Urgent 330i exhaust advice

[Gizmo]

As I said, fit the biggest free flow box u can but it must be a good quality box like cowley to avoid droning. The car will sound loud and racey for first two weeks but then the fiberglass fibers will align themselves and the tone will become deep and rich.

 

[ggrobler]

If you dont want it louder fit an Xpipe

As mention in my post xpipe is the why to go but the diffrence is not much but as Gizmo mentioned the tone do chang after driving it a bit.

 

[Yuben]

This whole build confuses me a little.....if you are going to keep the stock backbox, why not just cut the cats out of the midsection and put on the 328i headers? Why build a whole new mid-section that poses no improvement over the stock mid-section?

Also in the second video is that steam or smoke? If its smoke :mmm:.
If its steam.......it is not a good idea at all to rev a cold motor like that.

Sank the reason for build was to Decat and allow the engine to breathe through 57mm piping all the way.
The reason for retaining the back box was solely my choice as I didn't want it to be too loud. At this juncture, that proved to be an error on my part.

In the second video, the car was already warm, the smoke you saw was the inner coating of the piping that was burning out:thumbs:

Out of interest, what size back box did Van Der Linde put on yours?

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Thanks to Ralf and his team for the excellent workmanship and hospitality.
I must say the sound is fractionally louder, that's how I wanted it.
The response is tremendous. Low down it pulls much harder.
Very happy with it all round:thumbs:

Yuben suggested you get a x pipe install it will help to get the tone down a bit. Have done it on my 325ti it was very loud so asked TNT to install one after they installed a full system 2x 63mm yes i know now its to big but think you take your car to tnt they will no what to put on the car. Tom said he installed it decause of the blower on the car :blab:

Thanks, what is size of the back box that Tom fitted?

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Thanks to Ralf and his team for the excellent workmanship and hospitality.
I must say the sound is fractionally louder, that's how I wanted it.
The response is tremendous. Low down it pulls much harder.
Very happy with it all round:thumbs:

Yuben suggested you get a x pipe install it will help to get the tone down a bit. Have done it on my 325ti it was very loud so asked TNT to install one after they installed a full system 2x 63mm yes i know now its to big but think you take your car to tnt they will no what to put on the car. Tom said he installed it decause of the blower on the car :blab:

Thanks, what is size of the back box that Tom fitted?

 

[Gizmo]

One more question, did you go mild steel or stainless steel piping?

 

[Yuben]

One more question, did you go mild steel or stainless steel piping?

Mild steel. I've prefer it over stainless steel :fencelook:

 

[Gizmo]

Mild steel is better for quiet operation over stainless but stainless will last at the coast, so don't go moving down to Durban or some other coastal town. Can't wait to hear the finished product.:thumbs:

 

[ggrobler]

This whole build confuses me a little.....if you are going to keep the stock backbox, why not just cut the cats out of the midsection and put on the 328i headers? Why build a whole new mid-section that poses no improvement over the stock mid-section?

Also in the second video is that steam or smoke? If its smoke :mmm:.
If its steam.......it is not a good idea at all to rev a cold motor like that.

Sank the reason for build was to Decat and allow the engine to breathe through 57mm piping all the way.
The reason for retaining the back box was solely my choice as I didn't want it to be too loud. At this juncture, that proved to be an error on my part.

In the second video, the car was already warm, the smoke you saw was the inner coating of the piping that was burning out:thumbs:

Out of interest, what size back box did Van Der Linde put on yours?

---

Thanks to Ralf and his team for the excellent workmanship and hospitality.
I must say the sound is fractionally louder, that's how I wanted it.
The response is tremendous. Low down it pulls much harder.
Very happy with it all round:thumbs:

Yuben suggested you get a x pipe install it will help to get the tone down a bit. Have done it on my 325ti it was very loud so asked TNT to install one after they installed a full system 2x 63mm yes i know now its to big but think you take your car to tnt they will no what to put on the car. Tom said he installed it decause of the blower on the car :blab:

Thanks, what is size of the back box that Tom fitted?

---

Thanks to Ralf and his team for the excellent workmanship and hospitality.
I must say the sound is fractionally louder, that's how I wanted it.
The response is tremendous. Low down it pulls much harder.
Very happy with it all round:thumbs:

Yuben suggested you get a x pipe install it will help to get the tone down a bit. Have done it on my 325ti it was very loud so asked TNT to install one after they installed a full system 2x 63mm yes i know now its to big but think you take your car to tnt they will no what to put on the car. Tom said he installed it decause of the blower on the car :blab:

Thanks, what is size of the back box that Tom fitted?

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He installed a 400mm x 200mm duel 63mm back box it all he could get in to the ti

 

[Yuben]

Hoping a 500mm long 2 in 2 out will work

 

[ggrobler]

Hoping a 500mm long 2 in 2 out will work

Don't forget to install X Pipe will help with the loud drone in the car 2000rpm is the worse :yuck:

 

[Yuben]

Excuse my ignorance but how does the x pipe work. I saw ur pic. Do both pipes need to join?

