Group Buy - Haimus Racing Carbon Fiber Plenum

chutak · 06-06-2022, 08:30 PM

Quote:

Originally Posted by e90335e36m3

To be fair, we all want to see dynos but I agree most of us don't have time or access to do it push come to shove. I really wanted to dyno my car after I had a Harrop blower installed, and I wasn't going to go out of my way to go to another shop before and after the installation, I put my foot down and really liked what I felt. Now with this plenum, I'd run for the hills. Dropping that kind of $$$ on intake noise (no HP) is beyond comprehension. Maybe no dyno because in this case ignorance is bliss.

It's not much different than buying an axle back exhaust for sound. Most decent ones will cost $1500+ and probably gain 5 hp, if any.

Aside from a tune and test-pipes/x-pipe, there's not much else to get for significant hp gains on these cars, short of a supercharger kit. And dropping 10-11k on a Harrop can be difficult to justify for some.

SilverSlug · 06-06-2022, 08:41 PM

Quote:

Originally Posted by chutak

Quote:

Originally Posted by e90335e36m3

Quote:

Originally Posted by SilverSlug

… assuming it's a gain, and not a loss.

Again, more regarding 10th Man Rule principle to reassure a novel design, rather than skepticism.

To be fair, we all want to see dynos but I agree most of us don't have time or access to do it push come to shove. I really wanted to dyno my car after I had a Harrop blower installed, and I wasn't going to go out of my way to go to another shop before and after the installation, I put my foot down and really liked what I felt. Now with this plenum, I'd run for the hills. Dropping that kind of $$$ on intake noise (no HP) is beyond comprehension. Maybe no dyno because in this case ignorance is bliss.

It's not much different than buying an axle back exhaust for sound. Most decent ones will cost $1500+ and probably gain 5 hp, if any.

Aside from a tune and test-pipes/x-pipe, there's not much else to get for significant hp gains on these cars, short of a supercharger kit. And dropping 10-11k on a Harrop can be difficult to justify for some.

Well, no… Post cat axle-back slip on mufflers for sound is not a viable comparison to increasing the volume of the plenum and changing the design structure of the velocity stacks.

I'll give it up since nobody seems to care about potential torque losses, but all the reasons given thus far are just cognitive bias, and don't apply here. Just saying.

leftfootbr8king · 06-07-2022, 05:32 AM

These folks bought a plenum in a group buy to save a few hundred bucks.

It's a bit of a stretch to think they'd be excited about finding a dyno and spending the money they saved on a few runs to get a delta number they couldn't feel in the seat.

jp1984 · 06-07-2022, 01:48 PM

Quote:

Originally Posted by leftfootbr8king

These folks bought a plenum in a group buy to save a few hundred bucks.

It's a bit of a stretch to think they'd be excited about finding a dyno and spending the money they saved on a few runs to get a delta number they couldn't feel in the seat.

I would have thought an early adopter would have been a big enough gear head to want to see that delta proven. I guess not.

MrBlueSkies · 06-07-2022, 04:19 PM

Haimus have had a dyno before and after comparison available since well before the group buy started. They also had a good commentary on how they interpreted it. I read that before I put my money down. My own experience has been in line with that comparison, sure only by feel, not by measurement, but that doesn't make me any less happy with the result. Yes its a lot to spend on changing the sound, but for me the primary attraction of the E9x M3 is the theatre it creates, and the sound it makes is a big part of that. If I wanted a higher hp car, or a sweeter handling car, or a head turner, there are better alternatives. But its hard to beat this car for theatre, and the Haimus plenum undoubtedly adds to that.

leftfootbr8king · 06-07-2022, 05:14 PM

Quote:

Originally Posted by jp1984

Quote:

Originally Posted by leftfootbr8king

These folks bought a plenum in a group buy to save a few hundred bucks.

It's a bit of a stretch to think they'd be excited about finding a dyno and spending the money they saved on a few runs to get a delta number they couldn't feel in the seat.

I would have thought an early adopter would have been a big enough gear head to want to see that delta proven. I guess not.

I guess some guys really want to be able to point to it at cars and coffee and say "yea…someone I don't know on the forums got 8 more hp on the dyno with this plenum"

Cool, man.

