Do you guys have the same issue on the cold startup? Is there a way to tune for it?

listen to the vid you can here it flutter like crazy. it starts at :38 sec

I put the stock elbow back on for now.

http://www.youtube.com/watch?v=V2LNeq8upOY




AEM is aware of the problem and is sending me a revised elbow in a couple weeks

 

Nope I have tried everything I can think of to stop it to no avail. Tried cat heating cam changes, Timing changes on cold starts, different less restrictive filter. It is frustrating because the fact is my car is faster with the AEM on but driveability is crap with that silicone elbow on there. As soon as you remove the elbow the flutter stops but the stock elbow does not flow as well as the AEM elbow. I might see if I can get a shop to bend a replica of the AEM slicone elbow out of 3" exhaust tubing. It would have to get reduced down to ~2.5" at the turbo and flared to 3.25" at the AEM aluminum tube. I have already hacked mine up I might try cutting it and moving the MAF to the top and cut off the other bend. Might help make the airflow over the MAF less turbulent.

 

Damn!!! That sucks!!!

Terminator... You are the man!

 

Thanks.

 

Does it flutter with the elbow and the stock air box?

 

Yes

The elbow is the problem. I have the aem tube goin to the stock elbow and it's fine.

I'm not to far from AEM I'll contact them next week with the vid.

 

damn that thing is surging bad.

 

You should hear mine with the AEM on there. Mine is worse than that. It almost chokes off sometimes. As soon as you remove the silicone piece and put the stock plastic intake tube on the surging stops completely.

 

David, swing my AEM and see what they can do. I'm sure they did testing, wonder how they didn't catch it...

 

did they never do a cold start after designing the intake? lol

 

I will next week.

I don't think they test it in colder weather that's why.

 

I bet whoever tested the intake for them in the first place never reported it to AEM as an issue because they did not know how to recognize compressor choke/surge and that it is bad news for the turbo. They are redesigning the intake but apparently only the aluminum part which is not the biggest issue with the intakes design IMHO.

 

that is just rediculous

 

and if I'm parked outside it's even worse than that

 

Yep, that was the biggest complaint I had too, plus a nasty surge coming out of DFCO at light throttle.

Intake was fairly easy to tune for the MAF, a lot simpler than the Hahn is to tune, but the Hahn drivability is perfect once dialed in. No surge or flutter.

 

Sent an email to them with the vid attached hopefully they respond

They just responded so I guess they're gonna look into it

 

Is this the cause of my surge I have it at cold start up and when I driving high boost low boost I have the hks too

 

It's the AEM elbow try putting the stock elbow on but leave the tube and see if it makes a difference

another update they're gonna send me another elbow

 

What is the new elbow going to be made of? if it's the same its still going to flutter right?

 

well they're gonna send me a different one I'm not sure if it's the same or not.

 

I'm curious about this new elbow, keep us informed please!

 

I will

They called me up and they said a couple weeks for the new design

 

well i'm glad Summit is on back order for once, lol... i'll wait until this gets resolved

 

then were all gonna run out and buy it haha is it carb legal now btw?

 

It'll be a couple weeks that's what they told me

Yeah it's been carb legal