VVTi controller

[ddongbap]

Originally Posted by jspexae102

HKS Valcon Electronic Valve Timing Controller
http://www.hks-power.co.jp/products/...on/valcon.html

yes, it's only for the 1JZ, 2JZ and 3SGTE, and you'll have to use the special HKS cam set, AND it's only avilable in Japan, but it does exist

Power Enterprise also makes one, called the Camcon for Toyotas. The reason why the only engines that these cam-modifyers for toyota inline engines, is because nobody has come out with a unit that'll control two sets of VVT-i, in a single unit. You can run two of these electronic devices for a V shape engine, but it'll just cost more.

Originally Posted by Ghost

ask yourself a really important and smart question.........DO YOU LIKE BEATING THE SHIT OUT OF YOUR ENGINE......to get 10 more horsepower or would you like to have that 10 ponies at any rpm.........i don't know but the answer is rather a simple one to me....

if your are gone modify a civic, why not get a better car with a biger engine, which will probably cost you less.

I highly doubt 10 extra hp would put such a big strain on your engine. After all, its only 10 hp. If you tune your engine though, and add more parts, then the VVT-i unit adds power exponentially. If you really understood how VVT-i, and other forms of variable valve timing worked, then you'd know that these forms of technology aren't exactly engine destroyers.

There were some people asking, why not put V-Tec at 0 RPM and have it run from there. It wouldn't work. If you set V-Tec too low, you'd be losing power. Its complicated how it works, but if you want, I'll elaborate. V-Tec, and VVT-i controlers aren't worth much unless you tune the car.

[Flashmn]

Lots of misinformation in this thread.
Lets just say it short, Vtec mimics two cams, one "economy cam" and one "race cam". Both have their own cam profiles. Therefor you can drive relatively normally (With normal power) in low rpm and get some gains at high rpm compared to this "econo cam".

Now Vtec doesnt create power in itself, its the bigger cam in it. You can actually make a toyota 4A-F/FE/WHATEVER without VVTI perform like the vtec cam, by putting in a bigger cam. Problem is, you'll get shitty low RPM performance and crappy idle, however you'll have the exact same performance high rpm.

Thats what vtec is about, its about the possibility of not having to make a compromise with the cam, your car will have good idle and pass emissions and still have higher performance above. Its not there to give you additional performance.

AS for vtec controllers, I personally havent seen them in professional race cars, that actually go to the track. Not the "professional race cars" you see in drift competitions and import tuner.

Also to continue this seed of information, saying you cant adjust cams independently on a FE head is crap. YOU CAN, theres actually two ways. Conversion kit, that changes the gears into such that move freely (yes theres development for such) OR taking out the cams and putting them in, in another position than stock. Its just a matter of getting creative and thinking out of the box. Ofcourse cam adjustments are gonna be harder than just opening few allen head bolts and twisting the sprocket. Then again, you shouldnt be twisting that thing anyways, unless you have a dyno or actually have knowledge on what you're doing. And no import tuner doesnt qualify as study material.

Its complicated how it works, but if you want, I'll elaborate.

No its very simple how it works.

If I repeat some things found on this thread, I appologize, I was too tired to weed through the BS.

[ddongbap]

Originally Posted by Flashmn

Lots of misinformation in this thread.
Lets just say it short, Vtec mimics two cams, one "economy cam" and one "race cam". Both have their own cam profiles. Therefor you can drive relatively normally (With normal power) in low rpm and get some gains at high rpm compared to this "econo cam".

Now Vtec doesnt create power in itself, its the bigger cam in it. You can actually make a toyota 4A-F/FE/WHATEVER without VVTI perform like the vtec cam, by putting in a bigger cam. Problem is, you'll get shitty low RPM performance and crappy idle, however you'll have the exact same performance high rpm.

Thats what vtec is about, its about the possibility of not having to make a compromise with the cam, your car will have good idle and pass emissions and still have higher performance above. Its not there to give you additional performance.

AS for vtec controllers, I personally havent seen them in professional race cars, that actually go to the track. Not the "professional race cars" you see in drift competitions and import tuner.

Also to continue this seed of information, saying you cant adjust cams independently on a FE head is crap. YOU CAN, theres actually two ways. Conversion kit, that changes the gears into such that move freely (yes theres development for such) OR taking out the cams and putting them in, in another position than stock. Its just a matter of getting creative and thinking out of the box. Ofcourse cam adjustments are gonna be harder than just opening few allen head bolts and twisting the sprocket. Then again, you shouldnt be twisting that thing anyways, unless you have a dyno or actually have knowledge on what you're doing. And no import tuner doesnt qualify as study material.


No its very simple how it works.

If I repeat some things found on this thread, I appologize, I was too tired to weed through the BS.

Well, yes the big cam would get you same power as a car under V-Tec. It would be a shitty daily driver though, like you said.

The reason why pro race cars aren't running V-Tec controllers, is because the aftermarket ECU already allows for V-Tec crossover changes, but you'd need a laptop to change it. The V-Tec/VVT-i changer just allows for ease of access. (Even though with out proper tuning, it wouldn't get you very far. If you're on a dyno, you might as well have a laptop.) Yes I understand these things.

Drift cars are pretty much race cars. I'm not sure what amateure drifting class you're looking at.

But yea, almost all of what you said is pretty legit. If you get into the specifics of any variable valve timing, as far as tuning and power band issues, its not 'that' simple.