ivtec or vtec
Joined: Jan 2004
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From: Ellicott City, MD
http://asia.vtec.net/article/k20a/
Basically, i-vtec would be more desirable, it adds another vtec point at lower rpm so if you really need to get moving you don't have to wait to get to 5600 for example, it'll kick in at 4800 instead at WOT.
Basically, i-vtec would be more desirable, it adds another vtec point at lower rpm so if you really need to get moving you don't have to wait to get to 5600 for example, it'll kick in at 4800 instead at WOT.
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From: Washington, DC, USA
Re: ivtec or vtec (ballerchild)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ballerchild »</TD></TR><TR><TD CLASS="quote">i-vtec>vtec because its smarter 
</TD></TR></TABLE>
Yup.
Adjusting the cam angle for every rev range, throttle input, and engine load through ECU programming is quite an improvement over using manually-adjustable cam gears.
</TD></TR></TABLE>Yup.
Adjusting the cam angle for every rev range, throttle input, and engine load through ECU programming is quite an improvement over using manually-adjustable cam gears.
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From: Washington, DC, USA
Re: (mrnewguy)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mrnewguy »</TD></TR><TR><TD CLASS="quote">so ivtec doesnt work unless u're at 5600 rpm? </TD></TR></TABLE>
Unless you reprogram it for another rev range.
To confuse you more, the K20A3 engine (base RSX and 02-05 Civic Si) "engages vtec" at about 2200 rpm. They run as a 12-valve motor below 2200, and open up the second exhaust valve above 2200.
Further...
Throughout the rev range, the cam overlap is constantly adjusted by the ECU, as I said before.
i-VTEC > old VTEC
Unless you reprogram it for another rev range.
To confuse you more, the K20A3 engine (base RSX and 02-05 Civic Si) "engages vtec" at about 2200 rpm. They run as a 12-valve motor below 2200, and open up the second exhaust valve above 2200.
Further...
Throughout the rev range, the cam overlap is constantly adjusted by the ECU, as I said before.
i-VTEC > old VTEC
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Joined: Nov 2003
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From: Cincinnati, OH
Re: (ilovemyb16a)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ilovemyb16a »</TD></TR><TR><TD CLASS="quote">ok what about the rsx type s wer does vtec pop on that</TD></TR></TABLE>
On the K20 engines there is no pop like you are thinking about, that went out the door with the B series. On top of that the K20A3 in the ep3 and the K20A2 in the DC5 are very different engines.
On the K20 engines there is no pop like you are thinking about, that went out the door with the B series. On top of that the K20A3 in the ep3 and the K20A2 in the DC5 are very different engines.
Joined: May 2006
Posts: 22
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From: EU
Re: ivtec or vtec (ilovemyb16a)
got ep3 civic type-r with dohc i-vtec (K20A2) and it has more power on lower rpm's than the DC2's and other vtec engines.
as ppl said before me, u got more power from the start, dont need to rev it like mad always.
although the limit is at arround 8300 and the vtec which jams u in the seats kicks in arround 6000
as ppl said before me, u got more power from the start, dont need to rev it like mad always.
although the limit is at arround 8300 and the vtec which jams u in the seats kicks in arround 6000
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TenLarge
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May 30, 2005 08:48 AM
