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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Boost Gauge Observations



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      06-18-2008, 07:09 AM   #1
Mike07335i
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Boost Gauge Observations

Well I got my new boost gauge (digital) from Rick , along with the famous gauge pod, and hooked everything up last night. Actually went relatively easily with the only minor issue being taking some of the interior trim off. The engine work was a breeze. Was nice to get my hands dirty as I haven't worked on the car in a while.

So, I drove into work today in moderate traffic, with some highway. Didn't floor the car but more like very conservative driving due to traffic, and the shocking thing was I hardly made boost all trip. I peaked at 2.1PSI, and only got on the boost 3-4 times. Didn't expect that.

I haven't calibrated the gauge to ambient pressure yet, but last night I did some runs and she registered 7-8 PSI (I am stock) so the gauge is reading properly. Any of you guys with boost gauges have the same observations?

Mike

P.S. Thumbs up to Rick for some great service and a great product!!
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      06-18-2008, 07:13 AM   #2
RiXst3r
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Glad you like the guage... your observations sound about right for a stock car.
Don't forget to keep your eyes on the road!

Thanks again
-Rick
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      06-18-2008, 07:33 AM   #3
scottp999
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Good post. Yes, if you don't really get on the accelerator, the turbos don't really build any pressure. It's kind of nice to know that when driving normally we are not putting the system under stress from pressure.

It gives me much peice of mind to be able to see what is going on.

Thanks for the product offering Rick.
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      06-18-2008, 08:29 AM   #4
e90AW335i
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Recalibrate it and try again, but your findings seem normal....
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I install all tunes, intakes, o2 simms, and most cosmetic mods. PM me for a quote.
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      06-18-2008, 08:32 AM   #5
Blk07335i
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+1 Running V2. Most of the time with conservative driving the car runs vacuum.
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      06-18-2008, 09:37 AM   #6
lawdude
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Told my secretaries to try not to schedule anything for tomorrow morning. Will install it then. I assume this is no more than a morning job.
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      06-18-2008, 09:44 AM   #7
Mike07335i
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Quote:
Originally Posted by lawdude View Post
Told my secretaries to try not to schedule anything for tomorrow morning. Will install it then. I assume this is no more than a morning job.
Took me just over an hour to get everything in and then re-assmbled the interior, and I went slow.

Mike
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      06-18-2008, 09:45 AM   #8
lawdude
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Quote:
Originally Posted by Mike07335i View Post
Took me just over an hour to get everything in and then re-assmbled the interior, and I went slow.

Mike
Thank you sir. Do you have AT or MT?
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      06-18-2008, 10:13 AM   #9
Mike07335i
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Quote:
Originally Posted by lawdude View Post
Thank you sir. Do you have AT or MT?
MT..

Mike
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      06-18-2008, 10:18 AM   #10
andrewflk
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Keep in mind that when you see 0-psi you are still boosting. On an N/A car you would be running a significant vacuum.
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      06-18-2008, 10:31 AM   #11
Mike07335i
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So when I am idling or off the throttle I see about 20-22 PSI of vacuum. So at what point in the vacuum/boost area are the turbos adding hp?

Mike
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