3-Port Boost Solenoid vs MBC

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Dec 10, 2009 | 04:55 PM
  #61  
30% = 23
35% = 26+ (we stopped because it looked like it was going to keep going)

basically it looked like it was going to be too sensitive...
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Dec 10, 2009 | 05:01 PM
  #62  
Quote: 30% = 23
35% = 26+ (we stopped because it looked like it was going to keep going)

basically it looked like it was going to be too sensitive...
Ah interesting. So it would probably be too sensitive with error correction as well.

- Bryan
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Dec 10, 2009 | 05:10 PM
  #63  
Quote: ok so we tried the EGR 3port from a EvoIX last night.

hrmm not so good, wgdc of 30% netted 23psi, and 35% kept going (ie we stopped the pull)

swapped the tactrix in and 65% gave a predictable 25psi...

In the end we went back to the stock setup since the extra boost from the 3port made the same kw from the twin setup with less boost (but more timing)

I still think the 3port is better because it gives you much finer grain control over your boost curve.

stock setup isn't bad, but for me 3port is still better


Can you post up a plot of the 3port boost curve vs the twin setup?
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Dec 10, 2009 | 05:15 PM
  #64  
^^ Yeah that would be a problem too, don't take my word thou since we had a few problems last night and were a bit rushed, so maybe a more exhaustive test is in order...

^ I am just asking the tuner for the logs now...
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Dec 14, 2009 | 09:05 AM
  #65  
bump
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Dec 14, 2009 | 09:25 AM
  #66  
Quote: Can you post up a plot of the 3port boost curve vs the twin setup?
FWIW, mine changed none except 0.5-1.0 psi more at redline (7000 rpm in my case) and fewer boost spikes when I nail it at peak torque. Otherwise, the stock bleed setup worked just fine. Spool up decreased approximately 150-200 rpm in 4th and 5th.
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Dec 16, 2009 | 06:33 AM
  #67  
Quote: FWIW, mine changed none except 0.5-1.0 psi more at redline (7000 rpm in my case) and fewer boost spikes when I nail it at peak torque. Otherwise, the stock bleed setup worked just fine. Spool up decreased approximately 150-200 rpm in 4th and 5th.
so your point is?
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Dec 16, 2009 | 07:39 AM
  #68  
how about perrin 3port ? is it good ?
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Dec 16, 2009 | 08:32 AM
  #69  
^^ i have the perrin..it is good enough...but from 5500rpm it started falling from 26psi to 18psi to 7k rpm...the wgdc was around 90-95% in that rpm range..i think the turbo cant breathe anymore..
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Dec 18, 2009 | 05:40 AM
  #70  
So is the oem 3 port good or not?
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Dec 18, 2009 | 07:32 PM
  #71  
By the way, is this based on the GM 3 ports?

http://www.machevo.com/mavbocoso.html
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Dec 19, 2009 | 12:12 AM
  #72  
Quote: By the way, is this based on the GM 3 ports?

http://www.machevo.com/mavbocoso.html
No that is the pierburg.

- Bryan
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Feb 2, 2010 | 03:32 PM
  #73  
There is some great info in this thread guys, thank you for keeping the community informed.

Will
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Feb 2, 2010 | 04:07 PM
  #74  
I like the 3 port. It allows your ecu to control the boost and it holds more boost then your usual MBC
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Feb 3, 2010 | 09:01 AM
  #75  
Sorry if this has been posted before.
Do you still need the pill on a 3 port setup (interrupt mode)?
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