It's not only a factor of just multiplying the cross section of the throttle. There is a lot more to it than that.

Although crude and simplified this is a good intro to throttle bodies.

[ame]https://www.youtube.com/watch?v=uS3yHPfT9I8[/ame]


A runner/manifold/single throttle application will never be able to match the response of ITB's.


Once you factor in resonance tuning and trumpet/runner length it becomes a wash.

I was calculating cross sectional areas for a rough comparison, as it pertains to what I was talking about a few posts up, which was that a large throttle body has been used in FI applications because the OEM throttle body can be a bottleneck. It was definitely a rough calculation used to illustrate the potential benefit this kit would have with FI, and again, this was brought up to give reasons for why this kit would be beneficial for FI applications (besides throttle response) because some mentioned it wouldn't have much use. An aftermarket TB would be a cheaper alternative to this kit if all someone wanted was to change the bottleneck that is the stock 65mm TB, but I mentioned it nevertheless.

If the stock tb is a bottle neck, why do larger ones make less power? Oops, you mean on f.i. setups.

Exactly! I'm optimistically hoping they make power, but in the end, I just want a positive driving experience. If a unique sound and instantaneous throttle response makes my personal driving experience better for an NA setup, then I'm all in.

I've never driven a vehicle with ITBs, so my curiosity for them is at it highest now that I might have the opportunity to try it.

^^^ Thinking/typing out loud??? Weird.

I'm also an asshole.

How?

Any results from the ITB testing?

This was just asked last week

Any results from the ITB testing?

Any results from the ITB testing?

Maybe if we ask enough we can fully fund the project, and bend the laws of space and time for instant results.

Given its been nearly 2 months , and no results.


The conclusions could be


A they dont work ie minimal power increase or some other major issue

B They work to some extent but have drivability or some other major issue
C they never got arround to testing them for some reason




One would assume if they worked to any usefull extent (at reasonable cost benefit ratio) then their would have been at least preliminary results.


Hopefiully they do work, but given that other intake mods like the velox/versus and full blown manifolds didnt set the world on fire, its possible that the factory engineers did well and theirs little room for improvement. Without say major changes to head/combustion chamber and cams valves etc.

Creative solutions are needed to tune trumpets, when both your MAP and MAF sensor are gone :thumbsup: