2fast4u_rx7

I replaced my factory airbox with the Apexi dual filter. My engineis completely stock. After the install I noticed a few things. 1. I can hear the factory bov "pshhh" sound which is really cool. 2. when reving or driving the car, it starts off by making a "mooo" sound like a cow. it does it usually when I accelerate up to 2000rpm and once I get pass it then its normal. Any ideas? My filters are the same as the ones on the link below except I am still running the stock plastic pipes.

http://www.cardomain.com/ride/753974

Mahjik

iTrader: (1)

https://www.rx7club.com/3rd-generation-specific-1993-2002-16/eliminate-air-pump-moo-%241-1-minute-486061/

7_rocket

iTrader: (6)

I have the same intake and it is loud as hell (well to me) the moo sound you hear is normal

2fast4u_rx7

Hmm so you would just eliminate the compressor hose and let it shoot int the atmosphere? What is the point of the Compressor?

Mahjik

iTrader: (1)

Check my picture in that thread. That is the airpump relief hose. It works like the BOV does for the turbos, but for the airpump.

Hollywood_FD

I bought the same intake Apexi Intake system as well and I am getting that really annoying mooing sounds. I searched the forum and to my understanding is that removal of the airpump will eliminate the noise. I did eliminte the pre cat with a down pipe. Is there any other route a guy can take? I was told that there might some type a silencer that can be purchased?

staticguitar313

iTrader: (2)

Go non-sequential and replace your air pump with the dummy pulley. NO more problems, no more moos either, ever again, kill the cow . . .