Thoughts On All Intakes Currently Avaliable For the SS/TC
03-22-2010, 11:31 PM
#176
E-Mail From AEM
Okay everybody... my friend Mike has an SS/TC here in Houston and keeps trying to get an account on here but never can get his account okayed to post, so I'm posting his info he's been digging up for him. The following is an E-Mail reply from AEM about the current AEM intake issues:
Michael,
Some updates from R & D:
The updated pipes should cover all of the model years, a venturi was added . ETA for new pipes will follow.
There was no problem on the silicone elbow, it was more on the temporary weird surging sound during cold starts that was noticed.
Here’s the results from R & D:
We just had a Cobalt SS with the same issue. The AEM system allows much more air flow than stock so the compressor goes into surge during a point in start up when the recirculation valve is open (about 30 seconds) and causes the cyclic surge sound. The fact is that the OE elbow is restrictive in flow and keeps the TC out of surge at high idle when the recirculation valve opens. One of the things that the AEM system does is allow more flow, thus more power in the case of the turbocharged engine. We do realize that the noise is annoying are planning to do some experimenting to fully open the recirculation valve at cold start to eliminate the surge, we will keep you posted.
We apologize for the inconvenience.
Thank you,
Joji Luz
AEM Tech Support
800 992 3000 X 4524
Michael,
Some updates from R & D:
The updated pipes should cover all of the model years, a venturi was added . ETA for new pipes will follow.
There was no problem on the silicone elbow, it was more on the temporary weird surging sound during cold starts that was noticed.
Here’s the results from R & D:
We just had a Cobalt SS with the same issue. The AEM system allows much more air flow than stock so the compressor goes into surge during a point in start up when the recirculation valve is open (about 30 seconds) and causes the cyclic surge sound. The fact is that the OE elbow is restrictive in flow and keeps the TC out of surge at high idle when the recirculation valve opens. One of the things that the AEM system does is allow more flow, thus more power in the case of the turbocharged engine. We do realize that the noise is annoying are planning to do some experimenting to fully open the recirculation valve at cold start to eliminate the surge, we will keep you posted.
We apologize for the inconvenience.
Thank you,
Joji Luz
AEM Tech Support
800 992 3000 X 4524
03-23-2010, 09:11 AM
#177
Senior Member
Thread Starter
Okay everybody... my friend Mike has an SS/TC here in Houston and keeps trying to get an account on here but never can get his account okayed to post, so I'm posting his info he's been digging up for him. The following is an E-Mail reply from AEM about the current AEM intake issues:
Michael,
Some updates from R & D:
The updated pipes should cover all of the model years, a venturi was added . ETA for new pipes will follow.
There was no problem on the silicone elbow, it was more on the temporary weird surging sound during cold starts that was noticed.
Here’s the results from R & D:
We just had a Cobalt SS with the same issue. The AEM system allows much more air flow than stock so the compressor goes into surge during a point in start up when the recirculation valve is open (about 30 seconds) and causes the cyclic surge sound. The fact is that the OE elbow is restrictive in flow and keeps the TC out of surge at high idle when the recirculation valve opens. One of the things that the AEM system does is allow more flow, thus more power in the case of the turbocharged engine. We do realize that the noise is annoying are planning to do some experimenting to fully open the recirculation valve at cold start to eliminate the surge, we will keep you posted.
We apologize for the inconvenience.
Thank you,
Joji Luz
AEM Tech Support
800 992 3000 X 4524
Michael,
Some updates from R & D:
The updated pipes should cover all of the model years, a venturi was added . ETA for new pipes will follow.
There was no problem on the silicone elbow, it was more on the temporary weird surging sound during cold starts that was noticed.
Here’s the results from R & D:
We just had a Cobalt SS with the same issue. The AEM system allows much more air flow than stock so the compressor goes into surge during a point in start up when the recirculation valve is open (about 30 seconds) and causes the cyclic surge sound. The fact is that the OE elbow is restrictive in flow and keeps the TC out of surge at high idle when the recirculation valve opens. One of the things that the AEM system does is allow more flow, thus more power in the case of the turbocharged engine. We do realize that the noise is annoying are planning to do some experimenting to fully open the recirculation valve at cold start to eliminate the surge, we will keep you posted.
We apologize for the inconvenience.
Thank you,
Joji Luz
AEM Tech Support
800 992 3000 X 4524
03-23-2010, 09:54 AM
#178
Yeah, I couldn't understand how less restriction = surging either. All the same, this is their standpoint, and I was asked to post it. The person's contact info is on there too Term... 
03-23-2010, 09:56 AM
#179
Former Vendor
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I just tuned a car a weekend or 2 ago that had the AEM elbow on the stock airbox, I tried to squeeze it and bend it... wasn't happening! Maybe they updated it and he has a new one, but I really don't see that elbow being an issue. He had that cold start surge, check his posts, it's now gone 
Wasn't the coupler that we changed either 
Wasn't the coupler that we changed either
03-23-2010, 10:09 AM
#180
I used a piece of black foam pipe insulation stretegically trimmed to fit to cover the hole above the fog light. Made a small hat for it, cut tabs in the foam to 'plug' into the light housing & rtv'd that sucker in place. No shift in LTFT's from it and STFT's did appear a bit more stable on the highway. Should help keep the K&N cone dry. If we get a monsoon here, your litter box mod would be FTW. lol.
