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Old June 27th, 2006, 08:26 AM   #1
MichaelBenz
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VTEC Explained - What Is It?

Ok...for the total newbie in us all...I have uploaded this graphic in order to explain how v-tec works, ect.


Taken from Acura Service Consultant Illustrated Technical Guide, copyright 2005 American Honda Motor Co., Inc.

Last edited by MichaelBenz; February 18th, 2008 at 10:30 AM..
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Old June 27th, 2006, 08:40 AM   #2
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I liked this explaination better
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Old June 27th, 2006, 12:46 PM   #3
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excellent explanation, but out of curiosity, has anyone had that pin that locks the hi and lo camlobes misfire and self destruct in the engine? i would imagine that the timing on that insertion has to be precise.

SSTS
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Old June 27th, 2006, 01:11 PM   #4
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Quote:
Originally Posted by SatinSilverTypS
excellent explanation, but out of curiosity, has anyone had that pin that locks the hi and lo camlobes misfire and self destruct in the engine? i would imagine that the timing on that insertion has to be precise.

SSTS
Yeah it'll happen when the VTEC solenoid doesn't get enough lubrication provided by the SAE GL-7 VTEC fluid.
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Old June 27th, 2006, 01:15 PM   #5
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Quote:
Originally Posted by Accord_V6_400m
Yeah it'll happen when the VTEC solenoid doesn't get enough lubrication provided by the SAE GL-7 VTEC fluid.
stop blaming your car blowup on vtec fluid. you know you suck teH driving.
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Old June 27th, 2006, 01:33 PM   #6
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Quote:
Originally Posted by OwAce
stop blaming your car blowup on vtec fluid. you know you suck teH driving.
I make sure I remind you when your car blows up trying so hard to keep up with mine
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Old June 27th, 2006, 01:37 PM   #7
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Quote:
Originally Posted by Accord_V6_400m
Yeah it'll happen when the VTEC solenoid doesn't get enough lubrication provided by the SAE GL-7 VTEC fluid.
make sure to get the synthetic kind tho, you want your v-tec to kick in SmmmooOOthh
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Old June 27th, 2006, 02:03 PM   #8
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Quote:
Originally Posted by Red02AccordV6_2
make sure to get the synthetic kind tho, you want your v-tec to kick in SmmmooOOthh
Actually I called Honda of America and they told me that they use synthetic OEM fluid because of the high sheer forces encountered by the locking pins.
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Old June 27th, 2006, 08:05 PM   #9
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our "low end" cams are still very underpowered - thats why people change out the CL-S cams to ours get even MORE power out of the non-VTEC area. i believe there is a diagram comparing the CL-S and the Av6 cams - the lobes of the CL-S rise up much more than the AV6 ones do - thus making the CL-S much more aggressive
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Old June 27th, 2006, 10:12 PM   #10
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all variable valve systems (vtec, vvti, mivec, neovvl,vanos) only control the intake valves correct?

and are there any american "vtec" systems?
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Old June 27th, 2006, 10:28 PM   #11
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ford has vortec? or somthin like that

btw, can cls cams work with i4?
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Old June 28th, 2006, 06:26 AM   #12
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Quote:
Originally Posted by Accord_V6_400m
I make sure I remind you when your car blows up trying so hard to keep up with mine
yes i like a challenge so i race you in reverse. then car go boom.
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Old June 28th, 2006, 06:36 AM   #13
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Quote:
Originally Posted by inspired1

I liked this explaination better
how does the vtec system work with XM radio?
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Old June 28th, 2006, 06:47 AM   #14
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Quote:
Originally Posted by BadgerType
ford has vortec? or somthin like that

btw, can cls cams work with i4?
GM has vortec and has nothing to do with this conversation.

Well if you look at the CLS cams, I'm sure you might be able to jam them in there, but you'll figure out the problem when you go to bolt the rest of the valvetrain back in--the CL-S cams only actuate 3 cylinders
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Old June 28th, 2006, 07:02 AM   #15
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Quote:
Originally Posted by VTEC-v6!
the CL-S cams only actuate 3 cylinders
thats all i need to beat accord_v6_400m..
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Old June 28th, 2006, 10:11 AM   #16
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<<<< shoots self in head

yeah... maybe i should stop typing now
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Old June 28th, 2006, 12:45 PM   #17
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Quote:
Originally Posted by OwAce
thats all i need to beat accord_v6_400m..
Is that after you realize that you don't know which three cylinders to use without making your car run like crap
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Old June 28th, 2006, 01:04 PM   #18
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Quote:
Originally Posted by Accord_V6_400m
Is that after you realize that you don't know which three cylinders to use without making your car run like crap
at least it ran to the finish line. and beat you in the process!
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Old July 6th, 2006, 05:38 AM   #19
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Quote:
Originally Posted by OwAce
at least it ran to the finish line. and beat you in the process!

lollllllll you guys are mad funny.....good explanation about vtec by the way......god i love vtec
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Old July 6th, 2006, 06:02 AM   #20
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That illustration is a little misleading. The locking pins are actually much smaller and are housed within the rocker arms. This one is a much more accurate model.

