# MAF and Exhaust Gas Questions

**URL:** <https://forums.speedlife.net/t/maf-and-exhaust-gas-questions/92285>\
**Category:** SON240sx Automotive\
**Created:** [January 26, 2006, 12:28pm UTC](https://forums.speedlife.net/t/maf-and-exhaust-gas-questions/92285 "2006-01-26T12:28:53Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![lil\_devil](https://avatars.discourse-cdn.com/v4/letter/l/34f0e0/32.png) [@lil\_devil](https://forums.speedlife.net/u/lil_devil)\
**Post date:** [January 26, 2006, 12:28pm UTC](https://forums.speedlife.net/t/maf-and-exhaust-gas-questions/92285/1 "2006-01-26T12:28:53Z")

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\<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.

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**Author:** ![Original\_Nutta](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/original_nutta/32/5474_2.png) [@Original\_Nutta](https://forums.speedlife.net/u/Original_Nutta)\
**Post date:** [January 26, 2006, 1:24pm UTC](https://forums.speedlife.net/t/maf-and-exhaust-gas-questions/92285/2 "2006-01-26T13:24:00Z")

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any chance, you can post in the technical section?

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**Author:** ![spilner](https://avatars.discourse-cdn.com/v4/letter/s/f17d59/32.png) [@spilner](https://forums.speedlife.net/u/spilner)\
**Post date:** [January 26, 2006, 1:45pm UTC](https://forums.speedlife.net/t/maf-and-exhaust-gas-questions/92285/3 "2006-01-26T13:45:51Z")

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what are you trying to find out here?

no. incorrect.