Well in cars like the Ford ESCORT ZX2 no company ever figured out how to properly tune the engine. So any kits that existed just disabled it. Yeah you loose HP and most importantly the emissions control at higher HP rom disabling VVT, but any kit you put on is going to make far more power then your base engine with VVT that you'll never know the difference really.

 

i guess that is true but how come no one can figure it out isnt it similar to v-tec, maybe a v-tec controller would would?

 

Every engine uses it's own completely different computer designed and programmed by the car maker. The car makers are not allowed to give out the code that are used to control the engine. So companies have to backwards engineer the parts. Also every car company uses thier own unique implementation of these techniques. Hondas v-tec is in no way similair to the ECOTEC's VVT, so you can't share engine controllers. They have to be designed from scratch pretty much, and they're fairly complex to get right.

 

this really sucks cuz i am very hesitant to disable a great feature such as vvt but i need to turbo it so i gotta do what i gotta do which is harrass the companies to make this for us lol

 

I don't know much about Celicas or Cobalts for that matter, but any engine can be turbo'd, it’s just a matter of getting a tuner who knows what they are doing. In my opinion, that’s going to be the toughest battle for you. VVT, Pistons, Exhaust Ports, mean nothing unless the ECU is calling the shots correctly.

Since your not going to be the one tuning the car, I would find the person who will eventually do the work, and ask them what’s the best set up, and/or if it's even possible to tune this motor. When your end game is huge reliable horsepower, the endgame is a proffesional tune, and you want your setup to be something the tuner is familiar with. GOOD LUCK ON THAT!

If I was spending your money, which I'm not, I would get an old Scooby and tune the heck out of it. Cars that are already turbo’d are very easy to add power to. Furthermore the support for the WRX is fanatical; you could find a dozen shops in any state that could do the work.

Good luck let me know how it turns out.

 

if the civics can do it then the cobalt can, i mean vvt cant be all that complicated, the reason the celica doesnt turbo well (gt excluded) is due to the lift mechanism it has at high rpms the engine starts to misfire

 

From my driving experience so far, the 2.4 has two different valve timing "sets" that it uses... for simplicity's sake I'll call them "high" and "low."

As far as I can tell (by listening to the engine note change as I drive) the VVT can kick in at any RPM, based simply upon how hard you are on the gas. The note change that indicates high or low valve timing is pretty obvious, especially since I have the intake on. When I'm just cruising in traffic the engine makes a specific tone... but when I get some space and really hit it the tone totally changes. This isn't just the elevation in pitch from the engine running harder at higher RPMs, it's a totally different note. Now from what I've heard (and this could be really wrong) Honda's VTEC kicks in at a specific RPM point and runs from there. So there are two totally different systems at work here.

GM says that this VVT produces more torque in our engines under heavy throttle, thus increasing performance while still allowing higher fuel mileage when driving under light conditions. GM apparently plans to use VVT in a lot of their engines down the road, so I would expect the aftermarket to develop some kind of tuner for it as time goes by, it may be a few years though.

 

vtec turns on at a certian rpm and stays on above that limit , and changes to a high lift lobe

the 2.4 vvt , is continiously variable , the computer tells it when to change and how much to change , cam lift profile is the same , only the timing of it changes , similar to a adjustale cam gear

 

dood, work with some dealers...i got a ss/sc for less than 400/month...28k total financed...

 

so is i-vtec...

you wouldnt need a controller for the vvt to run a turbo...plan and simple.

 

so i can just run the turbo with no interference from the vvt? and i got a good deal on my 2006 victory red cobalt ss 2.4 vvt automatic fully loaded with supercharged body kit and wing for 382/month for 72 months with 1500 down so im cool there i pick it up early next week