Intake help....reading graphs........

[Aaron]

I bought and installed a Fujita intake for my GTI. The intake pipe going into the engine is 2.5". The Fujita uses a 2.75" tube and a 2.5" tube. The 2.5" tube houses the MAF.

http://i146.photobucket.com/albums/r247/A4SHO/Fujitaintake2.jpg

http://i146.photobucket.com/albums/r247/A4SHO/Fujitaintake.jpg

People have complained of a slight hickup only in hot temperatures and only from 1000-2500rpms. A guy did some logs with a VAG-Com(diagnostic tool) and found it pulled some timing. Here is the link comparing it to another intake.

http://www.golfmkv.com/forums/showthread.php?t=67328&highlight=fujita

 

I was wondering if anyone could help me understand the information contained in the graphs. Also, I was wondering why the intake would cause such a problem.

 

I was wondering also if changing the pipe diameter to 2.75" by the Maf and using a 2.75" to 2.5" silicon reduction coupler would solve my problem. All of the other aftermarket intakes that use the 2.75" all the way use the reduction coupler, so is it the fact that the pipe where the air is getting metered is a bit smaller than stock messing with the readings?

 

Sorry for the long post, just trying to understand this. Thanks.

[Aaron]

To add crap to this thread, this intake clearly uses the 2.5" pipe most of the way, including where the MAF is, so why is this intake not getting ripped apart?

http://www.namotorsports.net/detail.cfm/part_cd/AF51-11112

[Guest Removed]

cause it speeding up the air in the reduction. hence throwing the maf readings off.