i have done n2o systems on my 62 impala, my 88 Beretta GT, and i going to prob do one on my 1993 Camaro. I know in the case of my camaro i have to tune the PCm to reset the timing back to normal when ithe n2o is on, going to use a switchable EPROM adapter. Anyway since the 2.4 has VVT is n20 a viable poweradder since the timing changes in the power band? Advanced timing + n2o = BOOM. I have found plenty of "universal" kits that would work, and since the motor is throttle by wire, a WOT switch should not be that hard to do. I was thinking a "mild" 50 -75 HP kit, i prefer wet systems in my experience, so actually a 50 HP wet would hit pretty good on that motor.
Anyone else pondering this?

I don't see the point because we have such a small weak little engine to begin with. Even if you sink tons of money into it and add forceded induction or nitrous you will still have a small 2.4 four cylinder. I'm going to stick to the old saying there is no replacement for displacement on this one. I lost all interest in modifying my HHR for performance other than maybe a CAI, exhaust, and retune. If I want power I'll work on my Malibu.

I don't think he asked if it was practical, I think he asked if it was do-able.
There's plenty of street legal 11 second 4 banger cars around, so the old saying of "no replacement for displacement" doesn't really hold up anymore.

Anyway, I would also like to know the answer to jaysz2893's question.

He asked if anyone else was thinking of doing the same thing he is thinking about. I pretty much answered no but I used more than one word. Street legal 11 second 4 cylinder. :lol: Maybe with more work than the car is worth! :p:

i have done n2o systems on my 62 impala, my 88 Beretta GT, and i going to prob do one on my 1993 Camaro. I know in the case of my camaro i have to tune the PCm to reset the timing back to normal when ithe n2o is on, going to use a switchable EPROM adapter. Anyway since the 2.4 has VVT is n20 a viable poweradder since the timing changes in the power band? Advanced timing + n2o = BOOM. I have found plenty of "universal" kits that would work, and since the motor is throttle by wire, a WOT switch should not be that hard to do. I was thinking a "mild" 50 -75 HP kit, i prefer wet systems in my experience, so actually a 50 HP wet would hit pretty good on that motor.
Anyone else pondering this?

I would say yes, before my cobalt got flooded, I sprayed it, althought it has a 10.1:1 compression ratio compared to the 2.4's 10.5:1 compression ratio. i never really had any problems, i did kinda use a slighty richer fuel jetting to make sure i didnt go lean. I dont really know much about the 2.4 motor although im sure it shouldn't be much of a hassle to spray it. I would say shoot a small shot such as 35 first to see if it detonate's under acceleration and if not go from there.

He asked if anyone else was thinking of doing the same thing he is thinking about. I pretty much answered no but I used more than one word.
OK, you got me. :p:
Street legal 11 second 4 cylinder. :lol: Maybe with more work than the car is worth! :p:
Depends who you ask. I used to think exactly the same way, but I have wised up over the years.

I would look at the NX kit from the SS 2.4 cobalt. Same motor, should be very similar application. Should fit fine with little modification.

I would look at the NX kit from the SS 2.4 cobalt. Same motor, should be very similar application. Should fit fine with little modification.
Well ill be damned, i didnt know the SS Cobalt had the VVT 2.4 as well. THanks for the Info.. now to price a system...

Well ill be damned, i didnt know the SS Cobalt had the VVT 2.4 as well. THanks for the Info.. now to price a system...
Uhhh.... it DOESN'T!!! :eek: Well... they do offer a 2.4L ECOTEC in SS trim, but the SS (SuperCharged) version is a 2.0L. I 'think' the 2.4L option in the Cobalt is new- and although the same platform - there have been differences noted.
Up until now... nothing out in the 'significant power adder' category for the 2.4L VVT to my knowledge. No boost, underhood/remote locate turbo- nor supercharge, NOR SPRAY. There have been a few of us watching a few manuf's such as Banks, etc... and wondering if anyone will attempt to boost the 2.4 :roll:... but no kits in any of these categories (yet).
Welcome to the waiting game. :thumb:

There are 2 Cobalts SS's a 2.4 with VVT and the 2.0 Supercharged versions.
I know NX was working on a 2.4 SS cobalt kit, maybe it fell through.:(
I know there is a 2.0 SS kit, my friend has one.:smile:

I had a 95 Honda Prelude with the 2.2 VTEC. Same principle of VVT on the 2.4 Ecotec. Never had ANY probs with that motor and it was also 10.5:1 comp. Ran a 50 shot wet for a while. Moved to a 75. then finally a 125 (after some minor mods). Nothing like racing down the track and being able to put the "squeeze" on your opponent when you need it! :lol:

...2.2 VTEC. Same principle of VVT on the 2.4 Ecotec....
Completely different.
vtec changes valve lift durration, and sometime on some vtec cars opens and closes an extra intake valve.
vvt changes timing, advances or retards timing up to 10 degrees using the cam shafts.

Both are done by oil pressure opperating cams. But that is the only place they are simular.

The HHR's Variable Valve Timing is done electronically using solenoids which are mounted in the top of the valve cover.

Just a FYI.

The ecu on the hhr would be able to recognize any amount of detonation/pre-ignition that may happen while spraying. This ecu has gm's high speed lan databus communication system. It has a baud rate(bit rate/ speed, whatever u know it as) of 500,000 kbs, which is just god awfully fast. So if there were to be any problems the ecu would see and make the necessary corrections to fuel trim/ timing advances and what not before any harm could be done. But odds are nobody here is gonna spray more than a 50/75 shot on a hhr, so its not like thats enough to actually hurt anything, unless u just completely abuse the spray. My 0.02 cent...use it wisely lol.