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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Mon, Jan-13-2020, 04:39:30 AM   #191
HassanEido
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Default Re: Turner CSL intake?

The airbox only sounds like one when your are at wot at load. Meaning the car sounds stock in your daily drive unless you get on it,in which case the csl flap opens anyway. A snorkel is really all you need.

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Custom exhaust thread and dyno http://m3forum.net/m3forum/showthread.php?t=569086
Cams thread and dyno http://m3forum.net/m3forum/showthread.php?t=554439
Custom cf airbox thread http://m3forum.net/m3forum/showthread.php?t=595180
Why not to use after market bearings with surfacetreatments and /or increased clearance
http://www.m3forum.net/m3forum/showp...4&postcount=10
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Old Mon, Jan-13-2020, 05:00:17 AM   #192
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Default Re: Turner CSL intake?

Quote:
Originally Posted by usdmej View Post
it adds a decent level of refinement to the daily drive while letting the the car still roar when you're really on it. if i couldn't run a flap i'd just go back to the stock intake



again, just my opinion, and food for thought
That's not proven. Tuners can tune "refinement" without flap.


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Engine · Karbonius CSL Airbox (1x1) w/ Snorkle · CSL-spec DME · Kassel MAP sensor · Kassel Tuned · Supersprint Street Section 3
Suspension · JIC Cross/ZMS RS coilovers · GC Weight Jackers · SDW RTAB Monoball · Corner balanced
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Exterior · OE CSL trunk · Mile End (JCSL) Diffuser · OE LED taillights
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Old Mon, Jan-13-2020, 04:21:32 PM   #193
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Default Re: Turner CSL intake?

Quote:
Originally Posted by fattycharged View Post
I run a snorkel most of the time, Geoff Steele version, it keeps it almost silent till I get on it.

Does the OE flap then make it less audible than a stock intake?


there are two inake tracts on an OE CSL airbox

- the one everyone sees is the huge opening that the snorkel attaches to. the snorkel barely funtions like one because it doesn't attach around the entire circumference of the opening. it also does little to nothing to muffle airbox sound (if you're not using a flap)


- the second intake path is upstream of that large opening and faces downward (it's not visible when the airbox is installed). it's a relatively small opening and attaches to at least 4-5 feet of tubing of varying diameters and materials, essentially an intake resonator. when the CSL flap is closed, you're only pulling air through that muffled tract. when the flap is opened the intake will pull through the path of least resistance, the main opening which is passively ram air fed by the "snorkel"


it's the use of these two unique intake paths that gives that "jeckyl and hyde" feeling when you run the flap properly setup. i can't say that the sound when the flap is closed is quieter than a stock intake, but what that quieter track does is exaggerate the sound delta when the flap actually opens. this adds the refinement i was talking about earlier.


i suspect that people that don't notice a difference when they try the flap are not running the additional CSL ducting on the smaller intake tract. sure, it's easy to say the intake is quiet when you're gentle with the throttle and loud when your'e on it. but to a lesser extent that's like running a loud muffler and saying, "well it's much quieter if you're easy on the throttle".


the Turner intake doesn't appear to have provisions for the snorkel or the second intake tract so this is all kind of moot. but at the same time i think it's information that could help people make a more informed decision so i thought i'd write it in this thread


again this is my opinion based on my experience and through bmw literature. i'm not trying to sway people one way or the other
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Old Mon, Jan-13-2020, 04:27:23 PM   #194
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Default Re: Turner CSL intake?

I've been running without the flap for a while now (largely because my actuator failed and I didn't feel like replacing it), and I'd say the Jekyll/Hyde feeling is still there.

I'd say the volume difference with throttle is far more pronounced than on an exhaust.
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Old Mon, Jan-13-2020, 04:36:06 PM   #195
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Default Re: Turner CSL intake?

There's factually no difference in performance with of without a flap. Dyno and draggy tested at full tilt the flap is open, and sooner in sport mode.

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Mods:
-Custom CF airbox
-SSV2 catless headers(with a modified collector extention), Custom 2.5" dual sec1, Custom sec2 2.5" dual with e9xM X pipe, SuperSprint Race inspired custom section 3..
-Cat Cams 280 272.
-Custom dyno tune
-Tms pulleys and electric fan conversion
385.7 whp 288 wtq

Custom exhaust thread and dyno http://m3forum.net/m3forum/showthread.php?t=569086
Cams thread and dyno http://m3forum.net/m3forum/showthread.php?t=554439
Custom cf airbox thread http://m3forum.net/m3forum/showthread.php?t=595180
Why not to use after market bearings with surfacetreatments and /or increased clearance
http://www.m3forum.net/m3forum/showp...4&postcount=10
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Old Mon, Jan-13-2020, 04:43:30 PM   #196
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Default Re: Turner CSL intake?

