Would there be interest in an affordable Valvetronic Exhaust? GROUP BUY OPENED!

Bomiz · 06-29-2018, 04:10 PM

Quote:

Originally Posted by L4ces

Some suggestions for doing the drive-by
- If WOT, please don't let off in front of the camera, let off a bit after passing the camera.
- Do some 2500, 3000, 45000 passes.
- Perform a deceleration pass
- remember when approaching the camera we tend to hear mostly induction noise as the exhaust noise travels mostly away from the camera.

Same with in-cabin which where we live anyway.

- Final note: WOT imho is the least pleasant sound and most exhausts sound similar at WOT.

I respect your time and efforts so anything you provide will be appreciated.

Haha i'll try my best. Thanks for the info, but most likely won't include all of that.

Also remember I have my second sample on the way as well.

TRUE2THEBLUE · 06-29-2018, 08:29 PM

Orgasmic sounds! TAKE MY MONEY before I spend it on a motorcycle lol

GORDON.M3 · 06-29-2018, 10:20 PM

Quote:

Originally Posted by Bomiz

Sounds like he was revving during a cold start lol

Edit: Listened to a couple vids of Kreissieg, opened it's kind of similar, but closed it's like driving stock

No it's not a coldstart, the car was warm. Kreissieg in general sounds like that with a catless x-pipe.

aus · 06-30-2018, 01:31 AM

Needs a little more sound with the valves closed, IMO.
A clip cruising at 1,900 RPM would be nice since that's where the engine tends to drone.
Great job!

Bomiz · 07-01-2018, 07:36 PM

my cousin took a few drivebys but cut them early and they didn't come out so well haha.

some more insight after a couple days...

valves closed is like full stock. zero drone whatsoever, you can't even tell the car has an exhaust. whenever I see a cop around I close them and proceed unseen.

valves open is an animal. I took my little brother to pickup lunch today and he said; wow you changed your exhaust? I said, why you don't like it? He goes it sounds great... it sounds like those one seater race cars. I laughed when he told me that haha.

I'm going to ask about increasing the volume a tad when they're closed.

I'll have the second sample maybe tomorrow or Tuesday and I want to immediately put it on to see the difference since im also excited about it.

I also need to either get my stock x pipe back or test it on a stock e90

kyippee · 07-01-2018, 08:04 PM

Quote:

Originally Posted by L4ces

Some suggestions for doing the drive-by
- If WOT, please don't let off in front of the camera, let off a bit after passing the camera.
- Do some 2500, 3000, 45000 passes.
- Perform a deceleration pass
- remember when approaching the camera we tend to hear mostly induction noise as the exhaust noise travels mostly away from the camera.

Same with in-cabin which where we live anyway.

- Final note: WOT imho is the least pleasant sound and most exhausts sound similar at WOT.

I respect your time and efforts so anything you provide will be appreciated.

Decibel meter while driving by possible? For us who are seeking to pass sound limits at tracks...

Bomiz · 07-02-2018, 01:22 AM

Quote:

Originally Posted by kpewpew

Quote:

Originally Posted by L4ces

Some suggestions for doing the drive-by
- If WOT, please don't let off in front of the camera, let off a bit after passing the camera.
- Do some 2500, 3000, 45000 passes.
- Perform a deceleration pass
- remember when approaching the camera we tend to hear mostly induction noise as the exhaust noise travels mostly away from the camera.

Same with in-cabin which where we live anyway.

- Final note: WOT imho is the least pleasant sound and most exhausts sound similar at WOT.

I respect your time and efforts so anything you provide will be appreciated.

Decibel meter while driving by possible? For us who are seeking to pass sound limits at tracks...

it's hard to really get you an exact number. because correct me if I'm wrong, Laguna seca is taken like 50ft away?

kyippee · 07-02-2018, 01:23 AM

@Bomiz yup but anything is better than nothing! I figure just measuring from the side of the road would be good enough for some sort of data point

Bomiz · 07-02-2018, 02:24 AM

Quote:

Originally Posted by kpewpew

@Bomiz yup but anything is better than nothing! I figure just measuring from the side of the road would be good enough for some sort of data point

Got it.

Are you preferring this test with or without cats? And i'm presuming you want them closed

kyippee · 07-02-2018, 02:25 AM

With cats and muffler closed

Example here, I did this and it read 93.8 dB at the max reading. I managed to pass the 90 dB sound at laguna likely due to the further measuring distance there, but very much borderline nowadays (was using instantaneous mode, should have used max mode)

Bomiz · 07-02-2018, 02:27 AM

Quote:

Originally Posted by kpewpew

With cats and muffler closed

Got it. Like I said before right now I don't have cats on so it'll have to wait a little.

