996tt Speedtech 2.5 quiet exhaust 1st thoughts
Discussion
hi folks,
I finally took the plunge and fitted the 100cell speedtech exhaust to the 996tt manual.
I spent hours searching forums, PMing owners, and listening to youtube vids of exhaust noises - all part of the quest to fix the only aspect of the car thats not perfect for me. perhaps these thoughts could be helpful to other owners also contemplating the plunge. The car is totally standard except a 997 short shift kit (if you havent yet - get one of those before the exhaust! bang for buck is very high!)
The product: it took 6 weeks to arrive. customs payment was a stinger. customer service from speedtech was excellent. gt-one fitted it and encountered zero problems (very rare they said). it is very well made and lightweight. No cel issues.
s
Performance: i really wasn't expecting much gain on such an already powerful car (and my objective was 'soul through noise' rather than power. I am pretty shocked at how much more responsive and agressive the car is. It really adds a savage edge to the acceleration. The slight delay in pick up when pressing the accelerator out of a tight bend (for example) has all but gone. Downshift rev blips are now much better. It feels like the car has been fitted with a lightweight flywheel!
Noise: my comparison points here are 987s, s2000, 997s. Low speed burbling - much better - 9964s like. Full throttle (windows down) - there is now a tuned boxer engine noise along side the mad Dyson noise- it sounds like a porsche! People have mentioned 'gt3 like' - and its not as glorious as that. But its a good effort. and it does sound very scary when you hear a noise reflection from a wall or tunnel! and just so much more engaging than the standard noise. with windows up the noise is also much more pleasing, although still not as good as the 987s with the roof up.
Drone and boom: the note is bassier and louder that stock, but surpisingly well mannered at idle and when under mild throttle. The gt-one guys actually called to flag there concerns as i had the 'baby on board' sign in the back (its our family car!) and they were concerned - but they called me as soon as they test drove it to say it was much quieter than they thought it would be and 'sounded nice'. (nb ive used gt-one for years now and cant rate them highly enough). There is drone between 2k and 3k. This exhaust is reported to be the least droney of them all but it is very noticable. That said, we quickly learned to drive 'around it' - selecting slightly different gears for low and motorway cruising. 6 month old archie slept very well on a return 3 hr trip at the weekend. The mrs is ok with it. the benefits hugely outweigh the drone bother for me. But it would be better if it wasnt there.
in summary - its quite a lot of money to do this. the solution isnt 100% perfect. but it has brought a whole heap of soul to the car and delivered performance improvements that have really surpised me.
happy to answer any qs, and i hope this is of some help to some 996tt folk.
I finally took the plunge and fitted the 100cell speedtech exhaust to the 996tt manual.
I spent hours searching forums, PMing owners, and listening to youtube vids of exhaust noises - all part of the quest to fix the only aspect of the car thats not perfect for me. perhaps these thoughts could be helpful to other owners also contemplating the plunge. The car is totally standard except a 997 short shift kit (if you havent yet - get one of those before the exhaust! bang for buck is very high!)
The product: it took 6 weeks to arrive. customs payment was a stinger. customer service from speedtech was excellent. gt-one fitted it and encountered zero problems (very rare they said). it is very well made and lightweight. No cel issues.
s
Performance: i really wasn't expecting much gain on such an already powerful car (and my objective was 'soul through noise' rather than power. I am pretty shocked at how much more responsive and agressive the car is. It really adds a savage edge to the acceleration. The slight delay in pick up when pressing the accelerator out of a tight bend (for example) has all but gone. Downshift rev blips are now much better. It feels like the car has been fitted with a lightweight flywheel!
Noise: my comparison points here are 987s, s2000, 997s. Low speed burbling - much better - 9964s like. Full throttle (windows down) - there is now a tuned boxer engine noise along side the mad Dyson noise- it sounds like a porsche! People have mentioned 'gt3 like' - and its not as glorious as that. But its a good effort. and it does sound very scary when you hear a noise reflection from a wall or tunnel! and just so much more engaging than the standard noise. with windows up the noise is also much more pleasing, although still not as good as the 987s with the roof up.
Drone and boom: the note is bassier and louder that stock, but surpisingly well mannered at idle and when under mild throttle. The gt-one guys actually called to flag there concerns as i had the 'baby on board' sign in the back (its our family car!) and they were concerned - but they called me as soon as they test drove it to say it was much quieter than they thought it would be and 'sounded nice'. (nb ive used gt-one for years now and cant rate them highly enough). There is drone between 2k and 3k. This exhaust is reported to be the least droney of them all but it is very noticable. That said, we quickly learned to drive 'around it' - selecting slightly different gears for low and motorway cruising. 6 month old archie slept very well on a return 3 hr trip at the weekend. The mrs is ok with it. the benefits hugely outweigh the drone bother for me. But it would be better if it wasnt there.
in summary - its quite a lot of money to do this. the solution isnt 100% perfect. but it has brought a whole heap of soul to the car and delivered performance improvements that have really surpised me.
happy to answer any qs, and i hope this is of some help to some 996tt folk.
interesting, i find my gt2 996 sometimes lacks that sound you talk about.
is this it? http://www.softronicsoftware.com/porsche-996-tt-gt...
is this it? http://www.softronicsoftware.com/porsche-996-tt-gt...
