Custom Intake

[07typeS]

Its a little off center, can you explain why it needs to be mounted dead center of the pipe? What about CAI's where the piping is longer and you cant get the sensor more centrally located? Do you mean it should be located a little closer to to the throttle body?

Like I said I am not 100% done with it, I wont say I am until I am completely happy with it.

the maf adapter plate lines up perfectly and fits great.

I want to try some more trial and error on the silicone hose, im thinkin a 45 degree angled piece would work better...

when im done I will get pictures together and probably write up a how to piece it together yourself and also offer others who dont have the skills/tools/time to pull it off themselves...

feel free to ask questions guys

[fu_im_from_texas]

Originally Posted by 07typeS

Its a little off center, can you explain why it needs to be mounted dead center of the pipe? ...

The velocity of air passing through the intake does not flow at a uniform speed. At the edges of the pipe the velocity of the air is 0 (theoretically), as shown in the figure below. For more info, do a google search on "no slip boundry condition" or "velocity profile."

The MAFsenser is calibrated for the velocity of the air at the center of the pipe...

pm me if your interested in suggestions to maximize air flow...i have studied the topic extensively...

[Vanderkitten]

Originally Posted by fu_im_from_texas

The velocity of air passing through the intake does not flow at a uniform speed. At the edges of the pipe the velocity of the air is 0 (theoretically), as shown in the figure below. For more info, do a google search on "no slip boundry condition" or "velocity profile."

The MAFsenser is calibrated for the velicity of the air at the center of the pipe...

pm me if your interested in suggestions to maximize air flow...i have studied the topic extensively...

Playin' with the big brains now... time for bed!!

[churp]

Originally Posted by fu_im_from_texas

....
The MAFsenser is calibrated for the velicity of the air at the center of the pipe...

Soooo....you're saying if off center the maf doesn't sense as much velocity and would send less fuel, causing a lean condition?

[fu_im_from_texas]

Originally Posted by churp

Soooo....you're saying if off center the maf doesn't sense as much velocity and would send less fuel, causing a lean condition?

i think the maf wont see as much air, the computer will see that the airflow falls outside the acceptable tollerence, and a code will be thrown...

just a guess though...depends on too many conditions to make a blanket statement...i think a lean condition would be worst case...

[fu_im_from_texas]

Originally Posted by fu_im_from_texas

i think the maf wont see as much air, the computer will see that the airflow falls outside the acceptable tollerence, and a code will be thrown...

Originally Posted by 07typeS

...it threw a code on my first decent trip this morning which was less than 30 miles....

if i get any better at predicting the future, im going to have to apply for a crystal ball permit...

[fu_im_from_texas]

Originally Posted by fu_im_from_texas

The MAFsenser is calibrated for the velocity of the air at the center of the pipe...

Clarification: Center measured along the diameter, not the length ... clear as mud, right?

[PetersRedYaris]

Originally Posted by fu_im_from_texas

Clarification: Center measured along the diameter, not the length...

This is more clear than my statement, but is exactly what I meant.

[YarisGuy]

Originally Posted by fu_im_from_texas

The velocity of air passing through the intake does not flow at a uniform speed. At the edges of the pipe the velocity of the air is 0 (theoretically), as shown in the figure below. For more info, do a google search on "no slip boundry condition" or "velocity profile."

The MAFsenser is calibrated for the velocity of the air at the center of the pipe...

pm me if your interested in suggestions to maximize air flow...i have studied the topic extensively...

Excellent post. Thank you for the pics!