ok, this im guessing this VVT thing is like Honda's VTEC, am I right? and this head assembly is on a 2.4 Eco which im not sure, but I think it is 180 degrees the other way, correct me if im wrong, or it spins the other way? could it be possible to put the codes from the cobalt ECU into to J-body ECU for the VVT? I would love to put it on my 2.4 but im guessing it would be close to impossible, i doubt its even been done before. any pointers?
NO. Simple answer. The LD9 and Eco 2.4 are totally different motors. Nothing from one will work on the other.
I used to race cars, now I race myself.
5K PB: 24:50
10K PB: 54:26
No the only way to make it work is swap the entire engine, harnes, ecu, tranny guage, etc etc etc into the Cavalier. Dont quote me on this but Im pretty sure the way VVT works is there are different positions for the cams and for each of these there are correlating timing and fuel maps in the computer, meaning there is no way to just make it work with an 03 ECU or make a magical adapter which will allow it to function correctly. You need the whole computer, or some way to dynamically change map values on the fly while the computer is on without reflashing it.
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VVT and Vtech are not the same thing
VVT changes cam timing only
vtech changes valve lift
first read then hell out of how the VVT system works. from what i've read so far its got some mechanical drivers as well as electrical. id think the system could eventually be rigged into a J (eco only) but only if the VVT system worked a very reliable manner every time a certian set of occurances hapened (a delta in RPM, TPS, load etc). then you can just tune acordingly. I have not yet had a chance to read more on the system. sorry I am not of more help.
first read what triggers a changing of the cams timing, and what does the triggering. look for links and post them in this thread. I will help if i can.
but to answer your initial questions I would say no, this cannot feasibly be adapted to work on the 2.4L TC
Sven you totally quarterloafed your computer..
The reason you can swap a VTEC head onto a non-VTEC Honda engine (I believe it's called the LS-VTEC or Mini-Me swap, but don't quote me) is because the heads are all standard sizes, bolts, etc etc etc. And since Honda simply energizes a solenoid above a certain RPM to activate the second cam profile, you can get an electronic device that simply watches the RPM signal and provides +12v to activate your new VTEC.
I think it's an interesting project and I'd love to see it done.
Oh one more thing: VTEC *does* change cam timing, or it can at least, because the high-rev cam profile doesn't have to be timed exactly as the low-rev one is. Secondly, even if VVT changes the cam timing you don't really need a new timing/fuel map - I know from my experience with a 1999 Jetta that people put in new camshafts and time them anywhere from 6 degrees advance or retard on a stock computer. So, although you could squeeze out a few more ponies from remapping it, it would stil generate more power. And if you have the funds/know-how to swap on this head, you'll be able to tune the maps with HPTuners.
I was happy when I heard my car ran 10s. Then I found out that was 0-60.
I am trying to find info about the electronic triggers for the VVT system on the 2.4 eco. HPT EIO has 2 programmable outputs that may suit the bill if indeed it is one trigger per cam (0-5v). much more info is required though before i say it is even feasible though.
Sven you totally quarterloafed your computer..
Vtech only swaps cam profiles via a extra lobe on the cam
IVtech , is the 1 that changes timing also
im not a honda guy , and i knew that
also here is a link to some info on it -
http://asia.vtec.net/article/k20a/
just because both engines are 2.4L doesnt make them the same, or close the being the same. Thats like thinking the 2.4L in the SRT-4 neons is the same as the LD9
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