But if we go off the sound without cats. With cats on It should be even quieter than stock.. for this prototype

Bomiz · 07-02-2018, 02:29 AM

Just watched your video. Without cats, and valves closed. It's quieter than that

6ixSpd · 07-02-2018, 06:36 PM

Alright I'm sold. Anxiously awaiting final production

Bomiz · 07-02-2018, 06:41 PM

Even though this is a valved exhaust. If people are interested in different designs, like a race exhaust, straight piped exhaust, or any other style.. if there's enough people interested I can develop something else as well

Bomiz · 07-02-2018, 08:02 PM

These are 80mm Straight cut tips with the wrong diameter inside, I just put them on to see the sizing.

I'll be trying to get a 83mm tip custom made for the project.

2018-07-02_06-00-26

Bomiz · 07-03-2018, 12:08 AM

Also made this page to have people subscribe if they are inactive on this thread!

Just enter your email here for the major exhaust updates!

https://www.bomizshop.com/subscribe

Dlpfcb · 07-03-2018, 07:23 AM

Subscribed, I need this thing before the beast is parked for the winter. JK Man, impressive updates and can’t believe how far you have gotten in a short amount of time.

jdamore · 07-03-2018, 10:31 AM

Im almost positive I've seen systems that can partially open the damper, true? I wonder what it would sound like with the damper at say 15%-20% open.

steven_s · 07-03-2018, 12:40 PM

I also see you're partial in Vancouver. Does this mean us Canadian's won't get the shaft when ordering for once? lol

Bomiz · 07-03-2018, 02:41 PM

Quote:

Originally Posted by steven_s

I also see you're partial in Vancouver. Does this mean us Canadian's won't get the shaft when ordering for once? lol

Unfortunately I no longer live in Vancouver, was there for about 6 months haha

Bomiz · 07-07-2018, 01:18 PM

Posting an update since I haven't said anything in a few days.

I was expecting to receive my second sample earlier this week. Long story short they told me it shipped a week prior and never did, I got super angry and upset... and they ended up shipping it on Monday/Tuesday. Because of the misfortune of this, I convinced them to fabricate sample tips for me. These tips will only fit on the second sample, and if I end up producing the second one it'll be fine, if not I just have to have them change the ID of the tips.

In terms of the tips I had them produce. I guesstimated the overall length, which I think should work. It's a Straight Cut Single wall Stainless Steel Tip. They sent me a picture of the sample last night and it does look good. If they work out it'll be available in a few different color options. The OD of the tips is 83mm, which should be perfect and beautiful.

In the end.. Tracking shows the second sample arrives Monday 7/9, and i'll be documenting and posting pictures of everything once again.

Here's a picture of the sample tips:

old4 · 07-09-2018, 08:15 AM

totally interested! love the deep throaty yet loud sound when valves are opened, actually sounds less raspy than other valvetronic exhausts... i was just thinking about switching my gintani sport rear section to a valvetronic setup. A decibel meter is a must if you ask me

06-29-2018, 08:29 PM	#134
TRUE2THEBLUE Lieutenant 50 Rep 409 Posts Drives: E92 M3 Join Date: Mar 2017 Location: Orange County, CA iTrader: (3)	Orgasmic sounds! TAKE MY MONEY before I spend it on a motorcycle lol
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06-30-2018, 01:31 AM	#136
aus Major General 892 Rep 9,032 Posts Drives: Odysse Join Date: Jul 2005 Location: Seal Beach, CA iTrader: (10)	Needs a little more sound with the valves closed, IMO. A clip cruising at 1,900 RPM would be nice since that's where the engine tends to drone. Great job! __________________ Let me get this straight... You are swapping out parts designed by some of the top engineers in the world because some guys sponsored by a company told you it's "better??" But when you ask the same guy about tracking, "oh no, I have a kid now" or "I just detailed my car." or "i just got new tires."
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07-01-2018, 07:36 PM	#137
Bomiz Captain 322 Rep 824 Posts Drives: SS E92 M3 Join Date: Jun 2012 Location: Los Angeles iTrader: (2)	my cousin took a few drivebys but cut them early and they didn't come out so well haha. some more insight after a couple days... valves closed is like full stock. zero drone whatsoever, you can't even tell the car has an exhaust. whenever I see a cop around I close them and proceed unseen. valves open is an animal. I took my little brother to pickup lunch today and he said; wow you changed your exhaust? I said, why you don't like it? He goes it sounds great... it sounds like those one seater race cars. I laughed when he told me that haha. I'm going to ask about increasing the volume a tad when they're closed. I'll have the second sample maybe tomorrow or Tuesday and I want to immediately put it on to see the difference since im also excited about it. I also need to either get my stock x pipe back or test it on a stock e90
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07-02-2018, 01:23 AM	#140
kyippee Lieutenant Colonel 1073 Rep 1,617 Posts Drives: E92 M3, Supra MK5, F44 235GC Join Date: Feb 2017 Location: SF Bay Area iTrader: (0)	@Bomiz yup but anything is better than nothing! I figure just measuring from the side of the road would be good enough for some sort of data point
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07-02-2018, 02:25 AM	#142
kyippee Lieutenant Colonel 1073 Rep 1,617 Posts Drives: E92 M3, Supra MK5, F44 235GC Join Date: Feb 2017 Location: SF Bay Area iTrader: (0)	With cats and muffler closed Example here, I did this and it read 93.8 dB at the max reading. I managed to pass the 90 dB sound at laguna likely due to the further measuring distance there, but very much borderline nowadays (was using instantaneous mode, should have used max mode)
	Appreciate 0 Quote

