LX-VTEC?
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Joined: Dec 2006
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From: miami, fl, US
LX-VTEC?
i have had my 07 LX coupe for about 5 months now and i always thought that only the Si had a VTEC and to my surprise so does the LX. I thought only the Si had VTEC for two reasons. one i only saw the VTEC logo on there engines and two, because i never heard of anyone talk about VTEC in a LX. well i decided to go to the honda website and to my surprise the LX has a VTEC. so i have had a VTEC in my little LX all along? 
. someone please verify
. someone please verify
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Re: LX-VTEC? (xxjoetheshowxx)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by xxjoetheshowxx »</TD></TR><TR><TD CLASS="quote">so the VTEC on FG1 does absolutely nothing towards performance 
</TD></TR></TABLE>
Pretty much.
</TD></TR></TABLE>Pretty much.
Joined: Mar 2007
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From: Long Beach, CA, USA
Re: (spammy123)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by spammy123 »</TD></TR><TR><TD CLASS="quote">once the vtec activates in an fg1 it still gives u that little extra power with the valve timing. notjing like the si tho.</TD></TR></TABLE>
Wrong. The VTEC on the R18 is not your traditional VTEC that everyone is used to. Basically we drive a 1.8L engine made for "performance" and VTEC switches it over to fuel economy mode.
Read this: (from hondanews.com)
Civic: i-VTEC Valve Control System
To achieve more performance and more fuel economy, the Civic's 1.8-liter i-VTEC engine uses an innovative and new valve control timing to minimize pumping losses during cruising and low engine load situations, an important factor in creating more efficient engines. Pumping losses are lowered when the variable valve timing allows an intake valve to remain open for a brief time period as the piston begins its compression stroke. By keeping an intake valve open during part of the compression stroke, some of the volume of unburned air/fuel mixture in the cylinder moves back inside the intake manifold and lowers the volume being compressed, or "pumped."
The pumping loss reduction yields enhanced fuel economy similar to an engine with a smaller displacement (the equivalent of a 1.5-liter engine) during cruising.
During cruising or other stable, low-load driving conditions, the new engine utilizes a dedicated set of cams to close one of the intake valves and retard that valve's timing, exerting backpressure on the air-fuel mixture.
This reduces the actual intake air volume. Meanwhile, the throttle is opened wider to provide optimum control over engine output. Opening the throttle valve, in other words, widening the path that the air flows through - reduces pumping losses to result in a significant improvement in engine efficiency.
During high load situations, the VTEC system provides high output valve timing for maximum power. Gone is the normal valve timing, replaced by two fundamentally greater extremes. A dual-stage air intake, a lightweight powertrain and optimized gearing further add to the performance character of the vehicle.
Whereas traditional VTEC operation changes valve opening duration based on higher oil pressure during high rpm operation at one side of the valvetrain's rocker arms, the Civic's i-VTEC system can switch valve timing duration at low rpm and low oil pressure using two hydraulic actuators on both sides of the intake rocker arm. This engagement method is similar to that used on the Civic Hybrid, Accord Hybrid and Odyssey i-VTEC systems.
This Civic's i-VTEC valve timing reacts to driving conditions related to throttle opening, vehicle speed, engine rpm and gear selection. A sophisticated drive-by-wire throttle control, air flow meter and dual-stage air intake allow the Engine Control Unit (ECU) to create seamless transitions between the two modes of engine operation.
Yeah... I know how you feel I too drive an 07 LX Civic
Wrong. The VTEC on the R18 is not your traditional VTEC that everyone is used to. Basically we drive a 1.8L engine made for "performance" and VTEC switches it over to fuel economy mode.
Read this: (from hondanews.com)
Civic: i-VTEC Valve Control System
To achieve more performance and more fuel economy, the Civic's 1.8-liter i-VTEC engine uses an innovative and new valve control timing to minimize pumping losses during cruising and low engine load situations, an important factor in creating more efficient engines. Pumping losses are lowered when the variable valve timing allows an intake valve to remain open for a brief time period as the piston begins its compression stroke. By keeping an intake valve open during part of the compression stroke, some of the volume of unburned air/fuel mixture in the cylinder moves back inside the intake manifold and lowers the volume being compressed, or "pumped."
The pumping loss reduction yields enhanced fuel economy similar to an engine with a smaller displacement (the equivalent of a 1.5-liter engine) during cruising.
During cruising or other stable, low-load driving conditions, the new engine utilizes a dedicated set of cams to close one of the intake valves and retard that valve's timing, exerting backpressure on the air-fuel mixture.
This reduces the actual intake air volume. Meanwhile, the throttle is opened wider to provide optimum control over engine output. Opening the throttle valve, in other words, widening the path that the air flows through - reduces pumping losses to result in a significant improvement in engine efficiency.
During high load situations, the VTEC system provides high output valve timing for maximum power. Gone is the normal valve timing, replaced by two fundamentally greater extremes. A dual-stage air intake, a lightweight powertrain and optimized gearing further add to the performance character of the vehicle.
Whereas traditional VTEC operation changes valve opening duration based on higher oil pressure during high rpm operation at one side of the valvetrain's rocker arms, the Civic's i-VTEC system can switch valve timing duration at low rpm and low oil pressure using two hydraulic actuators on both sides of the intake rocker arm. This engagement method is similar to that used on the Civic Hybrid, Accord Hybrid and Odyssey i-VTEC systems.
This Civic's i-VTEC valve timing reacts to driving conditions related to throttle opening, vehicle speed, engine rpm and gear selection. A sophisticated drive-by-wire throttle control, air flow meter and dual-stage air intake allow the Engine Control Unit (ECU) to create seamless transitions between the two modes of engine operation.
Yeah... I know how you feel I too drive an 07 LX Civic
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From: Slapping criminals, New York
Re: (Andrei'sCivic)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Andrei’sCivic »</TD></TR><TR><TD CLASS="quote">
Wrong. The VTEC on the R18 is not your traditional VTEC that everyone is used to. Basically we drive a 1.8L engine made for "performance" and VTEC switches it over to fuel economy mode.
.........This reduces the actual intake air volume. Meanwhile, the throttle is opened wider to provide optimum control over engine output. Opening the throttle valve, in other words, widening the path that the air flows through - reduces pumping losses to result in a significant improvement in engine efficiency.
During high load situations, the VTEC system provides high output valve timing for maximum power.
</TD></TR></TABLE>
He was right you, are wrong. It does not switch into economy mode when vtec engages.
Nothing about the phrase " maximum power " means economy.
Wrong. The VTEC on the R18 is not your traditional VTEC that everyone is used to. Basically we drive a 1.8L engine made for "performance" and VTEC switches it over to fuel economy mode.
.........This reduces the actual intake air volume. Meanwhile, the throttle is opened wider to provide optimum control over engine output. Opening the throttle valve, in other words, widening the path that the air flows through - reduces pumping losses to result in a significant improvement in engine efficiency.
During high load situations, the VTEC system provides high output valve timing for maximum power.
</TD></TR></TABLE>
He was right you, are wrong. It does not switch into economy mode when vtec engages.
Nothing about the phrase " maximum power " means economy.
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Joined: Oct 2006
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From: Kirkland, WA, USA
Re: (cnyej1)
Ugggg we have to ban these comment threads... I am trying to make peace with the fact that I have a R18, not the SI... this never helps. DOHC, V-TEC without the I... I just have to repeat the mantra, "i like no spoiler + better grill, I like no spoiler..." 
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From: 714, CA, USA
there's many variations to VTEC, if you guys have knowledge of older motors from the D and B series you see VTEC for economy (Civic HX) over to basic power increase VTEC (D16Z6) then over to standard known VTEC in the B16A and B18C1, etc.
VTEC is just valve timing increase, it's not a turbo or anything, I don't see the big deal with it existing in any engine - R18 with VTEC or not, it won't be anywhere close to an Si in power... That's why people who bought the Si bought it and not any other trim.
