Vtech/VVtl-I Vs Nissan Continuously lalala - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Ni240sxt · 03-09-2002, 02:00 PM

When i was looking at the spec of the new Nissan Sentra SE-R, i notice they have something call Continuously Variable Valve Timing COntrol and Variable Intake System, is that like a Nissan Version of a VTech or VVTL-I or something? Also when i was reading Road and Track i read something about Audi and BMW using the same technology. <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/crazy.gif" border="0" valign="absmiddle" alt=':crazy:'>  <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/crazy.gif" border="0" valign="absmiddle" alt=':crazy:'>  <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/notify.gif" border="0" valign="absmiddle" alt=':notify:'>  <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/notify.gif" border="0" valign="absmiddle" alt=':notify:'>

S13Grl · 03-09-2002, 02:12 PM

Every major auto maker uses a Variable Valve Timing technology. It's Toyota and Honda that choose to put a fancy name on it and make it a bigger deal than it actually is.

*DSC* · 03-09-2002, 03:22 PM

I think BMW gave their a fancy name too, vanos? No clue what it stands for. But I agree with s13grl, I think honda is the only one to actually put it on the side of their car <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/dozingoff.gif" border="0" valign="absmiddle" alt='

'> But most everybody has at least one car out with some sort of variable valve timeing.

XylathaneGTR · 03-09-2002, 03:57 PM

Yo, Ni240sxt...yes, i think it is...
every company does have Variable Valve Timing and stuff like that,  BMW came out with a new one called Valvetronic or something...and it's suppsoed to be freaking amazing...

wherezmytofu · 03-09-2002, 04:06 PM

i understand that ur a newbie and that newbies mess up but....when u write vtec as vtech i can pretend that it was a mess up...when u write it twice i know that u got it wrong in your head....fix that it's vtec not vtech!....... <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/tounge.gif" border="0" valign="absmiddle" alt='

'>  <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/wink.gif" border="0" valign="absmiddle" alt='

'>

nissan, toyota, and most of the others have use the cheaper valve control technologies. honda choose to use the more expensive valve control technology...not that nissan doesnt know how to do it....but becuase of $.. i'd go more in detail but i dont think u'd understand anywayz..the new bmw system uses and amazing 3rd cam profile, so it switches twice....unlike all the other that switch only once <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/biggrin.gif" border="0" valign="absmiddle" alt='

'> <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/notify.gif" border="0" valign="absmiddle" alt=':notify:'>

*DSC* · 03-09-2002, 04:30 PM

Screw vtec, we should switch to using silinoids (sp? <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/wow.gif" border="0" valign="absmiddle" alt=':0'>) I will own the first car with silanoids (kan't spell) instead of camshafts and a cvt tranny <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/biggrin.gif" border="0" valign="absmiddle" alt='

'>

White240sx · 03-09-2002, 04:48 PM

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (XylathaneGTR @ Mar. 07 2002,5:57)</td></tr><tr><td id="QUOTE">BMW came out with a new one called Valvetronic or something...and it's suppsoed to be freaking amazing...</td></tr></table><span id='postcolor'>
Are you talking about what's in the New 7 series? It's so advanced; it negates the use of a throttle body. It uses valve lift to control the engine speed, by implementing an intermediate arm, whose pivot point can be altered to affect the lift of the valve. The double VANOS system is also a part of Valvetronic. It's projected that this technology will be available in the entire line in a few short years, which gives engine tuners something to look forward to.

camppain · 03-09-2002, 04:57 PM

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (wherezmytofu @ Mar. 07 2002,6:06)</td></tr><tr><td id="QUOTE">i understand that ur a newbie and that newbies mess up but....when u write vtec as vtech i can pretend that it was a mess up...when u write it twice i know that u got it wrong in your head....fix that it's vtec not vtech!....... <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/tounge.gif" border="0" valign="absmiddle" alt='

'> <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/wink.gif" border="0" valign="absmiddle" alt='

