hi i have a 92 accord with vtec head and chipped ecu that makes vtec kick in at 2.5 rpm is that bad or should i take the chip out

 

thats WAY too low....either reprogram or lose the chip

 

hmmm....2.5? what the hell is the point of having vtec kick in so low? def change that, quick.

 

well if you have a f22 then thats just about when it should kick in.

 

my vtak engages around there

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by urbanracer93 &raquo;</TD></TR><TR><TD CLASS="quote">well if you have a f22 then thats just about when it should kick in.</TD></TR></TABLE>

i hope your not talking about stock, regardless that is way too low, you will be in vtec durrin every shift, your gas mil. will be **** and you will burn mass oil. why not bump it up to 3.8 like i have so you use the torque at 2.5 instead of vteck wich is pointless at that low of an rpm. anyway stock vtec is around 4.2 - 4.5 on a f22

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by urbanracer93 &raquo;</TD></TR><TR><TD CLASS="quote">well if you have a f22 then thats just about when it should kick in.</TD></TR></TABLE>
Your right vtec kicks in right around there. It is variable depending on throttle position.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Wylie15 &raquo;</TD></TR><TR><TD CLASS="quote">i hope your not talking about stock, regardless that is way too low, you will be in vtec durrin every shift, your gas mil. will be **** and you will burn mass oil. why not bump it up to 3.8 like i have so you use the torque at 2.5 instead of vteck wich is pointless at that low of an rpm. anyway stock vtec is around 4.2 - 4.5 on a f22</TD></TR></TABLE>
Actually you are wrong on a f22 it doesnt kick in anywere near 4.5. Maybe you confused it with your gsr or something.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Wylie15 &raquo;</TD></TR><TR><TD CLASS="quote">

i hope your not talking about stock, regardless that is way too low, you will be in vtec durrin every shift, your gas mil. will be **** and you will burn mass oil. why not bump it up to 3.8 like i have so you use the torque at 2.5 instead of vteck wich is pointless at that low of an rpm. anyway stock vtec is around 4.2 - 4.5 on a f22</TD></TR></TABLE>

negative... on an f22b1 as in my car vtec engages as early as like 2400 and as late as like 3200. it is not a defined constant point in our setups.

 

you guys dont understand.....vtec on SOHC is VARIABLE ENGAGMENT.....

i can kick mine in @ &lt; 2k.......i can also take it to 6k w/o vtec........its all about throttle positioning........

a fixed engagment point of 2.5k is WAAAY too low

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fw190bvi &raquo;</TD></TR><TR><TD CLASS="quote">you guys dont understand VARIABLE ENGAGMENT.....

</TD></TR></TABLE>well put
oh noes! variable?! what does that mean!? lol...looks like someone needs to do some research...my vtak is always on, i have a button on my steering wheel for it. i just put tape over it so it stays on. push button vtec ****, ive actually seen that on a rex. quite amusing

 

I have no problem understanding it... I just did not elaborate cause I get sick of explaining it when most people ignore it, seeing as how this is posted once a week.

Although neat to know you got to 6k w/o vtec... I was talking about in normal driving just observing the ecu outputs... I saw that rpm range engagement most common for my lead foot.

 

Here are the conditions for VTEC engagement straight from Honda:

Valve Timing Change Conditions
Engine Speed: 2,300 ~ 3,200 rpm (depending on manifold pressure)
Vehicle Speed: 6.2 mph (10 km/h) or faster
Engine Coolant Temperature: 50° F (10°C) or higher
Engine Load: Judged by intake manifold negative pressure