thanks

 

You're welcome.

 

HP Tuner software allows you to adjust the timing aswell as fuel maps. This would be your best bet I think.

 

True but it's not available for the 2.4s, only the 2.0 SS/SC.

 

so when and how can we get the sc for the 2.4 and i fgiuriging it will be warranty

 

Unless GM makes a kit for the 2.4, it won't be warrantied. GM will warranty their work, say if you give them a supercharger and tell them to put it on but they won't warranty the actual parts or your motor if it blows.

 

hmm i really cant wait till sc comes out 7 psi will be fine gm if your listening i am wating

 

ooh i hope this rumor is true! haha

 

Screw waiting for GM...I waited almost two years for the 2.2 S/C kits to come out for the J-bodies. I saw them in the Cobalt with a 2.2 S/C before the Cobalt was even released (I have pictures at home to prove it was a 2.2, not a 2.0) back in 2004 @ the J-body Bash in Youngstown, OH in front of the GM plant. Then finally around when it's about to be released, I go to purchase it and my dealership was trying to rip me off. That's when I said **** it and went turbo lol.

 

whats so special about that though? don't all companies have some type of warranty on their parts?

or is it the fact that you can have warranty work done and not have to worry about them bitching about your supercharger?

 

well you dont have to worry about the risk of your engine blowing with an aftermarket company who could possibly not know what they are doing and have to replace it at your own expense..which will definately be pricey...and if anything gm does goes wrong..you are guarenteed a new engine plus s/c system

 

It all depends...

A company like hahn waranties individual parts...their manifold has a certain warranty, their turbo has a certain warranty. Now if you piece your own kit, same thing MIGHT apply. I have a friend who bought a Garrett turbo and didn't install it for months later...1200 miles on it and it went bad...had a warranty but it was only 30 days. Just stuff like that you gotta look out for.

 

check this scenario..with a supercharger runnin say 8 psi of boost on stock internals...say you went and bought forged internals or just some type of internals that would handle a **** load more power...once you install those..couldnt you crank up the boost level a bit...also if you did this wouldnt it definately be cable of making more poewr than a 2.0...that would most likely make the 2.4 a more powerful engine..just not as reliable..wouldnt it?

 

That depends if there is detonation/knock. If you get lower compression pistons, then you do it safer with less chances of detonation/knock.

 

If you have pistons that are lower in compression and are of high quality forge, than yes, you could turn it up ALOT actually. Wiseco pistons are rated around 500 HP. It all depends on tuning though...can't just crank up the boost.

 

sorry to hijack the thread, but will GM be producing a S/C for the 2.2L? With all this talk of one for the 2.4L, i'm hoping one will be produced for the 2.2 as well. The reason I'm not going with an aftermarket brand is because of the warranty. I know I can probably get more power out of an aftermarket, but if GM produces one i'm sure i'll be able to make enough power to make me happy and keep my warranty!

 

yea i know but i was sayin that the internals would be the major thing...tuning would be last..but still important

 

i think there already is one for a 2.2...not sure if it will work on the cobalts...it was designed for the j-bodies...but i dont see why it wouldnt work with some altercations

 

They go more hand and hand if anything.

 

Sunbird GT had a turbo until 1991 model year.

I do not see GM ever offering any type of forced induction for the 2.2 or 2.4 Ecotecs. The tranny is only rated to take slightly more than stock power and GM can't sell you something and then deny warranty for using it.

 

They have the same transmissions as in the J-bodies (well the automatics are 4T45E instead of 4T40E but close enough) and GM has a supercharger kit for them...

I don't know where people are getting this "the transmissions are weak" thing from.

 

No. You don't understand what compression ratio is!

GM lowered the compression on the 2.0L to reduce engine stress. Running a higher compression ratio on forced induction engines would increase the chanches of engine failure due to components being overstressed. Compression ratio does not affect how much boost your supercharger throws. The higher the compression ration, the more mechanical energy your engine can produce from the air/fuel mixture! It is the ratio of the volume of the cylinder at the bottom of a stroke in relation to the volume of air at the top of its stroke( i.e. a 10:1 ration compresses the air in the cylinder by 10X during a stroke). Boost is how much air you are adding to your air/fuel mixture by way of forced induction. A 2.0L engine with a 10:1 compression would make more power than a 2.0L engine running a 9:1 compression ratio if both were boosted with 10 Psi! Compression ration would make more power, not more boost!

That is exactly why the 2.4L won't make more power than the 2.0L supercharged. There is no way they can pump as much as 12.5 Psi into that engine and still offer a warranty. Also, it has no intercooler, so it will be recieving a hotter air mix as compared to the LSJ! At most I would expect GM to not offer more than 6 Psi. That combined with no intercooler (or aftercooler to be more precise) will not yield as much of a power gain as you expect! A 2.4L running 12.5 Psi of boost won't last very long compared to a 2.0L running 12.5 Psi of boost. Gm will not sell a supercharger kit that destroys 2.4L engines.

And how long has that getrag lasted for running 250 whp??? Just because it takes it for a few thousand miles doesn't mean it is going to last 20,000 miles! A clutch doesn't relieve stress on the transmission either! The transmission still has the same amount of power going through it whether it runs a carbon-ceramic clutch plate or a bannana-peel!

 

Yeah exactly. So is GM going to offer 12.5 lbs of boost on an engine with a 10.4:1 compression ratio???? No, because they will have to buy new engines for half of the people who buy the kit within a year!

I totally agree that a 2.4L running the same boost as us would make way more power (maybe 220-230 HP). GM will not offer 12.5 Psi of boost, nor will it have our aftercooler. As a result, power will not be much more, if any higher than an SS/SC! Read what I said!

Also, why would GM sell a supercharger kit that would make it cheaper to buy a 2.4L and add on the supercharger and result in a faster car than the more expensive SS/SC???? That would hurt SS/SC sales! That would be like GM offering the LS7 as a $5,000 crate motor, so you could build your garden variety Corvette into a Z06 for $10,000 less than buying a Z06! It is not going to happen.

And if I am wrong about any of this, than I will eat my words! GM is in financial sh#t right now. The last thing they need is to market an unreliable upgrade that is going to cost them lots of money!

The advantage to the LSJ is that unlike the 2.2L or 2.4L, it can reliably run 10-20 Psi of boost with no concerns of failure! That is why they lowered the compression ratio!

 

I agree with everything you're saying. I agree that even if they did offer a supercharger kit, they won't hook up the aftercooler...they didn't even do it for the J-bodies, it's a seperate purchase (costed my friend another grand!).

I could never get a straight answer about the transmission issue but what is so different between the transmissions in the 2.4 and the 2.0?

 

Actually, GM did somewhat do that as far as offering something faster than the SS/SC for cheaper and boosted when they made the s/c kits for the J-body platform. My friend has a base model Cavalier which weighs around 2600-2700 lbs, supercharged it w/an aftercooler. He bought his car (he got the greatest deal ever) brand new for about $4,000 (2005 Cavalier) and the Supercharger w/aftercooler costed him about $4,000. So right there, $8000 for a boosted Cavalier that weighs less and soon track providing, will be faster.

Of course this is talking about a totally different platform but I would say that they are still somewhat in competition as far as power wise if you're just all about going straight-line fast and not accessories and turning ability. Cobalt wise, I doubt they would ever do anything like that. Their answer to a s/c kit for the 2.2 or 2.4 would be "buy an SS/SC".