i'm sick and tired of everybody th :gunsmilie: inking that a vtec engine is all that! i think vtec is overrated and mivec's better

what yall think??

it is the same thing. vtec, ecotec, vvi and vvit etc is the same. it was first made by BMW but honda made it better.

how about MIVEC?

it does pretty much the samething.

Vtec doesn't make horsepower.

neither does Mivec.

sorry to burst your bubble.

It's just two different cam approaches on the same engine. one for perfomance, and one for idle/cruise.

you can get a car without mivec, throw in a more aggresive cam, and have a bit more loppy idle, and make the same power.

what do you mean?

exactly what I posted.

V-tec just gives a cam a second profile, that once engaged, is just a more aggressive cam profile, be it extra lift or duration, or more or less valve overlap depending on application.

if you take any non-v-tec motor and install a cam with the more aggressive profile of the V-tec cam it will make the same power, just not idle or meet emissions as well.

V-tec does NOT make horsepower.

howzit,
i own a mitsubishi mirage with the 4G92 mivec engine and i can say this,
ive raced many cars on and off track, VTECS as well, integra's, fto's, and wot not, and to answer the question of which is better......well my mate owns an integra (which i have left for dead in a drag) i took him for a drive caz he was niave about the mivec, and he was shittin bricks......little mods like cold air and extractors and exaust, fuel reg, make a huge difference, letting the little things breath with enofe fuel is the key to saticefaction, and if u want to get more out stage 2 cams, bigger throttle bodies, and higher compression pistons will be the go, even tho the compression is already 11.5, just .5 down from the worlds fastes four the s2000....

yes, while all that will bring more out of a mivec engine, it will bring more out of ANY engine.

bigger cams let more air/fuel in the combustion chamber. that's not just a mivec thing.

Bigger throttle body flows more air. again, same on any engine.

higher compression pistons, sure, that will make more power on ANY motor. unles you want to cram wads of boost in it, then you may want to lower the compression, and run more boost, but there is a balancing act there, too.

Mivec, or V-tec does not make a car faster. even modded.

It's an emissions/fuel economy/smooth idle/sales marketing thing. Not a performance thing.

listen, to state the obvious is easy and talking about compression ratios and cams and boost.... :offtopic:

u obviously dont own a mivec engine so u dont know the differences,

i can give a perfect example, my mate owns a mitsu lancer 1.8 MR, he has just put in his, regulator, cold air, and extractors, exactly the same as wot i did to mine,we had a go at the quarter mile and i left him for dead,tho its only SOHC, the difference was minor compared to the difference it made in mine,

and u cant say that a standard 1.6 litre DOHC engine has just as much power as a mivec or vtec...........to say its a sales marketing thing is ridiculous,
they ARE a high performance engine, tiny mods make huge differences, more compared to non mivec/vtecs

the 1.6 mivec is an import from a cyborg mirage from japan, they use that exact engine in their rally cups,and if u dont beleive a word i say then ring ralliart in western australia,my car was one of the first for them to transplant the engine into, and if in more doubt contact RPW....

the reason i put a few words in the first place was to answer the question at hand are vtecs over rated....they have their pros and cons same as mivecs...

just a few sentences from ur replies angel dude

if you take any non-v-tec motor and install a cam with the more aggressive profile of the V-tec cam it will make the same power, just not idle or meet emissions as well. and you can get a car without mivec, throw in a more aggresive cam, and have a bit more loppy idle, and make the same power. (does this mean u are saying they have more power????)

but then

Mivec, or V-tec does not make a car faster. even modded.

It's an emissions/fuel economy/smooth idle/sales marketing thing. Not a performance thing.

and....

V-tec does NOT make horsepower

make ur mind up dude

OK kiddie.

Do you know what a cam is?

also called a bump stick, or a cam shaft?

It is the peice of metal that as it rotates, pushes on the valve stems to open and close the valves to let air and fuel and spent exhaust gases in and out of the combustion chamber.

The cam shaft has duration, lift, and overlap. (This is much more adjustable in a DOHC, which is PRECISELY why your friends single over head cam engine "got left for dead.")

ALL THE V-TEC or MIVEC CAMS DO THAT IS DIFFERENT IS HAVE TWO CAM PROFILES ON THE SAME CAM.

You get to have a good, emission meeting, well behaved profile for low RPM, and a more agressive cam profile for the upper RPM band, where performance dictates the airflow more than emissions.

SOOOOOOOOooooOOOOOOooooooo If you you take a cam with the "more agressive profile" from the V-TEC or MIVEC cams, and impose it on a "normal" cam shaft, the two engine will make the SAME POWER in the upper RPM band, the "normal" engine will just not idle/meet emissions as well.

same thing in reverse. take the less agressive profile, impose it on a "normal" engine, and it will run just like the V-TEC or MIVEC engine, until the cam in the V-TEC or MIVEC kicks over to the second profile.

Therefore:

If you race someone with the "more agresive profile" imposed on a "normal" engine vs a MIVEC or V-TEC, with all other things the same, the only way you will "Leave him for dead" is if you both start off from the line at 1,000 RPM.

And if you race some one from 1,000 RPM your a retard, and deserve to lose anyway.

BUT, if he's Rev'd his engine up to, say 4,000 RPM, he'll be on the more agresive profile (IE: the same one that your precious MIVEC has) and He'll make the SAME POWER THAT YOU DO.

THUS, V-TEC and MIVEC sound cool, but are not magical peices of fairy dust that get spread over an engine to make it more bad-***.

Sorry to burst anyones bubble, but V-TEC and MIVEC DON"T MAKE HORSEPOWER OR TORQUE in a race over a properly researched "normal" cam.

I'm sorry that your having a difficult time with the english laguage, but I have been saying the SAME THING this entire thread.

... and then besides the fact, V-tec makes aftermarket tuning a car a real pain in the rear, with the sudden jump in airflow to tune around, many people in highly moddified cars just yank it out for simplicity.

toodles. :thumbsup:

:clap:

:whistling:

Fine, MIVEC is greatest thing since sliced bread.

SO DROP IT.

I don't get it... a picture of an engine suddenly makes MIVEC the greatest thing on the planet?

I can post pictures of my stock engine that made more horse and torque than that... without MIVEC...

I still fail to see where that would help this discussion of V-TEC making /\/\4d Ph47 _|D/\/\ P0\/\/4, Y0!!!11!!!11!

I just don't see it.

perhaps from the stand point that it lets the engineers and designers give the engine a bit better top end because they don't have to compromise on the cam as much, but really, that's all I see.

If someone could kindly explain to me why a cold air intake makes more power with MIVEC or V-TEC versus a "normal" engine with the same aggresive end cam profile in the upper RPM band, I'd be happy. really. anybody.

I thought 3 simple bolt-ons makes 50 extra ponies?????

:laughing: :laughing:

each to there own,

More like, "Ignorance is bliss."