i was readying on another site and it said that for 2008 the 2.4L motor will be geting DI and haveing 200hp. as anyone else heard this yet?

 

back up your research...link?

 

opps sorry about that. it was said from another member thats why i dont know if its true or not. just thought i would ask incase anyone else knowes.


http://www.gminsidenews.com/forums/s...ad.php?t=42439

 

damn looks like i might have to trade in a couple years earlier

 

that or figure what they changed n see how hard it would be to make the same adjustments

 

The tech was telling me the exact same thing today, and the 2.0s' will be direct injection also in 2009

 

Whjat exacly is direct injection?

 

well...if im correct...i believe its just what it says it is....fuel being injected directly into the cylinder...benefits might be a be a/f ratio...but im not sure what other benefits it might yield...

 

I have not heard about any of this. But I can offer some insights. It's not improbable. Direct Injection injects fuel directly into the combustion chamber in the same way a diesel does. Not new technology, but it hasn't been used in gasoline engines until recently. It is better design because there is no fuel spraying against the back of the intake valve. Also, fuel can actually be injected at any point during the 4 stroke cycle. You could actually inject fuel during the exhuast stroke, which, believe it or not, can be a good thing.

The LNF Ecotec is DI. I doubt the LSJ will change, but like the story about the LE5, it's possible.

 

if its true how hard to convert?

 

id imagine it would be a bit difficult....id say you had have to tap each chamber to hold an injector...which IMO would be a good deal of work....or maybe not...but once again im just speculating

 

It would not be a financially smart thing to try and convert. Easier and cheaper to trade up.

You would have to replace the head. And that would only be possible if the new engines maintained the same mating surfaces as the old ones. Then you would have to completely replace your fuel system and ECM. And an aftermarket ECM wouldn't even be possible due to the completely different injector fire timing of DI.

 

in that case they better not, but if they do wow 200hp from a 4bannger to start not bad, but then its hopeless to compete

 

well consider the vw has 200hp from a 2.0 turbo...GM's 2.0 turbo w/ DI puts out 260hp
and the 2.4 having 200hp N/A can be nothing but a good thing
the horsepower wars are back on again and im loving every second of it

 

200hp from a NA 4banger is pretty impressive as it is.

more of a base to start from.

 

Well have any of you considered changing your fuel injectors to ones that are a little larger, and then getting your VVT retuned, as well as other things retuned. You guys are missing a lot of horsepower by leaving the engine alone. Intake and Exhaust will get you a little bit of hp, but that and a nickel will get you a hot cup of JACK SQUAT!

Don't under estimate the engines you have got.

As for direct injection, the fuel in sprayed directly into the cylinder, and directly over the spark, this guarantees a better combustion, resulting in less knock, less wasted fuel, and more potential for higher rpm HP.

 

The 2.2 should get DI as well and a bump to 155 hp .

 

Adding my 2 cents....

The aforementioned benefits of improved combustion/mixing are true, but...
Another MAJOR benefit of DI is the fact that it cools the the combustion mixture a lot moreso than standard fuel injection, allowing faster timing, higher rpms (with appropriate valves, etc.) This is a WONDERFUL thing for forced induction, my friends....

peace out...

 

damn, what's the point in getting ups if whatever you get is going to be outdone by the latest model that is stock??

 

no **** dude! i just bought my 2007 2.4 last week and this comes up... well all i have to say is: at least my new car is 10x's better than my last car (base cavalier).

 

i feel ya bro. i got mine in april of 06 and i've been looking at some aftermarket parts ever since but this just blows all of that away

 

Well, the S2000 does it, but this is impressive for being around 20k vs around 36k lol. Direct injection would be damn near impossible to convert over unless you are an extremely experienced mechanic, both wrenching and tuning or you have a LOT of money to WASTE. Yes waste, better off spending it on a turbo setup. In a DI setup, the fuel sprays at well over 1000 psi into the cylinders, theres less waste and therefore yields higher power and less fuel consumption. Theres a good article about it in GM High Tech performance somewhere.

 

eco junk how much does your car weigh in at?

 

well, what if when they did come out with the 2008 cobalt 2.4 and it does have the 200 hp, couldnt you just buy the engine and upgrade your ecu or something and just install the engine?

 

then why not buy the 2.0 turbo?