'>

nissan, toyota, and most of the others have use the cheaper valve control technologies. honda choose to use the more expensive valve control technology...not that nissan doesnt know how to do it....but becuase of $.. i'd go more in detail but i dont think u'd understand anywayz..the new bmw system uses and amazing 3rd cam profile, so it switches twice....unlike all the other that switch only once <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/biggrin.gif" border="0" valign="absmiddle" alt='

'> <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/notify.gif" border="0" valign="absmiddle" alt=':notify:'></td></tr></table><span id='postcolor'>
had to be tofu <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/wink.gif" border="0" valign="absmiddle" alt='

'>

i got one for you nissan's neo vvl in the sr20ve and sr16ve engines

alotta nissan cars had variable timing the older maximas forgot the engine code

the 300's

its been around

XylathaneGTR · 03-09-2002, 06:44 PM

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (White240sx @ Mar. 08 2002,5:48)</td></tr><tr><td id="QUOTE"></span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (XylathaneGTR @ Mar. 07 2002,5:57)</td></tr><tr><td id="QUOTE">BMW came out with a new one called Valvetronic or something...and it's suppsoed to be freaking amazing...</td></tr></table><span id='postcolor'>
Are you talking about what's in the New 7 series? It's so advanced; it negates the use of a throttle body. It uses valve lift to control the engine speed, by implementing an intermediate arm, whose pivot point can be altered to affect the lift of the valve. The double VANOS system is also a part of Valvetronic. It's projected that this technology will be available in the entire line in a few short years, which gives engine tuners something to look forward to.</td></tr></table><span id='postcolor'>
one sec, lemmie grab the mag i saw it in

In February 2002, Volume 14 no. 2 of Sport Compact Car...Page 14, in the TechnoBabble colum

It says,  
BMW's new valvetronic is the first production variable valve timing system capable of delivering infinitely variable lift and timing, an accomplishment with far reaching effects thruought the engine.

Valvetronic is a confusing grab of rockerarms, roller followers, springs, eccentrics, anc cam lobes. Most of these parts just get in the way of understanding how it works...Valvetronic uses a conventional cam lobe and a conventional rocker arm, but between them is an intermediat arm.  The cam pushes sideways on the midle of the intermediate arm, and the intermediat arm, pushes on the conventional rocker arm...
The foot of the intermediate arm, the part actually pushing on the rocker arm, has 2 parts.  the lazy part, is preciesely contoured to slide along the rockerarms roller follower without actually pushing on it...the hard working side of the foot, is shaped to actually open the valve.

The magic part is...The intermediate arms pivot point can be moved back and forth, which changes which side of the intermediate arm's foot gets used.   When full lift is needed, the piviot point moves to the right. This makes the hard working side of the foot, allowing up to 9.1mm of valve lift.  When less valve lift is needed, the piviot point moves left, letting the lazy side of the foot roll around uselessly on the rocker arm.  Only as the very tip of the cam lobe reachs the intermediat arm's roller does the valve finally pop open ever so briefly.  When the pivot moved all the way to the left, the valve never opens at all.  

Whew...thats the main part of the article...the diagrams would be usefull <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/biggrin.gif" border="0" valign="absmiddle" alt='

'>
BMW is working to incorporate it in all its production engines, the first, the 1.8 Liter four in the 316ti, went into production in June 2001.  The first valvetronic engines to appear in the US will be in the new 7 series, and an entire valvetronic equiped line will be avalible in a few years.

So yes...Your right.

tnord · 03-09-2002, 07:41 PM

technobabble is definitely one of my favorite parts of SCC. i had to read through that article about 3 times to understand how it worked. but now of course i don't remember. and as usual, BMW is leading the way in automotive development. doesn't the new M3 have valvetronic? or does it still have the double vanos system?

Takumi · 03-09-2002, 08:02 PM

Blah, it's just an easy way for car companies to pump out more power out of their vehicles without screwing too much with the emissions. Slap on a fancy name on the technology like Mitsubishi's MiVEC, Toyota's VVT-i, Honda's VTEC, and whatever, you've got people going, "OMG, IT SOUNDS SO KEWL! NOW I CAN BUY STICKARZ FOR IT!" Great for n/a tuning and such, but I could care less if I'm going to turbocharge a car with a variable-timing system since that's going to get ditched anyway in some cases.

tnord · 03-09-2002, 08:36 PM

iirc.....vvt is for improved fuel mileage. it just allows them to crank in more fuel/air which of course makes more power, but with vvt, the fuel mileage stays the same. i'm pretty sure i read an article that stated something of that nature.

