Tunerfreak wrote:You will have probably heard of I-VTEC (Intelligent VTEC, constantly variable cam timing) lets say we take a blacktop H22A1 and leave the cam lobe VTEC method as it is engaging at 5.2k rpm (Or whatever rpm is most efficient)
If it works anything like Toyota's VVTi, then the rpm when the timing kicks in is decided by the ECU after processing multiple inputs, (like rpm, throttle position, air temp, coolant temp, and so on). It won't always kick in at exactly 5200rpm. I don't think you wanted to know that, but anyway . . .
Tunerfreak wrote:Then say we run a second exhaust slightly larger and less restrictive with a constantly adjusting valve also opening with the rpm . . . . . For airflow for it to work efficiently I'm assuming you will most likely need an adjustable head intake also contentiously variable with the rpm
Variable manifolds are old-school. Take my engine for an example. It has TVIS, which means that each cylinder has two intake runners, and one of them is closed off with a butterfly vavle. The idea is that a slightly restrictive intake gives better torque at lower rpm, and when you hit about 4000-and-something-rpm that valve opens, which is supposedly better for top end power. It works, sure, but Toyota soon abandoned TVIS and went with single smaller runners (you might have heard the names bigport and smallport?). A single smallport gives better air velocity, and works well at any engine speed.
If you're going to spend money trying to fab an intake, go for individual throttle bodies with velocity stacks and a nice large airbox. Best solution for any engine.
As for the exhaust, some decent tuned-length extractors with an appropriate diameter is all you need. A variable system would only create turbulence and restriction.
Tunerfreak wrote:Now lets say we want to go Forced Induction, Turbocharging to be specific, the fuel will need remapped I assume
Ya, fuel map will always need to be optimized whenever you change the setup.
Tunerfreak wrote:I am guessing none of all this will have any sort of gains worth the trouble and manufacturing required.
Indeed. Don't make things too complicated, and spend the money you saved on petrol
This is just general info, because I don't know much about Honduhs, but I hope it helps a bit.