Quote:
Originally Posted by HassanEido View Post
There's factually no difference in performance with of without a flap. Dyno and draggy tested at full tilt the flap is open, and sooner in sport mode.

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Not no difference-- every dyno we've yet seen shows less power when the flap is closed.
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Old Mon, Jan-13-2020, 04:49:58 PM   #197
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Default Re: Turner CSL intake?

Quote:
Originally Posted by Obioban View Post
Not no difference-- every dyno we've yet seen shows less power when the flap is closed.
I misspoke, I meant to say with it there and open, which is what happens in sport mode at wot. It definately loses power if it's closed. It acts as an intake restriction again, defeating the whole point of the csl airbox

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Mods:
-Custom CF airbox
-SSV2 catless headers(with a modified collector extention), Custom 2.5" dual sec1, Custom sec2 2.5" dual with e9xM X pipe, SuperSprint Race inspired custom section 3..
-Cat Cams 280 272.
-Custom dyno tune
-Tms pulleys and electric fan conversion
385.7 whp 288 wtq

Custom exhaust thread and dyno http://m3forum.net/m3forum/showthread.php?t=569086
Cams thread and dyno http://m3forum.net/m3forum/showthread.php?t=554439
Custom cf airbox thread http://m3forum.net/m3forum/showthread.php?t=595180
Why not to use after market bearings with surfacetreatments and /or increased clearance
http://www.m3forum.net/m3forum/showp...4&postcount=10
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Old Mon, Jan-13-2020, 04:55:45 PM   #198
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Default Re: Turner CSL intake?

Quote:
Originally Posted by terraphantm View Post
I've been running without the flap for a while now (largely because my actuator failed and I didn't feel like replacing it), and I'd say the Jekyll/Hyde feeling is still there.

for sure the jeckyll/hyde feeling is still there, just less pronounced. are you running the extra ducting to the smaller tract? my biggest pet peeve without the flap is when you need just a little more speed than usual but still want to be discreet (like trying to beat a red light). without the flap i felt like i was barking at traffic too much.


i found a picture of the complete CSL ducting. it shows the muffling effect the tubing provides





Quote:
Originally Posted by HassanEido View Post
It acts as an intake restriction again, defeating the whole point of the csl airbox
BMW went through a lot of trouble to stick to the ethos of this car (sporty but refined). i think you're ignoring their efforts to make it civilized when you want it to be civilized.



but yea if all you care about is full throttle noise making then all of this is unnecessary. you could always ask your tuner to "tune" in more refinement too
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Old Mon, Jan-13-2020, 05:14:10 PM   #199
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Default Turner CSL intake?

Quote:
Originally Posted by usdmej View Post
but yea if all you care about is full throttle noise making then all of this is unnecessary. you could always ask your tuner to "tune" in more refinement too

LOL. Anyone with an airbox should have it tuned anyway. “Refinement” is one of the goals of any tune airbox or not.
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/// 2002 Jet Black · 6MT · Cinnamon

Engine · Karbonius CSL Airbox (1x1) w/ Snorkle · CSL-spec DME · Kassel MAP sensor · Kassel Tuned · Supersprint Street Section 3
Suspension · JIC Cross/ZMS RS coilovers · GC Weight Jackers · SDW RTAB Monoball · Corner balanced
Wheels/Brakes · BBS E88 18"x9.5"/10.5" · Michelin Pilot Sport 4S 245/40/18 275/35/18 · 996 Brembo BBK w/ CSL/ZCP Rotors F+R · Apex studs
Exterior · OE CSL trunk · Mile End (JCSL) Diffuser · OE LED taillights
Interior · Avin Avant 4 · Llumar Air 80 Tint

Next: Mile End (JCSL) bumper
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Old Mon, Jan-13-2020, 05:23:58 PM   #200
Steve M3
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Default Re: Turner CSL intake?

I don't run any of the ducting on mine. I control the volume with my right foot. It goes from very stock sounding to very pronounced with a quick jab
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Discussing Turner CSL intake? in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)