How does VTEC work.

It just kicks in.yo

VTECS r 4 pussc'z G! geta turb'd owt cef wid da Uras drop kit boned on 18 deep dish rimz, camber'd as wid da mirror tintz awwww datz gangz bro!

or 4 da old fullahz aye geta 8banga coz datz how dae roll aye

any old "8 banga" over your "turb'd owt cef". id rather an engine that has balls, not one you have to add them to. just think of your RB engines as transvestites. they needs balls surgically grafted on to get anywhere

I can't wait for the school holidays to be over!

varrrr tats extremely cwik. y0

Oh dear, you're going to struggle to understand VTEC if you don't know what a cam is.

In the top of any engine, each cylinder has valve(s) that let fresh air and petrol into the cylinder. After the fuel & air has burned, other valve(s) open to let the exhaust gases out of the cylinder into the exhaust pipe.

The camshaft is a rotating shaft with lumps and bumps called Cams on it, as the shaft rotates these lumps and bumps push against actuating rods and/or levers that make the valves open. The valves are on springs so they are normally closed unless a cam is pressing on the valve's actuating mechanism.

Now that you know what a cam is.

The precise shape of these lumps and bumps (cams) controls at what time during the engine's repetitive cycle the valve opens, how wide it opens, and how long it remains open for.

The difference between a mild little low-powered fuel-efficient engine like your grandma's wee hatchback, and a fire-breathing rally car engine that makes 3 or 4 times that amount of power, is hugely influenced by tiny subtle variences in the shape of the cams.

In the old days, car engines could only have one camshaft, so the designers had to choose to use either a "mild" cam shape that would provide a smooth, quiet, fuel-efficient engine that your grandma could drive to the shops with. OR they could chose a hot cam shape that would allow the engine to produce real power.

(Or some sort of compromise in between. look at any "go-faster" car of the 1960s and 70s like a Lotus Cortina or a Triumph TR6. These sorts of things sound like really angry, hardcore little racing cars, but are only making about 150 horsepower - not a lot by today's standards.)

Unfortunately, engines with "power" cams usually don't want to idle smoothly, they often require a VERY skilled toe on the throttle to get a smooth response at low or mid-rpm to avoid stalling or bunny-hopping, and they drink a lot of fuel. They are only happy when they are running at higher RPMs and making power. As a result, engines with such cams in them are not really suitable for normal cars for consumers with average skills like your grandma who just want to drive to the shops without stalling it all the time, and spending a fortune on petrol.

In the Honda VTEC system the engine has a camshaft with a set of mild "nana" cams that controls the engine's valves at idle and at lower RPMs, to give a smooth and easily-controllable engine with a moderate amount of power at low to medium rpms. The tricky part is that a VTEC engine's camshaft also has a second set of "power" cams on it, which do nothing under normal driving. But at high RPMs a switch is effectively thrown and the engine's valves start to be controlled by the power cams, once this happens the engine is effectively transformed into a completely different one and much more power is available if you want to use it.

This ability for the engine to behave like a sensible engine under normal driving, but to change into something more like a race car engine above a certain RPM, is the reason a 1.6 litre Honda Civic engine from the 1990s can make 160 horsepower at full noise, but without suffering any of the harsh throttle response, rough running or excessive fuel consumption that previously made it impossible to supply such a highly-tuned little engine in a normal car for the consumer market.

(Most makers now have either an equivalent of VTEC, or something like it. This is the reason why a 3 litre Toyota Aurion makes more power than a V8 Holden did in the 1990s. and without using turbos or superchargers or anything like that. )

I hope this is of some help.

And just to think I thought people knew when someone was taking the piss.sighs

i was waiting for someone to bite lol

But then again with a meat head like you I shouldn't expect much. LOL

Bite! you obviously took me too serious, bite haha you got trolled and now your making excuses

as you said

Vtec kicked in YO! hahaaaaaaaaa

http://www.youtube.com/watch!v=288Jl1bu_sk

can you please tell me why the f#@$ you would be up at 4.00 am on a sunday and not drunk but answering Qs on t/me