 

[ggrobler]

For any performance exhaust system, some type of crossover connecting the two sides of a dual exhaust system is important because it acts to balance the two banks of the engine. The common H-style crossover is good at balancing sound pulses between the two halves, but does little to promote scavenging because the exhaust gases tend to follow the path of least resistance, which is straight through each pipe rather than taking the 90-degree turn through the H-pipe into the other half of the system. In an X-pipe system, however, where the two sides of the system intersect, the gasses have no choice but to intermingle as they pass through the junction. This promotes improved scavenging effects by smoothing out uneven exhaust pulses from the engine’s firing order. It also helps quiet down the exhaust, resulting in a mellower, less raspy tone. According to Magnaflow, the faster acceleration of the gasses through an X-pipe causes them to flow in a linear fashion parallel to the walls of the tubing rather than tumbling. This “laminar” flowing gas is much quieter than tumbling gas, resulting in an exhaust tone up to 8 decibels quieter than a traditional H-pipe.

 

[Ralf*]

For any performance exhaust system, some type of crossover connecting the two sides of a dual exhaust system is important because it acts to balance the two banks of the engine. The common H-style crossover is good at balancing sound pulses between the two halves, but does little to promote scavenging because the exhaust gases tend to follow the path of least resistance, which is straight through each pipe rather than taking the 90-degree turn through the H-pipe into the other half of the system. In an X-pipe system, however, where the two sides of the system intersect, the gasses have no choice but to intermingle as they pass through the junction. This promotes improved scavenging effects by smoothing out uneven exhaust pulses from the engine’s firing order. It also helps quiet down the exhaust, resulting in a mellower, less raspy tone. According to Magnaflow, the faster acceleration of the gasses through an X-pipe causes them to flow in a linear fashion parallel to the walls of the tubing rather than tumbling. This “laminar” flowing gas is much quieter than tumbling gas, resulting in an exhaust tone up to 8 decibels quieter than a traditional H-pipe.

:ty:

 

[Yuben]

Awesome stuff by Ralf and team.
New back box fitted and it sounds awesome. No need for the X pipe.
Really deep tone at start up and at low revs, yet from 100-120 it is as quiet as the stock exhaust.
Big thanks to Ralf, Cecil and Jacksonraise:

 

[Ralf*]

Removal of the standard BMW rear box and replaced with a "2-in-2-out" box from COWLEY exhaust.

Thanks YUBEN, I am glad you enjoy the new power and SOUND, it sounded awesome when you pulled away from the shop

https://www.facebook.com/photo.php?...449.1073741943.465971326791996&type=3&theater

video to follow, a bit slow upload speed at the moment

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and the new "sound" video below

https://www.facebook.com/photo.php?v=10151985828237959

 

[Yuben]

Hoping a 500mm long 2 in 2 out will work

Don't forget to install X Pipe will help with the loud drone in the car 2000rpm is the worse :yuck:

Thanks bro for all the knowledge around the Xpipe.
Luckily for my set up I do not experience any drone and did not need the Xpipe :thumbs:

Also big thanks To Gizmo and the others who offered constructive advice enabling Ralf to do the best possible set up for me:ty::ty::ty:

 

[Yuben]

Was cruising through Clearwater parking lot yesterday at low revs while looking for parking. The tone was just awesome prompting a guy who to stop me to say " sounds very nice, where did you do it? "

Just said Speedway Motorsport, Kempton Park :thumbs:

 

[Yuben]

KEEP IT! It will be VERY LOUD if you replace it! Annoyingly loud. Do the whole system but keep the back box. Not much to gain. In my research to do a full system I have been advised against it as it will drone and the OEM box is actually better than the replacement boxes (can't be improved on).

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Change the Exhaust tips if you want a better look

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Chris, just thought I'd share some feedback. The tone is amazing with the new back box. Not annoyingly loud as initally predicted. There is that nice deep tone low down and it gets quiet as stock from 3000rpm.
At cruising speeds between 120-140 you will not say that the exhaust is changed.

That's exactly how I wanted it.

 

[ChrisBrand]

KEEP IT! It will be VERY LOUD if you replace it! Annoyingly loud. Do the whole system but keep the back box. Not much to gain. In my research to do a full system I have been advised against it as it will drone and the OEM box is actually better than the replacement boxes (can't be improved on).

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Change the Exhaust tips if you want a better look

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Chris, just thought I'd share some feedback. The tone is amazing with the new back box. Not annoyingly loud as initally predicted. There is that nice deep tone low down and it gets quiet as stock from 3000rpm.
At cruising speeds between 120-140 you will not say that the exhaust is changed.

That's exactly how I wanted it.

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Thanks Yuben! :thumbs: Been waiting for someone to take the plunge and update. Getting very excited to do this myself! But first the maintenance issues

 

[Yuben]

Go ahead, if done right, it can sound awesome. Then you will love the 6 cylinder even more :rollsmile:

 

[Bavs108]

Nicely done:thumbs: I'm still in 2 minds about decatting my exhaust:flyfun: I quite like the stock exhaust note and also often get random people coming up to me commenting about the sound which I never get to hear in the cabin:tease: