Playing with restrictors ...
20 May 2002, 11:58 AM
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As search is down, what are the pros / cons of playing with restrictor sizes on my MY99, unmodified?
Is it too fiddly, and will I get similar gains by doing other stuff, e.g. tightening the w/g actuator arm, etc?
Thanks, Craig / brickboy
Is it too fiddly, and will I get similar gains by doing other stuff, e.g. tightening the w/g actuator arm, etc?
Thanks, Craig / brickboy
20 May 2002, 12:16 PM
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In short,
larger hole will give lower boost spikes initially, when going with to large hole you'll end up with less and less boost, eventually factory default around 0.5 -0.6bar if removed completely.
larger hole will give lower boost spikes initially, when going with to large hole you'll end up with less and less boost, eventually factory default around 0.5 -0.6bar if removed completely.
20 May 2002, 01:22 PM
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If you are making target boost all it will do is give you a peak, and it will probably be very variable depending on gear and conditions, and could easily oscillate. This is not a good way alone to increase boost unless it is too low and not meeting spec - ie 13.7 PSI on MY99/00, 15.7 PSI on MY99/00 PPP.
The ECU uses closed loop boost control to get it to target, and it will just drive really badly if spiking.
[Edited by john banks - 5/20/2002 1:24:15 PM]
The ECU uses closed loop boost control to get it to target, and it will just drive really badly if spiking.
[Edited by john banks - 5/20/2002 1:24:15 PM]
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