03-23-2010, 10:12 AM
#181
Senior Member
Thread Starter
I just tuned a car a weekend or 2 ago that had the AEM elbow on the stock airbox, I tried to squeeze it and bend it... wasn't happening! Maybe they updated it and he has a new one, but I really don't see that elbow being an issue. He had that cold start surge, check his posts, it's now gone Wasn't the coupler that we changed either
Wasn't the coupler that we changed either It does not collapse completely it vibrates as air passes into it. Even hooked to the stock airbox with the stock filter and stock MAF Tables the surging is still there. I delt with it for months. Even when the MAF tables were within 1% it still had the surging on cold starts and when letting off the throttle. Pulling timing helps a little but it is just a bandaid.
03-23-2010, 10:14 AM
#182
It does not collapse completely it vibrates as air passes into it. Even hooked to the stock airbox with the stock filter and stock MAF Tables the surging is still there. I delt with it for months. Even when the MAF tables were within 1% it still had the surging on cold starts and when letting off the throttle. Pulling timing helps a little but it is just a bandaid.
Hey, at least it wouldn't vibrate/collapse.
03-23-2010, 10:19 AM
#183
Former Vendor
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It does not collapse completely it vibrates as air passes into it. Even hooked to the stock airbox with the stock filter and stock MAF Tables the surging is still there. I delt with it for months. Even when the MAF tables were within 1% it still had the surging on cold starts and when letting off the throttle. Pulling timing helps a little but it is just a bandaid.
03-23-2010, 11:36 AM
#184
Senior Member
Thread Starter
Maybe but it takes a few key cycles for the cold start surge to come back normally. Right after a reflash it subsides.
Would be better than what they use now.
Would be better than what they use now.
Last edited by Terminator2; 03-23-2010 at 11:36 AM. Reason: Automerged Doublepost
03-23-2010, 11:51 AM
#187
Senior Member
Thread Starter
03-23-2010, 01:19 PM
#191
Senior Member
Thread Starter
03-23-2010, 08:23 PM
#192
Regarding compressor surge...what exactly does it sound like. Considering the size of the elbow piece on the HAHN and Injen, these most likely would not flex much under normal operation, correct? I personally have a Injen, and I can tell of a slight flutter noise when I let off the throttle after applying light throttle, but it honestly just sounds like the BPV closing like normal, but l do not hear this noise under WOT conditions. Any feedback?
Secondly, regarding air turbulence, if the MAF has a piece of FINE mesh placed/glued on the actual face of the maf, would this help with turbulence at all? Or would it be too close to really affect it? Granted if not proberly secure this could kill the turbo, but this could also help with LTFT. It would also not result in anyone cutting their intake. Just a thought...
Secondly, regarding air turbulence, if the MAF has a piece of FINE mesh placed/glued on the actual face of the maf, would this help with turbulence at all? Or would it be too close to really affect it? Granted if not proberly secure this could kill the turbo, but this could also help with LTFT. It would also not result in anyone cutting their intake. Just a thought...
03-23-2010, 09:02 PM
#193
some flutter
http://www.youtube.com/watch?v=VamebVaP0SI&NR=1
compressor surge
http://www.youtube.com/watch?v=nCj6Spwl1CU&feature=fvw
http://www.youtube.com/watch?v=VamebVaP0SI&NR=1
compressor surge
http://www.youtube.com/watch?v=nCj6Spwl1CU&feature=fvw
03-23-2010, 09:25 PM
#194
Yeh mine does not sound like the skyline at all. I think its just the BPV releasing after I press the gas...I hope. Any other signs, like boost gauge jump or anything else? I cant really distinguish the difference between flutter and usual BPV release, since it is so much louder now because of the intake. Again it only happens on very light throttle then release. Tap the gas and release then I hear the whoosh-oosh-oosh noise and its very sparatic as well. Thanks.
03-24-2010, 12:48 AM
#197
Regarding compressor surge...what exactly does it sound like. Considering the size of the elbow piece on the HAHN and Injen, these most likely would not flex much under normal operation, correct? I personally have a Injen, and I can tell of a slight flutter noise when I let off the throttle after applying light throttle, but it honestly just sounds like the BPV closing like normal, but l do not hear this noise under WOT conditions. Any feedback?
Secondly, regarding air turbulence, if the MAF has a piece of FINE mesh placed/glued on the actual face of the maf, would this help with turbulence at all? Or would it be too close to really affect it? Granted if not proberly secure this could kill the turbo, but this could also help with LTFT. It would also not result in anyone cutting their intake. Just a thought...
Secondly, regarding air turbulence, if the MAF has a piece of FINE mesh placed/glued on the actual face of the maf, would this help with turbulence at all? Or would it be too close to really affect it? Granted if not proberly secure this could kill the turbo, but this could also help with LTFT. It would also not result in anyone cutting their intake. Just a thought...
Mike and I are looking into the mesh idea. We got some mesh over the weekend and he fitted it yesterday. He's currently driving with it in place and waiting for somebody to log him.
03-24-2010, 12:55 AM
#199
I think with that revision and the venturi we may have something promising.
Last edited by Stamina; 03-24-2010 at 12:56 AM. Reason: Automerged Doublepost
