Why is VTEC so good?
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Anyone can tell me why VTEC is so cool?
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because it's good...
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y is it so gd?
ezit bcoz it unlike other powerful car who use supercharged or turbo in order to hv high performance but vtec dun..?
can anyone tell me hw vtec work?
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What is VTEC?
VTEC stands for Variable Timing and Lift Electronic Control System. It was designed to resolve once and for all the usual compromise engine designers have traditionally been forced to make between low-speed torque and high-end horsepower. It lets the engine breathe according to its needs.
Engine breathing is analogous to the breathing of any living organism. At rest, the lungs take in the necessary amount of air for normal function. When running, the lungs and heart work faster to supply more oxygen to the system. Engines can't do that because their breathing apparatus (comprised intake maifolds, intake runners, valves, valve lift and throttle bores) is fixed. Not so with VTEC.
Using an innovative arrangement of three intake and exhaust lobes per cylinder, VTEC increases both valve lift and valve opening duration as the engine climbs through the rpm band. By varying valve lift and timing, the engine can aspirate more air when it needs it at high speed operation. It boosts power without resorting to the complex and sometimes overstressed system of turbocharging or supercharging.It's an elegant and organic solution to a problem that has plagued engine designers for generations, and exemplifies the Acura approach to engineering. Simplicity, elegance and function.
How to tell when VTEC is kicking in?
Watch your oil pressure gauge as you rev up through 5800 RPM. The VTEC system consumes a significant amount of oil flow when it is activated, and you can watch your needle FALL a couple of notches as the revs climb through that point.
VTEC factoid-of-the-week: Valve timing change conditions that must be met include 5 km/h (3 mph) or faster and 60 degrees C (140 deg F) or faster.
The VTEC technology is employed in the following Acura Models:
Acura Integra GS-R
1.8 liter, 4-cylinder, 16-valve DOHC VTEC
Acura 3.0 CL
3.0 liter, 24-valve SOHC V6 VTEC
2.2 liter, 16-valve SOHC inline 4-cylinder VTEC
Acura NSX
Manual - 3.2 liter, DOHC 24-valve V6 VTEC
Automatic- 3.0 liter, DOHC 24-valve V6 VTEC -
MIVEC is better
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Talking about technology...........BMW's valvetronic is the best...........
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wow....then how do you differentiate between so many types of VTEC? got EXI, ESI, VTI, SIR and Type R. What's the difference? And what is so powerful about Type R??
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rotary
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what's the meaning of rotary??
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difference is each model have diferent stage of vtec and some are dohc / sohc engine.type R engine being the extreme of any NA engine in the world has 6 forward gears while the rest have 5 only.think u go search internet for more indepth answer.Originally posted by hellodoggy:wow....then how do you differentiate between so many types of VTEC? got EXI, ESI, VTI, SIR and Type R. What's the difference? And what is so powerful about Type R?? -
rotary —adj. acting by rotation (rotary drill). —n. (pl. -ies) 1 rotary machine. 2 (Rotary) (in full Rotary International) worldwide charitable society of businessmen, orig. entertaining in rotation. [medieval Latin: related to *rota]Originally posted by hellodoggy:what's the meaning of rotary??
hahaha -
chim anyone 1 2 explain to me in more simple summary?> lolx
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hi silver.i guess you can find all your answers about VTEC at http://www.leecao.com/honda/vtec/dohcvtec.htmlOriginally posted by Si|verGer:chim anyone 1 2 explain to me in more simple summary?> lolx
have a good time reading it.
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so Supa 4 has a vtec engine... wooooooo