It took me 8 HOURS to install my Rebel Auto Worx 3" intake, it was a pain in the ass to install and to fit. Even when it was fully installed, the two pieces of the intake are not totally aligned to each other. If there are not any air leaks, this is certainly only because of the rubber spacers. Last night I did a pull in 3rd gear and near the redline, my motor just stopped right away! And then saw the P00017 and the P00171 codes with my Interceptor gage (+ a check engine light) not so long after I restarted the engine.

I really dont know if this is because I am not able to make the tubes fit perfectly together and perfectly aligned. If the tubes are perfectly aligned, I have a huge bump on the fender wheel and this makes the wheel scratch the fender if I turn the steering wheel to the right. So the only manner to not have a huge bump on the fender is to unalign the 2 tubes by forcing the "tube connected to the air filter" toward the hood and attaching it with a hard steel wire.

Do you think that by doing that, this can screw the manner the air enter in my engine so as a result, screwing the air fuel ratio?

I really dont know what to do now, before I installed this intake, I never had this kind of problem!

 

do you have an 07? If so, did you bend the brake lines?

 

Yes I have the 07 model and I bent the brake lines but they would need to be bent even more. But at this point I'm affraid to brake the lines!

 

Any picture of this?

 

No unfortunately... but I plan to rework on my intake tomarrow. I then can take some pictures...

Oh and another question while I'm at it! My injectors pulse width are at 21.0ms at 6000 RPM. According to the formula I saw somewhere in this forum, this equals 105% of duty cycle. I ONLY have stage2 + this intake! So I'm not using a smaller pulley, I'm using the one supplied with the GM Stage 2. Do you think that something is wrong? I used the formula: inj. pulse width x RPM / 1200.

By the way is this formula good with ANY injectors??? Like if I had the 60 lbs injectors instead of the 42 lbs one, is the forumula to calculate injector duty cycle still good?

 

the GM tune runs rich as hell, normal for them to be maxed.

 

This thread helped me install mine... there are no pics, but it still helps:

https://www.cobaltss.net/forums/rebel-auto-worxs-146/rebel-3-intake-tips-89858/

 

Wow thank you! Im gonna try to do this today and following those steps!

The only thing I'm worried about now is the codes I got when I pulled my car up to redline when I was on the highway against a friend. The motor stopped like I said then I had to restart it while I was cruising!!! P00017 and P00171 are the codes I got from the Interceptor gage. With an IDC of 105% at 6000 RPM, does the motor run too lean with this intake at 7000 RPM?

Also is this forumula the same for the 60 lbs injectors as the 42 lbs injectors? Injector duty cycle = pulse width x RPM / 1200 ??????? Because the Interceptor gage don't give IDC but it gives injector pulse width. I will certainly have to start a new tread on this so more people who can know the answer can see this!

 

You want to worry less about IDC and more about the PW... you dont really need to convert anything...

 

ok... so when are you worried about the PW? Is there a certain value you know that the value means that the injectors are maxed out?

By the way I just put back the stock intake because I wanted to know by curiosity what would be my PW and the horepower reading. The interceptor gage told me that I reached 265 hp near the cut off with the R.A.W. intake and I get now 272 hp!!!!!!!!!!!!!! What the hell!! And I have now 20 ms of P.W at 6000 RPM with the stock instake instead of 21 ms at 6000 RPM with the R.A.W. intake! It seems like more air get into the engine with the R.A.W intake but I have less horsepower, this is what I don't understand. Less peak horesepower but better horepower all around in the midrange maybe?

What I did however when I installed back the stock intake is that I didnt screw the bottom of the box to see if it would whine louder and yes this is louder, but not as loud as with the R.A.W. intake.

 

Any answers about this? "You want to worry less about IDC and more about the PW... you dont really need to convert anything..."

How do you know that your PW are maxed out?

 

If im not mistaken its somewhere around 15-17ms where things get iffy.

 

How many damn beer brakes did you take..?? I installed my intake in 20 minutes max..??

 

Damn, I get 20ms with the R.A.W intake and 19ms with the stock instake (around 6000 RPM)

****, was that with the R.A.W. intake? I'm gonna do it this afternoon. I remove the headlight PLUS the fender...

 

damn my injectors are at 122% IDC but only 18.3ms on a 2.9 w/ gm stage 2

 

I noticed that this is on the s/c, but regardless, I removed my headlight and headlight bracket and it fits right in.. Injen.. Sounds like the RAW one is a piece if it takes you that damn long to do it.. It look me less time to manually put springs on..

 

don't shove the air filter all the way to the MAF sensor bung. just put it on enough to clamp onto the intake = smoother airflow.

I never had mine shut down on me and I drove the **** out of my car, GM stage 2 injectors and a 2.85 pulley.....don't really think injectors could be the issue.....

this isn't necessary, but it might help: did you disconnect your battery for at least 10 minutes? if not, try it so the ECU will re-learn the air/fuel mixture for the new volume of air it's now getting.

 

Very good advice for how to shove the air filter, this is what I did yesterday during the afternoon (yesterday because its literally 3:45 am here now that I'm writing). Thanxs for this!

This is the FIFTH TIME that I install this R.A.W. intake and don't tell me that its because I didnt try or I didnt see a manner for fitting this intake better! I tried ANYTHING you can imagine and guess what, in order to not have any buldge in the fender, I had TO USE A BUFFER to cut metal in order to push the intake more toward the front bumper. My intake was really not made to fit properly on a 2007 Cobalt SS/SC at all. I did all, even pushing the brake lines down, I did everything I could do before "buffing". It was more than a pain in the ass to install, fortunately we can feel the horsepower increase with it, fortunately!!!!

Everything fits great now and guess what, I had the idiot idea to clean my maf sensor with an air compressor!!! Guess what now, my car doesn't want to start now because I didnt think enough rapidly that I could litterally kill my MAF sensor by shooting large amount of air into it! Now Im really in the big deep ****! My car refuse to start because of me, I don't know if my dealer will want to give me a new MAF sensor without paying a dime (warranty), but I'm gonna try to make it like "I wanted to take my car for work and it refused to start"... Wish me luck!!!!

If not, do you know how much a MAF sensor does cost??? God daaaaaaamn!!

 

****, I'm coming back from the dealership and puting a new MAF sensor didnt resolve the problem!!! I was SO sure that this was my MAF sensor which was borked!!! Damn, my car just worked well before installing that intake! They think now that the problem is the PCM, they commanded a new one, but wow, why would this be that? Maybe I sliced a wire when I used the buffer? But I inspected all the wires and they seemed fine and I don't remember of having sliced a wire related to the MAF sensor... With the interceptor gage and the Tech2 as well, the MAF sensor indicated a fixed value when we tried to start the car. Something like 1.73 g/min or something like that, and that number stayed the same even if we gave more gaz. After we stop to give gaz, then the car just stalls!