this is not a noob question! well i guess it KINDA is. from the activation on the VTEC solenoid to the rockers. I can't understand how the dowel in the rockers locks it into VTEC. I see a little oil passage that goes into the spring loaded rocker(idle rocker?) and then there is a floating dowel. i dont what the dowel is doing. i notice a little oil squirter on the (VTEC rocker?). what the hell is going on in there?

 

http://www.youtube.com/watch?v...arch=


go there

 

Honestly that didn't really answer his question.

 

well, I figured it out. not from the video but from looking at the rockers again. so the oil comes in through the rocker shaft into the idle rocker. the hydraulic pressure pushes that piston out which in turn pushes the floating piston which pushes in the spring loaded piston lock into VTEC.

but at idle isnt there a difference in valve lift? the two outer lobes have different lift. how is that compensated for?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bluedlude &raquo;</TD></TR><TR><TD CLASS="quote">well, I figured it out. not from the video but from looking at the rockers again. so the oil comes in through the rocker shaft into the idle rocker. the hydraulic pressure pushes that piston out which in turn pushes the floating piston which pushes in the spring loaded piston lock into VTEC.

but at idle isnt there a difference in valve lift? the two outer lobes have different lift. how is that compensated for?</TD></TR></TABLE>

what do you mean? thats what vtec is all about... dual cam profiles

 

what do you mean how is that compensated for?? the cam lobes push the rockers just like in any other car....

 

so do you not understand what im saying? when the Vtec isnt locked into place, the outer two rockers are riding the outer two cam profiles. well if the profiles are different(which they are) wont it make more lift on one compared to the other?

 

the outer two profiles are the same (low lift)

vtec is the middle rocker.

 

so you are telling me that the two outer lobes are the same?



and I just took this pic of my H22 cams.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bluedlude &raquo;</TD></TR><TR><TD CLASS="quote">so you are telling me that the two outer lobes are the same?


and I just took this pic of my H22 cams.</TD></TR></TABLE>

no they are not the same..

primary and secondary lobes are different height to allows one valve to open more than the other to promote swirl and have a better / cleaner combust out of vtec..

middle lobe is vtec lobe for HUGE and equal valve lift

 

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

no they are not the same..

primary and secondary lobes are different height to allows one valve to open more than the other to promote swirl and have a better / cleaner combust out of vtec..

middle lobe is vtec lobe for HUGE and equal valve lift</TD></TR></TABLE>

thank you so much!!

 

There are different types of vtec, and they way they "exactly" work is a little different depending... Check this out:

http://www.leecao.com/honda/vtec/index.html

 

well I was mainly talking about the H22 vtec.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bluedlude &raquo;</TD></TR><TR><TD CLASS="quote">so do you not understand what im saying? when the Vtec isnt locked into place, the outer two rockers are riding the outer two cam profiles. well if the profiles are different(which they are) wont it make more lift on one compared to the other?</TD></TR></TABLE>

yes it does, this is the same concept of primary and secondary camshaft lobes that has been running 4 valve motors forever....

theyre not the same profile at all, but that doesn't have anything to do with vtec....

 

vtec is for noobs.. real power is made by big Turbos

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bb4ever &raquo;</TD></TR><TR><TD CLASS="quote">

yes it does, this is the same concept of primary and secondary camshaft lobes that has been running 4 valve motors forever....

theyre not the same profile at all, but that doesn't have anything to do with vtec....</TD></TR></TABLE>

yeah, i already got it from

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

no they are not the same..

primary and secondary lobes are different height to allows one valve to open more than the other to promote swirl and have a better / cleaner combust out of vtec..

middle lobe is vtec lobe for HUGE and equal valve lift</TD></TR></TABLE>

thanks for the help everyone

 

damn, I never even noticed that. I just grabbed a cam and its pretty obvious.


does the whole swirl thing only apply to the lower rpm range? I'm guessing once in the upper rpm's hit it would have less of an effect?

 

my vtec goes wheee wheeee WHEEEEEEEEEEEEEEE!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AnthonyG2003 &raquo;</TD></TR><TR><TD CLASS="quote">my vtec goes wheee wheeee WHEEEEEEEEEEEEEEE!</TD></TR></TABLE>