Im 99% sure there isnt any VVT Controls for the 2.4L cobalt yet but if there is does anyone have a link?

since im pretty sure there isnt does anyone have any insight on when they will be released??

 

There aren't any from the sense of a VTEC controller, but there are those two cam motors on the top of the motor near the ignition that move the cams into vtec. Could be possible to Rig the voltage.

This idea came to me after a friends Solstice threw a Cam phase error, and turned out to be a faulty VVT controller for one of the cams.

 

where u by chance playing halo 2 last night on XBL?? sorry i ask i was playing wit a guy naked psykostevo lol

 

Ok this post has me very interested. I know the 2.4 is VVT. Which method of VVT do we have, and from i see, it is adjustable (maybe in the future?)??

 

It's basically ON/OFF style VVT. If you mess with those controllers you can force it into the later phase, but then you have no tune for the low end, and I have not even begun messing with tuning different VVT variables. No sir.

Nope, I don't own an Xbox, but I do have an account on my buddies and he has Halo 3. But I can't stand the system or that game.

 

yeah thats why im curious, could a company not make a plug in and play tune for our VVT to add horsepower like hondas do with v-tech??

i got this idea when talking to a honda salesman who said u can add about 40 horsepower to the new SI by just buying a part from honda that tunes the V-TECH or something...gave me a idea with out VVT

 

Then what do the adjustable cam timing gears do? and is our VVT a twin lobe style, where there are 2 sets of lobes for each valve, or does it just affect the timing...

 

No no no, it's not a spark timing related thing. It's larger lobes that increase the lift and duration of the valves.

The adjustable cam timing gears are available for those who want to adjust when the cams open and close the valves in relation to the crank position. They have nothing to do with Spark timing or VVT.

Yes, two sets of lobes.

And REIGNSS> you are wrong in your post on Widwest Ecotec. VVT in the 2.4L is NOT Constantly variable, it is fixed, and only engages just before 4,000 rpms. Constantly variable is always manipulating the valve timing, and few engines actually use the technology.

 

So it's like VTEC lite?

I am very interested in this...

 

It's basically the same thing as VTEC to my knowledge. We just don't use wimp ass low end lobes, or whomp ass top end lobes. It's barely noticable, but right around 3800rpms it starts to engage (and there is a dip in engine power) then by about 4100 it is fully engaged and you see the power curve jump up from there. If you want to go nuts, you can get cams made for the car, but there are plenty other things out there that make more power/$

 

Lets have a LE5 dynochart to look at here




I don't see it...

 

part of the issue is the number of things the 2.4 looks are while running. the PCM in that car is much more complex that just about anything else in it's class, IIRC it' looks at like 4xx things while the LSJ is 2xx items

that dyno chart is a solid run for a 2.4

 

Thanks

CAI and a cat-back too...but i see a lil itty bitty dip...

 

well, i'm just looking at the torque curve, i'm shocked it is that flat that early in the power band.

 

take a look at RED's dyno. pretty nice numbers i would say =P

https://www.cobaltss.net/forums/2-4l-le5-performance-tech-46/new-dyno-numbers-ion-86633/

 

People are talking about me, I feel special now
But the VVT on the LE5 is a continous system, it does not engage at a certin point like Vtec, it is for idle all the way to redline. GM made it like this to have a nice strong flat TQ curve.

 

Vtec and VVT are not the same thing.

 

So our system of VVT just adjusts the timing or timing and lift? Is there any benefit of getting the aftermarket GMPP VVT timing gear? What are the added ranges of timing/lift?

Reason i ask is that i am wanting to put in a turbo, and plan to change the valves/cams to give a better hp gain (that valve overlap is bad for turbos).

 

Isnt that what I sad, VVT is not like Vtec

 

You're not showing me a stock dyno chart. You can tune out the dip in timing i.e power.

 

winnah!

 

Here is the stock timing table for the 2.4L that has a reduced timing table to ease the noticability of the cam phasing.

There are only tables in the tuning for cams that are parked in 2 different positions. I don't see anything in the tunes, or from driving that look like the 2.4L has a continuosly variable valve timing. I will have to look it up and see what I can find elsewhere, because as we all know, we are not right all the time.

 

That HO spark table looks a little more choppy then mine, :? but I am still not seeing how you are thinking that there is a spot where the VVT engauges off of that pic.

 

Is that your modified HO timing table? if you look at the two they are drastically different.

 

Nope that is my stock HO table.