What's special about i-Vtec ? what's "VTEC" ?

[xheartcore_boyx]

Hey,

so i got my civic couple months ago...and i feel like a noob now x]

whats special about the i-Vtec engines -details- ?! just economic ? or does it have anything to do with the speedy/sporty drive ect, ??

what does VTEC mean ?! most Si owners keep talking about it , and i got no damn idea ... is it just in the Si ?!

[Dar-Dar]

VTEC - Wikipedia, the free encyclopedia

[jdmEGO]

Drive pass 6000 rpm and u feel that kick, that vtec


Edit: do you drive a si?

[Aldaris]

most likely not

[gathermewool]

google is a wonderful thing...VTEC is Valve TEChnology, and is Hondas version of variable valve timing. To keep it simple, a cam shaft will rotate, and the lobes on the cam shaft will lift the intake and/or exhaust valve as needed.

With most cars, you'll only have one cam to operate both intake and exhaust valves or possibly two (ie. DOHC) i-vtec simply uses a second set of cam lobes for high speed operation. This allows for smooth, efficient operation at low load/rpm while engaging, when necessary, the second set for higher load/rpm operation

[Excalibur]

Honda's K20A Engine

[gathermewool]

just to clarify, vtec is a physical set of components in your car's engine, not just some cool sound your car makes when you get to a certain rpm. And no, not only the SI has it. The R18, or Civic EX, fit, etc do not have i-vtec. This only means that they have variable valve timing for the intake, only.

[xheartcore_boyx]

Thanks for the useful answers !!!

and No,i dont have an Si...a JDM civic actually (same engines as the non-si US civics .. ) .

is that "kick" in the non Si civics as well ?!

[habitat]

^^^ sorry but nope.

Visual representation of VTEC
As you can see when vtec engages the larger cam lobe allows opens the valves wider allowing more intake/exhaust gases to get in/out

[gathermewool]

you guys and your super nifty links...much better than trying to explain it!

[nycclaye]

rep to all for answering a noob questions w/o the smart a$$ remarks I've seen of late.

To the OP: Where do you live? Are there Type-R's or Si's in your area for you to experience it?

[gathermewool]

I started getting into cars around three years ago, and I ran into four types of people: 1. tool bags who didn't know what they were talking about who treated me like an idiot for asking questions;
2. tool bags who DID know what they were talking about who treated me like an idiot for asking questions;
3. super intelligent guys who would give me the answers; and
4. super intelligent guys who would explain to me the basics, and then tell me to go off and figure out the rest on my own.

It's a pain in the ass figuring things out, and it takes more balls to show some humility and ask a "dumb" question than to settle on an assumption or listen to idiots who don't know what they're talking about...

[Vtec_Yo]

When you see a car with "VTEC" on the side of it. That means the car has at least 500hp. So you better be careful.

[1.8L FG KiDd]

^ troll?

Originally Posted by gathermewool

google is a wonderful thing...VTEC is Valve TEChnology, and is Hondas version of variable valve timing. To keep it simple, a cam shaft will rotate, and the lobes on the cam shaft will lift the intake and/or exhaust valve as needed.

With most cars, you'll only have one cam to operate both intake and exhaust valves or possibly two (ie. DOHC) i-vtec simply uses a second set of cam lobes for high speed operation. This allows for smooth, efficient operation at low load/rpm while engaging, when necessary, the second set for higher load/rpm operation

[Tredd]

lol, i think all honda's have vtec, am i not wrong?

[K20Redline]

Originally Posted by Tredd

lol, i think all honda's have vtec, am i not wrong?

No the B20 did not have one thats one engine but preety much!

[Stein]

VTEC = Variable Valve Timing and Lift Electronic Control.
i-VTEC = Intelligent Variable Valve Timing and Lift Electronic Control.

VTEC works on the basis where a camshaft has two cam lobes, with it switching over to the high lift and duration lobe at a certain point in the rev range.

i-VTEC is the same as VTEC except the intake cam's timing can be adjusted.

All current Honda production motors have VTEC, although not all as pronounced as the DOHC motors.

[Ct_Sidan07]

vtec is like a bad case of crabs

[27IVTEC]

Originally Posted by gathermewool

just to clarify, vtec is a physical set of components in your car's engine, not just some cool sound your car makes when you get to a certain rpm. And no, not only the SI has it. The R18, or Civic EX, fit, etc do not have i-vtec. This only means that they have variable valve timing for the intake, only.

You dont know what your talking about. All new Hondas have i-VTEC. The "i" in i-VTEC stands for intelligent.

[27IVTEC]

Oh, the B18a1 doesnt have VTEC either.