Any 3 inch exhausts in development?
 

I know that most aftermarket companies are sticking close to the stock exhaust diameter or only stepping it up slightly, but are still producing decent results. I'm wondering if there is anyone that is developing a 3 inch catback exhaust or has messed around with that size piping yet.

Reason being is for years in the S2000 community there had been many people sticking to the theory of backpressure being needed to help with torque causing the aftermarket to stick with smaller diameter piping. More recently as the popularity of turbo kits started rising so did the aftermarkets exhaust piping diameters. Some people tried using the bigger piping exhaust on their NA cars and found that they gained power througout the entire powerband. It is well known that the F20/F22 flows very well, and I'm assuming that the FA20 would be pretty similar especially being alot newer.

Are there any manufacturers that might consider the possibility of an NA 3-inch catback exhaust?

I have a lightweight 3" Exhaust System!

So what's the verdict on the back-pressure theory?

Basically it has dispelled the "NA cars need smaller piping" myth. These are threads from just the s2000 and honda tech forums documenting no loss in power and gains throughout the entire rev range with the larger diameter piping. In fact it is now quite common in the K-series world to see 3 inch exhausts on NA setups. Here's some threads for reference.
http://www.s2ki.com/s2000/topic/8960...-inch-exhaust/
http://www.s2ki.com/s2000/topic/8132...-dynos-inside/
http://honda-tech.com/showthread.php?t=2341715
http://forums.clubrsx.com/showthread...ghlight=3+Inch

I'm very curious for results around here, especially since it is a very new platform. Just figured I'd throw out some food for thought:party0030:

Don@accelerated: Were you able to dyno your 3-inch exhaust compared to other piping diameters? If so do you have any dyno plots? Do you have any pictures of the setup as well?

Still waiting on specs of this thing. Dyno? It looks mean...

I saw that earlier when I was browsing, looks and sounds awesome! Patiently awaiting dyno results ;)

:) I know I know..... I promise this week for sure. Small hiccup with getting our new dyno up and running but it's all good now.

Thanks for the interest.

- Billy

I have a 3inch exhaust on my 1.8 B18c5. I have 13:5 comp. Totally didn't under produce power with it. 2+ Liter K series engines LOVE 3inch piping.

I've done a 3" 316L system with 3 straight through magnaflow mufflers and hks burnt muffler tips for my turbo setup. Will be jigging it soon for production.

We will eventually have at least two exhaust systems to choose from, 3" being one of them. We designed and built it at the same time as the 2.5" system. Noise levels and price tell us the 2.5" one will be more popular so it will be available first then we'll move to the 3".

How much more noise does it generate?

It would be hard to have a 3" system without a turbo that would be in the legal noise range. I would imagine hp would be lower than running a 2.5" system without turbo application.

What makes you think that hp would be lower? Just out of curiosity.

Less exhaust velocity, naturally aspirated engines need the correct balance of exhaust velocity and back pressure, higher velocity will actually help to pull (scavenge) the exhaust has out of the cylinder.

Im running a 3" Front pipe, mid-pipe and dual exhaust... Im loving it :) no dynos yet

Dude you can't say this and not post pics of it all.

please post it up on our aus section when completed . thanks

Here you go :)

http://i1102.photobucket.com/albums/...0395162945.jpg
http://i1102.photobucket.com/albums/...69911374_o.jpg

Any progress on the 3" exhaust?

Nameless has a 3" DP/OP they just tested. I've got their 3" Axleback on the way soon and hopefully a 3" resonated midpipe. Loud? Probably. Care? Nope. Already turbo ready when I want to later.

Ptuning is coming out with their exhaust system in a few weeks

Sent from my SGH-T889 using Tapatalk 2

any idea how much it would be compared to the 2.5 I have?
different design?
how much louder?
gains?
so many questions :happy0180:

any updates on the 3" exhaust? possible release date etc.

Update? It's in the works, you will see more info coming this spring. :thumbup:

We will be releasing our 3" exhaust pretty soon.

http://www.ptuning.com/graphics/ptun...ottom-view.jpg

bump! need full 3 inch exhaust from downpipe.

I think the forthcoming Cosworth system is 3" throughout

Here's our PTUNING 3" T304 Stainless Steel Turbo-Back Dual Exhaust System:

http://www.ptuning.com/subdir/itemde...ModelDesc=FR-S

nice one!

Well this isn't a production build, but it's a titanium 3" custom one off that's going on my car hopefully. Not complete yet but hopefully with in the next month or two.

http://farm8.staticflickr.com/7376/1...a0a4387a_c.jpg

http://farm3.staticflickr.com/2894/1...730917ff_c.jpg

http://farm3.staticflickr.com/2878/1...9d7092d3_c.jpg

http://farm6.staticflickr.com/5525/1...97aa80de_c.jpg

^^ That's a beautiful exhaust. A friend of mine has asked to build a titanium exhaust for my car.
@ptuning - Any sound clips?

Do it. It's super light and no worries about corrosion. :thumbsup:

Here's a few:

[ame="http://www.youtube.com/watch?v=9e0rJ90myR8&list=PL42057B14050EEA6B"]PTUNING FR-S/BRZ Dual Exhaust System - YouTube[/ame]


[ame="http://www.youtube.com/watch?v=VMdOy2nPe_s&list=PL42057B14050EEA6B"]PTUNING FRS BRZ DS-333 3" Turbo back Dual Muffler Exhaust System - YouTube[/ame]

whoa this sounds like an exotic car! very nice!!! :thumbup:

[ame="https://www.youtube.com/watch?v=FmNolu_ZUpk&t=75"]Najtańszy sposób na sportowy wydech! | The cheapest racing exhaust in the world - YouTube[/ame]

^^ :lol:

We just released our full 3" headerback, you can find it here:

http://shop.namelessperformance.com/...-back-exhaust/

-Ryan @ Nameless

after this testing time .... They think that putting an exhaust pipe 3 "unused turbocharger. Losing power at low rpm?