MAF placement?

[jlwdvm]

I currently have my MAF placed between my throttle body and a 90 degree bend in my intake tube that I fabbed up out of 4" tubing. The 90 is needed to make the transition from a long straight piece that runs between the rad and the motor. The air cleaner is behind the drivers headlight....if all this makes sense. I have heard that the MAF needs to have a certain length of straight tubing before and after it to function properly. Texas Speed built my LS3 and supplied the MAF. The tech I talked to their made it sound like it didn't matter. Thoughts? I am thinking I may need to move the MAF into the straight section.

[glassman]

yes and no. GM requires 6-7 inches for the air to "straighten out", but there are solutions for that acording to Spectre/K&N, they make an air straightener or scrambler, i cant remember which. I have an LS and am redoing the air intake system on it and putting it near/behind the left headlight (2nd gen cam). Pics will be in my build thread soon (dis-traction).

[jlwdvm]

http://www.pro-touring.com/threads/102040-1969-Firebird-TA-clone-track-car-build/page7
#121 and 132 give you an idea of what I fabbed up so far.

[Z06vette]

From what I have read & seen on other builds, most are located in the middle of the long pipe running along the rad. Right in the area of the alternator, give or take. Thats where I positioned mine. The blade style MAF is sensitive. If you don't have a screen or "honeycomb" before the MAF, I would add one. You might be ok leaving it there, but if you have any tuning issues it might need to be relocated. Looks like you have a nice build going there.

[jlwdvm]

Thanks. I have the honeycomb style MAF...maybe that is why Texas Speed didn't sound concerned about my placement.

[Musclerodz]

Put it right before the elbow going into the tb. The straighter the airflow is the more stable the a/f wil be.

[Ron in SoCal]

Put it right before the elbow going into the tb. The straighter the airflow is the more stable the a/f wil be.

I agree with you Mike. IIRC, GM harness swap instructions say about 6 - 8" downstream of the TB.