It would still be impressive without the ITBs.

 

true, but i am willing to bet that i can buy a manifold, get it ported by a professional so that it will flow more than a sufficient amount and buy a new pair of custom grind cams for cheaper and all be tuned for less that 1300 bucks and gain atleast 3 more whp and ftlbs of trq all over the power band over itbs...

 

ITB's are what make it impressive ...

 

You will have a gutless low end motor.

 

Blah blah all these generalizations are false. Many cars come with ITBs from the factory. The key is proper sizing.

 

You make a good point. But it's been my experience that ITB's on anything smaller than a 2.0 liter engine really make for a shitty torque curve. It's a lot more doable on something with decent displacement like the S54 E46 M3 motor.

EDIT: As far as daily driving goes anyway. Track car who gives a fawk h:

 

Then what about all the sport bikes with ITBs?

 

- you don't need a high RPM motor to benefit from ITBs
- Lots of people overlook the tuning required to get ITBs running properly for the street. It's easy to tune it for full throttle, but for partial throttle, it's not easy.
- DIY ITBs are usually done for just show and most of them don't care about the performance aspect of things. They just want ITBs. There are many things to think about when getting ITBs: Size, length, and angle are all equally important to get the most gains. So unless you know exactly what you're doing, then I would stay away from the DIY ITBs. Even some of the aftermarket ITBs out there are "generic"...meaning made to fit many different types of setups.
- And I agree....ITBs should be the last thing to throw on. Once you change the cams, pistons or soemthing else, then you might need different ITBs (different length, diameter, etc.).
- The new Hondata S300 has ITB support (finally), for the fraction of the price of an AEM EMS. From what I understand, It has the ability to switch between TPS and MAP.