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E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

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  #1  
Old 10-28-2011, 06:21 PM
335ixGuy 335ixGuy is offline
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Lack of boost gauge in 335i

Any reason why BMW did not outfit the 335 with a turbo boost gauge? Now that the air is getting cold and crisp, I wonder how my boost my car is making stock. Anyone have any real world feedback? Damn she pulls hard in 38 degree weather :-)

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  #2  
Old 10-28-2011, 06:59 PM
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CT CT is offline
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They're really just unnecessary for the masses. It just goes, right?

Boost gauges are also incredibly distracting. Hard to stop staring at it.
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  #3  
Old 10-28-2011, 09:22 PM
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SD Z4MR SD Z4MR is offline
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Quote:
Originally Posted by 335ixGuy View Post
Any reason why BMW did not outfit the 335 with a turbo boost gauge? Now that the air is getting cold and crisp, I wonder how my boost my car is making stock. Anyone have any real world feedback? Damn she pulls hard in 38 degree weather :-)
If you really want one:

Turner Motorsports makes an analog gauge that replaces the left side middle vent: http://www.turnermotorsport.com/p-22...ost-gauge.aspx.

ECS Tuning has three, two similar to the above: http://www.ecstuning.com/BMW-E92-335...h/Boost_Gauge/

Bavarian Autosport also has a similar one that isn't linkable.

Someone else has a digital gauge that replaces the left driver vent but I don't recall where I saw it.
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  #4  
Old 10-29-2011, 07:11 AM
jelliotlevy jelliotlevy is offline
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If it's any consolation, many high performance cars do not use boost gauges. From my personal ownership experience:
1989 Mazda MX-6 GT turbo
1993 Mazda RX-7 twin turbo
1998 Mazda Millenia supercharged
2004 Volvo S60R turbo
2008 and 2011 335i, twin turbo and twin power turbo

I am not sure what I personally would do with a boost gauge if I had one.
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  #5  
Old 10-29-2011, 08:55 AM
Tom K. Tom K. is offline
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At least you guys get an oil temp gauge, unlike us poor neglected 328i drivers.

Tom
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  #6  
Old 10-29-2011, 09:21 AM
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DSXMachina DSXMachina is offline
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Your boost will be the same regardless of whether it's 30F or 90F outside. Boost is limited by the computer, not by ambient temperature. Theoretically you are correct if the turbo wheel itself is designed to produce less boost. In that case denser air would result in more boost. However, our turbos can produce far more boost than the engine management computer will allow to reach the intake. Therefore colder air, in and of itself, does not produce more boost at the intake. A waste gate makes sure of that. The turbo is stupid, the computer is smart.
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  #7  
Old 10-29-2011, 09:23 AM
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DSXMachina DSXMachina is offline
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Quote:
Originally Posted by Tom K. View Post
At least you guys get an oil temp gauge, unlike us poor neglected 328i drivers.

Tom
Yeah, and you've read all the trouble that causes!
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  #8  
Old 11-03-2011, 01:29 PM
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ECSTuning ECSTuning is offline
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Quote:
Originally Posted by 335ixGuy View Post
Any reason why BMW did not outfit the 335 with a turbo boost gauge? Now that the air is getting cold and crisp, I wonder how my boost my car is making stock. Anyone have any real world feedback? Damn she pulls hard in 38 degree weather :-)

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I've got a solution for you, our ECS Tuning vent pods allow for mounting of 45mm gauges in the center vents of your 335i!

Drivers side


Passenger side



Part of the fun with finding aftermarket gauges is having them blend in properly. We spent waaaay too much time and effort making sure our ECS Tuning Boost gauge matches the orange/red glow of BMWs stock lighting, nothing bothers me more than having something that's kinda close but not really a match with my interior light. Our Boost gauge is a dead ringer for the BMW colored lighting.

Below is a night shot of our 335i with the gauge lit!


