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BMW 3-Series (E90 E92) Forum
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See and Hear GruppeM Intake on video
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| 08-01-2006, 11:13 PM | #24 | |
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| 08-01-2006, 11:18 PM | #26 | |
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| 08-01-2006, 11:34 PM | #30 |
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Major General
 
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I'm assuming that the surface area of the filter element is greater than that of the stock filter (i.e., less resistance). It's sort of like the reason why the small intestine has microscopic fingerlike projections--to increase surface area. The large volume of space within the heat shield probably minimizes air resistance when the engine needs it. Cold air is more dense, and provides more O2 for combustion with fuel, hence more HP. I got a kick after I installed the CF front air vents that are positioned in front of the radiator. Not sure it came out too clearly in the video, but you can see how they extend downward so that air entering the kidney grilles is actually scooped into the air intake. Real cool design. I also like the fact that if I can figure out a way to duct air through the driver's side front fender well (plastic), perhaps through the brake duct, I might be able to get more cold air in there. Of course, I can always remove the left headlight. Heh.
To be honest, I would have been happy had the shield been made out of plastic, and had saved me 500 bucks or so. I was so worried I might scratch the CF.
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| 08-01-2006, 11:50 PM | #32 |
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frog: great informative post as always. I was thinking, you have been playing around w/ laying glass you might be able to make something that can route air from the fender to the intake snorkle.
I need to find some shots of the engine bay of the BMW Touring cars of yester year, they had a really nice setup for their air box |
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| 08-02-2006, 02:44 AM | #33 | |
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Brigadier General
Drives: 08 E92, O7 E90 Join Date: Apr 2006
Location: ANTELOPE VALLEY
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| 08-02-2006, 12:40 PM | #35 | |
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Major General
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haha that's not what I meant. I am not hearing that britalman intakes suck (per Diesel) thus the comment. I wasnt expecting it to be as good as the GruppeM (duh!) fuck I hope it wont be so bad :mad: |
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| 08-02-2006, 02:28 PM | #36 | |
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Brigadier General
Drives: 08 E92, O7 E90 Join Date: Apr 2006
Location: ANTELOPE VALLEY
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| 08-03-2006, 10:29 AM | #37 |
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Major
 
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Nice job Michael!
 Sounds really nice, and the gains are there. I'm not familiar with how the 330 sounds, but it sounds a lot meaner than my stock 325.
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E90 Mods (work in progress): Euro Xenon Headlamps, 19" ASA AR-1's with Toyo T1R 235 fronts and 275 rears, Breyton style front spoiler, Breyton style rear spoiler, Huper Optik 40% Tint, TiAG with Black 'ette and Aluminum trim, Chrome grills, chrome exhaust, Hartge lowering springs, PMB Hyperwhites. |
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| 08-03-2006, 10:32 AM | #38 |
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Major General
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well, Gilda commented last night, "your car is too loud now."
When driving around town, say in 3rd gear, 2600+ rpm resonates with a deep tone. Above 3000 rpm, you can hear the air being sucked into the intake (windows rolled down)--not that loud.
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| 08-03-2006, 10:38 AM | #39 | |
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Captain
Drives: 330i rec'd 2/17/06 Join Date: Dec 2005
Location: Los Angeles, CA
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JB | BBS CHs | Blacklines | HO40 | ACS Rep Roof Spoiler | H&R Sport | Hartge Rep Lip | OEM Strut Bar | M-Tech Rear
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| 08-03-2006, 02:22 PM | #40 | |
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Major General
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Then I was waiting for her to stop talking so I could hear the air sucking sounds.
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| 08-03-2006, 02:41 PM | #41 |
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Major General
Drives: 2006 325xi Join Date: Aug 2005
Location: South Central Connecticut
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What was the final price that you paid for the parts?
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19" Breyton Race GTS Matt Grey, Eisenmann 4x70 Exhaust with SR Pipes. Vorsteiner Hood, Bilstein Shocks, CFEverywhere, mtec rear, Carbon Fiber Headlights |
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| 08-03-2006, 02:56 PM | #42 | |
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 Women!  Mia gave me the same comment on my intake. Gotta love em. 
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| 08-03-2006, 05:30 PM | #43 |
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Major
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hehe. my best friend has an 05 330 ZSP, and his wife said, "the thing I luv about the car is its sound. It has a nice growl."
And the funny thing is, my friend doesn't even notice these things. Yup, she wears the pants in the house.
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E90 Mods (work in progress): Euro Xenon Headlamps, 19" ASA AR-1's with Toyo T1R 235 fronts and 275 rears, Breyton style front spoiler, Breyton style rear spoiler, Huper Optik 40% Tint, TiAG with Black 'ette and Aluminum trim, Chrome grills, chrome exhaust, Hartge lowering springs, PMB Hyperwhites. |
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| 08-08-2006, 12:07 PM | #44 |
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Major General
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the price of power
Just to give an update...
Questions have popped up on intake threads regarding gas mileage. I noticed that on average, my city gas consumption decreased from around 19 to 18 mpg (computer figure). Spirited driving decreased my mpg to around 17 (note: I had never seen my gas mileage dip below 19 prior to this), and after a friend of mine test drove the car aggressively,my car displayed 13.2 mpg on the comp. By the way, I did reset the gas mileage computer before testing. A synopsis of the dyno showed a max wheel HP increase of 5.5 HP at around 6660 rpm. Torque at that rpm increased 6.64 ft-lbs, but was even greater at around 2850 rpm (approx 8 ft-lbs)--the rpm the engine noise seems to be much more noticeably loud. Both HP and torque after the mod increased throughout the rpm band, and regardless of what anyone cares to say about butt dynos, I trust my seat-of-the-pants impression that this car is more responsive. Over the past week or so, I have been monitoring my gas consumption relative to driving habits. I consistently achieved 20.1 mpg city in South Bay stop-in-go traffic by driving very conservatively, and not exceeding 2500 rpm before shifting. I would cruise in neutral while stopping, mild-to-moderately accelerate to cruising speed, and avoid temptation to aggressively pass anyone unless my speed from momentum allowed this. In short, this intake is "sucking in" more air and gas, but proportional to the OEM intake (see dyno), which translates into more power and torque at the expense of gas mileage. If you drive aggressively, you'll pay in the form of poor gas mileage. From what I can see, if you drive conservatively, you can achieve practically stock-like gas mileage figures. The physics behind the gas consumption is similar to modding a normally aspirated engine with a 2-barrel carb with a 4-barrel one.
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Nikki
