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Old 11-06-2012, 02:39 PM   #11
simon021
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Member#: 157532
Join Date: Aug 2007
Chapter/Region: MWSOC
Location: Iowa
Vehicle:
2002 MY03 EJ207 E85
Dom 1.5XTR Twinscroll!

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Quote:
Originally Posted by Mr Wrex

So pretty much you're letting the spring control boost levels with minimal assistance from the EBCS? Or did I interpret that wrong like a newb
No. I'm saying normally your stock turbo dynamics table increments the wgdc in much too large of steps. For example my wgdc was low 20s holding 19 psi to red line. So adding 1% has a much larger impact than on your stock solenoid that needs 80% to run that much boost.

The stock turbo dynamics is way too aggressive for an ewg. It's something like
-7 - 5 - 3 - 1 0 +1 +3 +5 +7

It should be something like

-1 - 0.78 - 0.56 - 0.32 0 +0.32 +0.56 +0.78 +1

That way the ecu is using smaller percentage increments to control the boost. This is how you get rid of that flutter.

I'm posting from my phone so I hope that shows up properly and makes sense
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