Recent discussions elsewhere on this forum have focussed on video clip spy shots of 718 GT4 and Spyder mules circulating various tracks during development testing. The various test mules have been shown fitted with both central and widely spaced exhaust tailpipe exits. Subsequently much controversy has ensued as to the influence of the exhaust tailpipe exits and the sound emanating from them. Whether the central exhaust exits are exclusive to the flat-4 turbo, and the spaced out exhaust exits apply only to the flat-6 is a moot point indeed.
With this in mind, I thought it would be helpful to post my past experience of an exhaust tailpipe modification which I applied to my 2010 987.2 Cayman S. Following an advert on the USA Planet-9 Cayman website, I purchased a Dream 2 Velocity Exhaust Twin Tailpipe from the company of the same name owned by Jim Love. From memory it cost around £200 including shipping and import taxes to the UK. According to the advert blurb, the Dream 2 tailpipe, greatly improved the exhaust gas flow at exit point from the mufflers on the 987.2 DFI Cayman and Boxster. This was achieved by fabricating a more rounded flow-efficient route for the exhaust gasses after leaving the mufflers. On the stock twin tailpipe, there is a marked conflict of exhaust gasses meeting head-on from each muffler before being forced by back pressure through 90 degrees to the exhaust exit. The advert blurb also claimed a much improved exhaust note and greatly reduced gas-flow back pressure at exit point.
The Dream 2 tailpipe was made of a very solid steel construction with larger diameter twin pipes. The unit was not chrome plated nor corrosion protected in any way. Fitting instructions were included and I had the job done by a local garage workshop. I made the decision to take my chances with my new car warranty and fit the modified tailpipe.
The results were amazing. I could hardly believe the difference this made to the sound of my 987.2 Cayman S. Gone was the tinny rattle of the standard chromed twin tailpipes. Now, when I blipped the throttle, the exhaust note was deeper, more rorty, and had a delightful burble on the overrun. On two separate occasions, one while participating in a charity supercar event, and the other while boarding the Eurostar Channel Shuttle on my way to France, people already familiar with the sound of a flat-6 Porsche, approached me and remarked they had never before heard a Cayman sound quite so delicious.
The point of this post is to maybe shed some light on the impact of exhaust tailpipe exists on exhaust gas harmonics. I am not an acoustic expert, but I cannot help but wonder if during the months of track testing development mules with various engine and exhaust configurations, Porsche R&D engineers have experimented with improving the exhaust sound of the flat-4 turbo engine. During my Stuttgart factory visit last September, I did manage to extract confirmation from the very knowledgable tour guide, that Porsche R&D were currently testing both flat-4 turbo and flat-6 normally aspirated engines for a future model in the Cayman and Boxster range.
It could be therefore, that the position of the exhaust tailpipes and the sound emanating from them on Porsche test mules, gives no guarantee as to the type of engine fitted.
I shall leave it there for others to pick up, as I am sure will happen.
For your interest, the photo below shows the Dream 2 Velocity twin tailpipe which was a very successful modification to my 987.2 CS. After 10,000 miles of UK and Europe driving the lack of corrosion protection began to take its toll. It was removed from my car prior to sale.
Brian
With this in mind, I thought it would be helpful to post my past experience of an exhaust tailpipe modification which I applied to my 2010 987.2 Cayman S. Following an advert on the USA Planet-9 Cayman website, I purchased a Dream 2 Velocity Exhaust Twin Tailpipe from the company of the same name owned by Jim Love. From memory it cost around £200 including shipping and import taxes to the UK. According to the advert blurb, the Dream 2 tailpipe, greatly improved the exhaust gas flow at exit point from the mufflers on the 987.2 DFI Cayman and Boxster. This was achieved by fabricating a more rounded flow-efficient route for the exhaust gasses after leaving the mufflers. On the stock twin tailpipe, there is a marked conflict of exhaust gasses meeting head-on from each muffler before being forced by back pressure through 90 degrees to the exhaust exit. The advert blurb also claimed a much improved exhaust note and greatly reduced gas-flow back pressure at exit point.
The Dream 2 tailpipe was made of a very solid steel construction with larger diameter twin pipes. The unit was not chrome plated nor corrosion protected in any way. Fitting instructions were included and I had the job done by a local garage workshop. I made the decision to take my chances with my new car warranty and fit the modified tailpipe.
The results were amazing. I could hardly believe the difference this made to the sound of my 987.2 Cayman S. Gone was the tinny rattle of the standard chromed twin tailpipes. Now, when I blipped the throttle, the exhaust note was deeper, more rorty, and had a delightful burble on the overrun. On two separate occasions, one while participating in a charity supercar event, and the other while boarding the Eurostar Channel Shuttle on my way to France, people already familiar with the sound of a flat-6 Porsche, approached me and remarked they had never before heard a Cayman sound quite so delicious.
The point of this post is to maybe shed some light on the impact of exhaust tailpipe exists on exhaust gas harmonics. I am not an acoustic expert, but I cannot help but wonder if during the months of track testing development mules with various engine and exhaust configurations, Porsche R&D engineers have experimented with improving the exhaust sound of the flat-4 turbo engine. During my Stuttgart factory visit last September, I did manage to extract confirmation from the very knowledgable tour guide, that Porsche R&D were currently testing both flat-4 turbo and flat-6 normally aspirated engines for a future model in the Cayman and Boxster range.
It could be therefore, that the position of the exhaust tailpipes and the sound emanating from them on Porsche test mules, gives no guarantee as to the type of engine fitted.
I shall leave it there for others to pick up, as I am sure will happen.
For your interest, the photo below shows the Dream 2 Velocity twin tailpipe which was a very successful modification to my 987.2 CS. After 10,000 miles of UK and Europe driving the lack of corrosion protection began to take its toll. It was removed from my car prior to sale.
Brian
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