Volant intake loud

[Centex14]

Put a volant on my truck yesterday. This thing is loud under partial or moderate acceleration. It’s weird though because it’ll be real loud accelerating and then suddenly it goes quiet. Is it the vvt causing the sudden change in tone?

 

 

2014 z71 LTZ

Volant Intake

Borla Exhaust

[pewterliftedz]

No it's the intake, it's a drastic change in cabin volume.  I have that same intake on my 17' 6.2, I love it so much that I bought the same 1 for my dad's 16' 6.2.

[Centex14]

I get that. But this is different. It goes from incredibly loud to whisper quiet while accelerating. I would expect it to stay loud the entire time, not just suddenly go quiet.


2014 z71 LTZ
Volant Intake
Borla Exhaust

[Jacoby]

They all do that.  I had a K&N on my Ecoboost Expedition and now an S&B on my 17 Silverado and moderate to heavy throttle it was like the engine and exhaust note would get louder for a few seconds then it would quiet down.

 

Not sure why they do that but its normal.  Light throttle mine wont do it.  I have to get into the gas to really hear mine

[Centex14]

I don’t remember the k&n on my eco boost being loud but that was 6 years ago.

It’s gotta be vvt and the throttle body being manipulated despite the throttle position. Only explanation I can come up with.


2014 z71 LTZ
Volant Intake
Borla Exhaust

[2017_whitez71]

My GM performance intake is the same way.  Love that sound!

[HondaHawkGT]

49 minutes ago, Centex14 said:

I don’t remember the k&n on my eco boost being loud but that was 6 years ago.

It’s gotta be vvt and the throttle body being manipulated despite the throttle position. Only explanation I can come up with.


2014 z71 LTZ
Volant Intake
Borla Exhaust

 

Yes I believe it's a combination of VVT, spark timing, and the throttle body position. Even with the stock intake I can hear the engine note change.

[Centex14]

Wonder if tuning can help eliminate that.


2014 z71 LTZ
Volant Intake
Borla Exhaust

[Sikk50]

I have the same intake, and it does the same thing.  Will be nice and loud, then dead silent. 

[davevinc1080]

I think it is the stock flapper valve (thats what mine was at least)

 

If you have the stock exhaust and the volant intake which i do.......it was kind of annoyingly loud when it shifted into 3rd then it got quiet.

 

I ended up opening the exhaust flapper with a hose clamp and the low end resonance is gone. It works better and s quieter down low.

[2018GMC]

I have 6.2 with afe momentum GT and magnaflow 14909. Deleted stock muffler and flapper. Kept resonator and stock pipe cats etc. 

 

My intake is nearly quiet as stock until you put in heavy throttle, I’d say above 65% throttle you really hear intake sound.