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MSCB-1 Boost Fluctuation

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Old 06-25-2013, 10:41 AM
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Default MSCB-1 Boost Fluctuation

I finally got my car to the dyno last night and had some trouble with the boost fluctuating from the boost controller.

Information:
355 LT1
GT4788 T6
Tial 60MM Wastegate w/ 5LB Spring

I have it plumbed in waste gate mode, so it looks like the attached picture.

With the controller set to anything from 1-6, it held at 6#'s all the way up to 6500 RPM.

With the controller set to 9, it went to 12#'s, then down to 10. Went to 10#'s and then to 12, then to 10, then to 12 before I backed out.

Any ideas on how to make it work properly?
Attached Thumbnails MSCB-1 Boost Fluctuation-capture.jpg  
Old 06-25-2013, 01:45 PM
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do you have a line to the top of your wastegate? You have to in order to control pressure nicely.
Old 06-25-2013, 01:51 PM
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No, in this mode, it says to vent that to atmosphere.
Old 06-25-2013, 02:20 PM
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Try it in dual port wastegate mode.
Old 06-26-2013, 07:43 AM
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Originally Posted by INTMD8
Try it in dual port wastegate mode.
yip x2



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