help understanding VTEC in the s2000
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From: Annapolis, MD
help understanding VTEC in the s2000
as everyone knows at 5850 or so the s2000 lunges forward with a noticable difference in power. the s2000 has VTEC.
my wifes '02 civic si has i-VTEC and there is no sudden burst of power albeit the car does seem more responsive in lower rpm's than my car.
my friend's '03 rsx-s has i-VTEC and there is a noticable increase in power at around 6000 like the s.
at first i thought it was the i (intelligent) VTEC that was the difference...maybe the cam's lift changes constantly rather than all of the sudden but the rsx-s with i-VTEC is throwing me for a loop.
also if someone could elaborate on the difference between the two it would be most appreciated.
my wifes '02 civic si has i-VTEC and there is no sudden burst of power albeit the car does seem more responsive in lower rpm's than my car.
my friend's '03 rsx-s has i-VTEC and there is a noticable increase in power at around 6000 like the s.
at first i thought it was the i (intelligent) VTEC that was the difference...maybe the cam's lift changes constantly rather than all of the sudden but the rsx-s with i-VTEC is throwing me for a loop.
also if someone could elaborate on the difference between the two it would be most appreciated.
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From: NJ
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The 02 civic Si's k20 and the rsx-s's k20 cannot be compared in terms of performance. The Si's i-vtec wasn't agressively designed to make power, but more of a fuel saver. Same goes for rsx base, accord's i-vtec, crv, element and so on. They all utilize I-vtec, but not in the same way as Rsx-s and the New Si. VTC however on all Ivtec equipped cars do a fantastic job of making gobs of torque at low range powerband.
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From: 951 Moreno valley,CA
the main difference between your wifes civic si and your friends type-s is that the K20A2 found in the rsx has vtec on both the intake and exhaust cams, while the civic has it on the intake cam only. the s2000 engine has it on both the intake and exhaust cams as well but doesnt vary INTAKE valve timing constantly as on i-vtec engines. i think if honda added i-vtec they could further inprove torque on the car considerable in the lower rpms.
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From: Clearwater
Originally Posted by Silver9k,May 6 2006, 07:29 AM
power....
revs
revs
They don't need vtec because they are cammed for high rpm power, since they're never going to to below a certain rpm range when racing
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From: Annapolis, MD
Originally Posted by Tsa1,May 5 2006, 06:48 PM
the main difference between your wifes civic si and your friends type-s is that the K20A2 found in the rsx has vtec on both the intake and exhaust cams, while the civic has it on the intake cam only. the s2000 engine has it on both the intake and exhaust cams as well but doesnt vary INTAKE valve timing constantly as on i-vtec engines. i think if honda added i-vtec they could further inprove torque on the car considerable in the lower rpms.
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From: Gainesville, FL
WTF!! This is taken from the website listed above...
Who the hell complains about the 9,000 redline?
Driving a vehicle with VTEC often requires significant additional driver input to operate at very high power outputs. In particular, the Honda S2000 has received complaints from both owners and detractors due to its very high (9,000 rpm) redline in the early models. While the engine produces very high output (120hp per litre), some see the continual need to "row the gears" as a distraction from driving. For contrast, another approach at making high power output is to increase the displacement of a given engine (the 7 litre LS7 motor being an extreme example). Increasing displacement generally harms engine efficiency, but dramatically improves engine output.
Who the hell complains about the 9,000 redline?