If you have any questions feel free to blast me a PM,

ECS Tuning
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Last edited by ECSTuning; 11-03-2011 at 01:33 PM.
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  #9  
Old 09-04-2012, 05:44 PM
91BMW325i 91BMW325i is offline
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Android Torque app

Has anybody tried the Torque app for android with an obd ii bluetooth adapter to see the amount of boost or will it be to slow?
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  #10  
Old 09-04-2012, 06:58 PM
pmcu pmcu is offline
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Quote:
Originally Posted by Tom K. View Post
At least you guys get an oil temp gauge, unlike us poor neglected 328i drivers.

Tom
FYI, 328i *does* have an oil temp gauge. At least it did in 09
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  #11  
Old 09-04-2012, 07:02 PM
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CALWATERBOY CALWATERBOY is offline
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Quote:
Originally Posted by DSXMachina View Post
Your boost will be the same regardless of whether it's 30F or 90F outside. Boost is limited by the computer, not by ambient temperature. Theoretically you are correct if the turbo wheel itself is designed to produce less boost. In that case denser air would result in more boost. However, our turbos can produce far more boost than the engine management computer will allow to reach the intake. Therefore colder air, in and of itself, does not produce more boost at the intake. A waste gate makes sure of that. The turbo is stupid, the computer is smart.

DSX, your return is most welcome.

Now, then. Stupid, you say? Vanes not variable?
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  #12  
Old 09-04-2012, 07:07 PM
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CALWATERBOY CALWATERBOY is offline
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Quote:
Originally Posted by 335ixGuy View Post
Any reason why BMW did not outfit the 335 with a turbo boost gauge? Now that the air is getting cold and crisp, I wonder how my boost my car is making stock. Anyone have any real world feedback? Damn she pulls hard in 38 degree weather :-)

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Wait for Bluetooth Google Glasses. Xmitters at the OBD port have been around some time; displayed in stereo as a HUD. Shazam! Iron Man peripheral instruments.

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  #13  
Old 09-05-2012, 01:10 AM
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Zooks527 Zooks527 is online now
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Quote:
Originally Posted by 91BMW325i View Post
Has anybody tried the Torque app for android with an obd ii bluetooth adapter to see the amount of boost or will it be to slow?
Yup. Response is fairly quick.

Note, the placement of the OBD port on the BMW is such that if you use a dongle on a regular basis, you will forget it's there at some point and kick it while getting in or out, breaking either the port connector or the dongle. If you get one, you may wish to get an adapter cable that will place the whole thing someplace less obstructive.
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  #14  
Old 09-05-2012, 07:55 AM
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E92-Lighting E92-Lighting is offline
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no need for a boost gauge, just open your windows!
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  #15  
Old 09-05-2012, 07:59 AM
91BMW325i 91BMW325i is offline
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Thanks Zooks527 I will try that out. At least the port is placed better than my e46 wagon.
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  #16  
Old 02-12-2013, 04:11 PM
Trick61 Trick61 is offline
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Quote:
Originally Posted by ECSTuning View Post
I've got a solution for you, our ECS Tuning vent pods allow for mounting of 45mm gauges in the center vents of your 335i!

Drivers side


Passenger side



Part of the fun with finding aftermarket gauges is having them blend in properly. We spent waaaay too much time and effort making sure our ECS Tuning Boost gauge matches the orange/red glow of BMWs stock lighting, nothing bothers me more than having something that's kinda close but not really a match with my interior light. Our Boost gauge is a dead ringer for the BMW colored lighting.

Below is a night shot of our 335i with the gauge lit!


If you have any questions feel free to blast me a PM,

ECS Tuning
Hey guys. A buddy of mine just bought one of these knowing nothing about his N55. I'm familiar with them and the fact that they use the variable valve lift that produces no vacuum in the system. So... is there any way to use a boost gauge in this type of setup? The only thing that I can think of is to tap straight into the charge pipe but then again... with the variable valve lift, will it even register as boost or vacuum???? Help would be appreciated.
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  #17  
Old 02-12-2013, 04:17 PM
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fun2drive fun2drive is offline
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Variable valve lift = VANOS do you mean?
Yes you get both vacuum and boost on those gages that measure both.
What was useful for my boost gage was to determine if the boost was what it was supposed to be.
In the case of the 335 it is much higher than my old SC 325 but less than my Ford SuperDuty...
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  #18  
Old 02-12-2013, 09:49 PM
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CALWATERBOY CALWATERBOY is offline
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Quote:
Originally Posted by 335ixGuy View Post
Any reason why BMW did not outfit the 335 with a turbo boost gauge? Now that the air is getting cold and crisp, I wonder how my boost my car is making stock. Anyone have any real world feedback? Damn she pulls hard in 38 degree weather :-)

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Impressive!

