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Old 10-27-2014, 02:32 PM   #1
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Post Boost controller + WMI info

First, no Tom I don't tune specifically for my WMI setup.

(the story)
Time for everyone to learn from my mistake/shortsightedness and possibly save a motor. Thank fully mine was not damaged.
Last week I noticed the car was overboosting. It was set for 11psi, and running clearly uncontrolled somewhere over 15psi. I had recently tweaked with my boost controller settings, so I assumed that was the problem. There are only so many pieces that control boost, so I determined the issue was with the ball+spring in the boost controller Tee.
The ball had rusted badly enough that it was stuck in place. Since the ball+spring isn't even necessary I removed it to fix the problem.

(the lesson)
The cause of this is no doubt due to my running water/meth injection AND providing the boost signal to the boost controller from the intake manifold. Dumb. I was essentially blowing some water/meth into the boost controller every time it went into boost.
I'm using a TurboSmart dual-stage boost controller, which is a bleeder style. This means that excessive boost will be bled off at the boost controller, effectively causing a small boost leak before the wastegate.

(the fix)
Option 1: Don't use that spring+ball, or at least replace the ball with one that won't rust
Option 2: Use boost signal from before WMI is sprayed, if possible, so WMI is not forced through the boost controller
Option 3: Use different style boost controller
Option 4: (For Tom) don't run WMI

I'll be changing my boost controller signal from the manifold to the intercooler piping, and leaving out the spring+ball. For now I just removed the spring+ball.

I hope this saves someone a motor. In hindsight I can't believe I didn't see this coming.

'04 Mach 1. Built. Turbo. 667whp/631wtq
'06 Focus. Built. Turbo. WMI. (sold)
'03 Mach 1 : 12.61 @ 106.59 (sold)
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Old 10-27-2014, 04:45 PM   #2
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Glad you caught it in time and thx for sharing. Only people that don't make mistakes are the ones that don't do anything.
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Old 10-27-2014, 05:41 PM   #3
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