CVVT question

[scampbell1324]

The CVVT..... What does it do? Is it on my 2003 Elantra GT? What good about it?

[soullesselantra]

its basically like a constant VTEC, what it does is constantly changes the valve timing depending on how the engine is running, to A)give better fuel economy, and B)better performance throughout the power curve...as far as it being on the 03's...im not too sure

[blupupher]

Later '03's have it. It only changes the exhaust valve timing and is mainly a emissions thing on the Beta II.

[pjc6281]

Soulless your right in ur explanation but i wouldnt say its like vtec. Just variable valve timming to get good emissions, torque curve. It was first introduced in the later year 03s, not sure how u check

[soullesselantra]

well...owning a del sol and an elantra...i would...lol

[evan938]

VTEC = valve timing electronic controlled
CVVT = continuous variable valve timing

that tells me VTEC = CVVT

[mtlelantra]

VTEC = valve timing electronic controlled
CVVT = continuous variable valve timing

that tells me VTEC = CVVT

VTEC actually stands for Variable valve Timing and lift Electronically Controlled. CVVT doesn't have the variable lift.
They're similar but not the same.

[FinalBreath]

I have an 03, how can I figure if i have a CVVT engine?

[pjc6281]

VTEC actually stands for Variable valve Timing and lift Electronically Controlled. CVVT doesn't have the variable lift.
They're similar but not the same.

Thank You!!! :halm:



And Cvvt is always on , vtec turns on at a certain point, or the lift does at least

[soullesselantra]

Thank You!!! :halm:



And Cvvt is always on , vtec turns on at a certain point, or the lift does at least


nowhere did i say they were exactly the same, i said it was like a constant vtec, not that it was...and depending on the engine, i know my D16Z6 kicks in between 4800 and 5200 with a 7200 RPM redline...its not too much of a kick, but its nice for a little extra top end on the highway

[BobMs_wht2k2]

I have an 03, how can I figure if i have a CVVT engine?

Do you have a California car? Do you have a MAF sensor? Looking at the drivers front of the head is there a small bump with wires running to it? If you answer no to all of these, than you DO NOT have a CVVT car.

[importspeed]

Later '03's have it. It only changes the exhaust valve timing and is mainly a emissions thing on the Beta II.
sorry but you are half wrong, the exhaust camshaft is not controlled by the CVVT assembly, the changes are only done to the Intake camshaft, valve lift and duration are unchanged, the variable part is up to 45 degrees of rotation.
True, Cvvt is done as an emissions item because it can provide an EGR effect without using an actual EGR valve.

[cbrmale]

The only reason for CVVT is to make the engine run cleaner at 'off-cam' revs. Apparently, the engine does run a little smoother than non-CVVT Beta engines, probably because it doesn't have the same degree of mid-range valve overlap as non-CVVT engines.

While we may not be aware of it, engine emission standards get tougher over time. The toughest yet is the EuroIV, which the 2003 Beta now passes and which enabled Hyundai to offer a 2.0 version of the Elantra in Europe.

I am not aware of any 2.0 Elantra having a EGR valve, although US-spec engines may be different to the rest of the world. Can anyone confirm if this is the case?

Thanks.

[BColeman]

It's my understanding that we do not have an EGR valve.

The CVVT behaves similar to one, leaving the intake side open a little longer (or the exhaust side), leaving behind exhaust gas to help with combustion, making better fuel economy and lower emissions.

If you don't care about emissions, unplug the CVVT solenoid on the front of the motor, then remove the cats, and you'll be making power.

http://i26.photobucket.com/albums/c111/bpc217/My%20Car/IMG_0870.jpg

Look at the head, to the right of the headers, just under the black valve cover. There's solenoid sticking out with wires covered by wire loom. That's the CVVT controller. Next, look at the intake and notice the MAF sensor. If you've got both of these, you have a CVVT motor, if you don't have them, you are a non-CVVT motor.

[FordFasteRR]

i'm not sure if disconnecting the cvvt solenoid will yield more power.

has anyone done an on-dyno test of this before and after ???????

I heard the cvvt only changed up to 20 degrees. but my memory is failing me these days !

=)

Also true about the cvvt controlling only the intake... it seems strange since the actuator is mounted on the exhaust cam itself, the oil pressure controlled mechanism actually moves the intake cam via a chain ..

You can tell that the exhaust cam is not handled by the cvvt system because it is directly coupled to the timing belt which is fixed gear- non-variable...

!

[Keyan]

CVVT is more like the VVT available on the new EVO 9s. Adjusts only the intake, gives a smoother torque curve and is for emissions.

VTEC actually has another set of cam lobes on the camshafts that the lifters shift to when vtec enables, giving more DURATION and LIFT.

CVVT just alters intake TIMING.

Altho I am on a continuing quest to see if the CVVT is able to be adapted for high-performance. Gotta see what those EVO-9 owners end up doing. :)

[CTele02]

I guess Hyundai like alot of auto companies are late on the "Vtec" game and have to focus on higher emission standards than power. Especially if they want to sell to the whole world. 2003-2006 Elantras came with either SULEV (132hp/133tq) or ULEV (138hp/136tq). How do you tell the difference whether you have SULEV or ULEV?

[Keyan]

I guess Hyundai like alot of auto companies are late on the "Vtec" game and have to focus on higher emission standards than power. Especially if they want to sell to the whole world. 2003-2006 Elantras came with either SULEV (132hp/133tq) or ULEV (138hp/136tq). How do you tell the difference whether you have SULEV or ULEV?


SULEV Is stamped on the top of the intake manifold in black.

[scampbell1324]

.....alright then thanks :p