Quote:
Originally Posted by Tiny
BOV's were made to stop the intercooler from popping it's welds. Thats the only practical reason for them. It doesn't harm the turbo to have no BOV.
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Please step away from the computer now.
No BOV on a turbo is about the quickest way outside of antilag to make that hair dryer nothing more than a leaky paper weight.
Taken from Garrett:
The Blow-Off valve (BOV) is a pressure relief device on the intake tract to prevent the turbo’s compressor from going into surge. The BOV should be installed between the compressor discharge and the throttle body, preferably downstream of the charge air cooler (if equipped). When the throttle is closed rapidly, the airflow is quickly reduced, causing flow instability and pressure fluctuations. These rapidly cycling pressure fluctuations are the audible evidence of surge. Surge can eventually lead to thrust bearing failure due to the high loads associated with it.