VTEC is just valve timing increase, it's not a turbo or anything, I don't see the big deal with it existing in any engine - R18 with VTEC or not, it won't be anywhere close to an Si in power... That's why people who bought the Si bought it and not any other trim.
Joined: Aug 2006
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From: Bethesda, MD, US
dont feel too bad, the FG1, in base model (stock) comparisson. Is still the fastest baseline civic out right now. "yeha yeah i know. if i wanted performance i should've bought an Si." im not gonna say nothing more peace!
Joined: Sep 2006
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From: ct, usa
Re: (elklodgeezra)
The big difference's between the 1.8L and the 2.0L motor is that the 2.0L has bigger displacement and DOHC where as the 1.8L has SOHC. The 1.8L VTEC operates the same as the 2.0L, it has the same purpose in mind (to change the valve timing). The 1.8L is not a performance car that switches to econo car when you stomp on it, or any of that stupid **** that was mentioned above.
The fact is that yes it is a VTEC, so all you little kids that just realized that you have a VTEC in your moms car go ahead and pee your pants in delight; BUT remember this the 2.0L has more displacement AND two cams over the 1.8L's one cam, so of course its going to be more of a performance motor.
Marshall
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From: hoffman estates, illinois, usa
Re: (marshall81)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by marshall81 »</TD></TR><TR><TD CLASS="quote">
The big difference's between the 1.8L and the 2.0L motor is that the 2.0L has bigger displacement and DOHC where as the 1.8L has SOHC. The 1.8L VTEC operates the same as the 2.0L, it has the same purpose in mind (to change the valve timing). The 1.8L is not a performance car that switches to econo car when you stomp on it, or any of that stupid **** that was mentioned above.
The fact is that yes it is a VTEC, so all you little kids that just realized that you have a VTEC in your moms car go ahead and pee your pants in delight; BUT remember this the 2.0L has more displacement AND two cams over the 1.8L's one cam, so of course its going to be more of a performance motor.
Marshall</TD></TR></TABLE>
That and the shape of the sleeves on the block, oval instead of circular.....
The big difference's between the 1.8L and the 2.0L motor is that the 2.0L has bigger displacement and DOHC where as the 1.8L has SOHC. The 1.8L VTEC operates the same as the 2.0L, it has the same purpose in mind (to change the valve timing). The 1.8L is not a performance car that switches to econo car when you stomp on it, or any of that stupid **** that was mentioned above.
The fact is that yes it is a VTEC, so all you little kids that just realized that you have a VTEC in your moms car go ahead and pee your pants in delight; BUT remember this the 2.0L has more displacement AND two cams over the 1.8L's one cam, so of course its going to be more of a performance motor.
Marshall</TD></TR></TABLE>
That and the shape of the sleeves on the block, oval instead of circular.....
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From: Long Beach, CA, USA
Re: (marshall81)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by marshall81 »</TD></TR><TR><TD CLASS="quote">
The 1.8L is not a performance car that switches to econo car when you stomp on it, or any of that stupid **** that was mentioned above.
Marshall</TD></TR></TABLE>
HaHa. C'mon give us some credit, no one is saying that VTEC switches it over to fuel economy mode when you floor it.
The 1.8L is not a performance car that switches to econo car when you stomp on it, or any of that stupid **** that was mentioned above.
Marshall</TD></TR></TABLE>
HaHa. C'mon give us some credit, no one is saying that VTEC switches it over to fuel economy mode when you floor it.
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From: Slapping criminals, New York
Re: (Andrei'sCivic)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Andrei’sCivic »</TD></TR><TR><TD CLASS="quote">
HaHa. C'mon give us some credit, no one is saying that VTEC switches it over to fuel economy mode when you floor it.</TD></TR></TABLE>
Really?? Because this is what you said:
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Andrei’sCivic »</TD></TR><TR><TD CLASS="quote">Wrong. The VTEC on the R18 is not your traditional VTEC that everyone is used to. Basically we drive a 1.8L engine made for "performance" and VTEC switches it over to fuel economy mode. </TD></TR></TABLE>
Seems to be a pretty cut and dry case here. You said it did, and now you say you didnt.
