Exhaust rerouting-another mod

[Klaus Schlueter]

Recently we had long lists in the forum concerning Stag modifications. A lot of the mentioned mods have been incorporated in my Stag over the last 25 years. But I have two mods which I didn't find in the lists and which might be of interest for others: rerouted exhaust and a more sensitive heater valve.
Here is the exhaust mod from 2015 in pictures (some more to follow):



K1600_IMG_1.jpgK1600_IMG_2.jpgK1600_IMG_3.jpgK1600_IMG_5.jpgK1600_IMG_4.jpg

And some parts I have used:

http://dein-sportauspuff.de/bastuck-edelstahlrohr-laenge-1m-41mm-1-5-8-11205.html

https://www.hild-tuning.de/index.php?lang=0&cl=search&searchparam=820450

Klaus

[Klaus Schlueter]

Some more pics:

K1600_IMG_6.jpgK1600_IMG_7.jpgK1600_IMG_8.jpgK1600_IMG_9.jpgK1600_IMG_10.jpg

[Klaus Schlueter]

And some more:
K1600_IMG_2629.jpgK1600_IMG_2626.jpgK1600_IMG_2493.jpgK1600_IMG_2632.jpg2 Kats + Spacer.jpg

With this mod it's really fun now to take the exhaust out.

The last two pictures show a spacer from my 3 way catalyst around 1999 which I used in the Stag for appr. 2 years. Why do I show this picture? Because the catalysts and now the spacer have -in my eyes- the ideal connection. It is an Eberspächer part used by Mercedes and it is 100% gas tight. I don't know whether it is still available.

Klaus

[davidf]

Not sure I feel the need myself (and anyway, I don't have the resources to do such a job), but I love the quality of your engineering. I think the design of your new exhaust hangers at the sub frame holes is particularly neat.

[Stagdad]

Similar to "v" band clamps which are readily available in larger sizes but I never seen them in the stag standard bore size.

[bullstarz]

The standard stag exhaust has the "H" pipe but if you fit the "X" pipe not only does it sound better but helps gas flow. Flow make it go.

[new to this]

Similar to "v" band clamps which are readily available in larger sizes but I never seen them in the stag standard bore size.

I think standard stag exhaust is 38mm, you can get V Bands in that size ,eBay

Dave

[new to this]

The standard stag exhaust has the "H" pipe but if you fit the "X" pipe not only does it sound better but helps gas flow. Flow make it go.

Have you fitted the H pipe, and then come of that to your side pipe's, so in a way your two silencers short,as the original tail pipes were silencers

Dave

[Stagdad]

Have you fitted the H pipe, and then come of that to your side pipe's, so in a way your two silencers short,as the original tail pipes were silencers

Dave

I imagine an x pipe was used Dave not an H

[dasadrew]

Hi Klaus,

not your usual quality: I would have expected the H-pipe to be equipped with an electrically operated variable valve which adjusts the flow between LH and RH in accordance with Lambda probes in each of the tail pipes!

Drew

[new to this]

I imagine an x pipe was used Dave not an H

meant to say x pipe,

[Stagdad]

The standard stag exhaust has the "H" pipe but if you fit the "X" pipe not only does it sound better but helps gas flow. Flow make it go.

I was in 2 minds which to go for when I built my exhaust. From what I read and it all seemed to agree an "x" gave more power and sounded raspier. An "H" gave better torque and sounded deeper. I went for an "H" but made it so that section could easily be swapped for an "x" if the mood took me.

[bullstarz]

I think the X pipe is slightly better for a higher revving engines. I had one on the old engine. The new set up is 2" log manifolds as there wasn't the room for any thing fancy. These both feed into separate ports to the turbo, Then from there its a 4"or 3" ( cant remember) outlet into 2, 2" pipes, then straight out to the side pipes. Completely free flowing system as the side pipes are the absorption type, straight through.

Its not noisy though, turbos are a good silencer.

[Klaus Schlueter]

Everything is already prepared Drew: 2 Lambda probes, air control valve and the electronic control

Elektrik.jpg

Klaus

[bullstarz]

Everything is already prepared Drew: 2 Lambda probes, air control valve and the electronic control

[ATTACH=CONFIG]42215[/ATTACH]

Klaus

Which ECU are you using, as some allow 2 Lambda sensors but take an average from the two to work out the AFR. There's not that many ECUs that can assign one lambda sensor to one bank of injectors, you are also looking at sequential injection for it to work.