XylathaneGTR · 03-09-2002, 08:52 PM

Yeah, TechnoBabble is really one of the best car magazine articles...it was funny as hell when he was trashing the "Pontiac Vibe GT-R" in March 2002.
But that was a very good article...Im not sure if the m has Valvetronic, as far as i know, its still using a DoubleVanos system...but without a doubt, it will get the Valvetronic if it doesn't already....In Europe it might have it already tho.
...I saw a pic of a Celica GTS with VVTL-I plastered all over it...oh so sad...it was like seeing a Daily civic with 'DOHC VTEC BOOST INSIDE' crap, but...on a whole new level

White240sx · 03-10-2002, 01:54 AM

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (tnord @ Mar. 07 2002,9:41)</td></tr><tr><td id="QUOTE">doesn't the new M3 have valvetronic? or does it still have the double vanos system?</td></tr></table><span id='postcolor'>
IIRC it has ITBs, VANOS, and variable lift.

camppain · 03-10-2002, 02:07 AM

http://autozine.kyul.net/technical_s...dex.htm#Engine

a great site with great tech articles

<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/wink.gif" border="0" valign="absmiddle" alt='

'> check it out for more info

thewholefnshow · 03-10-2002, 08:17 AM

The big thing about bimmer is it is a constantly variable valve timing system. Porche and Ferrari both have something simlar, it changes duration and height throughout the whole band, many of the japanese counterparts are simple on off switches, like vtec, but for the most part honda and ferrari were the pioneers in this area. If you go to howstuffworks.com they have a cool article explaining ferrari and honda.... There are no american manufacturers of variable timing other than dodge who has (wait for the name here) j-tec, that they currently have in there large trucks (testing grounds I guess)

Takumi · 03-10-2002, 10:26 AM

Ford has that ZTEC whatever variable timing system that they had on their Ford Escorts a few years back with their ZX2 models.  I think they got 'em in their Ford Focus'.

XylathaneGTR · 03-10-2002, 10:37 AM

Yeah, they have them in the new focus.
Ferrari first started using it in their track cars in like, the fucking 60's...so its been around for a while

03-09-2002, 02:00 PM	#1
Ni240sxt Join Date: Dec 2001 Posts: 34 Trader Rating: (0) Feedback Score: 0 reviews	When i was looking at the spec of the new Nissan Sentra SE-R, i notice they have something call Continuously Variable Valve Timing COntrol and Variable Intake System, is that like a Nissan Version of a VTech or VVTL-I or something? Also when i was reading Road and Track i read something about Audi and BMW using the same technology. <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/crazy.gif" border="0" valign="absmiddle" alt=':crazy:'>  <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/crazy.gif" border="0" valign="absmiddle" alt=':crazy:'>  <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/notify.gif" border="0" valign="absmiddle" alt=':notify:'>  <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/notify.gif" border="0" valign="absmiddle" alt=':notify:'> __________________ www.pssh.com

03-09-2002, 03:22 PM	#3
DSC New Title Join Date: Aug 2001 Location: VA Posts: 3,454 Trader Rating: (0) Feedback Score: 0 reviews	I think BMW gave their a fancy name too, vanos? No clue what it stands for. But I agree with s13grl, I think honda is the only one to actually put it on the side of their car <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/dozingoff.gif" border="0" valign="absmiddle" alt=''> But most everybody has at least one car out with some sort of variable valve timeing. __________________

03-09-2002, 03:57 PM	#4
XylathaneGTR Zilvia Junkie Join Date: Mar 2002 Posts: 362 Trader Rating: (0) Feedback Score: 0 reviews	Yo, Ni240sxt...yes, i think it is... every company does have Variable Valve Timing and stuff like that,  BMW came out with a new one called Valvetronic or something...and it's suppsoed to be freaking amazing... __________________ Ima newbie...! yay! Hopefully getting s14 with s15 sr20...

