21-12-2013, 10:29 AM
As said, compressor spinning too slow for the amount of pressure produced and air demanded. This is the problem with turbos that are very efficient, they move so much air at low engine speeds and spin up so fast, that as soon as the exhaust gas flow slows, it instantly causes it to begin to surge..
The biggest problem lies when those noises happen on the throttle, that's because it's making so much air, even with the exhaust flow, there's no way it'll stay stable, so then starts making horrible noises... A lot of pressure is placed on the compressor shaft when it happens, combined with the exhaust gas spinning the turbine, it's a situation for snapping turbine shafts... It's like the compressor trying to do one thing, and the turbine doing another...
The biggest problem lies when those noises happen on the throttle, that's because it's making so much air, even with the exhaust flow, there's no way it'll stay stable, so then starts making horrible noises... A lot of pressure is placed on the compressor shaft when it happens, combined with the exhaust gas spinning the turbine, it's a situation for snapping turbine shafts... It's like the compressor trying to do one thing, and the turbine doing another...
