surge
My experience indicates it can in some conditions. I have an upgraded turbo that I just put on a while ago, and it is on the ragged edge of surge except in hot weather. I noticed the symptoms of surge were less when I shut off the pre-compressor injection.
I believe if your right on the ragged edge like me it may be an issue. I am considering some solutions to it.
One would be to put an rpm switch in line with the pre-comressor solenoid so that it can't spray until the engine reaches a certain rpm ( ie air flow).
I am first going to work with other things to slow the turbos spool a bit, as I did too good of a job with my porting and extrude hone work to maximize its effeciency. I am also looking around to see whats available in boost controllers that allow you to map boost limits to rpm.
Here at high altitude turbo's run at substantially higher pressure ratios than the do at sea level and that effect moves the entire pressure flow plot up on the compressor map from where it would normally be. In my case that pushes the knee portion of the plot when the turbo first reaches max boost around 3000 rpm up far enough that it bumps the surge line.
In hot weather its a non-issue as the lower air density, slows boost increase enough to avoid the problem.
Larry
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