what is VTEC?
02-07-2007, 05:00 PM
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Wish
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what is VTEC?
well i know Vtec is and how it works and all however........ though i know by theory. practically.. how can u tell when u HIT vtec in our Tl's.... at wat RPM approx? .. aroudn 5-6K ?....
is it when u hear that very roaring sound ? because i have no clue.. i thought VTEC was always there.. working.. while during low and high rpms to save fuel and provide power.... fill me in guys... thanks...
all comments are welcome.. ..
is it when u hear that very roaring sound ? because i have no clue.. i thought VTEC was always there.. working.. while during low and high rpms to save fuel and provide power.... fill me in guys... thanks...
all comments are welcome.. ..
02-07-2007, 05:29 PM
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ya i read and it says 5200 is when we hit vtec.. now...
most of the type i slam the gas.... it goes up to like 5K+ ... then shifts... and eventually drops down...
is there any way to keep it at 5K so its always in vtec while driving? .. especaily for instant power?...
i was going at about 120KM and dropped it down to 2nd.... thats the highest i've gone in 2nd.... i was going at 150KM in 3rd gear.. all of this by the way is in sports shift mode...
so am i taking advantage of vtec or was i killin my gears gonig at these speeds in such low gears?
GEAR 4 SUCKS ASS by the way.
most of the type i slam the gas.... it goes up to like 5K+ ... then shifts... and eventually drops down...
is there any way to keep it at 5K so its always in vtec while driving? .. especaily for instant power?...
i was going at about 120KM and dropped it down to 2nd.... thats the highest i've gone in 2nd.... i was going at 150KM in 3rd gear.. all of this by the way is in sports shift mode...
so am i taking advantage of vtec or was i killin my gears gonig at these speeds in such low gears?
GEAR 4 SUCKS ASS by the way.
02-07-2007, 05:32 PM
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Originally Posted by t7n7
is there any way to keep it at 5K so its always in vtec while driving? .. especaily for instant power?....
and you should know when you hit vtec, you should hear it
02-07-2007, 05:37 PM
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like what.. a loud roar? vrrom.. ROFL... u can hear that in any car when u slam the gas to the floor.... even my 01 es300 roared ilke a beast, i think it had VVTI and my old camry did the same thing.. i mean should i be listening in for a specific tone? ...
ahhh i wish i lived in the uS.. i wouldj ust drive down and meet one of u guys to help me out..... i don't mind drivin as long as i get the help i need.....
if any one is living near the canadian border.. let me know.. (near ontario) , i will drive down.. we can have beer, and do some mods :P
ahhh i wish i lived in the uS.. i wouldj ust drive down and meet one of u guys to help me out..... i don't mind drivin as long as i get the help i need.....
if any one is living near the canadian border.. let me know.. (near ontario) , i will drive down.. we can have beer, and do some mods :P
02-07-2007, 05:46 PM
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Vtec kinda pops (not an explosion) if you've ever had an exhaust on a vtec car or on this one you will know wat im talking about....also it wouldnt be a great idea to keep your car at 5k all the time since cracking vtec wastes alot more gas....hope that helps
02-07-2007, 05:53 PM
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VARIABLE VALVE TIMING AND LIFT ELECTRONIC CONTROL (VTEC)
First unveiled on the Acura NSX supercar, the innovative Variable Valve Timing and Lift Electronic Control (VTEC) system is a key player in the TL engine's remarkable combination of high-power and impressive fuel efficiency.
Unlike engines with conventional fixed-timing intake valves, the TL's VTEC engines automatically optimize themselves according to engine speed. By altering the lift and opening duration of the intake valves depending on engine rpm, VTEC helps the engine produce abundant low- and mid-range torque with no sacrifice in high-rpm power. Indeed, at high rpm the VTEC V-6 produces considerably more horsepower than other engines of its size.
At low rpm, the VTEC intake valves follow a set of low-lift, short-duration cam lobes with timing that optimizes cylinder filling. In addition, the timing of the intake valves is staggered and their lift asymmetric -- creating a swirl effect within the combustion chambers at lower RPM. The result is increased burn speed with improved combustion stability and an increase in allowable EGR rate. As the engine spins through 4400 rpm (4800 rpm on the Type-S), the intake rocker arms transition to actuation by high-lift, long-duration cam lobes designed to optimize high-rpm output.
On the Type-S, high-performance camshafts further increase power output by providing longer intake-valve duration, more valve overlap, and additional lift for the exhaust valves.
First unveiled on the Acura NSX supercar, the innovative Variable Valve Timing and Lift Electronic Control (VTEC) system is a key player in the TL engine's remarkable combination of high-power and impressive fuel efficiency.
Unlike engines with conventional fixed-timing intake valves, the TL's VTEC engines automatically optimize themselves according to engine speed. By altering the lift and opening duration of the intake valves depending on engine rpm, VTEC helps the engine produce abundant low- and mid-range torque with no sacrifice in high-rpm power. Indeed, at high rpm the VTEC V-6 produces considerably more horsepower than other engines of its size.