HaHa. C'mon give us some credit, no one is saying that VTEC switches it over to fuel economy mode when you floor it.</TD></TR></TABLE>
Really?? Because this is what you said:
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Andrei’sCivic »</TD></TR><TR><TD CLASS="quote">Wrong. The VTEC on the R18 is not your traditional VTEC that everyone is used to. Basically we drive a 1.8L engine made for "performance" and VTEC switches it over to fuel economy mode. </TD></TR></TABLE>
Seems to be a pretty cut and dry case here. You said it did, and now you say you didnt.
Joined: Mar 2007
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From: Long Beach, CA, USA
Re: (cnyej1)
Ok, so it actually adjust timing a bit.
During high load situations, the VTEC system provides high output valve timing for maximum power. Gone is the normal valve timing, replaced by two fundamentally greater extremes. A dual-stage air intake, a lightweight powertrain and optimized gearing further add to the performance character of the vehicle.
Whereas traditional VTEC operation changes valve opening duration based on higher oil pressure during high rpm operation at one side of the valvetrain's rocker arms, the Civic's i-VTEC system can switch valve timing duration at low rpm and low oil pressure using two hydraulic actuators on both sides of the intake rocker arm. This engagement method is similar to that used on the Civic Hybrid, Accord Hybrid and Odyssey i-VTEC systems
- Most apparent is the i-VTEC "intelligent" valve-control system, a technology that combines VTC (Variable Timing Control) - which continuously adjusts camshaft phase-with Variable Valve Timing and Lift Electronic Control (VTEC) - which changes valve lift, timing, and duration. Combining these two systems results in impressive horsepower and high torque with good fuel economy and low exhaust emissions
I just wanted to stress that there is a difference between the VTEC systems. K20 and R18.
Here this is said about the Si: "a high-performance version of the i-VTEC system " -hondanews.com
The Si has a 3 stage VTEC system, it can actually adjust valve timing and duration on the exhaust side.
During high load situations, the VTEC system provides high output valve timing for maximum power. Gone is the normal valve timing, replaced by two fundamentally greater extremes. A dual-stage air intake, a lightweight powertrain and optimized gearing further add to the performance character of the vehicle.
Whereas traditional VTEC operation changes valve opening duration based on higher oil pressure during high rpm operation at one side of the valvetrain's rocker arms, the Civic's i-VTEC system can switch valve timing duration at low rpm and low oil pressure using two hydraulic actuators on both sides of the intake rocker arm. This engagement method is similar to that used on the Civic Hybrid, Accord Hybrid and Odyssey i-VTEC systems
- Most apparent is the i-VTEC "intelligent" valve-control system, a technology that combines VTC (Variable Timing Control) - which continuously adjusts camshaft phase-with Variable Valve Timing and Lift Electronic Control (VTEC) - which changes valve lift, timing, and duration. Combining these two systems results in impressive horsepower and high torque with good fuel economy and low exhaust emissions
I just wanted to stress that there is a difference between the VTEC systems. K20 and R18.
Here this is said about the Si: "a high-performance version of the i-VTEC system " -hondanews.com
The Si has a 3 stage VTEC system, it can actually adjust valve timing and duration on the exhaust side.
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From: Slapping criminals, New York
Re: (Andrei'sCivic)
I know how vtec itself works etc and see what your saying. Im just stating that you said one thing and then said you didnt . Either way, what you said before was not true and I was the one who happened to point it out.
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The R18 vtec IS the economy mode. With light throttle and crusing the ECU engages the R18 vtec (between 1000-3000rpm) and the result is a 1.5l fuel economy mode. At this time, when you stomp on the gas, the vtec disengages and falls back on the low "high performance" cam. Its essentially a backwards vtec... BUT if you floor the R18 from a stop, and keep your foot on the petal, vtec will not engage, because the conditions are not right "light throttle and crusing". And you will be riding the low "high performance" cam the entire way.
