V-TEC finally makes sense

[LHOswald]

i found this video of how V-TEC works and even though i knew how it works, a visual and oral explanation makes it sOOOOO much easier to understand. enjoy



also, when it says that vtec kicks in at 4500 RPMs, thats not always true. it depends from motor to motor and i think you can even change it in certain systems so it kicks in lower or higher up the engine speed

[FDSpirit]

Can't see the vid from the phone. But yeah, VTEC varies from motor to motor. I believe in my car it kicks in between 5500-6000rpms. Its awesome. My car pushes my face back when it kicks in . It really is a great thing. Just that these ricers give it a bad rep.

[noob5,000,000]

Yeah as much as I love to joke about it, it really is pretty awesome.

[Bawked]

Hondas are brilliant, fuel efficient grocery getter which rpm activated race cams and hell even some have double wishbone suspension.

[permabanned]

zomfg people are finally getting it.

now you understand why anybody who knows anything about cars likes honda. they are race cars dressed up as grocery getters. just a little civic with better suspension than a 911. engine with more agressive cams than what most big blocks run. same engine that starts first crank and idles perfectly smoothly at 700 rpm and doesnt need to be at 1500 just to stay running. and how many other engines besides B series VTEC make 100hp/liter stock natural aspirated. not very many

[94Corolla5Speed]

If only Honda made a V8. Nice low-down torque with the screamy up-top VTEC.

[six]

You haven't felt anything until you feel a boosted VTEC trying to rip your arms off with torque steer. MEAN

[vedran]

You haven't felt anything until you feel a boosted VTEC trying to rip your arms off with torque steer. MEAN

[theholycow]

same engine that starts first crank and idles perfectly smoothly at 700 rpm and doesnt need to be at 1500 just to stay running.

What engine requires a 1500 RPM idle?
What engine wouldn't idle smooth at 700 RPM?

I'm not saying they don't exist, I seriously don't know what engines are like that...I'm used to the 500RPM idle of American V8s, and frankly the 800RPM idle in my VW seems excessive.

[ColJessip]

I Heart Torque

yumm 830hp 1017ft/lbs

I do want a vtak daily driver though. For when I start modding the shit out of the goat. Gonna keep it n/a as long as possible.

[permabanned]

same engine that starts first crank and idles perfectly smoothly at 700 rpm and doesnt need to be at 1500 just to stay running.

What engine requires a 1500 RPM idle?
What engine wouldn't idle smooth at 700 RPM?

I'm not saying they don't exist, I seriously don't know what engines are like that...I'm used to the 500RPM idle of American V8s, and frankly the 800RPM idle in my VW seems excessive.

any engine with enough cam to where you have to keep it alive by giving it a lot of rpms.

this is basically what would happen if you took a VTEC engine and constantly ran it in VTEC. it would idle like this, because race cams dont like to idle


and everyones favorite youtube video. this is what happens when you put a massive cam in something and dont raise the idle up. its probably 1 rpm above where it would just not idle. so you raise the idle up so you have a resemblance of idle

turn the volume up



EDIT: even better one. that same cam, better video of the car barely staying alive at probably 1200 rpm idle


ok this one isnt tuned, no wonder it cant even stay running.

[permabanned]

oh, and the black corvette is the prime example of what a corvette should be done. its one of americas 2 world class sports cars, the other (ford GT) is plain badass, and the corvette gets the reputation of the old grandpa driving his automatic C5 to the golf course, never getting over 35mph

a corvette should be fast enough to where any flooring of the gas results in instant neck sprain and seat ripping off the floor
it should be loud and obnoxious
it should be slammed.
it needs enormous drag radials on it, not like they are gonna hook worth a shit.
a corvette needs to be riced the f**k out everywhere. if you dont 60 foot every light and dont do a pull down every road, your driving a corvette wrong.

i hate LS sound because it just sounds so shitty and raw and just plain garbage, but that corvette, i like. if i heard a corvette doing a 8000 rpm pull in real life with a loud exhaust like that, id probaby bust a nut in my pants.

[ColJessip]

Forgot the CTS-V

[permabanned]

which LSs and mods have you been listening to Ash

modulars all sound very smooth and refined, and have that sound tahts coming thru a long big hollow metal pipe. theres a lot of echo and reverb in the sound, especially the 4 valves. even with agressive cams, modulars still sound refined and smooth.



LSs sound like unfiltered, no bullshit, rough, crude raw power. when its coming from a mullet wagon, i hate it. when its coming from a black Z0sex revving to 9k on a dyno and pegging my headphones and giving me headache, i love it. LS sound is very distinctive though, for a pushrod engine. no other pushrod V8 sound even close to it. its that barky sound at idle and screaming at high rpms.



granted, exhaust setup makes a lot of difference. having mufflers at the back makes the exhaust much barkier and more raw sounding than having mufflers in the middle like on a mustang. thats why mustangs have the hollow pipe sound, because of the echoing in the tailpipes, and the S197 mustang sound like shit, because they dont have anything to echo in

[theholycow]

the corvette gets the reputation of the old grandpa driving his automatic C5 to the golf course, never getting over 35mph

a corvette should be fast enough to where any flooring of the gas results in instant neck sprain and seat ripping off the floor
it should be loud and obnoxious

Ugh. That reminds me...yesterday I was on the freeway in a short traffic backup behind some kind of accident (the first backup I've seen on my commute this year, I think), and there was a late model Corvette in front of me. After the traffic cleared, he was just moseying along, lazily accelerating, and I was wondering how he even does that. With 1/3 of his horsepower (and almost the same weight) I was in 5th gear accelerating much faster uphill...having to pass him on the right really annoyed me.

a corvette needs to be riced the f**k out everywhere. if you dont 60 foot every light and dont do a pull down every road, your driving a corvette wrong.

Nothing I'd ever call "riced the f**k out" should ever be done to a Corvette. If you're just talking about driving fast...it might make sense to at least accelerate harder than most.

On another forum someone posted a video of a C4 being destroyed for Cash For Clunkers, and the ensuing discussion was composed of two factions:
- "OMG they clunkerified a Corvette! That's awful!"
and
- "The C4 is an underpowered piece of crap that should never have been called a Corvette and is worthless"

That got me thinking...since their market value is low enough to get clunkerified, they don't have a huge amount of horsepower, they should still have decent torque from idle, plenty of people report 30mpg without trying, and they have a manual transmission with the kind of gear ratios I like...how about a C4 for my next economy car! I bet I could average 35mpg in one.