Cold air intakes
04-27-2008, 11:35 AM
#1
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Cold air intakes
I just put a cold air intake on my 07 cobalt ss/sc and my check engine light keeps going on and off with the same codes. Does anyone else have this problem and have any solutions? Thank you
04-27-2008, 11:59 AM
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Mine did the same after I installed my intake... I brought it in to the dealership 3 times and they were starting to get annoyed with me. I don't know what they did but it has now been 10 months and it's never came on again.
Doesn't the battery have to be unplugged during installation anyways??
Doesn't the battery have to be unplugged during installation anyways??
Last edited by AJH79; 04-27-2008 at 11:59 AM. Reason: Automerged Doublepost
09-19-2011, 12:01 AM
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Hey guys,
I just put in a K&N air filter in the airbox of my cobalt ss/sc. I read somewhere that some people actually left the bottom off or drilled holes in the airbox for more airflow. Any of this a good idea? I mean, a full intake would be best no?
I just put in a K&N air filter in the airbox of my cobalt ss/sc. I read somewhere that some people actually left the bottom off or drilled holes in the airbox for more airflow. Any of this a good idea? I mean, a full intake would be best no?
09-19-2011, 07:18 AM
#9
I used to have an Injen intake, but found my production intake with K&N & modified airbox actually flows more air.
Both tests performed on the same day, same temps (9/16/11, 68*F):
33.95 lbs/min of air with the Injen.
35.41 lbs/min of air with the modded production intake.
These cars come with a cold air intake from the factory that flows very well. I've finally learned that after testing numerous intakes (XTC, Rebel, AEM, Injen), and talking with John Powell. I'm also in the process of building my engine to Time Attack specs, and that car ran the production intake, modded airbox, and K&N filter.
Last edited by Staged07SS; 09-19-2011 at 03:17 PM.
09-19-2011, 06:11 PM
#10
That's my current setup....
I used to have an Injen intake, but found my production intake with K&N & modified airbox actually flows more air.
Both tests performed on the same day, same temps (9/16/11, 68*F):
33.95 lbs/min of air with the Injen.
35.41 lbs/min of air with the modded production intake.
These cars come with a cold air intake from the factory that flows very well. I've finally learned that after testing numerous intakes (XTC, Rebel, AEM, Injen), and talking with John Powell. I'm also in the process of building my engine to Time Attack specs, and that car ran the production intake, modded airbox, and K&N filter.
I used to have an Injen intake, but found my production intake with K&N & modified airbox actually flows more air.
Both tests performed on the same day, same temps (9/16/11, 68*F):
33.95 lbs/min of air with the Injen.
35.41 lbs/min of air with the modded production intake.
These cars come with a cold air intake from the factory that flows very well. I've finally learned that after testing numerous intakes (XTC, Rebel, AEM, Injen), and talking with John Powell. I'm also in the process of building my engine to Time Attack specs, and that car ran the production intake, modded airbox, and K&N filter.
09-19-2011, 06:21 PM
#11
It turns oblong at the bend (see photo of my intake). It gets wider to compensate for going narrower at the bend to reduce restriction. If you were to bend the tube into a cylindrical shape it would be pretty much the same diameter as the rest of the piping (I tried this on an extra intake tube I had laying around). AEM engineers tested a full cold air intake, and saw no further gains by replacing the upper portion of piping. The Time Attack car made almost 400whp (nitrous of course), and retained the factory intake piping.
I've tested many intakes on my car. None of them made any difference other than some changes in the whine of the blower. That's it. The restriction in the stock intake system is the paper filter. Replace that with a high flow unit, and you are set to go.
Last edited by Staged07SS; 09-19-2011 at 06:34 PM.
09-19-2011, 06:59 PM
#14
That's my current setup....
I used to have an Injen intake, but found my production intake with K&N & modified airbox actually flows more air.
Both tests performed on the same day, same temps (9/16/11, 68*F):
33.95 lbs/min of air with the Injen.
35.41 lbs/min of air with the modded production intake.
These cars come with a cold air intake from the factory that flows very well. I've finally learned that after testing numerous intakes (XTC, Rebel, AEM, Injen), and talking with John Powell. I'm also in the process of building my engine to Time Attack specs, and that car ran the production intake, modded airbox, and K&N filter.
I used to have an Injen intake, but found my production intake with K&N & modified airbox actually flows more air.
