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dann28
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dann28
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tn
Jun 14, 2:23pm - #449403 
Maf Sensor Location

I was wondering why is the Maf Sensor located close to the throttle body on 2003 celicas. Is there a performance gain or what?

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Posts: 464
CaffeineKid
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CaffeineKid

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2008 Scion tC

Joined: May 2002
Posts: 464
California
Jun 14, 4:57pm - #449404 
The throttle body and mass ar flow (MAF) sensor go hand-in-hand:

Quote:
A mass air flow sensor is used to find out the mass flowrate of air entering a fuel-injected internal combustion engine. The air mass information is necessary for the engine control unit (ECU) to balance and deliver the correct fuel mass to the engine. Air changes its density as it expands and contracts with temperature and pressure. In automotive applications, air density varies with the ambient temperature, altitude and the use of forced induction, which means that mass flow sensors are more appropriate than volumetric flow sensors for determining the quantity of intake air in each piston stroke.

SOURCE: http://en.wikipedia.org/wiki/Mass_flow_sensor

This is why they are next to each other.

TLDR / VERY BASICALLY put:
AIR FLOW > Air Filter > Intake PIPE/TUBE (or STOCK AIR BOX) > MAF > THROTTLE BODY > FUEL INJECTORS, SPARK PLUGS and other ENGINE "STUFF"

Linked Image

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dann28
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dann28
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tn
Jun 14, 6:14pm - #449405 
Yes I know that what I was meaning is why is it moved closer to the throttle body on Injen and AEM Intakes.Instead of the original location in front of the air box

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CaffeineKid
CelicaSpecialist
CaffeineKid

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2008 Scion tC

Joined: May 2002
Posts: 464
California
Jun 14, 9:39pm - #449407 
There really are not too many other good mounting locations on an aluminum Intake system.

The same rational could be said about mounting to the stock plastic air-box (which is solid) VS mounting on the flexible rubber fitting:
Linked Image

On the Blitz SUS Short Ram Intake, it's also mounted to a secure location:
Linked Image

AEM CAI MAF sensor mount location is here:
Linked Image

Injen CAI MAF sensor mount location is here:
Linked Image

I see the mount location is more of an attachment-type of detail, than anything else. And obviously, someone specialized in aerodynamics (as related to air flow temperatures) would know more about this smile

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dann28
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dann28
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tn
Jun 15, 4:10am - #449409 
yea your right I just thought there was some performance gains to be had by putting the maf closer to the the throttle body vs at the end of the filter.thanks for the response.

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