TDW_Nero · 06-08-2022, 07:10 PM

4 Plenums arrived today. 2 with Logos and 2 Blanks. All shipped out and updated the list

jp1984 · 06-09-2022, 11:00 AM

Quote:

Originally Posted by Nero_tDriveway

4 Plenums arrived today. 2 with Logos and 2 Blanks. All shipped out and updated the list

Nice, I was not part of the Group Buy but know it is a lot of work. Thank you.

02is-gte · 06-09-2022, 12:08 PM

Since the elbow portion is developed and in production is there going to be another round of group buys for the the combo. ???

SOM3AT · 06-09-2022, 08:44 PM

Quote:

Originally Posted by 02is-gte

Since the elbow portion is developed and in production is there going to be another round of group buys for the the combo. ???

In on this as well!

cloumeM · 06-10-2022, 04:25 AM

Quote:

Originally Posted by 02is-gte

Since the elbow portion is developed and in production is there going to be another round of group buys for the the combo. ???

Same here.

TDW_Nero · 06-10-2022, 02:56 PM

Quote:

Originally Posted by 02is-gte

Since the elbow portion is developed and in production is there going to be another round of group buys for the the combo. ???

Quote:

Originally Posted by cloumeM

Same here.

I will need to discuss with Haimus first. I'll update the first thread and post when pricing, numbers, and timeframe are finalized. I'd like to give more accurate dates this next time around

nekbreaker · 06-21-2022, 05:23 AM

Install the plenum this past weekend sounds awesome the 2 valve cover breather thingy was a pita to seated right but I got it what a great upgrade well made

jp1984 · 06-21-2022, 10:34 PM

Hey let me know if you plan on ever do any car meet ups in person this year, I would love to hear the plenum in person.

nekbreaker · 06-22-2022, 12:52 AM

Quote:

Originally Posted by jp1984

Hey let me know if you plan on ever do any car meet ups in person this year, I would love to hear the plenum in person.

You talking to me

4DOOR_E90 · 06-23-2022, 12:16 PM

Any update on when the next batch is being sent. I'm next up! Haha

TDW_Nero · 06-23-2022, 05:16 PM

Quote:

Originally Posted by 4DOOR_E90

Any update on when the next batch is being sent. I'm next up! Haha

Haimus sent us 2 plenums on the current shipment, 1 logo 1 blank. Unfortunately you're the very next one after this

So close yet so far

bmwm3fanatic · 06-23-2022, 10:41 PM

Quote:

Originally Posted by Nero_tDriveway

Haimus sent us 2 plenums on the current shipment, 1 logo 1 blank. Unfortunately you're the very next one after this

So close yet so far

Following thread for the next plenum group buy! Haha.

mikejnc · 06-28-2022, 01:34 PM

Just curious, do the Haimus plenums produce the same amount of increased sound when compared to other options?

Silos · 06-28-2022, 03:06 PM

Quote:

Originally Posted by mikejnc

Just curious, do the Haimus plenums produce the same amount of increased sound when compared to other options?

I've gone through two iterations of the CarboProject Plenum, which utilizes the bottom factory plenum and a carbon lid on the top half - I found their "Export" version had a higher pitch sound vs Haimus' that has a deep/bass sound to it. Now, that can easily be translated to "louder" but I prefer the more booming sound of the Haimus; it gives it an angry growl.

cloumeM · 07-01-2022, 10:16 AM

Came back in town from a long international trip and had a chance to open the package. The quality seems superb with no blemish I can find. And, what makes it very special for me is that my plenum is #100 produced! Install will likely happen next weekend.

Grippinaround · 07-01-2022, 01:10 PM

This wait is killing me!!