Edited by Xps911 on Wednesday 14th May 11:13
thats the fella but they are made by these guys http://www.speedtechexhausts.com/
check the testimonials - very good reviews - you can see the full threads on rennlist ect and it felt like a safe choice by the time decided to do it
the ss was the 997 oem item on here http://www.porscheshop.co.uk/acatalog/porsche_997_...
i also fitted one to my 987s and it made a huge difference to the driving pleasure - its a critical touchpoint between man and machine and the increased precision in feel finally does the rest of the controls and engineering justice
cheers,
james
check the testimonials - very good reviews - you can see the full threads on rennlist ect and it felt like a safe choice by the time decided to do it
the ss was the 997 oem item on here http://www.porscheshop.co.uk/acatalog/porsche_997_...
i also fitted one to my 987s and it made a huge difference to the driving pleasure - its a critical touchpoint between man and machine and the increased precision in feel finally does the rest of the controls and engineering justice
cheers,
james
Good choice James. Sorry we weren't able to meet up during the selection process, but it sounds like you got to hear one eventually - your own!
I'm another happy Speedtech customer, with the same 100 cell / 2.5" version. The only thing I'm still on the fence about is the round Speedtech tips. They don't fill the bumper cutouts so well, and look a bit odd from some directions, although they are beautifully made. I may get the adaptors at some point to re-fit my OEM tips.
Pete
I'm another happy Speedtech customer, with the same 100 cell / 2.5" version. The only thing I'm still on the fence about is the round Speedtech tips. They don't fill the bumper cutouts so well, and look a bit odd from some directions, although they are beautifully made. I may get the adaptors at some point to re-fit my OEM tips.
Pete
Hi Pete - i have the oem tip option - it would be really interesting to hear the difference sometime (would also love to sit in an x50!) - John said the sound was optimised for his 2.5 tips - but i really wanted the oem look.
Ill borrow a go pro and make some vids! very exciting!
Have to say that the exhaust is really growing on me every day - loads of great noises at different speeds and levels of throttle to play with! Good times!
Ill borrow a go pro and make some vids! very exciting!
Have to say that the exhaust is really growing on me every day - loads of great noises at different speeds and levels of throttle to play with! Good times!
Just to update I finally had my Speedtech 2.5" fitted by Jaz on Tuesday and did a round trip to Birmingham today.
The team at Jaz had no problems fitting the exhaust (courtesy of the previous owner of my car fitting stainless nuts to my turbo studs etc) and even the lambda sensors were all in a decent state to be reused which was good as I expected a couple to need replacing.
First impressions - there is drone and a bit of boom between 2-3k but the throttle response and sound of the turbos spooling is addictive and absolutely adds character to the car. As Lordjimimac mentioned it is as if a lighter flywheel has been fitted, heel and toe downshifts are a glorious blip away! The first full boost run onto the motorway with the windows open just made me laugh, the sound is a lot more aggressive and really gives the impression that a lot of air is being shifted through the turbos. Off boost but revving the engine you hear a lot more of the flat 6 than before but as soon as you put your foot down that is lost over the turbo roar. Turbo spool whistle is audible with the windows down around 2-3k gently accelerating which I like but is in no way intrusive.
A few mundane hours on the motorway today and the drone is at its worst at 70-75mph in 6th. Push up to 80 or drop to 60 and it is significantly quieter. I can see my wife getting annoyed if we had to sit in the drone zone for >30 mins but I am ok with it and can drive around it... I did previously own a decatted TVR Cerbera with sports exhaust though so my hearing is probably shot by now!
Also worth adding that I have had no CEL issues with the 100 cell cats on my remapped car which was also a concern.
For me the exhaust has definitely delivered in terms of performance improvement and more importantly giving the Turbo a more fitting soundtrack! The drone is a downside but is worth it for the benefits.
Lordjimimac - You now have me looking at 997 short shifters!
The team at Jaz had no problems fitting the exhaust (courtesy of the previous owner of my car fitting stainless nuts to my turbo studs etc) and even the lambda sensors were all in a decent state to be reused which was good as I expected a couple to need replacing.
First impressions - there is drone and a bit of boom between 2-3k but the throttle response and sound of the turbos spooling is addictive and absolutely adds character to the car. As Lordjimimac mentioned it is as if a lighter flywheel has been fitted, heel and toe downshifts are a glorious blip away! The first full boost run onto the motorway with the windows open just made me laugh, the sound is a lot more aggressive and really gives the impression that a lot of air is being shifted through the turbos. Off boost but revving the engine you hear a lot more of the flat 6 than before but as soon as you put your foot down that is lost over the turbo roar. Turbo spool whistle is audible with the windows down around 2-3k gently accelerating which I like but is in no way intrusive.
A few mundane hours on the motorway today and the drone is at its worst at 70-75mph in 6th. Push up to 80 or drop to 60 and it is significantly quieter. I can see my wife getting annoyed if we had to sit in the drone zone for >30 mins but I am ok with it and can drive around it... I did previously own a decatted TVR Cerbera with sports exhaust though so my hearing is probably shot by now!
Also worth adding that I have had no CEL issues with the 100 cell cats on my remapped car which was also a concern.
For me the exhaust has definitely delivered in terms of performance improvement and more importantly giving the Turbo a more fitting soundtrack! The drone is a downside but is worth it for the benefits.
Lordjimimac - You now have me looking at 997 short shifters!
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