03-09-2002, 04:06 PM	#5
wherezmytofu BANNED Join Date: Nov 2001 Posts: 1,873 Trader Rating: (0) Feedback Score: 0 reviews	i understand that ur a newbie and that newbies mess up but....when u write vtec as vtech i can pretend that it was a mess up...when u write it twice i know that u got it wrong in your head....fix that it's vtec not vtech!....... <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/tounge.gif" border="0" valign="absmiddle" alt=''>  <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/wink.gif" border="0" valign="absmiddle" alt=''> nissan, toyota, and most of the others have use the cheaper valve control technologies. honda choose to use the more expensive valve control technology...not that nissan doesnt know how to do it....but becuase of $.. i'd go more in detail but i dont think u'd understand anywayz..the new bmw system uses and amazing 3rd cam profile, so it switches twice....unlike all the other that switch only once <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/biggrin.gif" border="0" valign="absmiddle" alt=''> <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/notify.gif" border="0" valign="absmiddle" alt=':notify:'>

03-09-2002, 04:30 PM	#6
DSC New Title Join Date: Aug 2001 Location: VA Posts: 3,454 Trader Rating: (0) Feedback Score: 0 reviews	Screw vtec, we should switch to using silinoids (sp? <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/wow.gif" border="0" valign="absmiddle" alt=':0'>) I will own the first car with silanoids (kan't spell) instead of camshafts and a cvt tranny <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/biggrin.gif" border="0" valign="absmiddle" alt=''> __________________

03-09-2002, 02:12 PM	#2
S13Grl Married to the Mob Join Date: Dec 2000 Age: 44 Posts: 3,670 Trader Rating: (0) Feedback Score: 0 reviews	Every major auto maker uses a Variable Valve Timing technology. It's Toyota and Honda that choose to put a fancy name on it and make it a bigger deal than it actually is.

03-09-2002, 04:48 PM	#7
White240sx Zilvia Member Join Date: Nov 2001 Posts: 219 Trader Rating: (0) Feedback Score: 0 reviews	</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (XylathaneGTR @ Mar. 07 2002,5:57)</td></tr><tr><td id="QUOTE">BMW came out with a new one called Valvetronic or something...and it's suppsoed to be freaking amazing...</td></tr></table><span id='postcolor'> Are you talking about what's in the New 7 series? It's so advanced; it negates the use of a throttle body. It uses valve lift to control the engine speed, by implementing an intermediate arm, whose pivot point can be altered to affect the lift of the valve. The double VANOS system is also a part of Valvetronic. It's projected that this technology will be available in the entire line in a few short years, which gives engine tuners something to look forward to. __________________ -Mason

03-09-2002, 04:57 PM	#8
camppain Will never get banned... Join Date: Sep 2001 Location: San Diego CA Age: 45 Posts: 1,510 Trader Rating: (0) Feedback Score: 0 reviews	</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (wherezmytofu @ Mar. 07 2002,6:06)</td></tr><tr><td id="QUOTE">i understand that ur a newbie and that newbies mess up but....when u write vtec as vtech i can pretend that it was a mess up...when u write it twice i know that u got it wrong in your head....fix that it's vtec not vtech!....... <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/tounge.gif" border="0" valign="absmiddle" alt=''> <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/wink.gif" border="0" valign="absmiddle" alt=''> nissan, toyota, and most of the others have use the cheaper valve control technologies. honda choose to use the more expensive valve control technology...not that nissan doesnt know how to do it....but becuase of $.. i'd go more in detail but i dont think u'd understand anywayz..the new bmw system uses and amazing 3rd cam profile, so it switches twice....unlike all the other that switch only once <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/biggrin.gif" border="0" valign="absmiddle" alt=''> <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/notify.gif" border="0" valign="absmiddle" alt=':notify:'></td></tr></table><span id='postcolor'> had to be tofu <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/wink.gif" border="0" valign="absmiddle" alt=''> i got one for you nissan's neo vvl in the sr20ve and sr16ve engines alotta nissan cars had variable timing the older maximas forgot the engine code the 300's its been around __________________ -=-99 Sentra SE 5 speed-=- -=-95 240 SE 5 speed-=-

