my search didnt turn anything up off the bat so im sorry if its been answered somewhere and i didnt find it.

basically, i just read that you can turn vtec on, what is vtec, what advantages, ect, and how do you turn it on?

(sorry, just getting a tl so im new to all this)

 

http://letmegooglethatforyou.com/?q=vtec

 

it says what it is, but im not a mechanically literate person. can you just give me a quick summary? does it save gas, does it make you go faster,?

 

Neither am I. It just kicks in once you go over some RPM threshold; probably around 4k. My interpretation of VTEC is just the sound the engine makes but I know there's more to it.

 

:r ofl:
BEST SITE EVAR!

Ok heres the short of it. Vtec is variable valve timing and lift control. What does that mean? In a nutshell on our tl's it means that a below a certain rpm level ~4000 rpms on TL-P and 5000 rpms on a TL-S the intake valves dont open as much and less air into the pistons. This helps swirl and air comming in and allows it to mix with the fuel better for more efficient combustion. Once the rpms climb past the threshold level the valves open up fully allowing the maximum amount of air in leading to me horsies kickin around inside that bad ass honda motor of yours. This is a very laymen explanation so I dont wana hear any trolling about how its really only one valve that opens up not both etc...

You can think of this as Honda stuffed two engines into your tl. One from a civic and one from a Ferrari. The only way to get to ferrari engine is to let the RPMS climb up past the designated level.

http://en.wikipedia.org/wiki/VTEC theres some good info. Honda isn't the only company that offers this they all do at this point under some form on another (vvti, valve tronic.... blah blah)

Also welcome to forums, and search before asking because they're all gonna laugh at you.

 

I don't know if this is exactly how VTEC works in our cars, but this shows the general concept:

http://www.youtube.com/watch?v=AcT_ZyY3F0k

 

Have any of you heard a BIG V8 that when idling is real lumpy and not smooth? Thats usually due to a big cam. What Vtec gives us is basically that. It gives us 2 cams in 1. A economy cam for normal driving then the "big race" cam. If vtec were to be stuck on from idle it would idle rough and lumpy (like video below). Since its original inception vtec has gotten much more advanced and has gotten continuously variable and is on both intake and exhaust

http://www.youtube.com/watch?v=dHVCyj4GqPo

 

the swirl actually occurs when vtec is on-working- it delays the 2nd intake valve opening a milisecond and creates a tornado into the cylinder for max combustion

An On Switch?- yes- located under your right foot- the skinny pedal
Push it hard -vtec on at 4700 rpm (01 TL-P) and the gas guage reacts like it has a V8!!
Good for getting on the freeway ahead of a semi, not good for gas economy
Stay under 4000 rom and save fuel

Here is the acura owner book link- click your year then model--its free from acura
Will answer 90% of your questions about the car- TCS, ABS, all important things to know and understand
https://techinfo.honda.com/rjanisis/...01_OMANUAL.asp

 

Thats sick. I wish people made cams for the J.

 

No offense to anyone, but on a 4-cyl, at idle, that just sounds :ghey: .

On 450+ HP V8, it'd be sex though.





BTW - that Honda Marine vid is great. I think that is pretty much exactly how VTEC works on the 2G and 3G TL.

 

haha the stuff ppl come up with! gotta remember this one

 

I agree, just giving an example. Thats basically what vtec is but with a smooth idle.

 

And make it un-drivable for average street use

 

YEAHHH, VTEC Killer cams, basically it's VTEC all the time on that VID. Here is a nice vid of the VTEC Crossover.
20-21 seconds into the vid

 

Here it is on a TL Type S (a-spec Canada only)

15 seconds into vid, then at 49

 

undriveable because of gas mileage or b/c it would harm the engine?

 

As in it would be hard as hell to drive the car

 

i guess the gas would be a tad touchy. but with an automatic i think somebody could manage.

not that all that engine work + Auto makes sense

 

It makes it undriveable for a daily driver for many reasons. Just the simple fact that it doesnt want to idle is the big thing. Much worse mileage, harder to start in cold weather, more stress on the auto, It would be far easier with a stick. Not to mention you loose all low end power.

 

http://www.youtube.com/watch?v=dHVCyj4GqPo

that is what B series with high lift cams, and no-vtec sounds like...Toda makes a Vtec killer setup (removes Vtec)...which is whats in the video, any NA engine with 13:1+ compression, high lift race cam's, and an open header will sound that way.

i always wanted vtec killer's, but they are $$.

if vtec was always on, you would not notice a difference in sound. basically, a oil pressure actuated solenoid opens at a certain rpm, and oil pressure(controlled by the ecu)...when that solenoid locks, it locks a 3rd set of rocker arms for a 3rd lobe on the cam, which is a slightly higher lift lobe, which raises the intake, and exhaust cams slightly higher to allow the engine to run more efficient, at a higher rpm...creating a little power.

vtec is pretty over rated....Boost is what makes power.

you can turn it off by unplugging the solenoid, or having low oil pressure.

you can change the activation point with a vtec controller....but that is pretty pointless.

 

No, not like in the vid, like a mild street cam.

 

did some googling and found this
http://todaracingusa.com/category?se...1&cid=22&id=18
they are for teh nsx, we almost share teh same engine and not sure if the cams are interchangeable. would anyone give me some insight on it? besides it being a DOHC

 

You would notice a difference because it would be pretty similar to a vtec killer cam. Those cams get rid of vtec, BUT it puts a higher cam profile (the Vtec lobe) high lobe on the regular cam. Thats part of why it idles bad. If it was on the vtec lobe all the time it would idle rough too. Maybe not to the extreme but it still would.

And vtec isnt over rated.. It offers a lot. Sure not like boost but it was never intended to be, nor could it be. It offered better efficacy and power than not having it. If its so over rated why do just about every manufacture have it?