imported_LiL Devil

<The main reason I am asking this is that i want to futher understand the turbo system>
1.) If i keep the Throttle Plate at the same posistion so i will get X amount of air then it goes in to the chamber mix with gas then it will create exhaust gas in turn spinning up the turbo. My question is if I keep the throttle plate at the same position and i down shift and still holding the same throttle plate position do I get more exhaust gas? The rpm rise but do i get more exhaust gas? The reason I ask is that let say my turbo have max boost at 5k rpm, so if i am in 4th at 3k and if i downshift BUT holding at the same throttle plate posistion do i get max boost cuz the rpm rises if i donwshift. But then i was thining if the throttle plate is at the same throttle position it should takes in same amount of air no matter what gear i m in which mean same exhaust gas so if i downshif i will not get more boost until I step more on the pedal... Please explain to me.

zeeman

iTrader: (1)

theres no need to downshift with a turbo...IMO...just step on the gas more...as soon as the turbo starts to spool you'll be making good power.
In theory what you are saying is correct b/c as RPM increases the exhaust pulses become quicker...thus spooling the turbo faster.

imported_LiL Devil

Also does it use more fuel when I downshift but i m not rev matching the reason i ask is becasue i hear the exhasut chage so it must use more fuel but where do the engine get the air from when the throttle plate is close becasue my foot is on the brake when i donwshift.

zeeman

iTrader: (1)

the idle air control valve allows air past the closed throttle plate