wut does vtec mean

[tegrapower]

when ppl say listen to the vtec kick in..does it act like a turbo or what?

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[ziggz501]

it's easier heard on a DOHC engine, ei the civic SI or the integra. It kicks in at different times on every honda engine, but on the teg it starts at 4400 rpms and can be heard really well at around 5800+. it is easiest to hear vtec on an engine with an aftermarket intake. but yeah, it basically does the same thing as a turbo. it lets more air into the engine. more air and fuel = more pwr. it's what turns the 130 hp grocery getter type r into a 190 hp race car at the higher rpms. in most engines the power is in a curve, but in a honda it's pretty much a line upward i.e. the power doesn't curve, it keeps coming. i'll try to find u a video to show u how it works.

[ziggz501]

here's the video. there are other videos out there.
http://videos.streetfire.net/s...a.htm
also, team-integra has a fairly detailed article on how it works and what is necessary for it to kick in.

[tegrapower]

ty..so would it be bad to put a turbo on a vtec engine?

[ziggz501]

no, ppl around here do it all the time. i have heard it's a little harder to tune, but 99% of the ppl on honda-tech will tell u to turbo for more pwr.

[ABCVTEC]

VTEC stands for Variable Valve Timing and Electronic Lift Control. ziggz501 described a GSR motor's VTEC kicking in which is the most unique out of the 3 B-series VTEC motors in that it has secondaries. VTEC can "kick in" at whatever RPMs you set it to, but it's recommended no earlier than 4500RPM and I wouldn't recommend earlier than 5500 in my opinion (aside from on a GS-R engine).

It's nothing like a turbo and should never be compared to one in any way. You can still turbo a VTEC motor and many people do, it will just require a little more tuning for better performance up top. The most important factor when turboing a car is the compression ratio of the motor, not whether it has VTEC or not.

[tegrapower]

o ok how would i be able to tune the engine for that? can i just take it to any shop

[ABCVTEC]

If your motor is stock there is no point in adjusting when your motor engages VTEC at all. Once you have done some serious modding you can mess with your VTEC setting. But once you have done some serious modding you will have to take your car into get tuned anyway.

[o0oz]

i cant believe i did this juss to show you... but here it is!!!!!!!! masterpiece!!!

[VTECth1s]

Originally Posted by tegrapower

when ppl say listen to the vtec kick in..does it act like a turbo or what?

This is what vtec means, according to your topic question. VTEC is an acronym for Variable valve Timing and Lift Electronic Control. VTEC is a valve train system developed by Honda to improve the volumetric efficiency of a 4-stroke internal combustion engine. This system uses two camshaft profiles and electronically selects between the profiles. This was the first system of its kind. VTEC doesn't necessarily act like a turbo, but I do understand your point, it has a the similar concept and principal, but generate different powerbands of course. The transition of a turbo spooling, is similar to vtec engaging, both vtec and turbo engage at a certain rpm, and both generate a certain amount of power when engaged.

[tegrapower]

thank ya so much for help n the picture that actually cleared it up for me

[o0oz]

np

[vladd]

Originally Posted by VTECth1s

This is what vtec means, according to your topic question. VTEC is an acronym for Variable valve Timing and Lift Electronic Control. VTEC is a valve train system developed by Honda to improve the volumetric efficiency of a 4-stroke internal combustion engine. This system uses two camshaft profiles and electronically selects between the profiles. This was the first system of its kind. VTEC doesn't necessarily act like a turbo, but I do understand your point, it has a the similar concept and principal, but generate different powerbands of course. The transition of a turbo spooling, is similar to vtec engaging, both vtec and turbo engage at a certain rpm, and both generate a certain amount of power when engaged.

what're you smoking? turbo and vtec can't be compared. about the only thing they have in common is that they're both engine-related. a turbo spooling is nothing to like vtec crossing over; vtec doesn't take 2k rpm to crossover like a turbo does to spool up. vtec doesn't force air into the engine like a turbo does.

there is a red search link in the top right hand corner, all the info you could possibly want on this topic can be quickly found.

[martyball619]

throw some very aggressive cams and pistons in ur car and u really know what vtec is all about. i had a teggy GSR with skunk cams and i smoked an LS turbo.. i can hear him spool right behind me.. and that is also with an ITR tranny i use to have. NA all tha way IMO

[ForceFed Motorsports]

If you really want to understand VTEC, what it does, how it works, and why its used then you need to walk through this Very helpful.
http://auto.howstuffworks.com/question229.htm

[vladd]

Originally Posted by DC2SiR

throw some very aggressive cams and pistons in ur car and u really know what vtec is all about. i had a teggy GSR with skunk cams and i smoked an LS turbo.. i can hear him spool right behind me.. and that is also with an ITR tranny i use to have. NA all tha way IMO

the ls turbo must've had something wrong with it. even a t3 on an ls will easily put out 200+ whp, while your car was probably under 200. na is for people who don't like to go fast.

[ABCVTEC]

Originally Posted by vladd

the ls turbo must've had something wrong with it. even a t3 on an ls will easily put out 200+ whp, while your car was probably under 200. na is for people who like to have a reliable motor.

fixed

[vladd]

Originally Posted by ABCVTEC

fixed

wow thanks for the fix, couldn't have done it without you. this topic has been debated about numerous times, feel free to search. how reliable are motors that rev to 9k just to make some power? if you're comparing a stock motor to a turbo'd one, then yeah the stock one will obviously be more reliable. however, if you're comparing an all-out built na motor to a turbo'd one, they're both pretty much equal as far as realibility goes, except that the turbo'd motor will put out more power for less money. a gsr with aftermarket cams has nothing on a turbo ls, even if it's a small turbo running low psi. an ls with a t3/t4 will easily hit 250 whp, which is impossible to hit na on a gsr motor, no matter what you do to it.