07-02-2018, 02:29 AM	#144
Bomiz Captain 322 Rep 824 Posts Drives: SS E92 M3 Join Date: Jun 2012 Location: Los Angeles iTrader: (2)	Just watched your video. Without cats, and valves closed. It's quieter than that
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07-02-2018, 06:36 PM	#145
6ixSpd Save the manuals! 6015 Rep 6,745 Posts Drives: '16 M3, '23 718 Spyder Join Date: Feb 2016 Location: 416 iTrader: (4)	Alright I'm sold. Anxiously awaiting final production __________________ '16 M3 \| '23 718 Spyder Past: E92 M3, F87 M2, E39 M5, etc
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07-02-2018, 06:41 PM	#146
Bomiz Captain 322 Rep 824 Posts Drives: SS E92 M3 Join Date: Jun 2012 Location: Los Angeles iTrader: (2)	Even though this is a valved exhaust. If people are interested in different designs, like a race exhaust, straight piped exhaust, or any other style.. if there's enough people interested I can develop something else as well
	Appreciate 0 Quote

07-02-2018, 08:02 PM	#147
Bomiz Captain 322 Rep 824 Posts Drives: SS E92 M3 Join Date: Jun 2012 Location: Los Angeles iTrader: (2)	These are 80mm Straight cut tips with the wrong diameter inside, I just put them on to see the sizing. I'll be trying to get a 83mm tip custom made for the project. 2018-07-02_06-00-26
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07-03-2018, 12:08 AM	#148
Bomiz Captain 322 Rep 824 Posts Drives: SS E92 M3 Join Date: Jun 2012 Location: Los Angeles iTrader: (2)	Also made this page to have people subscribe if they are inactive on this thread! Just enter your email here for the major exhaust updates! https://www.bomizshop.com/subscribe
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07-03-2018, 07:23 AM	#149
Dlpfcb Captain 483 Rep 647 Posts Drives: AW E92 M3 Join Date: Aug 2017 Location: Idaho iTrader: (1)	Subscribed, I need this thing before the beast is parked for the winter. JK Man, impressive updates and can’t believe how far you have gotten in a short amount of time.
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07-03-2018, 10:31 AM	#150
jdamore Captain 433 Rep 855 Posts Drives: 2008 e92 M3 Join Date: May 2013 Location: New Jersey iTrader: (4)	Im almost positive I've seen systems that can partially open the damper, true? I wonder what it would sound like with the damper at say 15%-20% open. __________________ -- 08 JB e92 6MT ///M3 ESS VT2-625 --
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07-03-2018, 12:40 PM	#151
steven_s First Lieutenant 50 Rep 357 Posts Drives: M3 Join Date: Sep 2014 Location: Canada iTrader: (3)	I also see you're partial in Vancouver. Does this mean us Canadian's won't get the shaft when ordering for once? lol
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07-07-2018, 01:18 PM	#153
Bomiz Captain 322 Rep 824 Posts Drives: SS E92 M3 Join Date: Jun 2012 Location: Los Angeles iTrader: (2)	Posting an update since I haven't said anything in a few days. I was expecting to receive my second sample earlier this week. Long story short they told me it shipped a week prior and never did, I got super angry and upset... and they ended up shipping it on Monday/Tuesday. Because of the misfortune of this, I convinced them to fabricate sample tips for me. These tips will only fit on the second sample, and if I end up producing the second one it'll be fine, if not I just have to have them change the ID of the tips. In terms of the tips I had them produce. I guesstimated the overall length, which I think should work. It's a Straight Cut Single wall Stainless Steel Tip. They sent me a picture of the sample last night and it does look good. If they work out it'll be available in a few different color options. The OD of the tips is 83mm, which should be perfect and beautiful. In the end.. Tracking shows the second sample arrives Monday 7/9, and i'll be documenting and posting pictures of everything once again. Here's a picture of the sample tips:
	Appreciate 1 old413.00 Quote

07-09-2018, 08:15 AM	#154
old4 E92 M3 13 Rep 174 Posts Drives: Jerez Black E92 M3 Join Date: Jan 2017 Location: Champaign, IL iTrader: (0)	totally interested! love the deep throaty yet loud sound when valves are opened, actually sounds less raspy than other valvetronic exhausts... i was just thinking about switching my gintani sport rear section to a valvetronic setup. A decibel meter is a must if you ask me __________________ photography page : https://www.instagram.com/joema_autogallery/?hl=en 08 jerez black E92 / Gintani / Bimmerworld / Dinan / Active Autowerke / Advan F7 / AC Schnitzer / Varis / IND / Vorsteiner / RKP / Sabelt / Stoptech
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