by Lemming
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.
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
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.
Tell that crazy German (Dan) I still love him! Man he knew how to set my 911 up, even made ME look good!
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
I'm frugal and like to make my own parts when possible. When the OP started this thread I assumed that he meant race weekend, and compared to PCA race video of SPB cars at Limerock, mine is quiet. I have not been to Limerock and see later in this thread that DE weekends are 88db, not sure mine will make that, but it's not that far off (downturns?). At Barber my car was in the low '90s the only time I asked. I'll be there on Sunday, I can try to get another reading.
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.
Good reference video Tim, comparitively pretty "quiet" and with no cats as well. Yes, that would be great if you got another reading. Thanks for the info
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.
12-07-2018, 10:01 AM
SPB Muffler that will meet LRP Sound Requirements