[martyball619]

Originally Posted by vladd

na is for people who don't like to go fast.

no, NA is for people who likes to build their motors and not going the easy way out (turbo).. when a turbo smoke a NA its nothing interesting.. but when a NA smokes a turbo.. every1 would be like WHOAAAA

[Black99dc]

i beg to differ with VLAAD, oh, and nothing is impossible, i've seen it done....a friend of mine is pushing right at or little more than 250whp with only around 5grand in the motor NATURALLY/ASPIRATED....i have ridin in it, its nasty....redlines around 11,000...from what i know it has 12.5:1+ compression....if you don't believe me then ask him yourself...

For all the non-believers click this link

http://profile.myspace.com/ind...06269


Modified by Black99dc at 12:13 AM 6/1/2007

[Championship]

Originally Posted by DC2SiR

no, NA is for people who likes to build their motors and not going the easy way out (turbo).. when a turbo smoke a NA its nothing interesting.. but when a NA smokes a turbo.. every1 would be like WHOAAAA

sorry just had to sig it...it sounds funny

Originally Posted by vladd

wow thanks for the fix, couldn't have done it without you. this topic has been debated about numerous times, feel free to search. how reliable are motors that rev to 9k just to make some power? if you're comparing a stock motor to a turbo'd one, then yeah the stock one will obviously be more reliable. however, if you're comparing an all-out built na motor to a turbo'd one, they're both pretty much equal as far as realibility goes, except that the turbo'd motor will put out more power for less money. a gsr with aftermarket cams has nothing on a turbo ls, even if it's a small turbo running low psi. an ls with a t3/t4 will easily hit 250 whp, which is impossible to hit na on a gsr motor, no matter what you do to it.

your on f*ckin crack.

you have never seen a 250whp all motor on a gsr?....where have you been? (another example why your post count and time of sign-in doesn't have to do with your I.Q on motors)

n/a and turbo have been at it for sometime now, but it's not something you can compare.

going all motor is just a motor enthusiast who likes to get their hands dirty and just build fast motors.

going turbo is the quickest/fastest way to gain hp, but some might not call it fun when building a motor

so my point here is......aaaaaah whatever, im baked and hungry and sleepy.

goodnight

[ABCVTEC]

My friends B20VTEC EF hatch made 225hp untuned, and I believe 243hp on the dyno after a tune. It was able to edge out Cobra Mustangs and sub-400 Civics/Integras from a roll. When it came to racing at the track, it beat out most FI cars up to 500hp.

And an LS isn't going to put out 250hp on low boost with a t3/t4. It's going to need to be running at least 14PSI. That's 110hp more than stock so it's going to take a bit more than low boost.

The way the story gone has always been like this. With NA, the power is always there. So while these FI cars are spinning through 3rd and 4th, the NA cars are hooking up and half way to the finish line. On the highway it's sometimes a different story, but thats street racing and street racing is gay.

Trust me, I have friends that live this everyday. One kid has a 650whp EG civic and my other friend has a BMW 328is with a medium sized turbo. The BMW constantly smokes the civic and the civic owner is always like "You know I'm faster than you so who cares." And my friend with the BMW always replies "Ya but its not my fault you don't hook up."

Of course it's a different story with the LS-T as you dont have to worry about spinning as its only 250hp, but you still have to wait for that snail to spool. IMO a 200whp NA car can definitely beat out a 250hp LS-T. Possibly even 190whp NA.

And don't get me wrong, I'm all about turboing a car. But I do give my respect to the NA people.

EDIT: And to the comment about reving to 9k to make power.. The only people that are reving to 9k in their NA setups are:-

A. People who have a really beefy setup and redline at 11,000

and

B. Idiot kids who ignore dynocharts and don't realize that their power band starts to drop at 7600 and rev to 9k just to be mad VTEK TIGHT CooL y0.


Modified by ABCVTEC at 12:30 AM 6/1/2007

[Championship]

Originally Posted by ABCVTEC

Of course it's a different story with the LS-T as you dont have to worry about spinning as its only 250hp, but you still have to wait for that snail to spool. IMO a 200whp NA car can definitely beat out a 250hp LS-T. Possibly even 190whp NA.

i agree because ive seen it done before

[Championship]

Originally Posted by ABCVTEC

And don't get me wrong, I'm all about turboing a car. But I do give my respect to the NA people.

same here.

[ABCVTEC]

Another thing to take into consideration if you want to make good track times in a 4-cylinder NA car, you have to pick a light shell. Which is why most of the badass NA builds you will see in the NA forum are with CRX/EF/EG shells. It's going to be hard to squeeze out a lot of power in an Integra shell as they weigh a good 500-600lbs more, unless you're messing with a K24/K20 set up:-p (completely irrelevant).

Weight is why I support FI setups. Because I love driving an Integra, never really felt comfortable in a CRX or Civic. And with a turbo you can make decent power. But it's not to say I wouldn't be happy with a 210hp NA setup either.