06-07-2022, 05:32 AM	#399
leftfootbr8king Lieutenant 570 Rep 512 Posts Drives: E92 M3 Join Date: Dec 2020 Location: South Carolina iTrader: (2)	These folks bought a plenum in a group buy to save a few hundred bucks. It's a bit of a stretch to think they'd be excited about finding a dyno and spending the money they saved on a few runs to get a delta number they couldn't feel in the seat.
	Appreciate 1 cvstar9M3284.00 Quote

06-07-2022, 04:19 PM	#401
MrBlueSkies New Member 18 Rep 26 Posts Drives: BMW E92 M3 Join Date: Nov 2021 Location: New Zealand iTrader: (0)	Haimus have had a dyno before and after comparison available since well before the group buy started. They also had a good commentary on how they interpreted it. I read that before I put my money down. My own experience has been in line with that comparison, sure only by feel, not by measurement, but that doesn't make me any less happy with the result. Yes its a lot to spend on changing the sound, but for me the primary attraction of the E9x M3 is the theatre it creates, and the sound it makes is a big part of that. If I wanted a higher hp car, or a sweeter handling car, or a head turner, there are better alternatives. But its hard to beat this car for theatre, and the Haimus plenum undoubtedly adds to that.
	Appreciate 2 SnohoRaptor534.50 cloumeM165.50 Quote

06-08-2022, 07:10 PM	#403
TDW_Nero Private First Class 180 Rep 187 Posts Drives: 2009 e92 M3 Space Gray Join Date: Oct 2018 Location: Norcal iTrader: (1)	4 Plenums arrived today. 2 with Logos and 2 Blanks. All shipped out and updated the list __________________ The Driveway 1691 Villa Stone Dr # 40 San Jose, CA 95125 09 E92 M3 . 06 E60 M5 . 99 2.5L Z3 . 97 E36 M3
	Appreciate 4 jacksonE9232.50 SnohoRaptor534.50 cloumeM165.50 Gossypiboma542.00 Quote

06-09-2022, 12:08 PM	#405
02is-gte Private First Class 28 Rep 165 Posts Drives: E93 and E90 M3 Join Date: Feb 2019 Location: SoCal iTrader: (1)	Since the elbow portion is developed and in production is there going to be another round of group buys for the the combo. ???
	Appreciate 0 Quote

06-21-2022, 05:23 AM	#409
nekbreaker Captain 170 Rep 618 Posts Drives: bmw e92 m3 Join Date: Mar 2011 Location: massachussett iTrader: (1)	Install the plenum this past weekend sounds awesome the 2 valve cover breather thingy was a pita to seated right but I got it what a great upgrade well made Attached Images
	Appreciate 9 Silos555.50 SnohoRaptor534.50 jacksonE9232.50 slcook541863.00 cloumeM165.50 4DOOR_E9096.50 Gossypiboma542.00 Battle161.50 cvstar9M3284.00 Quote

06-21-2022, 10:34 PM	#410
jp1984 Lieutenant 506 Rep 550 Posts Drives: an E92 Join Date: Jun 2019 Location: under the hood again iTrader: (0)	Hey let me know if you plan on ever do any car meet ups in person this year, I would love to hear the plenum in person.
	Appreciate 0 Quote

06-23-2022, 12:16 PM	#412
4DOOR_E90 Private First Class 97 Rep 159 Posts Drives: M3 Join Date: Jan 2017 Location: NY iTrader: (0)	Any update on when the next batch is being sent. I'm next up! Haha
	Appreciate 0 Quote

06-28-2022, 01:34 PM	#415
mikejnc Private 18 Rep 93 Posts Drives: 09 AW E90 M3, GX460, LR3 Join Date: Jun 2017 Location: Rancho Cucamonga, CA iTrader: (2)	Just curious, do the Haimus plenums produce the same amount of increased sound when compared to other options?
	Appreciate 0 Quote

07-01-2022, 10:16 AM	#417
cloumeM Lieutenant 166 Rep 477 Posts Drives: BMW e93 M3 Join Date: Sep 2021 Location: St. Louis, MO iTrader: (7)	Came back in town from a long international trip and had a chance to open the package. The quality seems superb with no blemish I can find. And, what makes it very special for me is that my plenum is #100 produced! Install will likely happen next weekend.
	Appreciate 2 SnohoRaptor534.50 jacksonE9232.50 Quote

07-01-2022, 01:10 PM	#418
Grippinaround Private First Class 25 Rep 153 Posts Drives: e92 m3 Join Date: Dec 2018 Location: Socal iTrader: (2)	This wait is killing me!! __________________ E92 M3 DCT
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