Soul Performance

Hey everyone! We've been approached to develop an exhaust for a 986 Spec Boxster and we're excited to produce and offer a solution to you all! We're focused on properly engineering a system that is durable and reliable.



We welcome your feedback as we go through the process to see if we can best meet your needs. Stay tuned for more updates.

-Mike

MJP911

It would be helpful if the exhaust could meet sound limit restrictions at tracks like Lime Rock.

Soul Performance

Thank you for your input!

-Mike

Soul Performance

Hey Marc,

It is my understanding that the Limerock race with PCA Club Racing is in April and is scheduled on an unmuffled day every year. The only benefit at that point of making a Limerock passable system would be to get seat time there before the event at DE days or the like. To make a system capable of passing Limerock's sound restrictions just to use at that track for practice (or for use outside of PCA Club Racing unmuffled race weekends) would add a significant amount of weight and restriction to the exhaust system. At that point it just makes more sense to throw the factory rear system back on the car temporarily until you can put the competition system back on. In attending a variety of Club Races this year and speaking with quite a number of shops and participants running SPB, this seems to be the accepted norm for those running Limerock. In asking all these folks what they want out of our development, they want it lightweight, simple, cost effective, and robust. That is what we're going after. After taking a peak under 20-30 of them every race weekend and seeing straight pipes coming out the back of almost every one of them...we're going to start with a straight piped version for the lightest and most cost effective option to the SPB guys, and then we'll likely add resonators as an option to "take the edge off" the sound in cabin for those that don't mind the extra cost and weight.

I've also had the 987.1 SPC, 987.2 GTB1, and 981 GTB2 (and other classes using these generation of cars) shops and participants chasing me for a rear system like what we are doing for the SPB with the same goals in mind. We've listened, and we're doing it. I have a 981 GTB2 that just arrived today, an 987.1 SPC arriving Sunday, and a 987.2 I-Class Boxster (Paul Solk's car) showing up in a couple weeks to knock out all those as well for the 2020 season. We were just announced by PCA Club Racing as the exclusive spec header replacement for the 987.1 SPC guys that are having all those factory header failures, and we're sponsoring PCA Club Racing for 2020. All of our stuff is going to come with a lifetime track warranty, and will be built to last and take the abuse with our strict no excuses no BS customer service policy. We look forward to doing more with PCA and our fellow track rats, and welcome more ideas and requests for product development

Best regards,
John Gaydos

orthojoe

Here in NorCal we would need an exhaust that is below 103dB.

bkovac

actually Laguna goes down to 93 db for the POC Porsche Owners Club races

Soul Performance

Not surprised to hear that. Laguna Limerock and Tremblant have been the worst sound restricted tracks to work around, Tremblant being the worst.

103dB isn't too hard to meet, of course depending on all the variables at play. Might be the resonated version with tundowns could make it but there are far too many variables at play with dB measuring to tell for sure even if we were to measure it here. What tracks are the SPB guys running in NorCal with a 103dB limit?

Regards,
John Gaydos

rastta

Both Sonoma Raceway and Thunderhill have 103db limits. As mentioned before - Laguna has both 90 and 93db days.

orthojoe

Laguna is complicated. Most DE days are 90db. Some 92db. For PCA races, I believe PCA buys days that are 103 or 105 db. I have yet to do a pca race, but will be starting next year. My spec miata has been destroyed too many times by other drivers.

Soul Performance

I would be doubtful any aftermarket muffler we can source or create into a rear system that deletes the cats in the midpipes, while staying reasonably priced, will meet 90-93db on a 97-99 SPB (which has no cats in the headers unlike the 2000-2004 cars). For these restricted dB events, I'm quite curious what setups people are using other than a stock system. Do you guys have any feedback on that? My initial thought would be factory headers, cat delete mid pipes, and factory rear muffler might pass the Laguna/Limerock events due to how restrictive on sound that factory muffler is, but before we invest in adding that to the R&D list I'd like to see if someone has tried it and what the results were.

Regards,
John Gaydos

rastta

Couldn't remember if it was 92 or 93 - regardless nothing I can to do my car, short of adding one of the crazy muffler contraptions, allows me to meet sound. The MOST they will allow is a 103 db day though - not 105. There are also some exemption days for professional racing I believe as well. I have no problem meeting sound at the other two tracks.

rastta

I've tried something like this and it didn't allow me to pass sound - my car is generally 97-98 db's.



I would need something more like this.

PGas32

John - what price point are you targeting, and how will the exhaust be mounted? I’m a notorious exhaust-cracker and am looking for something that will help eliminate mechanical DNF’s

C4 Pazzo

On the SPBs, cat bypass pipes plus stock muffler will make 92 dB at Laguna - maybe even 90 dB. For a race exhaust setup, it is critical to have some type of spring incorporated into the mount to the transmission - either hard rubber sleeves holding the hangers, or flexible/springy hangers. Otherwise, the exhaust welds or the header flanges will break, no matter how robust they appear.

The setup I use has cat bypass pipes that allow the stock muffler, straight pipes or lightweight race mufflers to be fitted between the bypass pipes and the stock mounting location. This has the advantage of keeping heat away from the transmission, and enabling quick swaps between the straight pipes and the race mufflers.

M_Weining

C4 Pazzo - great input and comments. Could you post some pictures of your set-up? Thx