pressure flexing is when you rev a turbo and close the throttle and blow-off if you have one. how come some cars do it and some don't? i have a blow-off and i am boosting 8-10 psi and it works when i am only in gear, moving under load, and then close the throttle. if i just rev it high and close it, sounds like it's not even turbo??? i see that when i do that, the boost gauge will not go above 0. i know gst's can do this pressure flex and some other cars...i am just curious what makes this possible?

 

GSTs have such miniature turbos that they spool even when the motor is not under load. Our hondas use large T3/T4 hybrid turbos that do not spool unless the motor is under load.

Dustin