Oh yeah, that makes sense then.

 

Yeah, I tried like crazy to find someplace else for the reservoir so I could keep the airbox, but it just wasn't happening. There just isn't much room under our hoods.

I was pleasantly surprised, though, that there was no noticeable difference in performance. BTW, I used a dry filter, since the oiled ones can mess up the MAF.

 

Its too bad you couldn’t route it to outside air, your setup may flow better than stock, but basically what you’ve created is the famed “hot air” intake. Besides the obvious drawbacks of hot air being drawn in, the computer will pull significant timing at increased IAT’s.

 

Except that the IAT isn't significantly increased. And, like I mentioned, there is no perceptible loss of power. I thought about putting a small scoop on the hood so it could get fresh air, but I doubt it would make any difference.

 

Hmm... I would think that with the setup you’ve got, IAT would be up quite a bit.

I did some experimentation before I modified my stock airbox. “As stock” with my 2001 4.3 the IAT was typically 20 to 25 degrees above ambient.
I finally decided on insulting the upper radiator hose (which runs directly beneath the factory air intake tube), insulating the entire intake tract (including airbox), and modifying the stock airbox so it had a 4 inch diameter opening in the front (instead of the tiny horn) that was sealed so it took its feed directly through a modified opening in the radiator support panel, and thus outside air.

My end results are consistent IAT’s 4 to 6 degrees above ambient temperatures.

 

Billy, do you have any photo's of your intake set up ?

 

Yes, I took quite a few pictures when I was putting it together. Later on when I get a chance I’ll try to post them up in a separate how-to of my project

Edit, done:
https://blazerforum.com/forum/2nd-ge...-works-101088/

 

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}-->I agree with Jim. Most air filters need to be oiled well before they can perform correctly and to their full potential. If it's not oiled enough, I most certainly won't perform well. The oil's purpose is to prevent debris and dirt from passing through. Beaus of that, you need to remember to apply oil to the filter liberally. If you don't re-oil your performance filter, air impurities are probably going to enter your engine. Trust me. You don't want that. I had to pay a team of specialists a lot t fix it. Luckily, I knew the guys from https://www.socool.sg/why-is-your-ai...ripping-water/, and they gave me a lot of great tips.

 

Just a word of caution with the aftermarket oiled cloth filters. If not properly oiled and sometimes even when they are, the oil often contaminates the MAF sensor element over time. If you start getting some goofy engine performance/efficiency, check the MAF sensor and clean as necessary with a q-tip & some MAF cleaner (sensor safe carb cleaner).