Cold Air Intake

[87silveradok20]

Do any of you have a cold air intake on your trucks? If so where did you get it?

 

[Skweegle89]

I think they are obtainable, but the best intake for your truck is the factory air cleaner. Far less restrictive than a pointy filter and a tube.


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[87silveradok20]

I think they are obtainable, but the best intake for your truck is the factory air cleaner. Far less restrictive than a pointy filter and a tube.


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I just wanna habe it look different than everybody else.

 

[rich weyand]

I just wanna habe it look different than everybody else.

Then why do you want to know what everyone else did?

Anyway, the simplest thing is to hook the snorkel end of the thermac air cleaner to the stock fitting in the stock location, between the battery and the radiator. There is a knockout in that location in the radiator bulkhead that accepts the factory fitting. My truck was without the thermac and the stock bulkhead fitting -- it had one of those two-chrome-pie-plate open-element things -- so I got both at the local salvage yard. For the hose I used a bendable 4" aluminum clothes dryer tube from the big-box hardware store.

Here is a write-up I did on another forum at the time, several years back. This is mostly about how to hook up a heat riser to the headers, but it shows the cold-air induction as well.

http://www.fullsizechevy.com/forum/...m/498719-induction-system-350cid-headers.html

 

[GTME94]

I already had a factory air cleaner but was missing the plastic cold air tube. I ordered one from LMC but it was too long. I scored one at a junkyard. My truck still had the plastic part on the radiator support.

Installing the cold air duct and installing the plastic front air dam piece helped me get about 1 mpg boost.

It definitely helps to get cooler air to the engine. In the car design business we call the intake air temperature increase "Rise over Ambient" and it is the 3rd biggest external factor in bringing down an engines performance after intake and exhaust restrictions.

 

[skysurfer]

I have to keep the TAC intact for emissions testing but a second snorkel was added for increased air flow.

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Some abs pipe attached to the core support in the lower left corner provides the secondary intake.

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[cobra20]

Yeah when I swap my LQ4 into my blazer I plan on making something like the factory intake that my suburban has