Question about AEM CAI VTEC sound - Honda Forum / Acura Forum

B16a2 Sleeper · 03-28-2002, 02:15 PM

When you have a Aem Cai intake on ur Si, Where does that rumble and louder sounding vtec coming from?

Supamatt · 03-28-2002, 02:18 PM

It's not as restrictive, it'll be louder

B16a2 Sleeper · 03-28-2002, 02:20 PM

So the louder sound is coming from the intake itself but not the engine itself right?

damslowsi · 03-28-2002, 03:18 PM

if your asking about the sound it comes from the air being pulled into the intake. And the different tone u hear when the vtec kicks in is just that much more air being sucked in like a vaccum. Just like how your exhaust works but in reverse.

Milano97 · 03-28-2002, 04:07 PM

Yeah, I think is just air rushing into the filter, up the pipe, into the throttle body. The sucking sounds gets real loud and there is a pronounced growl, from the air, I don't really think it is the motor.

B16a2 Sleeper · 03-28-2002, 04:12 PM

What about when Vtec hits? Isnt the sound of vtec comin from the engine?Sorry guys, I still dont fully understand vtec

Turosh · 03-28-2002, 06:57 PM

more air flow in the b16 head

Supamatt · 03-28-2002, 06:59 PM

I'm sure the intake is acting like a speaker. It is resonating the sound more than it would if it were a different material.

jdmlude · 03-29-2002, 08:34 AM

Your stock upper intake piping is rubber (sound deadening and also equipped with resonators). AEM mandrel piping resonances more sound.

ebpsi99 · 03-29-2002, 09:46 AM

I love it when i hit 5500 with my cai. It's one of the best sounds in the world. Except for bov's.

CivicDude2000 · 03-30-2002, 02:05 PM

Quote:

Originally posted by B16a2 Sleeper
What about when Vtec hits? Isnt the sound of vtec comin from the engine?Sorry guys, I still dont fully understand vtec

The main sound difference you hear is not the vtec itself, but a byproduct of it kicking in. When it kicks in your engine needs more air so the sound that you hear when it kicks in is actually you intake sucking in even more air than before.

BennySiR · 03-31-2002, 07:24 PM

music to my ears!!!

HEK · 04-01-2002, 07:14 AM

I agree with Benny.......broooommmmm........then sound of music.......

BennySiR · 04-01-2002, 08:02 PM

I think its more like a BHHAAAAAAAA!!! but its cool

HaadkoeVTEC · 04-01-2002, 10:17 PM

The sound you are hearing is because of the valve overlap... for just a fraction of a second, both the intake and exhaust valves are open during the high lift / duration of VTEC. The reason it gets so much louder with the AEM CAI is because the AEM it is just a tube without all of the baffles and other sound deadening bs characteristics of the stock intake system.

I love that sound... (Weeping)