JettaRedII

I opened up my airbox by essentially cutting out the end away from the engine. Now it gets unrestricted airflow to the stock filter. However, you can hear everything on the intake more clearly. Not as bad as a cone filter, but close.


The problem is now at part throttle, I hear a hum or honk that sounds like diaphram vibration. I swapped in my Forge 007P and the noise goes away. I really liked the R1, but don't like the noise. I opened it up and the diaphram looks intact (the thing is brand new), so is this just the characteristic of a diaphram type DV?
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2004 Audi TT 225Q GIAC, APR R1, Neuspeed 19mm RSB
2001 Audi A4 1.8TQ GIAC K04-15 Hammer, Racetec FMIC, Aquamist WI, TTT Downpipe, 710N, Dieselgeek SS, South Bend Clutch Stage 3
1999.5 Audi A4 1.8TQ Neuspeed 1 Bar, 710N
2000 Audi A4 1.8TQ GIAC, 710N
2003 GTI 1.8T Black SOLD 2000 Supercharged JettaRed DEAD

Qu!cksilva

they put in a stiffer spring..mine honked..they blamed it on pressure drop due to a FMIC that could be too big???

ClarkSJ

and no FMIC

JettaRedII

Well, I did a test with 3 lb weights setting on top of the springs and found the weakest Forge spring (green) is stiffer than the R1 spring. I will start with that one and see if it makes a difference.

ZGTT

yes, I had one and it honked on part throttle. Took it out and went back to the forge dv.

JettaRedII

Well, I replaced the spring with the green spring out of my Forge kit. The green is the weakest Forge spring, but it is still stiffer than the spring that comes with the R1. No more honking and back to smoothness!

Horch it

just stick the 710N back in and all your honks will dissapear

DeadLy

i love my r1 no honking whatsoever...

kodeTT

honks, but not as much.