i was thinking pondering and what not. since the ecotec engine is like honda B series engine, i would wonder if you could adapt the 2.4 vvt head onto the 2.0 that way you get atleast some vvt action ontop of your Forced induction action. might yield to some more potential hp never know. isnt the solstice / sky turbo eco vvt as well? maybe just a head swap w/ that. just wondering and looking for possible hp increases ya know.

 

the 2.4vvt head isnt an aggressive vvt, not possitive, but I think it only has phasing on the exhaust side only

 

hmm i could have sworn it was both intake and exhaust.

 

Won't work because of the ECU. ECU controls VVT so you've either got the 2.0 ECU that can't control VVT or the 2.4 ECU that can control VVT, but doesn't handle boost. Don't know what other options would be out there.

 

thats why you have the hp tuners, i'm well aware you would need the 2.4 vvt ecu inorder to get the vvt to function properly, boost thats something completly different as a good tuner would beable to dyno tune the ecu for timing fuel etc to work well w/ the supercharger. tuning for the supercharger should be the least of the worries as a tuner can tune for it.

 

why is the title not related to the thread?

 

lol thinking the same thing!

 

Well, I'm just going by what's been going on with the people around me that have been trying to tune the 2.4 ECU alone for boost and it hasn't been working too well. Most of them are swapping out for the 2.0 ECU or going to a piggyback.

As you mentioned the GXP motor at first, that would be my choice. That, to me, would make the most sense since it comes pre-packaged to handle both boost AND comes with VVT. After seeing the tuning nightmares first-hand with the 2.4 ECU, I would look outside the Cobalt line into the Solstice/Sky realm if you REALLY want VVT.

 

There is one other way to use VVT without an ECU, but you would have to go through hell to set it up. It is a hand operated VVT lever that you engage when you enter a predetermined RPM. I know it sounds crazy but there is actually a Skyline that they set this up on and it made it's power down low when the VVT wasn't engaged and then gained something like 100 peak horsepower when it was engaged. I belive it was a setup with adjustable cam gears that could move between two points with a pull of a lever (It was setup with a cable attached to it.

This isn't practicle.

 

I'm sure you could rig up something simple with a solenoid controlled by a window switch (not the kind for your windows, but for nitrous) instead of a lever. That would make it more practical. However, for the gain I would say that there are better ways around it for the $$/time. That's my take on vvt.

 

imports always do head swaps and such vtech headswaps on ls integra's.

well the gxp would be slightly harder wouldnt it since its a rwd platform? so the ecu incorporates the rwd tranny, not sure if that would have n e thing to do with it. yeah i heard the 2.4 ss cobalt you have to reprogram the entire ecu inorder for it to work. i'm sure a shop that has been tuning for years would be able to and not just your average joe, might cost a lil bit more but i'm sure it could be done.

 

It's more a matter of the actual set up of the ECU. The people I know that have been trying it DO have YEARS of experience tuning. The one guy that's trying to boost his 2.4 has no more than 3 experienced tuners trying to get it to work with boost and it just won't. There's no "easy" work around for it. As far as the Solstice GXP's tranny, I don't think that would be a big deal at all, almost everything in the ECU relates to sensors. For a manual GXP, I don't even think that there would be that much to do with the ECU. I know on automatics, they handle all transmission-related functions through the TCM instead of the PCM (or ECU as it's been previously referred to).

If you do go 2.4 head, you're pretty much going to HAVE to use either a Piggy Back and 2.4 ECU or you're going to have to find a way to control VVT some other way.

Bottom line is it's NOT an import, and you can't mix and match heads jsut like that like you can on a Honda.

 

hmm interesting, good to know, i personally dont plan on it but just curious to see if n e ones considered it as an option for more potential hp.