944 turbo - rear exhaust section replacement advice/experience please

[944Turbo]

Could someone do me a big favour and measure the vertical and horizontal diameters of their OEM tail pipe chrome finisher?

I will get a new section welded to my otherwise good condition rear section of exhaust. i want to keep it all looking standard.

Paul

Vertical measuring straight up (ignoring the longer slash distance) is approx 75mm x width of approx 100mm on the outside, you could buy a standard tailpipe trim if you wanted to look completely standard and get exact measurements - mine came with a nice bag! (bought 2 as one was for a friend)

Tony

 

[944Turbo]

I quite like the black tail pipe

 

[944Turbo]

My other one fills the space better though in my opinion (think it is 6x9")

 

[blade7]

Is that a Janspeed?

 

[944Turbo]

Is that a Janspeed?

Strictly it is essential styling as they paid for the development, but it was built by Janspeed and as ESS no longer exist I believe Janspeed can still make you one - they still had to the jigs to do so a few years back.

During the development they built 2 versions, an initial noisy version with one box and then what was to be the trackday friendly version with 2 boxes, the 2 box system produced more power so that became the standard version. (there may also have been a straight pipe experiment). They were available with the big oval or twin rounds.

Tony

 

[blade7]

Is that a Janspeed?

Strictly it is essential styling as they paid for the development, but it was built by Janspeed and as ESS no longer exist I believe Janspeed can still make you one - they still had to the jigs to do so a few years back.

During the development they built 2 versions, an initial noisy version with one box and then what was to be the trackday friendly version with 2 boxes, the 2 box system produced more power so that became the standard version. (there may also have been a straight pipe experiment). They were available with the big oval or twin rounds.

Tony

Ben gave me the old twin silencer half system off of WUF. With no middle silencer it sounded like a tractor, and dropped mid range. I fitted baffles into the silencers and it sounds good now, and surprisingly the mid range came back.

 

[944Turbo]

Is that a Janspeed?

Strictly it is essential styling as they paid for the development, but it was built by Janspeed and as ESS no longer exist I believe Janspeed can still make you one - they still had to the jigs to do so a few years back.

During the development they built 2 versions, an initial noisy version with one box and then what was to be the trackday friendly version with 2 boxes, the 2 box system produced more power so that became the standard version. (there may also have been a straight pipe experiment). They were available with the big oval or twin rounds.

Tony

Ben gave me the old twin silencer half system off of WUF. With no middle silencer it sounded like a tractor, and dropped mid range. I fitted baffles into the silencers and it sounds good now, and surprisingly the mid range came back.

Didn't know Ben swapped it out - I think WUF was still in Ricks hands last time I saw it - good result with the baffles!

 

[blade7]

Is that a Janspeed?

Strictly it is essential styling as they paid for the development, but it was built by Janspeed and as ESS no longer exist I believe Janspeed can still make you one - they still had to the jigs to do so a few years back.

During the development they built 2 versions, an initial noisy version with one box and then what was to be the trackday friendly version with 2 boxes, the 2 box system produced more power so that became the standard version. (there may also have been a straight pipe experiment). They were available with the big oval or twin rounds.

Tony

Ben gave me the old twin silencer half system off of WUF. With no middle silencer it sounded like a tractor, and dropped mid range. I fitted baffles into the silencers and it sounds good now, and surprisingly the mid range came back.

Didn't know Ben swapped it out - I think WUF was still in Ricks hands last time I saw it - good result with the baffles!

I replaced the original 4 silencer system on my RS Cosworth, with a single silencer big bore stainless system. fairly similar result, bigger and louder isn't always better for a road car.

 

[Waylander]

My other one fills the space better though in my opinion (think it is 6x9")

that really does fill the hole, looks much better, any bigger and it would look like a ricer

 

[Paul 290T]

Could someone do me a big favour and measure the vertical and horizontal diameters of their OEM tail pipe chrome finisher?

I will get a new section welded to my otherwise good condition rear section of exhaust. i want to keep it all looking standard.

Paul

Vertical measuring straight up (ignoring the longer slash distance) is approx 75mm x width of approx 100mm on the outside, you could buy a standard tailpipe trim if you wanted to look completely standard and get exact measurements - mine came with a nice bag! (bought 2 as one was for a friend)

[attachImg]https://www.porscheclubgb.com/forum/download.axd?file=0;1043247&where=message&f=20180327_101243_resized.jpg[/attachImg]


Tony

Many thanks Tony, sorry for the late response.

To check i understand correctly: the standard exhaust trim is 100mm across the largest of its diameters?

Thanks

Paul

 

[944Turbo]

Could someone do me a big favour and measure the vertical and horizontal diameters of their OEM tail pipe chrome finisher?

I will get a new section welded to my otherwise good condition rear section of exhaust. i want to keep it all looking standard.

Paul

Vertical measuring straight up (ignoring the longer slash distance) is approx 75mm x width of approx 100mm on the outside

Many thanks Tony, sorry for the late response.

To check i understand correctly: the standard exhaust trim is 100mm across the largest of its diameters?

Thanks

Paul

Yes approximately

 

[Paul 290T]

Great, many thanks Tony.

 

[924Srr27l]

(Blake7) I replaced the original 4 silencer system on my RS Cosworth, with a single silencer big bore stainless system. fairly similar result, bigger and louder isn't always better for a road car.

Yes common mistake, BIG BORE = Faster car (mostly led by lots of hype and marketing)

Larger pipe = more volume transfer but Less gas speed (velocity) hence why the 968 has twin pipe system and not a bigger bore to find the extra ponies comparted to the S2 motor.

Smaller bore than standard but with unrestricted silencer(s) is better performance than a bigger pipe diameter also less heat losses and more scavenging effects...

Bigger tubes can be advantageous with some forced induction engines especially when modified if the system is stifled attempting to get the extra mixture and gases out..

R