So they add vvt to the 2009 cobalts? is it good for performance tuning, or more for fuel economy or both? i heard its making around 155? A buddy of mine is looking into a new car in this price range so wondering on the differences.

 

Its good for fuel & its pretty peppy too. the 155 is at the fly btw but yeah its something to start with

 

It's best for economy and emissions output.....the way GM is tuning them.

 

not to mention vvt seems to make cars sound alit better.. the 1.8 L vvt astra sounds better then the 2.2 L ion/ cobalt lol

but yes it's for both fuel as well as power.. there's a reason the 2.4 gets more hp aside from the bore increase higher compression and 35 MPG.. it helps out alot

 

You'll definitely notice big gains on the top of the RPM. Works the same as honda's VTEC you definitely know when it kicks in. Now if they came out with a way to control it with an SAFC like the VTEC so that you could set it to kick in earlier then you'd really notice a difference.

 

actually the vtec is a bit different, it's got the electronic lift control which we dont have

 

Bore size is the same, stroke is different.

 

2.4L: Bore 88mm, Stroke 98mm
Other advantages: 68mm TB, larger intake and exhaust (SS version), VVT -- this is not like Honda VTEC -- each cam moves up to 60 degrees negative and 60 degrees positive -- they are in constant motion depending on engine needs and do not "kick-in"; bigger exhaust.

2.2L: Bore 86mm Stroke 94.6mm
Other items: 60mm TB -- '09 VVT.

 

Yeah, its for economy, almost entirely. It increases fuel mileage, lowers emissions and cuts down on the number of heads GM has to make(it uses the LE5 head) But a side effect of the improved efficiency is higher horsepower, 7 more than '08

The 2H0 Astra engine sounds different because its a completely different engine and head design, its not strictly the VVT.
You dont know what the f*ck youre talking about, its nothing like VTEC, youll never be able to tell when it "kicks in" because it doesnt kick in, its constantly variable, sometimes it advances sometimes it retards,and it doesnt adjust valve lift, there is no noticeable evidence its working

The LE5 has a different bore and stroke than the L61/LAP/LE8

 

So what else has changed about the 2009, I have a 2009 LT, so stuff like intakes and headers from a 2008 2.2 will they still fit? also stuff like the hurst short throw?

 

Honestly take a bnch of pictures so we can see what looks different. We can't give a good answer without someone trying.

 

Headers are the same, if youve got NU3 youll have the same issues as all 2006-up Balts with SAIR

Intake manifold on the LAP is the same as on the 08-09 LE5(07 LE5 design uses bigger runners, will work on your car)

Theres no truly noteworthy changes to the car that would affect what mods you can make in relation to other 2nd gen L61 or LE5 powered cars., remember the car is on its death bed, they arent gonna spend a boat load of money on it. The new 2.2 LAP is just an L61 with an LE5 head.