roundworldsobig

i'm sure this has been ran through and whatnot but i looked thru FAQ and searched vtec ivtec difference and ivtec difference and i couldn't find anything so can anyone lead me to a thread that already ran through this or give me a quick run through of what the differences are?

StupidSlowRSX

VTEC is stupid


i-VTEC is intelligent.


Basicially..

VTEC - Valve Timing(and Lift ) Electronically controlled.

I-vtec is the same thing, but with VTC.

Also known as Variable Cam phasing.


I don't know why im going to sit here and actually type this out, but luckily I type pretty quick..


With a VTEC motor, at all times of acceleration 4 valves work per cylinder.

With an I-VTEC motor, Below VTEC both Exhaust valves work and only 1 intake valve opens. This causes more suction from the one intake valve being open which also causes all the air that gets sucked in to be sucked in with a spirial like motion. The gas is then distributed through the combustion chamber more evenly. Creating better low end torque gains. This one intake valve working motion is known as VTC or Variable Cam Phasing. When VTEC is crossed over to the other intake valve opens and all 4 valve work.


search more next time please.. Theres even videos that explain this stuff.

thebluedc5

the difference between VTEC and iVTEC is that VTEC dont have an i like iVTEC

BarracksSi

I've understood that the older VTEC just has the high-lift cam switchover, and the newer i-VTEC adds continuously variable cam phasing.

Plus, the cam changeover RPM can vary depending on throttle position and whatnot; I'm not sure if that's only on i-VTEC or if it was also on the older versions of VTEC too.

While the EP3's A3 motor doesn't have a high-lift cam for high RPM's (the 2200 rpm switch between 12 and 16 valves is for different reasons), it does advance/retard the cams' overlap as needed throughout the RPM range.

gmadsen100

vtec>ivtec

6SPD_EK

iTrader: (2)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gmadsen100 &raquo;</TD></TR><TR><TD CLASS="quote">vtec&gt;ivtec</TD></TR></TABLE>
huh

have another festivus is over buddy...sober up

HondaTom

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gmadsen100 &raquo;</TD></TR><TR><TD CLASS="quote">vtec&gt;ivtec</TD></TR></TABLE>
Please refrain from showing us how severe your retardation is.

artificeexks

"vtec &gt; ivtec"

what the hell, that's stupid?!

Declectic

iTrader: (2)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by artificeexks &raquo;</TD></TR><TR><TD CLASS="quote">"vtec &gt; ivtec"

what the hell, that's stupid?!</TD></TR></TABLE>

it's okay, he only has six post lol