At low rpm, the VTEC intake valves follow a set of low-lift, short-duration cam lobes with timing that optimizes cylinder filling. In addition, the timing of the intake valves is staggered and their lift asymmetric -- creating a swirl effect within the combustion chambers at lower RPM. The result is increased burn speed with improved combustion stability and an increase in allowable EGR rate. As the engine spins through 4400 rpm (4800 rpm on the Type-S), the intake rocker arms transition to actuation by high-lift, long-duration cam lobes designed to optimize high-rpm output.
On the Type-S, high-performance camshafts further increase power output by providing longer intake-valve duration, more valve overlap, and additional lift for the exhaust valves.
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02-07-2007, 06:00 PM
#8
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Originally Posted by t7n7
ya i read and it says 5200 is when we hit vtec.. now...
most of the type i slam the gas.... it goes up to like 5K+ ... then shifts... and eventually drops down...
is there any way to keep it at 5K so its always in vtec while driving? .. especaily for instant power?...
i was going at about 120KM and dropped it down to 2nd.... thats the highest i've gone in 2nd.... i was going at 150KM in 3rd gear.. all of this by the way is in sports shift mode...
so am i taking advantage of vtec or was i killin my gears gonig at these speeds in such low gears?
GEAR 4 SUCKS ASS by the way.
most of the type i slam the gas.... it goes up to like 5K+ ... then shifts... and eventually drops down...
is there any way to keep it at 5K so its always in vtec while driving? .. especaily for instant power?...
i was going at about 120KM and dropped it down to 2nd.... thats the highest i've gone in 2nd.... i was going at 150KM in 3rd gear.. all of this by the way is in sports shift mode...
so am i taking advantage of vtec or was i killin my gears gonig at these speeds in such low gears?
GEAR 4 SUCKS ASS by the way.
Want to know when you hit VTEC. Take out your intake resonator. You will hear when it does
02-07-2007, 06:19 PM
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http://www.youtube.com/watch?v=xutwFoidAjw
You can hear it activate at the 3-4 second mark, and it stays in VTEC through the gears until I let off.
You can hear it activate at the 3-4 second mark, and it stays in VTEC through the gears until I let off.
02-07-2007, 06:32 PM
#10
05 Acura TL: a-spec
Originally Posted by PiZauL
http://www.youtube.com/watch?v=xutwFoidAjw
You can hear it activate at the 3-4 second mark, and it stays in VTEC through the gears until I let off.
You can hear it activate at the 3-4 second mark, and it stays in VTEC through the gears until I let off.
02-07-2007, 06:40 PM
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Originally Posted by PiZauL
http://www.youtube.com/watch?v=xutwFoidAjw
You can hear it activate at the 3-4 second mark, and it stays in VTEC through the gears until I let off.
You can hear it activate at the 3-4 second mark, and it stays in VTEC through the gears until I let off.
02-07-2007, 06:41 PM
#12
4700 rpm is the spec for my 01TL for vtec kick in
Its so obvious you would have to have the stereo cranked not to notice the engine tone change and resultant push back into the seat
That and the quickly falling fuel guage
Its so obvious you would have to have the stereo cranked not to notice the engine tone change and resultant push back into the seat
That and the quickly falling fuel guage
02-07-2007, 07:34 PM
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Originally Posted by t7n7
well i know Vtec is and how it works and all however........
is it when u hear that very roaring sound ? because i have no clue..
all comments are welcome.. ..
is it when u hear that very roaring sound ? because i have no clue..
all comments are welcome.. ..
02-07-2007, 07:54 PM
#15
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lol.. NICE YOUTUBE VIDEo. .heeheh thats exactly wat i hear and i always thought that was VTEC but i hear it so often that i thought maybe i should be hearing something more unique lol....
almost everyday , i hit vtec numeous times hehe... eh... not bad.... i guess i should change my headers/intake/exhaust so i can feel wat a type s feelings like...
thanks guys.... love the support in this forum. ...
almost everyday , i hit vtec numeous times hehe... eh... not bad.... i guess i should change my headers/intake/exhaust so i can feel wat a type s feelings like...
thanks guys.... love the support in this forum. ...
yours..
02-07-2007, 08:17 PM
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well to keep it simple, it allows the car to preserve fuel economy at lower rpms and provide high end power at higher rpms....
like having a 2-1 engine..... UNLIKE THOSE NASTY AMERICAN CARS haha
like having a 2-1 engine..... UNLIKE THOSE NASTY AMERICAN CARS haha
02-08-2007, 12:09 AM
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02-08-2007, 11:05 AM
#25
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Originally Posted by etxxz
dissapointment in the acuraziners ...This thread belongs in a mustang forum
02-08-2007, 11:28 AM
#26
To me the engagement seems somewhat subtle. Then again I have a stock TL-S. Wait until you get in an ITR or a car with a Type-R motor.... VTEC engagement isn't just noticeable, its blatantly so. You WILL be pushed back into your seat.
02-08-2007, 11:48 AM
#27
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Originally Posted by I Go To Costco
To me the engagement seems somewhat subtle. Then again I have a stock TL-S. Wait until you get in an ITR or a car with a Type-R motor.... VTEC engagement isn't just noticeable, its blatantly so. You WILL be pushed back into your seat.
My Civic SI was more of a dr jeckyl and hyde but i like the TLs transformation more
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