3-Port Boost Solenoid vs MBC
Dec 10, 2009, 05:10 PM
#63
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
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?
Dec 14, 2009, 09:25 AM
#66
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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. 
Dec 16, 2009, 08:32 AM
#69
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^^ 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..