03-09-2002, 06:44 PM	#9
XylathaneGTR Zilvia Junkie Join Date: Mar 2002 Posts: 362 Trader Rating: (0) Feedback Score: 0 reviews	</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (White240sx @ Mar. 08 2002,5:48)</td></tr><tr><td id="QUOTE"></span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (XylathaneGTR @ Mar. 07 2002,5:57)</td></tr><tr><td id="QUOTE">BMW came out with a new one called Valvetronic or something...and it's suppsoed to be freaking amazing...</td></tr></table><span id='postcolor'> Are you talking about what's in the New 7 series? It's so advanced; it negates the use of a throttle body. It uses valve lift to control the engine speed, by implementing an intermediate arm, whose pivot point can be altered to affect the lift of the valve. The double VANOS system is also a part of Valvetronic. It's projected that this technology will be available in the entire line in a few short years, which gives engine tuners something to look forward to.</td></tr></table><span id='postcolor'> one sec, lemmie grab the mag i saw it in In February 2002, Volume 14 no. 2 of Sport Compact Car...Page 14, in the TechnoBabble colum It says,   BMW's new valvetronic is the first production variable valve timing system capable of delivering infinitely variable lift and timing, an accomplishment with far reaching effects thruought the engine. Valvetronic is a confusing grab of rockerarms, roller followers, springs, eccentrics, anc cam lobes. Most of these parts just get in the way of understanding how it works...Valvetronic uses a conventional cam lobe and a conventional rocker arm, but between them is an intermediat arm.  The cam pushes sideways on the midle of the intermediate arm, and the intermediat arm, pushes on the conventional rocker arm... The foot of the intermediate arm, the part actually pushing on the rocker arm, has 2 parts.  the lazy part, is preciesely contoured to slide along the rockerarms roller follower without actually pushing on it...the hard working side of the foot, is shaped to actually open the valve. The magic part is...The intermediate arms pivot point can be moved back and forth, which changes which side of the intermediate arm's foot gets used.   When full lift is needed, the piviot point moves to the right. This makes the hard working side of the foot, allowing up to 9.1mm of valve lift.  When less valve lift is needed, the piviot point moves left, letting the lazy side of the foot roll around uselessly on the rocker arm.  Only as the very tip of the cam lobe reachs the intermediat arm's roller does the valve finally pop open ever so briefly.  When the pivot moved all the way to the left, the valve never opens at all.   Whew...thats the main part of the article...the diagrams would be usefull <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/biggrin.gif" border="0" valign="absmiddle" alt=''> BMW is working to incorporate it in all its production engines, the first, the 1.8 Liter four in the 316ti, went into production in June 2001.  The first valvetronic engines to appear in the US will be in the new 7 series, and an entire valvetronic equiped line will be avalible in a few years. So yes...Your right. __________________ Ima newbie...! yay! Hopefully getting s14 with s15 sr20...

03-09-2002, 07:41 PM	#10
tnord Nissanaholic! Join Date: Dec 2001 Posts: 1,975 Trader Rating: (0) Feedback Score: 0 reviews	technobabble is definitely one of my favorite parts of SCC. i had to read through that article about 3 times to understand how it worked. but now of course i don't remember. and as usual, BMW is leading the way in automotive development. doesn't the new M3 have valvetronic? or does it still have the double vanos system?

