TwinTurbo.NET: Nissan 300ZX forum - you need to learn about boost controllers
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Subject you need to learn about boost controllers
     
Posted by gt300zxtt on September 14, 2008 at 10:01 AM
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In Reply To update on my stock boost problem. posted by ricky6991 on September 14, 2008 at 01:54 AM
     
Message search manual vs electronic

hint: manual will cause a spike, that is the nature of the beast. it all comes down to system dynamics... if you are aiming for x, the controls implemented achieves x in this case by bleeding off pressure at some point. but, due to time lag, pressure will actually exceed x and overshoot the desired value.

for example, in the above graphs (generic graph pulled off internet), you are aiming for 1. you can see the red line shoot over the desired parameter then settles down to 1. in your case, the curve getting to 16 is steeper and/or the time lag is larger, causing an larger spike.

     
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