But you are not a Jedi yet.

When you feel it in your wah, grokking boost with perfect calm, you will know without effort.

.

Last edited by CALWATERBOY; 02-12-2013 at 09:51 PM.
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  #19  
Old 02-13-2013, 03:27 AM
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CT CT is offline
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Quote:
Originally Posted by CALWATERBOY View Post
Impressive!

But you are not a Jedi yet.

When you feel it in your wah, grokking boost with perfect calm, you will know without effort.

.
No mere man can grok boost with calm - the result of such grokking is always the infinite enthusiasm of childhood.
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  #20  
Old 02-13-2013, 06:37 AM
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bear-avhistory bear-avhistory is offline
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Waste of money. I have a gauge hijack & hardly ever look at it. Pure stock going up to about 8psi its not much of a show . Testing a new map its useful, but not necessary because you can always print a log with the data.
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  #21  
Old 02-13-2013, 07:39 AM
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floydarogers floydarogers is offline
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Quote:
Originally Posted by fun2drive View Post
Variable valve lift = VANOS do you mean?
No. Variable lift and duration is a function of Valvetronic (on the N52 & N55, not N54). VANOS is variable valve TIMING, and is separate (and is on all BMW engines for the last 15-20 years).

In any case, boost is generally manifold pressure (above ambient atmospheric) and doesn't directly have much to do with cylinder pressure.
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  #22  
Old 02-13-2013, 08:02 AM
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E92-Lighting E92-Lighting is offline
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i do like the boost tho, it sounds sexy at wot
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  #23  
Old 02-17-2013, 10:50 PM
marine24 marine24 is offline
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Talking

Quote:
Originally Posted by 335ixGuy View Post
Any reason why BMW did not outfit the 335 with a turbo boost gauge? Now that the air is getting cold and crisp, I wonder how my boost my car is making stock. Anyone have any real world feedback? Damn she pulls hard in 38 degree weather :-)

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because it isn't a riced out Honda Civic
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  #24  
Old 02-17-2013, 10:54 PM
marine24 marine24 is offline
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Quote:
Originally Posted by DSXMachina View Post
Your boost will be the same regardless of whether it's 30F or 90F outside. Boost is limited by the computer, not by ambient temperature. Theoretically you are correct if the turbo wheel itself is designed to produce less boost. In that case denser air would result in more boost. However, our turbos can produce far more boost than the engine management computer will allow to reach the intake. Therefore colder air, in and of itself, does not produce more boost at the intake. A waste gate makes sure of that. The turbo is stupid, the computer is smart.
The colder air would reduce the IAT though, giving a denser charge wouldn't it? Or is it academic seeing as compressing the air raises the temp anyways?
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  #25  
Old 02-18-2013, 02:13 AM
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Zooks527 Zooks527 is online now
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Quote:
Originally Posted by marine24 View Post
The colder air would reduce the IAT though, giving a denser charge wouldn't it?
Yes.

Quote:
Originally Posted by marine24 View Post
Or is it academic seeing as compressing the air raises the temp anyways?
No, as if all other things but the initial temperature are equal, the temperature rise is a fixed percentage of the initial air temperature, so the final air temperature will be lower if the starting air temperature is lower.
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Prior 33 years of cars: 1967 BelAir wagon / 1968 LeMans Tempest / 1970 Mustang Mach 1 / 1972 El Dorado / 1978 Corvette (kept until first Bronco) / 1981 Subaru GL wagon AWD / 1983 s10 Blazer 4x4 (big mistake) / 1985 Bronco 4x4 / 1996 Bronco 4x4 / 2004 Passat 4motion

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