Three Stage VTEC shown:


Quote:
Originally Posted by SatinSilverTypS
excellent explanation, but out of curiosity, has anyone had that pin that locks the hi and lo camlobes misfire and self destruct in the engine? i would imagine that the timing on that insertion has to be precise.

SSTS
According to TopGear, Honda has produced over 15 million VTEC systems and none of them have ever failed due to a mechanical issue.

Quote:
Originally Posted by Red02AccordV6_2
all variable valve systems (vtec, vvti, mivec, neovvl,vanos) only control the intake valves correct?
Toyota's VVT-I and BMW's Vanos are cam phasing systems, not valve lift. VVTL-I and Valvetronic are valve lift systems.
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Old July 6th, 2006, 11:20 AM   #21
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Quote:
Originally Posted by OwAce
at least it ran to the finish line. and beat you in the process!
You beat me in a foot race
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Old July 6th, 2006, 01:36 PM   #22
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Quote:
Originally Posted by Accord_V6_400m
You beat me in a foot race
yes me on foot, you in your car.
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Old July 6th, 2006, 03:46 PM   #23
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Aren't the iVTEC suppose to be valve lifting and cam phasing?
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Old July 6th, 2006, 06:21 PM   #24
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Quote:
Originally Posted by wildpikachu
Aren't the iVTEC suppose to be valve lifting and cam phasing?
Correct and there are two different K series DOHC versions. The one in the 7th gen Civic SI, Accord inline 4, CR-V, Element, RSX, and RDX have a two rocker valve lift system on the intake cam only. The exhaust cam doesn't have valve lift. This is usually referred to as "economy I-VTEC" even though Honda doesn't have a specific label/name for it.

The K series in the RSX-S, TSX, and 8th gen Civic SI have a 3 rocker valve lift system on both the intake and exhaust cams. All of the current K series engines have a VTC (Variable Timing Control) cam phasing unit on the intake cam only.

* Note: All info based on USDM 2006 model year vehicles except for the RDX which is a 2007 model.
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Old July 7th, 2006, 01:20 PM   #25
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wat car gives the 'best and loudest' intake/vtec engagement noise on the hondas/acuras??? im assuming any DOHC v6??? i think my car makes a loud noise/growl but i think it cud b louder at NON wot times
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Old July 8th, 2006, 03:51 AM   #26
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Quote:
Originally Posted by kleptodathief
wat car gives the 'best and loudest' intake/vtec engagement noise on the hondas/acuras??? im assuming any DOHC v6??? i think my car makes a loud noise/growl but i think it cud b louder at NON wot times
From what I hear, the Integra Type R (B18C) has the loudest VTEC crossover noise.
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Old July 9th, 2006, 07:31 AM   #27
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Quote:
Originally Posted by Plumaccordcoupe
That illustration is a little misleading. The locking pins are actually much smaller and are housed within the rocker arms. This one is a much more accurate model.

Three Stage VTEC shown:




According to TopGear, Honda has produced over 15 million VTEC systems and none of them have ever failed due to a mechanical issue.



Toyota's VVT-I and BMW's Vanos are cam phasing systems, not valve lift. VVTL-I and Valvetronic are valve lift systems.
Yes...that illustration at the top is out of the Technical Service Advisors handbook for newbies more or less. They have it at Acura dealers to help explain different systems to customers that are totally unfamiliar with anything (ladies, ect) what they are doing to their cars...so getting too technical in that case would kind of defeat the purpose. Excellent addition to the thread though...makes it even more useful here. This thread has developed out well with some great information!
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Old July 9th, 2006, 06:50 PM   #28
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http://videos.streetfire.net/search/...E74118BB4A.htm
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Old July 9th, 2006, 06:58 PM   #29
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or this http://videos.streetfire.net/search/...52F982ED3A.htm
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Old July 11th, 2006, 10:59 PM   #30
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Quote:
Originally Posted by NawlinsV6
Quote:
Originally Posted by NawlinsV6
Great additions to this thread . The first video is SOHC VTEC and the second video is DOHC VTEC.
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