Well ever since I had had this car, I've noticed that at about 4000 RPM the tone of the engine changes and there seems to be a little more OOMPH....I knew there was no V-TEC and I knew we had dual runners on the intake, now I know how it all works. (Just in case y'all were wonderin')
VARIABLE INDUCTION SYSTEM
For the 3.2-liter, a boost for both high-end power and low-end torque is provided by a Variable Induction System, similar to that used in the NSX. A unique two-level intake manifold-made of aluminum to save weight-provides three possible paths for air being inducted into the engine. The path is selected by three butterfly valves that are electronically controlled and actuated by intake vacuum. When the engine is running at less than 3300 rpm, air for the two banks of cylinders is strictly separated and is led through the longer of two intake paths for optimum resonance charge effect at low engine speeds. Between 3300 and 3900 rpm, the two larger butterflies open and air flows through the shorter path for best resonance effect in the midrange. Then at 3900 rpm, the third butterfly opens to provide a large plenum serving all cylinders. At this point, the resonance effect is reduced, but an inertia ram tuning effect takes over to boost high-end breathing and power output.

 

4000 rpms is the crossover, its when the engine stops purring and GROWLS.

 

'Specially with the intake...that was when I really started noticing it. I always knwo it was something like that, but now that I have seen the intake and the big-ass butterflies, I understand it a bit better.

 

The stock airbox/resonator is there to prevent the booming noise that occurs past 3000 rpms.

 

Yup. TRUST me I know. When I sold my integra, I put it back to stock. Put the airbox back, but couldn't find the resonator!!! LOL Might as well have still had the intake on, sounded pretty much exactly the same!!!

 

Just got sad....I miss my 'Teg...:'( LOL

 

I could always tell when the extra push came from the engine. I never figured out why it took the engine around 3500 RPM to really get that push... But now I do.

 

wow great piece of info man wtf are those rep points???

 

They're gone, people abused them.

 

it's all good. I just put it up there for you guys, no rep points necessary.

 

Is that only on the 3.2?

 

Yup. 24 valve 3.2 L V6 only. I'm sure there's some fancy stuff in the 2.5 as well....

And after just having come from the auto show yesterday, I can say I still have more faith in Honda than anybody else for making great engines The new VW Jetta also has an inline 2.5L 5 cyl as the base engine now and only 150 hp. NOT exactly the same level of car, but it just goes to show Honda's ability to get more from the same displacement. (esp. since the 2.5 TL is 10 years the Jetta's senior!

 

Yeah, the Honda I5 definately feels like it has more to it then the Volvo I5 did. (2.3 or 2.4L, I can't recall)

 

Don't worry about those Cornflake...I took those out

 

HAHAH....thanks Brown....I didn't think I needed them!!