marks_lude

I wouldnt say vtec goes against that at all, its merely a limitation of a generic "safe" factory tune. A properly tuned car feels as smooth as anything else out there.

The benifit is that you have cams that allow your car to start easily but will die off quickly when reved out, and others that will scream at top end. if tuned right you get easy starting engine, that pulls to 8k (on my prelude), or 9k on the S and it will feel like flawless constant power.

I dont know if youve ever been in a well tuned car, but there is no 'kick' at all to speak of.

INTJ

VTEC is no big deal. Who is saying it is? Now slap them. Tards.

3ngin33r1

Frak VTEC...

VTECH FTMFW!

dubbs693

I enjoy hitting vtec..

I think its fun to joke about tho..

Dutch_Dave

Variable valve timing is NOT the same as VTEC..... as most of the systems named in the original post.

Variable lifting height of the valves is quite unique.

I'm not saying there aren't other systems that do more or less the same, but there is a difference...

iheartap1

yup yup

kndonlee

I'd definitely agree. One of the factors, definitely so.

At least in stock configurations, there's a very slight kick, but nothing like a turbo rush. I should correct myself and say that stating that vtec goes against the NA/linear power ideal is really just splitting hairs.

Yea, I totally understand that the cams shift in timing/duration/lift to accommodate the full range of rpms, so there isn't the low rpm versus high rpm trade off in air/fuel delivery.

For the most part the f20c's hp delivery is linear throughout the rpm range. Looking at dynos from stock s2k's there is marked difference in the slope once the camshaft shifts profiles aka "vtec kicks in", but it's nothing the turbo spike. I do recant my statement on vtec going against the NA/linear power ideal.

There is a 10ft/lb spike in torque with the added air/fuel when camshaft shifts profiles, which is most likely the very slight "kick" I feel. Never have ridden in a tuned stock s2k, but I'm sure just looking at the dynos of a tuned car would be more than enough to show the difference between stock and tuned.

Ultimately, I'm just slightly annoyed by the vtec hype that some people have, as if that's the sole reason for such greatness in the f20c powerplant, so I'm just venting. I like having as balanced a perspective as possible in all things.

kndonlee

I was just listing things I love about the s2k as to not coming by as dogging on the s2k. Since a negative tone can come by as flaming and that's not productive. Lots of intelligent, constructive posts.

Yea, like most things, lists of features with an "X" don't mean as much as how the complete package is put together. A lot of higher level comments I stated are a commendation on the engineering that has gone into the s2k, moreso than the features itself.

Shoot, give some engineer a VW cabrio, money and effort, and I'm sure they could easily modify it to be feature by feature complete against an s2k, but that's besides the point.

TreyDM

Vtec motors = hondas patent to nissans idea in the beginning
Good = gas milage in low rpm and power at high rpm
Bad = in striclty race motors-too many moving head parts and too much weight.

Honda has had the most success with the Vtec engine.
The VVTL which toyota has (now lotus owns for thier cars) was actually built by yamaha NOT toyota.

kndonlee

Yep, you're right. Timing, lift, duration, all very different things, but most all systems have the same design goals in mind from a higher level looking down. less air/fuel at lower rpms and more air/fuel at high rpms. Cams that work great both high and low.