i am currently looking for an automatic car with a good ammount of tq like the 2.4 liter that can be turboed with no problem. i have a celica right now that cant be turboed due to its vvtl-i causing misfires and back fires and a huge power loss in hiogh rpms. so i need a car that i can tune easily and boost easily, is this a good choice?

Right now, no.

Later down the road. Yes.

Give about a year before full support is available afterwords.

i am currently looking for an automatic car with a good ammount of tq like the 2.4 liter that can be turboed with no problem. i have a celica right now that cant be turboed due to its vvtl-i causing misfires and back fires and a huge power loss in hiogh rpms. so i need a car that i can tune easily and boost easily, is this a good choice?

How about the G35???????

well the deal isnt gonna go thru like i wanted or else i would get the g35 but they want 550 a month for that car which is way more than i wqanna spend 400 is my max since i want money left over to turbo the car i get.

just get a used audi A4 1.8t they are not that much they are auto thay are turbo and they have AWD

so, right now there is no turbo kit that will fit it? i was thinking the 2.2 kit would fit but i guess not

sorry i dont like audi's

Sabb

Get a couple year old S4 with the 2.7 TT and you would be ready to go. I was about 5 min away from getting one but it was just a little to expensive at the time. But the amount of after market parts for it is insane. Goapr.com

so, does anyone know if this vvt will make this engine hard to turbo?

so, does anyone know if this vvt will make this engine hard to turbo?
it should not look at all the turbo hondas with vtec

so, right now there is no turbo kit that will fit it? i was thinking the 2.2 kit would fit but i guess notA turbo kit designed to fit the 2.2 WILL fit. Same exhaust port configuration on the head, same exhaust. Additionally the 2.4s rod to stroke ratio would be better suited to boosting than the 2.2 even, as the rod is shorter (and forged steel- the 2.2 is only powdered metal).
Only issue might be the higher compression ratio (10.4) that might limit boost levels somewhat, but it's still not so bad.A decent intercooler will help. And dont let anyone scare you with the fact that the piston "is only" of the hypereutectic variety- thats all the LSJ is using as well and it seems pretty good! The only concern would be getting the correct tune.
WHO'S GOING TO BE THE FIRST TURBO 2.4 VVT???!!!
WopOnTour

I'm going supercharged 230-250 stock

10.4 is very high comp to be great with boost. its not impossible but harder to tune and more chance of the big bang effect. hypercraptectic pistons are junk... they are full of silicon to prolong life and for environmental control reasons. knowing first hand how weak these pistons are. i would be very scared to run boost over 9 #. but i think that 6-7# would be assuming u have a good tune and very reserved timming any knock and kabooom at high rpm/boost

10.4 is very high comp to be great with boost. its not impossible but harder to tune and more chance of the big bang effect. hypercraptectic pistons are junk... they are full of silicon to prolong life and for environmental control reasons. knowing first hand how weak these pistons are. i would be very scared to run boost over 9 #. but i think that 6-7# would be assuming u have a good tune and very reserved timming any knock and kabooom at high rpm/boostThe 2.0 LSJ in the supercharged SS is 9.5:1 with hypereutectic pistons- seems to work well enough for IT -even at 16-18psi! It's all in the execution. And btw the silicate concentration has NOTHING to do with environmental issues!- OMG :lol:
WopOnTour

hypercraptectic pistons when used as they were intended to be, hyper pistons provide excellent trouble free performance while aiding in reduced emissions numbers. Unless the intended use involves high compression / big NOS / high boost or sustained high RPM, opting for forged pistons is a waste of the extra dollars spent. In the hands of a careless driver that does not pay attention to oil changes or is perhaps prone to getting on it a bit before the engines properly warmed up, forged pistons will usually wear out / fail long before a hyper one would. It has to do with how tight they are able to fit a hyper piston as opposed the wide clearances needed for a forged unit.

Hyper pistons have a high silicone content to aid in the casting process, it sure doesn't help with durability though. If you do a cross section of a hyper piston you will often find silicone pockets, basically looks like swiss cheese

i've worked in a mustang performance shop for a couple years i'm sure the quality of the mustang pistons is much lower, and a mustang piston is much larger which adds to its weakness.

that being said, i'm saying running 6-8psi is safe, run more if u'd like i've seen guys run 12psi on stock mustang motors, some fail, some don't.

i've never seen or worked on a 2.0 compared to a 2.4. everything i state even the emissions statement was correct so go and OMG yourself.

and 10.4 : 1 is very high for a boosted ap, has anyone boosted a 2.4 VVT motor cause the 2.0 doesn't have VVT does it???

WopOnTour what are you laughing about? have you ever boosted a 2.4? what mechanical back ground do you have?

well i do feel kinda dumb now thinking that the vvt would be bad for boosting since , 1: the twin turbo supra has vvt and its one of the best engines around. 2: all the honda turbo fine with v-tec so i have nothing to woory about, but i dont really understand this piston thing you guys are talking about, i need to make sure because i will be buying the car this week

the 2.4 is the only vvt motor in the cobalts

and the vvt that is used is variable cam timing , not a change in valve lift like vtec


it is alot harder to boost a the vvt motor , because of the cam changes arent as predicable , like the change to vtec is

it is possible , but harder

how does the supra use the vvt so well?

any other input?

GM will be using the 2.4L in a lot of cars. The aftermarket will be huge in a year or so

how does the supra use the vvt so well?
Cars like that and the new EVO IX and possibly the upcoming Turbocharged ECOTEC use VVT properly because they're designed to. It's difficult for the aftermarket to properly tune it since the programs that run everything and tech data are not available for the ECU to look at.

i see so i would need a vvt controller to effectively turbo this car then, is that what u are saying?

i see so i would need a vvt controller to effectively turbo this car then, is that what u are saying?
Some company needs to figure out how to properly alter and control the VVT to tune it to work with forced inducation properly. What a lot of after market companies do with VVT engines they no one has properly hooked into the system is they just disable it.

wouldnt disabling it kill hp? or would it just kill gas mileage? or both? i dont care about the mileage but if it hurts hp then i would wait until i can get it tuned

wouldnt disabling it kill hp? or would it just kill gas mileage? or both? i dont care about the mileage but if it hurts hp then i would wait until i can get it tuned
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?

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

well the deal isnt gonna go thru like i wanted or else i would get the g35 but they want 550 a month for that car which is way more than i wqanna spend 400 is my max since i want money left over to turbo the car i get.

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

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


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