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      11-10-2011, 04:03 PM   #8361
shaq diesel
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Sara, they are doing a member-day Sunday?
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      11-10-2011, 04:33 PM   #8362
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Other than Phuoc and John (already have yours), everyone send me their addresses. Christmas Card time is coming.
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      11-10-2011, 05:45 PM   #8363
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My boss is racing his porsche Sunday at the track. Come on down
what track? the new one?
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      11-10-2011, 06:32 PM   #8364
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Not the dome lights? You mean the side markers right?
Yes
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      11-11-2011, 04:37 AM   #8365
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Anyone going to Nola Motorsports Saturday? Going out to practice some techniques with my camera and my karting skills!
what time are they doing the karting?
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      11-11-2011, 04:44 AM   #8366
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what time are they doing the karting?
10am-4pm. Then they do a races at 4:30.
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      11-11-2011, 12:50 PM   #8367
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So it was nice driving to Hammond. Thanks Grant, Now my 1st gear and 2nd gear and 3rd gear and 4th gear r doing 15-17psi LOL!
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My life is complete. Yodaime has commented on a post with my car in it.
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      11-11-2011, 03:47 PM   #8368
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Headed up for a Red Bluff drive, tomorrow AM if anyone is interested.
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      11-11-2011, 04:31 PM   #8369
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So it was nice driving to Hammond. Thanks Grant, Now my 1st gear and 2nd gear and 3rd gear and 4th gear r doing 15-17psi LOL!
I need you to unclip that plug in my car tonight.
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      11-11-2011, 06:39 PM   #8370
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Quote:
Originally Posted by Sara504 View Post
I need you to unclip that plug in my car tonight.
Geez. Why didn't you just let me do that when you first got the car. I told you it doesn't do anything. It's proven that it doesnt and also BMW themself told me it when I got my first 335i. It's not a major mod or even a mod itself. It's there for comfort and sound. Most guys leave it because they love their car stock and don't want that extra noise to it. And those guys don't go on this forum.
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My life is complete. Yodaime has commented on a post with my car in it.
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      11-12-2011, 09:18 AM   #8371
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Geez. Why didn't you just let me do that when you first got the car. I told you it doesn't do anything. It's proven that it doesnt and also BMW themself told me it when I got my first 335i. It's not a major mod or even a mod itself. It's there for comfort and sound. Most guys leave it because they love their car stock and don't want that extra noise to it. And those guys don't go on this forum.
I did it and it sounds better. My one and only "mod"
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      11-12-2011, 10:35 AM   #8372
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Quote:
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Geez. Why didn't you just let me do that when you first got the car. I told you it doesn't do anything. It's proven that it doesnt and also BMW themself told me it when I got my first 335i. It's not a major mod or even a mod itself. It's there for comfort and sound. Most guys leave it because they love their car stock and don't want that extra noise to it. And those guys don't go on this forum.
There actually is a reason for that exhaust flap being there. Ferrari is also known to use exhaust flaps on some of there cars. You didnt think BMW would put that there just for sound or to "heat one catalytic converter" did you? BMW put this flap there for exhaust velocity. Exhaust design for power is a compromise between exhaust momentum/inertia for scavenging and low pressure drop/piping losses.

At low RPM the exhaust velocity is low (relative). The pressure drop is proportional to the square of the velocity. Therefore the power loss contribution due to frictional losses is low (again, relative), so it is more important to keep the velocity high. On this same note, the idea that you need any amount of backpressure is also false.

At high RPM the pressure drop is the main contributing factor to power loss, so the flap allows a lower velocity in order to lower frictional losses.
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      11-12-2011, 10:39 AM   #8373
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By the way, its not bad for the car. I just wanted to make it clear that it is indeed functional.
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      11-12-2011, 10:52 AM   #8374
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So it seems as if, I'm the first N54 tranny/clutch change in baton rouge. If any of you EVER have to do a clutch, German Auto is probably going to be the only person that have the OEM alignment tool. So no car until Tuesday
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      11-12-2011, 11:29 AM   #8375
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They also have the BMW specific tool to align the cams and check the dual vanos solenoids on an S54. I'd recommend going to them for service if you are out of warranty. They are good people
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      11-12-2011, 11:29 AM   #8376
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Quote:
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Yes
Yea I know. The manufacturer wanted me to try them out, I'm like ehhhhh
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      11-12-2011, 01:15 PM   #8377
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Quote:
Originally Posted by Sleeper Sedan View Post
There actually is a reason for that exhaust flap being there. Ferrari is also known to use exhaust flaps on some of there cars. You didnt think BMW would put that there just for sound or to "heat one catalytic converter" did you? BMW put this flap there for exhaust velocity. Exhaust design for power is a compromise between exhaust momentum/inertia for scavenging and low pressure drop/piping losses.

At low RPM the exhaust velocity is low (relative). The pressure drop is proportional to the square of the velocity. Therefore the power loss contribution due to frictional losses is low (again, relative), so it is more important to keep the velocity high. On this same note, the idea that you need any amount of backpressure is also false.

At high RPM the pressure drop is the main contributing factor to power loss, so the flap allows a lower velocity in order to lower frictional losses.
Oh my bad son, I didn't realise that when you told me at your college lol.
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My life is complete. Yodaime has commented on a post with my car in it.
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      11-12-2011, 01:18 PM   #8378
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Oh my bad son, I didn't realise that when you told me at your college lol.
I wasn't directly speaking at you, I was just letting everyone know. I took a video of your car, Ill email it to you.
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      11-12-2011, 01:18 PM   #8379
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They also have the BMW specific tool to align the cams and check the dual vanos solenoids on an S54. I'd recommend going to them for service if you are out of warranty. They are good people
thats where it is. That why i say they'll have the tool now. They had to order it in order to finish installing my clutch.
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      11-12-2011, 01:29 PM   #8380
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http://www.e90post.com/forums/showthread.php?t=610343
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I have exhaust and an intake...
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      11-12-2011, 01:39 PM   #8381
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Quote:
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I wasn't directly speaking at you, I was just letting everyone know. I took a video of your car, Ill email it to you.
LOL Who is this guy? (;
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My life is complete. Yodaime has commented on a post with my car in it.
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      11-12-2011, 01:42 PM   #8382
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Good shit Todd. Tell me to do catless dp. let's see if he can handle 1 day lol.
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My life is complete. Yodaime has commented on a post with my car in it.
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