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From: Longmeadow, Ma, USA
Re: (Andrei'sCivic)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Andrei’sCivic »</TD></TR><TR><TD CLASS="quote">F*ck all this VTEC talk. My fuel economy still sucks, when I cruise.
Stock: 27mpg with some highway.
With 225/40/18 tires & oem Si axleback: 25mpg.</TD></TR></TABLE>
dude you got something wrong if you are driving an LX. are you driving on the highway in 4th gear?? about 26-29 dollars when i fill up in my Si, thats abouts 10.5 to 11.5 gallons each time. lets just call it 11. depending on if i tool around on ricers in the area, i get abouts 290 miles on that 11 gallons. thats a little over 26mpg, and this is a lot of town driving, more than half of it anyways. if you are being serious, then LX FTL
Stock: 27mpg with some highway.
With 225/40/18 tires & oem Si axleback: 25mpg.</TD></TR></TABLE>
dude you got something wrong if you are driving an LX. are you driving on the highway in 4th gear?? about 26-29 dollars when i fill up in my Si, thats abouts 10.5 to 11.5 gallons each time. lets just call it 11. depending on if i tool around on ricers in the area, i get abouts 290 miles on that 11 gallons. thats a little over 26mpg, and this is a lot of town driving, more than half of it anyways. if you are being serious, then LX FTL
NO MERCY!
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From: San Antonio, TX, U.S.
Re: (bbRedSi)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Andrei’sCivic »</TD></TR><TR><TD CLASS="quote">
Wrong. The VTEC on the R18 is not your traditional VTEC that everyone is used to. Basically we drive a 1.8L engine made for "performance" and VTEC switches it over to fuel economy mode.
</TD></TR></TABLE>
That can't be right. If that were the case then we'd all be cruising in VTEC just to save fuel. The economy occurs below the VTEC switchpoint. And the 1.8L engine is not made for "performance". That part is left exclusively for the Si.
Wrong. The VTEC on the R18 is not your traditional VTEC that everyone is used to. Basically we drive a 1.8L engine made for "performance" and VTEC switches it over to fuel economy mode.
</TD></TR></TABLE>
That can't be right. If that were the case then we'd all be cruising in VTEC just to save fuel. The economy occurs below the VTEC switchpoint. And the 1.8L engine is not made for "performance". That part is left exclusively for the Si.
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From: hoffman estates, illinois, usa
Re: (DarkFlareon)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DarkFlareon »</TD></TR><TR><TD CLASS="quote">The R18 vtec IS the economy mode. With light throttle and crusing the ECU engages the R18 vtec (between 1000-3000rpm) and the result is a 1.5l fuel economy mode. At this time, when you stomp on the gas, the vtec disengages and falls back on the low "high performance" cam. Its essentially a backwards vtec... BUT if you floor the R18 from a stop, and keep your foot on the petal, vtec will not engage, because the conditions are not right "light throttle and crusing". And you will be riding the low "high performance" cam the entire way. </TD></TR></TABLE>
You should do research before you open your thought process and share random crap that spews out again.
It has 3 different levels of vtec. It's not just fuel economy.....
....Where do you come up with these things?
You should do research before you open your thought process and share random crap that spews out again.
It has 3 different levels of vtec. It's not just fuel economy.....
....Where do you come up with these things?
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From: atlanta, ga, usa
Re: (elklodgeezra)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by elklodgeezra »</TD></TR><TR><TD CLASS="quote">
That and the shape of the sleeves on the block, oval instead of circular.....</TD></TR></TABLE>
Oval aluminum sleeves cast in the block with iron pressed in the middle.. can't handle too much boost by design.. There goes that "slap a turbo on and keep up with the Si guys" everybody seems to have around here.
That and the shape of the sleeves on the block, oval instead of circular.....
</TD></TR></TABLE>Oval aluminum sleeves cast in the block with iron pressed in the middle.. can't handle too much boost by design.. There goes that "slap a turbo on and keep up with the Si guys" everybody seems to have around here.