LS7 Card style MAF placement

[BADNBLK]

Is there a rule of thumb for placement of MAF in the air intake tube? I'm using a twin style "y" pipes intake tube and there is really only one spot and its about 3 inches out from the throttle body. I am using an air straightner (honeycomb) before the MAF, just after the merge... Am I gonna run into issues?

[jlcustomz]

3" out from throttle body should be fine. Don't think honeycomb should be an issue there either. You need tuning anyways going with a different MAF type.

Don't know of any over specific rules for MAF placement, just not too close to throttle body, not on 1 side only of twin tube, Air inlets not right behind radiator fans catching bad turbulent air etc.

[BADNBLK]

Well it sounds like cobbled together idea of parts might work then lol! Thanks for the input, I will just keep going after it.

[1989GTA]

Sounds like you do not have a choice unless you want to run speed density only. Your plan might just work fine.

[BADNBLK]

Sounds like you do not have a choice unless you want to run speed density only. Your plan might just work fine.

You're right... unless I wanna re-think the wheel and ditch the twin air intake, but I kinda have my heart set on it.

[WallaceMFG]

My friend built a really nice dual intake for an LS3 he was putting in a Camaro, but it didn't work. Having the MAF that close to the throttle body made it run like crap. Always ran crazy rich at idle, bad throttle response, sometimes stumbled when you rolled into the throttle. The MAF was about 6" from the throttle body, and it was downstream from where the pipes merged. He moved the MAF out into one side of the intake and blocked the other side and it works fine now. He's gonna keep the Y intake so the engine bay looks good, but only half of it is actually functioning. Good luck

[1989GTA]

The honeycomb before the MAF might save the day for him. If not he has two choices that I can think of. Go to a single air inlet or ditch the MAF and tune for speed density.

[jlcustomz]

My stock 99' ls1 maf with honeycombs got moved right near throttle body when I made my custom intake. Electronic part is only about 2" from throttle body opening. No detectable difference from being about 5" away.

Different mafs can behave differently & the honeycombs probably do a lot towards making it behave.

[BADNBLK]

The original plan was for SD tune, but my tuner dislikes the SD tune on N/A vehicles and suggested the LS7 card style. I did researched and found that the air straightener can help some of the turbulence from the merge... I guess I will just have to try, and worst case scenario, Block off one side and mount the MAF before the merge away from the throttle body.

Thanks for the input here guys. It good just to have someone to bounce thoughts off of.

[1989GTA]

What size tubing do you have on your air intakes?

[BADNBLK]

What size tubing do you have on your air intakes?

4" tubing