LastMezger

There's lots of discussion of primary, secondary and cup bypasses but is there a "tuned" exhaust system for our cars? Something that sounds tight and racy (like a 997 GT3) as opposed to just loud and barking?

Regulatori

I always wondered this too. Something similar to a Tubi, Kreisseig, Meisterschaft, etc..

The Flying Dutchman

Tubi too loud. Tried it, since I liked the movies with all silencers and catalyst bypassed. In reality ( I like loud screaming Porsches) this was really to loud. The drone around 3k rpm gives immediate headache.

I tried different set-ups with bypassing primary and secondary silencer, and catalyst. In the end I liked bypassing secondary bypass (g-pipe) and a hollowed catalyst the best. Loud, but no drone. At full throttle real good sound (beast )

tbennett017

IMHO, the cup pipe (otherwise stock) fits that bill perfectly for me.

LastMezger

Anybody have a Fabspeed muffler/tip?

clutch-monkey

can't speak for just the muffler/tip, i've got a full fabspeed setup and whilst it's perfect for my use 90% of the time on long trips it's at just the wrong rpm and drones. a few rpm either way and it's fine though.

Makmov

Interesting question.

There is an art to making tuned exhaust. It has to do with the header pipe length and the sound wave length the engine makes at a desired rpm. Then you equalize it or make it harmonic at the collector and adjust it plus or minus until you have the desired effect you have tuned exhaust system.

The sound a tuned exhaust makes is really a by product.

I don't know if there has been anyone to figue it out, or if it's possible due to the short nature of a 911 header, and different applications are going to different tunning.

However, knowing Porsche they probably had some other scentific formula for a proper exhuast system.

vasculardoc

There was someone who had a Fabspeed exhaust on their car that did a video of a little blat around their car park - I think it was on you tube - at least you could hear the sound from outside.

Regulatori

I have the FVD dual tip race exhaust (no cat/no heat exchangers) and I don't think it's all that loud. Sometimes there is a certain RPM spot where it resonates but that's the worse of it. Going through tunnels is an absolute joy though.

clutch-monkey

not the best sound quality (phone camera) but this is a short clip with my fabspeed exhaust
http://www.youtube.com/watch?v=TX3jicn9X-w

boxsey911

I really like the sound of that when it gets moving

Steve Weiner-Rennsport Systems

Thats a real nice setup; nice sound, good power increase, and no droning in the cabin.

There are "tuned" systems that work very well on these cars, however these are intended for competition as they have no provisions for heat & defrost.

The Flying Dutchman

@Steve: thanks, to be honest I have to say I had an earlier reply of you on this forum in my thoughts, when I came up with my final exhaust set-up.

Fly911

I have a Fabspeed RSR equal length header system, with a Y-pipe and one exhaust out in the middle (kind of like on a Boxster). THis sounds like a GT3 Cup car, especially on high rpm. But it's VERY, VERY loud!

boxsey911

Now that you've teased us we need a sound clip!