R36 Deleting the exhaust drone accomplished!

[Steve]

Mr R36, I can upload images and video for you if you email them to me. r36@mig15.net.

[Jakeys]

Update: I can't believe it but I've managed to get even more crackle, rasp and less drone. It's more noticeable in cabin now and all other features such as drone during cruise and idle noise remains in all fairness unchanged. I suspect however that cold start will be louder as per priming of exhaust but that will subside in about a minute.

How did i achieve this?

I deleted one hot dog resonator (right before the cat) and replaced with straight pipe. The muffler man suggested i don't do both hot dogs to begin with. One deleted also creates an uneven note which further adds to the crackle. I also have pictures which I'll now learn to upload

I wonder what it would sound like if you removed both hot dogs and replace the suitcase with the J pipe BUT leave the cats alone. Thoughts on that sort of setup? A bit different from what you've done.

Mr R36, I can upload images and video for you if you email them to me. r36@mig15.net.

Don't do this. You can't e-mail a video that big via e-mail, e-mail should really be well under 10MB, I am assuming your video is hundreds of MB.

[Steve]

Depends on his outgoing server. The images will be fine, the video is a maybe.

[tinto]

I had mine noisy for a while by removing both rear back boxes and replacing with 3" straight through pipe.
I had it made bolt on /off - the back boxes are back on right now.

I think the mid box approach is a more sensible angle, particularly if it's silent /OEM feeling around 2.5k-3k RPM.
Mine would give a terrible resonating MOOOOOOOO at those RPM. Which happened to be the sweet spot for freeway cruising in 6th. Yet in 5th it was silent...

I'm very keen to hear a video of what you've done. Not static revving, but under load in-cabin and as a drive by.

[Mr R36]

I wonder what it would sound like if you removed both hot dogs and replace the suitcase with the J pipe BUT leave the cats alone. Thoughts on that sort of setup? A bit different from what you've done.

^ I'm not sure as i haven't done this nor heard of this done as J pipes are a relatively new design and can vary as the engineering can be quite complex. More accessible probably is buying a helmholtz resonator which has similar principles to the J pipe. However the shop did say an R36 once tried deleting both suitcase and hotdogs and the result was a very very loud drone.

Today was the first they've ever tried deleting a single hotdog with high flow cat and j pipe middle resonator. In my opinion it is very nice (almost borderline too raspy...nah i take that back).

What you could do is try backwards to what i tried. Start by installing a helmholtz resonator or ask to customise a J pipe (buying one off say a C63 will cost you an arm and a leg),see how you like it, then try delete one hotdog should you see fit, then two, then the cats etc. If you don't want it as loud then you csn turn to valve control or get 200 cell cats instead of 100 cells.

Don't do this. You can't e-mail a video that big via e-mail, e-mail should really be well under 10MB, I am assuming your video is hundreds of MB.

^ Yeah my problem now. youtube is being silly and wont let me upload - not even google is helping. I think maybe i can upload it onto my Facebook or instagram if that works for guys? Otherwise I'm meeting up with another 36 owner this weekend and he night be able to film.

[damo_t]

^ Yeah my problem now. youtube is being silly and wont let me upload - not even google is helping. I think maybe i can upload it onto my Facebook or instagram if that works for guys? Otherwise I'm meeting up with another 36 owner this weekend and he night be able to film.

If it's a big file maybe Dropbox would work and you could share the link?

Either way, which ever works for you, it's really helping us all out!

[Mr R36]

Alright turns out my settings didn't allow me to upload via mobile without wifi. All sorted now and links below.

1. Simple suitcase delete (for reference)

VW R36 Stock Exhaust Suitcase Muffler Delete: VW R36 Stock Exhaust Suitcase Muffler Delete - YouTube

2. Suitcase delete plus high flow cat (no j pipe yet)

VW R36 Stock Exhaust + High Flow Cat: https://youtu.be/2Tz0fDsKHXc

I will upload tonight or tomorrow what it sounds like without one hotdog and added j pipe (completely different animal altogether) outside, and then also inside cabin on cruise and under heavy throttle

[Jakeys]

Okay, so to confirm, number 2 is high flow cats and straight pipe where suitcase was, but no J pipe and no other changes. And that still produced the 2-3000rpm highway drone, correct?

Looking forward to next vid.

Great work man this is the most useful exhaust thread I've seen!

[damo_t]

I concur with Jakey!

Thanks for the videos mate. The "rasp" from the 2nd video is nice! I'm also looking forward to the next videos.

Is it possible to grab a picture of the J-Pipe itself or even the length of the "J" extension? That would be most helpful for my situation, as I've recently performed the suitcase delete and want to get rid of the dreaded 2k-3k rpm drone.

[dannyjak]

Exciting times!

If I can get pics and some rough dimensions on the J-Pipe, might be visiting the local shop soon to
- suitcase delete
- add J-Pipes
- replace a hot dog resonator with a straight through pipe

[dannyjak]

Is the raspiness coming from the hi flow cat? given your second video, it appears to be the case.
Im trying to figure out whether you can get the raspiness without changes the cats

[Mr R36]

Correct, the second video is cat without suitcase and no j pipe just straight pipe.

And yes the cats alone did achieve the rasp but didnt cancel out the drone. The j pipe is my effort to cancel out the drone from the middle resonator so a j pipe or helmholtz resonator in replacement of the suitcase might be good enough for some of you.

Heres a video of cat + j pipe on cruise and under heavy throttle

VW R36 exhaust cruise (cat and j pipe) cabin: VW R36 exhaust cruise (cat and j pipe) cabin - YouTube

VW R36 exhaust throttle (cat, j pipe): VW R36 exhaust throttle (cat, j pipe) - YouTube

[Mr R36]

I've noticed some of you are keen to experiment the whole lot of what i have tried minus the high flow cats: can i ask what is influencing this choice? If it's a cost factor it's worth mentioning that where I went (in Melbourne obviously) they did the cats and said they can install a helmholtz resonator for free if i wanted. They ended up customising a j pipe for me in the end as i was a repeat customer. If you did the other way around (install helmholtz resonator) and decided you and cats i don't think they will give that away for free...does this make sense?

[dannyjak]

Cat cost is the majority of the reason for me. I dont feel like its not an important replacement unless the raspiness only comes from the cats. Happy to just go to an exhaust shop to get them to delete the suitcase, and add some J-pipes

[damo_t]

Once again, helpful videos Mr R36!
I'm the same as Danny regarding cost of the cats as the inhibiting factor. Maybe I should take you up on the group buy you suggested earlier

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