The Official Superchips Forum

I just installed my Injen Intake and Injen Charge Pipe last night. BIG DIFFERENCE. Fuel trims hover around 0, and only fluctuate by 3-4 during WOT at most, and that is rare. AFR's stay in the 12's. Way more power increase. Of course I cant give real dyno numbers, so I wont even estimate. All I can say is it felt like I re-tuned it with a more aggressive tune. The downpipe and exhaust are still in waiting, but should be on shortly. If you can find them for as cheap as I did, I recommend it. It is worth it for the power and responsiveness. Plus it sounds like it is *h the front bumper in, which is an added bonus.

Did you get both the hot and cold side charge pipes ? Or does the Injen kit come with both? The piping on the cold side of the intercooler is decent from the factory but the pipe from the turbo to the cooler is terrible.

I have a ZZP catless downpipe and it works great with the SC tune.

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09 Cobalt SS/TC
Superchips Cortex
ZZP Catless Downpipe
13.47@106.5 W/crap 60'

The hot side only. I got it for 195 shipped. I still need to buy some t-bolts, since they only have worm clamps.

On a side note I just got my exhaust and downpipe finished today. The sound is crazy. It's too wet to go WOT on it so I cant tell you about my power increase. I do know on the wet road I lose traction in 3rd gear at 70MPH. This is with me starting in 3rd gear from a rolling 60. The exhaust leaves like nearly 3 inches above the cross member for when I drop it on H&R's, and the ZZP catless is awesome.

Once it is actually dry I can really tell the difference. I will dyno it once I get T-Bolts, since I think I have a tiny boost leak at the intercooler, although it could just be my car paranoia kicking in.

I take back my fuelk trim diagnosis. Long term is HORRIBLE. It's usually at about 12.5. I plan on modifying my intake with an air straightener, and relogging. Once I get DAQ up and running properly I will actually take a look at my logs through the entire RPM band. Just keeping everyone informed.

I was suprised to see your fuel trim's zero after the intake . I know alot of people have problems with them but i was hoping maybe something in the SC tune was helping out. There's not a lot of info on intakes and the SC tune for our car's so I was hoping 8(

My LTFT was -7 with just a K&N drop in and this tune .... put the stock filter back in and they would go back to 0 -1 .

I ended up cutting the elbow off the snorkel that goes down into the bumper and using the straight piece that was left over to go straight back into the air box. Now with that and the K&N the LTFT's are +/- 1-2 depending on the weather . These cars are finicky about air flow changes .


Oh and the catless DP is awesome .... I have my stock catback with it and love the sound .... quiet until you mash it .... then it give me a nice throaty (well as throaty as a 4cyl can be lol) exhaust note till i lift.

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09 Cobalt SS/TC
Superchips Cortex
ZZP Catless Downpipe
13.47@106.5 W/crap 60'

Yeh, I was hoping the SCT would be altered in our favor too. As of now my trims are -9. I removed the hydro shield. I was hoping the hydro shield would cut down turbulence, but all it did was skew my LTFT.I am going to try an experiment with my intake Friday. I have 3 ideas and the third involves me cutting it in a few areas. I refuse to give my intake up, lol.

In regards tpo catless, it seriously sounds badass. With the 3inch magnaflow, it sounds very deep. When you let off the exhaust it sounds like a beast gurgling acid, lol. I love having an open exhaust on a turbo car. No rasp at all, and at idle or coasting, it has a barely noticable deep tone. Mash the gas and it screams. Reminds me of my old srt4, and everyone knows the srt had the best 4 cylinder exhaust tone.

Update on the Injen Intake.

I have tried a few different combos, and none have been successful. I tried the following:

1. Injen Intake with Hydro Shield / -11.5 LTFT
2. Injen Intake without Hydro Shield / -9.5 to -10.5 LTFT
3. Injen Intake with screen at first bend before MAF / -10.5 to -11.5 LTFT
4. Injen intake with every possible hole taped up / -10.5 LTFT
5. Velocity stack at first bend before MAF / LOL...Would barely stay running (I may have gotten to aggressive on the stack opening, but I doubt it would work)

As of now the intake is unfortunately off the car...I will however try running a larger diameter stack at the filter and see if it helps...I imagine it will cut trims to -7 or so.

