i just notice taht when my engine is cold the vtec doesn't kick it

i remember sombody was tellin me about this a month ago on a civic

have u guys notice it too? or does it kick in no matter what the temperature of the motor is

 

Engine should be at normal operating temperature before vtec is enabled.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Integra_Type-R &raquo;</TD></TR><TR><TD CLASS="quote">i just notice taht when my engine is cold the vtec doesn't kick it

i remember sombody was tellin me about this a month ago on a civic

have u guys notice it too? or does it kick in no matter what the temperature of the motor is</TD></TR></TABLE>


why would u hit vtec when engine is cold, early morning VTEC buzz aaye

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mugen Mike &raquo;</TD></TR><TR><TD CLASS="quote">Engine should be at normal operating temperature before vtec is enabled.</TD></TR></TABLE>

 

just to see for myself...and it is true loll i was Amazed

i thought it was just my car...thanks guys

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mugen Mike &raquo;</TD></TR><TR><TD CLASS="quote">Engine should be at normal operating temperature before vtec is enabled.</TD></TR></TABLE>

Or revved that high...

 

no vtec wont engage if the motor isn't up to a certain temp. Mine won't hardly drive at all if it gets too cold. I think that has alot to do with flywheel though.

 

why would you floor a car or take any car above 4k rpms before warming it up anywayz?

Come to michigan. you'll kill y0self! No VtacHk f0r 20mInz!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by integerkgsr &raquo;</TD></TR><TR><TD CLASS="quote">why would you floor a car or take any car above 4k rpms before warming it up anywayz?

</TD></TR></TABLE>

sometimes merging onto highways require rev's above 4k, and if your neer a highway your car isnt always warm.

Your engine is fine to go up to 5k when cold. Its not the rev's its the load.

-Eric

 

here in canada its gets so cold here vtec wont engage even after 20 mins of driving...

 

what if i get the Apexi Super VTEC Air Flow Converter with VTEC Controller thingie off ebay or a shop...would my vtec kick in even if the engine is cold?

 

you mean a VAFC.. Yes. Because it overrides the pressure switch

 

SWeeetttt....thanks

i heard u could engage the vtec at like 3k with the vafc

but wouldn't that mess up ur motor?

or should i build my motor first before engaging it at a low RPM?

thanks

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Integra_Type-R &raquo;</TD></TR><TR><TD CLASS="quote">SWeeetttt....thanks

i heard u could engage the vtec at like 3k with the vafc

but wouldn't that mess up ur motor?

or should i build my motor first before engaging it at a low RPM?

thanks</TD></TR></TABLE>


NOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO!



If you move the VTEC engagement on a stock motor, you will likely lose power. If you modify it (I/H/E, cams, cam gears, etc.) you might make more power by moving the VTEC point up or down. If it comes to that, get on a dyno to figure it out.

On just about all motors, you'll lose power by lowering the VTEC engagement to 3000 RPM.

And about overriding the VTEC pressure switch, be careful with that. Don't beat the hell out of your motor when it's cold. And make sure you have plenty of oil because it won't engage when you're low on oil either (not enough oil pressure).

Edit, p.s. I noticed the lack of VTEC when cold in the first 30 seconds of my test drive off of the dealer lot

 

ummm...

no comment

 

thanks for pointin it out Chris =]

cuzz i dont realy know much about honda's & acura's

because i was into DSM....i was inlove with my eclipse but i trew it away like a rock when i found my type-R =P

im a newbie but im learnin pretty quick

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Integra_Type-R &raquo;</TD></TR><TR><TD CLASS="quote">SWeeetttt....thanks

i heard u could engage the vtec at like 3k with the vafc

but wouldn't that mess up ur motor?

or should i build my motor first before engaging it at a low RPM?

thanks</TD></TR></TABLE>

Don't be a moron.

Leave your car alone.

And stop trying to engage VTEC when your engine is cold. You know, there IS a reason why Honda disabled VTEC until the engine is at normal operating temperature. Overriding their safety precautions for no gain at all is stupid.

 

what he ^^ said.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Integra_Type-R &raquo;</TD></TR><TR><TD CLASS="quote">thanks for pointin it out Chris =]

cuzz i dont realy know much about honda's & acura's

because i was into DSM....i was inlove with my eclipse but i trew it away like a rock when i found my type-R =P

im a newbie but im learnin pretty quick

</TD></TR></TABLE>

Let me elaborate a little bit too..

The way VTEC works (in a nutshell) is that you have 2 different sets of cams. One is a 'mild' cam that makes lots of torque (pun not intended) at lower RPM's. The bigger one flows better and has some overlap to get more power at high RPM's, but that cam sucks at low RPM.

That's just how cams work, no cam is ideal at both low and high RPM. That's why Honda invented VTEC, to have a "high RPM power" mode and a "idle/driveable/midrange torque" cam

The VTEC engagement point IDEALLY set where the low cam is losing power, and the high cam is gaining power, and the two virtual dyno charts for each cam would intersect. If you move the VTEC point down from there, the high cam would come on too early, and would be making less power than the low cam. If the engagement point is too high, the low cam runs out of breath where the high cam could be making more power.

Anyhow, good luck, search, learn, yadda yadda.

-Chris

 

Its because the motor isnt warm enough to create enough oil pressure. Done.