Turbo Exhaust Options

[diabloam]

Hey all, my last drive before Ihad to go to work ended up with a scrapping from rear. Pulled over to find my tail pipe had fallen to ground, kicked it off and drove home. Imagine the backbox is probably bit rotten also although havent looked.

My prefered option would be a big old 3" complete stainless system, along lines of the fabspeed one from states, JMgarages one or Wortech, however have just bought a house and I really ought to be buying some furniture rather than spending a grand or so on an exhaust, much as I would like to, lol!

So I could get my tail pipe welded backon for time being, get a cheaper complete system or just buy a backbox for the time being. Whats the general thinking on here for such things, what does everybody recommend, whats everybody running. All advice greatly appreciated, thanks all in advance.

 

[chrisg]

Hiya

sorry to hear about your issues ! Let me guess, the original rusted through between the pipe and the front of the back box just where there is no hanger or support ?

This seems to be a classic place for them to rust through/ break.

I can only speak from my experience, but for the last few years, I've been running standard manifold, centre pipe(s) etc with a Dansk stainless steel item as the back box. Seems to work fine and is growly sounding without being over intrusive on long journeys.

I was fortunate enough to get it 2nd hand, albeit unused from e-bay. The only comment I would make is that the flanges didn't match perfectly so required some 'adjustment' to the new back box with a drill and rat tail file.

Yours

Chris

 

[Suffolk944]

Previously I ran an ESS/Janspeed back box and then later added their mid pipe and was always very happy with it. Its a bit more expensive than some IIRC but very nicely made. Dansk and others all have plenty of satisfied customers too so I would say whichever you go for you shoudl be happy with it - From memory the standard Porsche replacement exhaust parts are just as much or even more than the Stainless Steel alternatives.

 

[MarkK]

If ordering from America is a worry because of time, Joey from fabspeed got me my exhaust in 3-4 days door to door,the quality is amazing..

 

[homesea]

Whats the noise like on the Fabspeed?
I have the same problem as diabloam but my tailpipe is held on with a pipe clamp!

I will be using the car for track-days so would like to know if the Fabspeed meets noise regs at tracks.

I was just going to buy a Dansk back box.

 

[DavidL]

Mark,
What did you get from Fabspeed and what were the shipping costs?
Their 3" system is looking very tempting..

 

[cole.bin]

I'm using a Wortec PowerPac 3" exhaust from Promax.
+ve Sounds good. Not too loud. Oulton Park static test 0.5M from exhaust showed 97 dB(a) at 4800 rpm.
Advertised at +11bhp & +12ftlb. Dyno power was healthy but as it was already on the car when I bought it I do not know how much it contributed.
-ve You lose a little bit of ground clearance

 

[sulzeruk]

One thing I have noticed is that the diameter of the Dansk stainless back box section is smaller by 1/4 of an inch than the OEM back box. Can't be very good for performance!
Alasdair

 

[MarkK]

I have the three inch rear section on my racecar,it would easily pass on quiet track days,not loud at all,the shipping costs were not bad either 60 dollars??Joey from Fabspeed is super helpful and he gave me the copper gaskets needed to fit as a gesture,plus if you pay on a card the dollar rate is not great but not bad either about 1.59.What amazed me was the speed with which it came.Very proffesional and quick service I thought.The exhaust is like a mirror I kid you not.

 

[MarkK]

I fitted the Fabspeed because the Dansk one I had fitted was whistling pushing the exhaust gas out the rear end on my racecar,it sounded restrictive,the original Porsche item does not sound like that at all...

 

[NeilW]

I found the Dansk unit had to be 'made' to fit using a mallet. From memory, it didn't clear the thicker anti-roll bar of the TurboS (this was MarkK's car).

 

[u63af]

David,
Maybe consider getting a custom made one. There is a company near me that quoted £450 to do a 3" turbo back system with a lifetime guarantee. They have done a lot of stuff with race cars etc. There might be someone near you that does it.

 

[poprock]

I got a similar deal from Stainless Creations in Falkirk. Cheaper than that, even. 3" back section and it makes just enough difference to the car's sound; deeper and throatier without being louder.

Having a custom build avoids shipping time/cost and avoids the notorious issue of hammering your brand new pipes to fit around the anti-roll bar.

I herd the same "˜whistling' criticism of the Dansk back boxes from three or four different people when I was doing research before buying.

 

[homesea]

I've been thinking about this again and found a link to Hayward and Scott, they sell a 3" to 2.5" system with any shape tail pipe you like!

http://www.haywardandscott.com/porsche/944/944-turbo-back-box-and-front-pipe.html

Anyone have one fitted?
Do you think the 2.5" backbox would harm the performance?

 

[944Turbo]

Another vote for the ESS one from me

http://www.essentialstyling.com/exhausts.htm

Developed on a dyno and good sound but not too loud.
Tony

 

[Diver944]

ORIGINAL: homesea

found a link to Hayward and Scott, they sell a 3" to 2.5" system with any shape tail pipe you like!

Fen had one, Nick_968 has one and Martyn Cockram the old Register Secretary had one and I believe they were all happy.

However I've never understood why they make a 3" front pipe and a 2.5" rear box for the 944T ???? [&:] It seems to defy all logic about what we know concerning Turbo systems in that they should get bigger as they get furtehr from the Turbo. Indeed the standard pipe is 2.5" anyway so what do you gain?

 

[DavidL]

Can someone confirm a few issues for me so I don't look a complete egit as I go looking for an exhaust.

Assuming mine is standard for a 90T - which bit from manifold down is how wide and made of what?
I'm assuming I have a cat so I'd like to remove it but will I have any emissions issues as it is a road car only.

My local exhaust manufacturer can't bend 3" pipe so can't help apparently.

And what's a turbo discharge pipe that JM mentions in his list and why is it so much more?

Ta
David

 

[Eldavo]

There's a place in Newcastle upon Tyne called AAS Exhausts, I was in there earlier asking about something unrelated. They know their 944s and have made exhausts for cup racers in the past the owner was telling me. I had to ask the price and was pleasantly suprised when he told me it would be £450 fitted for a custom stainless exhaust. That goes from the downpipe back to the tip, that was for a N/A but would imagine the turbo price to be the same/similar.

 

[barks944]

What do people think about the effects of the downpipe on the 951. Its the smallest part of the exhaust apparently not much more than 2" in places... Seems like to get real benefit from an exhaust system you would want to replace the downpipe more than any other section...

 

[GPF]

ORIGINAL: Diver944

ORIGINAL: homesea

found a link to Hayward and Scott, they sell a 3" to 2.5" system with any shape tail pipe you like!

Fen had one, Nick_968 has one and Martyn Cockram the old Register Secretary had one and I believe they were all happy.

However I've never understood why they make a 3" front pipe and a 2.5" rear box for the 944T ???? [&:] It seems to defy all logic about what we know concerning Turbo systems in that they should get bigger as they get furtehr from the Turbo. Indeed the standard pipe is 2.5" anyway so what do you gain?

I have had their rear section for some time and it sounds great. Just ordered their centre section and also getting them to make a 3" downpipe. As for the 2.5" rear section, the exhaust gasses cool as they travel down the exaust under the car and take up less volume so the taper down to 2.5" is there to keep the gas speed up. They reckon you are better with 3" if you are well over 400 bhp, but below that it would hurt your midrange without adding any top end.