Vtec not audible with oem intake?

[RHelton10]

Hey this is a "just curious" thread, but has anyone else noticed how quiet the crossover into vtec is on the latest gen SI's? I had a 98 sohc vetc civic and an '01 integra gsr (damn I miss that car) and both of them were a lot more obvious with power-felt and the audible change in motor when switching over to vtec; what gives?

For those of you with SI's that have swapped the air intakes, does it become more noticeable after the swap?

 

[webby]

look at the torque line on the 8th gen - on the left...

compare that to the torque line on the 9th below left

There isn't a big kick in vtec sound, because there isn't a major change in power (like the 8th). Plus, there isn't vtec on the exhaust cam.... just the intake cam on the 9th gen. There is a lot more useable torque down low on the 9th.

 

[RHelton10]

That makes sense; I didn't realize they took the exhaust cams out of play. So does the switch-over become more noticeable with a cold air intake?

 

[JiL.]

and what IF we were to swap out the exhaust cam for an 8th gen exhaust cam? Are the heads the same?

 

[squiggy]

Are the heads the same?

Nope.

 

[webby]

^ that, but @axion_industries is working on cams for the 9th gen currently.

 

[squiggy]

^ that, but @axion_industries is working on cams for the 9th gen currently.

http://9thcivic.com/forum/threads/k24z7-cams-and-headwork.9525/