Tugz_S2K

Dude, dont post if you dont know. VTEC does not always engage at 6000rpm. At part/light throttle VTEC may not engage. VTEC engagement can be 6000rpm +/-500 rpm depending on conditions.

VTEC engages depending on the following:

1. Throttle Position
2. Oil Pressure
3. Coolant Temperature
4. Transmission Speed Sensor Signal
5. Crankshaft Speed

All of these readings go back to the ECU. The ECU then decides on the optimal VTEC activation point.

Basic Principals can be read here
http://asia.vtec.net/spfeature/vtecimpl/vtec1.html

Lionheart

Sorry for trying to answer a question thinking I new the answer dude. In everything I read up until now it was stated that VTEC... Well, you know what.

John_Z

Looks like your options would be to a) use something like vafc and raise the vtec engagement b) get 4.57s or c) don't drive so fast

mad-dog-one

This is a little of track, but ... it vtec in my 05 S (~2k miles) seems to kick-in a little above 6K RPM, maybe as high as 6.2K RPM before I feel the effect. Does my vtec engage late, does it engage before I feel the effect, is the tachometer sufficiently valid to know the determine the actual RPM, should I be looking at the road instead of the tach with WOT, am I worrying about nonsense and need to get a life, does anybody care, will Michael Jackson do time, ... . Thank you in advance for the answers to these and other earth-shattering questions.

StinkyTofu

AusS2000 and Tugz_S2k: Thanks, thats what i was thinking but i just wanted someone else to confirm that since i was not sure .

Lionheart: Its ok, don't be to hard on yourself. The fact that i had to ask this shows how little i know .

John_Z: Or how about: D) Get a supercharger so i don't have to get the gears to pretend i'm fast

Lionheart

Thanks for the support, StinkyTofu, now it hurts a little less I really thought I new the answer to the question and was glad to be able to finally answer a question, but as we can see, the die-hards on this forum who turned their S'ses inside out keep surprising us and do know a whole lot more on the cars! But they're right, when we're wrong they have all the right to tell us so! That's the way we learn Coming from other convertibles and having turned them inside out and having developed an own forced induction system and helping the people on those forums, I know how it must feel to see a freshman answer... wrong I'm learning

96_LXR

The VTEC is still engaged above 6k. At a light throttle opening you wouldn't hear it much though.

As long as the oil is warm, and the wheels are rolling you will cross over at the normal RPM's.

I wouldn't want to run at those RPM's for extended periods, JMO

ronblanford

Is there any reason to fear cruising in vtec? I can't imagine why there should be any concern about using a different cam profile.

StinkyTofu

Theres no real fear for cruising in vtec but my reasons for not wanting to cruise in vtec are quite simple:

1) Better fuel efficiency
2) Less wear on the valvetrain

Wisconsin S2k

hey at least you were open to listening to what others had to say and show you are willing to continue learning.