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Discussion Starter · #1 ·
Sorry if it's a stupid question but no one around here seems to know much about these. I'm trying to sort out the air intake on my truck that has had an engine transplant from a 5.0L efi to a 460 efi. Want to get rid of as much useless stuff as possible but am unsure what this does, can anyone help? (this pic is not my truck)

 

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If it has wires going to it, its the MAF sensor, or just left overs from the 5 liter if its not hooked up to anything. Hope this helps. But I could be wrong too.
 

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it is an air silencer, like the ones inside the fender of a 5.0. It does have a restriction in it that can be removed.
wayne
 

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Discussion Starter · #6 ·
There is no wires going to it but there is a hose the size of a heater hose going from the bottom of it to the intake manifold, I've had it off and there is no water in the hose. and it's just a single hose so maybe some sort of pollution devise?
 

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In a completely stock engine the silencers removal actually hurts torque.
As you upgrade cam, compression, exhaust, larger throttle body etc its removal is necessary.



:D
 

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The heater hose size hose on the bottom goes to the idle air control valve - you cannot remove or eliminate that hose - your engine will not idle. Hope this helps.
 

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Discussion Starter · #9 ·
The heater hose size hose on the bottom goes to the idle air control valve - you cannot remove or eliminate that hose - your engine will not idle. Hope this helps.
Thanks, I guess that means while I've got the factory efi system I'm stuck with it :(
 

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Not true. You can get rid of it completely. And yes your engine will still idle. However, your truck will whistle at idle and you will have unfiltered air entering your engine at idle. You can muffle the whistle by modifying a breather filter and placing it in place of the hose. If you do this you can replace the entire plastic piece with tubes increasing and smoothing your intake airflow. If you do not remove the hose I do recommend removing the silencers on the plastic piece. While it will increase power a bit it did nothing for my fuel mileage like others claim.

I went further and replaced my entire intake from the filter the the TB. I now have a '96 cobra TB, 4" intake tube, and an AEM filter. A little off topic but shows you can do a lot with the intake and factory EFI.

Sorry to dig this thread up, but I added my $.02 for future people looking for info.
 

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In a completely stock engine the silencers removal actually hurts torque.
As you upgrade cam, compression, exhaust, larger throttle body etc its removal is necessary.



:D
Are you absolutely sure, Scott???:rolleyes:
Ain't gonna help anything, might make the tubes resonate a little resulting in a "meaner" sounding intake pulsation.
 

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Are you absolutely sure, Scott???:rolleyes:
Ain't gonna help anything, might make the tubes resonate a little resulting in a "meaner" sounding intake pulsation.
Yes I am sure.
Both anecdotally on my own high cube dually and via chassis dyno testing.

The silencer horns increase velocity and help torque at lower speeds but hinder breathing a bit on the top side.


Definitely sound better with out...

By the way you do not remove the entire assembly you just cut off the horns and leave the rest so the IAB pick up hose can take filtered air from the intake tract.


:D
 
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