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AEM Intake Concerns/Questions

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Drain Plug Troubles

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First off I don't want to start a thread #@$%! AEM. Need some real information from other members first.



My questions are:



1. Do we know that the AEM Brute Force intake systems flows enough CFM at a low enough pressure drop for a Stock 3rd Gen?



2. What about a modified 3rd Gen and at what point is it not enough?



3. Is there any test data to prove these points?









First things first. I purchased the AEM Brute Force system from RPM outlet with the intention of replacing the stock airbox on a 05 six speed truck.



It would appear to be that the system was origionally designed for an 03 without the added insulation under the hood. Minor problem that just a little tweaking can fix.



I stated this fact in one of my phone conversations with AEM and they are aware of this :rolleyes: Why don't they fix it?



Anyway. Installed their system and took it for an intial test run and all appeared well. After putting around with it on the truck for about 20mi I opened the hood to re-tighten all of the bolts and noticed the filter minder was pulled down all the way into the red. Did some research on the forums and it seems that most came to the conclusion that it was the position of the filter minder. AEM said it was because of a Venturi effect across the opening of the orafice.



The Venturi effect is a special case of Bernoulli's principle, in the case of fluid or air flow through a tube or pipe with a constriction in it. The fluid must speed up in the restriction, reducing its pressure and producing a partial vacuum via the Bernoulli effect.



This doesn't make a whole lot of sense to me. I believe that to pull a filter minder into the red it takes a -6" vacuum. Does the Venturi effect account for that much of a pressure drop? I know that with an AFE drop in filter it would only pull down about 1/2 way.



So after that I put the TST box back on the truck. Set it at 0tq, 0hp, boost limit at 35lbs. Essentially I just used the digital guages so that I could see exactly what was happening.



Next test drive. It seemed to me that the turbo builds boost as fast or faster up to 20 lbs. After that it took more go pedal to get the same amount of boost as the stock air box above 20lbs. Changed back to the factory air box and verified this.



Most members seem to think that the AEM flows better than stock, but some have the same complaints that I do. Whats the answer?



I've got an aftermarket intake system sitting which is just sitting in the garage because I don't feel comfortable running it. :CRY: I'd hate to ruin a turbo because its starving for air and I don't want 250 dollars just sitting around. Either this intake system is fine for the truck and I'm paranoid or AEM needs to do something to fix this.



Let the games begin.
 
I have the AEM but now only use the Dryflow filter that came with it.

The filter flows @ 900CFMs. The stock is around 400CFMs. So it flows more than enough. Plus you have the advantage of a dry filter and no oil mess. That alone is worth it IMO.

The filter mider is next to useless next to the turbo. The turbo creates an incredible amount of suction in the tube. It was never intended to be mounted in air tube of the turbo. It was meant to measure the restriction inside of the factory air box once the filter started plugging up. I spoke to AEM, they said that most people wanted to retain the minder so added a space for it. So leave it in and forget it. The only other thing that you can do is purchase an outerwears filter (WR1875-1575-9T) and then you can remove the fron cover from the passenger side of the radiator in the warmer months. Should replace the cover for the winter months. Rain never effected the filter. Good luck
 
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I am in the process of ordering an outerwears cover for the filter, but before I spend any more money on this intake I'd like to find some answers. :p



After all of the recent posts regarding questions about air intakes/filters I can't believe that this post went to the wayside.
 
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