Compressor surge related: Does anyone back off the throttle partially on boost? eg. city driving
07-31-2004, 09:33 AM
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Compressor surge related: Does anyone back off the throttle partially on boost? eg. city driving
Whenever I do this, i hear compressor surge or the fluttering sound. Secondly, I have an TIP so i'm wondering if thats why i hear compressor surge more because of a TCU?
08-01-2004, 08:20 PM
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Somethings to add:
The fluttering seems to happen if i back off partially at boost levels beyond 0.5bar, plus i'm running mbc only/N75 removed. But I do notice that the N75 does a good job of backing off boost 
. My BPV holds boost and based on the thumb test it doesnt leak. Also, would this boost reservior have anything related to this problem. My Forge 006 is running a blue spring also.
<img src="http://members.shaw.ca/vkfso/reservoir.GIF">
. My BPV holds boost and based on the thumb test it doesnt leak. Also, would this boost reservior have anything related to this problem. My Forge 006 is running a blue spring also.<img src="http://members.shaw.ca/vkfso/reservoir.GIF">
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08-02-2004, 05:23 AM
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Your boost gage
reads after the throttle body? is that correct?
So you don't see any type of pressure spike, you should see vacuum pressure if you lift.
Your drawing:
It says "To Intake". where are you dumping your DV? To a point between the turbo and the MAF?
Why do you have a boost reservior? If you have a working BPV system, a reservior will only create lag. It could be used as a buffer or chamber to prevent surge during shifts, but I'd go with a larger intercooler if you needed that.
So you don't see any type of pressure spike, you should see vacuum pressure if you lift.
Your drawing:
It says "To Intake". where are you dumping your DV? To a point between the turbo and the MAF?
Why do you have a boost reservior? If you have a working BPV system, a reservior will only create lag. It could be used as a buffer or chamber to prevent surge during shifts, but I'd go with a larger intercooler if you needed that.
08-02-2004, 08:41 AM
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I dont see any pressure spikes, just that when it flutters the gauge doesnt drop smoothly into vacuu
m. To intake, is yes to a point between the MAF and turbo. The boost reservoir was oem