Both tests performed on the same day, same temps (9/16/11, 68*F):
33.95 lbs/min of air with the Injen.
35.41 lbs/min of air with the modded production intake.
These cars come with a cold air intake from the factory that flows very well. I've finally learned that after testing numerous intakes (XTC, Rebel, AEM, Injen), and talking with John Powell. I'm also in the process of building my engine to Time Attack specs, and that car ran the production intake, modded airbox, and K&N filter.
09-19-2011, 07:08 PM
#16
Thanks!
I measured the air flow on my interceptor.
I record all my logs in a little note book. I've been meaning to make an excel spread sheet to show some comparisons, but have been to busy. One day I will.
Nah.
He got retuned and such. He always had an intake. He just went from the Injen to ZZP.
I measured the air flow on my interceptor.
I record all my logs in a little note book. I've been meaning to make an excel spread sheet to show some comparisons, but have been to busy. One day I will.
He got retuned and such. He always had an intake. He just went from the Injen to ZZP.
Last edited by Staged07SS; 09-19-2011 at 07:18 PM. Reason: Automerged Doublepost
09-19-2011, 07:52 PM
#17
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i'm ditching my K&N for a ZZP CAI soon, all I can say when looking at a CAI is get one that does not sit on the damn bottom of the fenderwell..... I donated 1 motor to that little problem already....
09-19-2011, 09:03 PM
#19
I am tuned for the intake on my car right now.
I have always been tuned.
I said ULWiz retuned, but not just for an intake. He went from GMS2 to GMS3 then had BYT tune him further.
I have always been tuned.
I said ULWiz retuned, but not just for an intake. He went from GMS2 to GMS3 then had BYT tune him further.
Last edited by Staged07SS; 09-19-2011 at 09:09 PM.
09-19-2011, 09:50 PM
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Good info. Some the CAI (like K&N if I am not mistaken and please correct me if I am wrong) have a 2.5" dia. tube which is smaller than the stock tube diameter (at least when the stock intake is measured at the MAF location at 2.875" inside diameter). Another test that can be done is to measure the supercharger inlet pressure (vaccuum) with the Aeroforce Interceptor gauge; it will indicate about your intake & filter restriction. On my car (at 3500 ft altitude) the stock airbox with lower lid removed and K&N filter high flow filter is "only" restrictive for about 0.2 to 0.4 PSI at WOT (when boosting 12.5 PSI after supercharger) but we should do the same test for the full 3" dia. intakes to see if this vaccuum can be brought closer to zero.
Last edited by Jmc007; 09-19-2011 at 09:58 PM. Reason: Changed "pre-supercharger" to "supercharger inlet".
09-19-2011, 10:10 PM
#21
Good info. Some the CAI (like K&N if I am not mistaken and please correct me if I am wrong) have a 2.5" dia. tube which is smaller than the stock tube diameter (at least when the stock intake is measured at the MAF location at 2.875" inside diameter). Another test that can be done is to measure the supercharger inlet pressure (vaccuum) with the Aeroforce Interceptor gauge; it will indicate about your intake & filter restriction. On my car (at 3500 ft altitude) the stock airbox with lower lid removed and K&N filter high flow filter is "only" restrictive for about 0.2 to 0.4 PSI at WOT (when boosting 12.5 PSI after supercharger) but we should do the same test for the full 3" dia. intakes to see if this vaccuum can be brought closer to zero.
Stock is 3" (prob 2.9xx" something with digital calipers) at the MAF provision.
My Injen was 2.625" I.D. (2.75" O.D.) for most of the piping & 2.875" I.D. at the MAF provision.
I believe the K&N intake is around the same size as the Injen.
I ran that test as well man. I saw 0.1-0.2 PSI at WOT from 6900-7250rpm (hardly any restriction). Good test to perform.
I should have ran this test with my Injen intake, and all the other intakes I owned back in the day.
Last edited by Staged07SS; 09-20-2011 at 11:10 AM.
09-19-2011, 11:12 PM
#22
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You had no problems with leaving the bottom off the airbox?? Can the filter hold up without the bottom? If so, i'm going to try it. Does it make any difference for the sound or power?
09-20-2011, 12:18 AM
#24
https://www.cobaltss.net/forums/how-...fication-3890/
09-20-2011, 07:06 AM
#25
It is nice and clean looking.