Perrin intake queston

[adidamtb]

Installed perrin intake a few months ago on 05LGT and have a question...

 

during medium to heavy load I can hear the air flow is smooth until about 4k rpm when the air flow sounds like it's sputtering until 5 1/2k rpm where it goes back to being smooth.

 

Is this a problem/normal or just need a tune?

 

 

I'm a noob subie/turbo owner but glad to be finally part of the pack!

[bnguyenbb6]

You need to rescale the intake to work properly. Your Mass AirFlow sensor reads the amount of air based off of the diameter that it thinks. Throwing a new intake on changes the diameter so the car thinks its flowing less air than its actually taking in.

[blongo804]

That's probably the wastegate flutter you're referring to. I can't help much further but i'm pretty sure that's it. I used to have the intake myself.

 

If I remember correctly, you'd hear it sucking air, flutter, then i'd shift and it'd go back to sucking sound? Pretty sweet sounding intake but it's tough to tune via e-tune.

[adidamtb]

You need to rescale the intake to work properly. Your Mass AirFlow sensor reads the amount of air based off of the diameter that it thinks. Throwing a new intake on changes the diameter so the car thinks its flowing less air than its actually taking in.

 

How would I go about rescaling intake? I sense I need a tune and feel I'm in over my head... Good thing I still have stock stuff.

[bmx045]

I strongly recommend getting tuned if you're using anything but a stock intake.