Turbo not supposed to spool in neutral or park??

[FTC]

i was just wondering if the turbo is not supposed to spool in neutral when u rev the car?? its not really a big deal, just as long as it does in drive . but if it is indeed supposed to spool in neutral while reving, how woudl i get it to do this, as mine does not.

 

[TRDirks]

The short answer is that the engine must be under load for the turbo to spool/build boost. It will not build much if any boost in neutral or park.

HTH

 

[UNGN]

Airflow spins the turbo. It takes very little airflow to make an unloaded engine to spin to redline. Think of throttle opening as airflow. An unlaiden motor will smack off the revlimiter at 1/2 throttle and you need full throttle to spool a turbo.

A stepped rev limiter at a lower RPM than redline can be used to spool the turbo on an unlaiden engine. It will artificially allow the throttle opening to go to wide open without having the motor go to redline, possibly allowing enough airflow for an unlaiden motor to spool the turbo.