03-09-2002, 08:02 PM	#11
Takumi Zilvia Addict Join Date: Nov 2001 Location: Bay Area, CA Age: 44 Posts: 836 Trader Rating: (0) Feedback Score: 0 reviews	Blah, it's just an easy way for car companies to pump out more power out of their vehicles without screwing too much with the emissions. Slap on a fancy name on the technology like Mitsubishi's MiVEC, Toyota's VVT-i, Honda's VTEC, and whatever, you've got people going, "OMG, IT SOUNDS SO KEWL! NOW I CAN BUY STICKARZ FOR IT!" Great for n/a tuning and such, but I could care less if I'm going to turbocharge a car with a variable-timing system since that's going to get ditched anyway in some cases. __________________ 2000 Subaru Impreza 2.5RS (GC6) Yes, I am a devoted Scooby driver, but I still got love for the Nissans and I always will. =)

03-09-2002, 08:36 PM	#12
tnord Nissanaholic! Join Date: Dec 2001 Posts: 1,975 Trader Rating: (0) Feedback Score: 0 reviews	iirc.....vvt is for improved fuel mileage. it just allows them to crank in more fuel/air which of course makes more power, but with vvt, the fuel mileage stays the same. i'm pretty sure i read an article that stated something of that nature.

03-09-2002, 08:52 PM	#13
XylathaneGTR Zilvia Junkie Join Date: Mar 2002 Posts: 362 Trader Rating: (0) Feedback Score: 0 reviews	Yeah, TechnoBabble is really one of the best car magazine articles...it was funny as hell when he was trashing the "Pontiac Vibe GT-R" in March 2002. But that was a very good article...Im not sure if the m has Valvetronic, as far as i know, its still using a DoubleVanos system...but without a doubt, it will get the Valvetronic if it doesn't already....In Europe it might have it already tho. ...I saw a pic of a Celica GTS with VVTL-I plastered all over it...oh so sad...it was like seeing a Daily civic with 'DOHC VTEC BOOST INSIDE' crap, but...on a whole new level __________________ Ima newbie...! yay! Hopefully getting s14 with s15 sr20...

03-10-2002, 01:54 AM	#14
White240sx Zilvia Member Join Date: Nov 2001 Posts: 219 Trader Rating: (0) Feedback Score: 0 reviews	</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (tnord @ Mar. 07 2002,9:41)</td></tr><tr><td id="QUOTE">doesn't the new M3 have valvetronic? or does it still have the double vanos system?</td></tr></table><span id='postcolor'> IIRC it has ITBs, VANOS, and variable lift. __________________ -Mason

03-10-2002, 02:07 AM	#15
camppain Will never get banned... Join Date: Sep 2001 Location: San Diego CA Age: 45 Posts: 1,510 Trader Rating: (0) Feedback Score: 0 reviews	http://autozine.kyul.net/technical_s...dex.htm#Engine a great site with great tech articles <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/wink.gif" border="0" valign="absmiddle" alt=''> check it out for more info __________________ -=-99 Sentra SE 5 speed-=- -=-95 240 SE 5 speed-=-

03-10-2002, 08:17 AM	#16
thewholefnshow Zilvia Addict Join Date: Nov 2001 Posts: 672 Trader Rating: (0) Feedback Score: 0 reviews	The big thing about bimmer is it is a constantly variable valve timing system. Porche and Ferrari both have something simlar, it changes duration and height throughout the whole band, many of the japanese counterparts are simple on off switches, like vtec, but for the most part honda and ferrari were the pioneers in this area. If you go to howstuffworks.com they have a cool article explaining ferrari and honda.... There are no american manufacturers of variable timing other than dodge who has (wait for the name here) j-tec, that they currently have in there large trucks (testing grounds I guess)

03-10-2002, 10:26 AM	#17
Takumi Zilvia Addict Join Date: Nov 2001 Location: Bay Area, CA Age: 44 Posts: 836 Trader Rating: (0) Feedback Score: 0 reviews	Ford has that ZTEC whatever variable timing system that they had on their Ford Escorts a few years back with their ZX2 models.  I think they got 'em in their Ford Focus'. __________________ 2000 Subaru Impreza 2.5RS (GC6) Yes, I am a devoted Scooby driver, but I still got love for the Nissans and I always will. =)

03-10-2002, 10:37 AM	#18
XylathaneGTR Zilvia Junkie Join Date: Mar 2002 Posts: 362 Trader Rating: (0) Feedback Score: 0 reviews	Yeah, they have them in the new focus. Ferrari first started using it in their track cars in like, the fucking 60's...so its been around for a while __________________ Ima newbie...! yay! Hopefully getting s14 with s15 sr20...