I am currently running stock air box with the ZZP mod I came across while surfing the web. Found it and a few other useful things on a Cobalt forum. I am not sure if I can name the forum, because of forum rules?

The compariosn between the 2 is below.

Injen

BAD : Low RPM's *h, WOT from idle was a no-go, LTFT dropped to -11.5, STFT @ WOT peaked at +20, Fuel Mileage seemed worse (maybe 1-2 MPG worse)

GOOD : More ponies, High RPM was kick *h (wheels would spin all the way through second, and into third), MAF readings as high as 36-37 lbs/min @6000 RPM, sounded awesome (like a deeper more aggressive non-annoying BOV, the only word I can use to describe is BEASTY), IAT readings were fairly close to ambient

Stock Box with MOD

BAD : High RPM's are normal again = less power, MAF readings top out at 31-32 @6000 RPM, sounds stockish again (no more WTF looks from ricers), IAT reading are between 2-3 degrees higher

GOOD : Low RPM's are normal again, smoother powerband, WOT from idle is definitely easier - NO BOGGING ANYMORE, LTFT drop to -1.5 but fall back to 0 to -.5 after a couple miles, STFT peak at +10 during WOT, Fuel mileage has improved

So in conclusion to folks using the SCT and want in intake...sleep on it, or get a personale tune for it. I did gain power up top, but it is not worth the driveability.

I know I said I would not give up my intake, but alas I have until I decide to tinker with it again. It becomes very frustrating when you have pulled your headlight, underpinning, and turbo inlet piping off over and over and over again just to get a damn intake to work. These cars are just too finicky when it comes to the MAF...plain and simple.

I will update again once I try the second velocity stack...I may even yank the fog lights out to. I will also be modifying the air box mod solid piping after the box. I realize some people are using the AEM coupler, but I have found all I need thorugh other means. I will keep everyone posted.

I did the ZZP air box mod with out the AEM elbow . People have been having trouble with the AEM elbow collapsing under higher boost loads . I guess it's *h the silicone elbow to a narrow opening . cobaltSS.net is a wealth of information.

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09 Cobalt SS/TC
Superchips Cortex
ZZP Catless Downpipe
13.47@106.5 W/crap 60'

I have heard that the AEM colapses easily. People just dont realize the kind of heat inside the engine bay, especially with the turbo heating up to. Heat + Silicone = FAIL. It's okay for couplers, but not for a nearly 2 foot piece of tubing.

I will more than likely scratch the whole Superchips/Injen idea. I am debating on either A. Selling my parts, trading the car. B. Selling my parts, buy new parts, Trifecta tune it/be a dealer, C. Keep my parts, Trifecta tune it/be a dealer.

All of my parts were sooo cheap, that even if I sell I should break even. I will most likely buy a CIA cold pipe with a MAF block off then tune the intake, with the MAF relocated. If I wanted to go HPT I would leave it as is. But with Vince being in another state, MAF relocation seems to be the best bet. I also need an IC...the stock one is great, but I have plans on tracking it soon. The intake is crucial for power on this car, IMO. 15-20 extra horsepower is worth it. I also believe that high 30's are capable in lbs/min if fog removal or venting is done.

The power bug has bitten me hard. I have been comparing cars ALL day today, and for the money this car is capable of SOOOO much power for less money than any other out right now. The SC tune is great, but DAQ still doesnt work for me, and this was a main reason for buying the Cortex. I would rather just have the power and buy a dashdaq or dashhawk, lol. With the advances Vince has made with fan control, fuel tables, RPM designated boost, switchblade option, and shear power, it's hard to say no, lol. Of course his 30 psi tune is stupid for us stock snal guys, but for large turbo or maybe even a compressor wheel upgraded k04, it seems pretty nice.