Fender fresh air vent

[NVW]

Well the white truck was done a couple years ago. I never had any problems. I still see the truck time to time and the owner said its still strong. This of course does not mean anything except that it "seems" to work. I have no data. I don't think it will affect IAT's, but do think it frees up air to the air filter. Whether it actually does anything at all, I don't know.

This is the whole point of R&D, if no one tried we would still have the PMD on the IP.:thumbsup:

 

[635]

Have you got a picture of your fender vent? It would be nice to see another app. On our trucks the intake/air box inlet inside the fender is a constant, so if you drive through water higher than it you could have problems. I never get off road in mine.

It wasn't the high water that did it it was the rain and wind. In coming tide, very high, high winds, and the creek flowing out very fast but being pushed in by the wind. The water in the creek was a little deep but not enough to get in the air filter, maybe just over the hubs. The sand was very soft too. NEVER get off road! It isn't a show truck is it? To me a 4X is to be used and used well, just not abused. I go just far enough so my dually fenders don't get busted up. But they have got some scratches.

When I got back to the motel I opened the hood. There was wet sand in the AFE box, on the filter, and water on the bottom of the AFE box.

Go to the Pilgramage section. Paul put some pictures of my pickup, with the fender vent, there.

 

[Burning oil]

It wasn't the high water that did it it was the rain and wind. In coming tide, very high, high winds, and the creek flowing out very fast but being pushed in by the wind. The water in the creek was a little deep but not enough to get in the air filter, maybe just over the hubs. The sand was very soft too. NEVER get off road! It isn't a show truck is it? To me a 4X is to be used and used well, just not abused. I go just far enough so my dually fenders don't get busted up. But they have got some scratches.

When I got back to the motel I opened the hood. There was wet sand in the AFE box, on the filter, and water on the bottom of the AFE box.

Go to the Pilgramage section. Paul put some pictures of my pickup, with the fender vent, there.

What is the "pilgramage section"? got a link?
Mine is a 2wd it will get stuck on wet grass
There always is a trade off, more air means less restriction, so if off road you want to make sure you have a good filter system

 

[NVW]

Have a look here leroy

http://www.thetruckstop.us/forum/showthread.php?t=21328

 

[Burning oil]

Looks good. I wonder how many people have done something simular.

 

[dangerousdave]

I'm more intrigued by the riveted on hood louvers. Where are they from?
I found some stainless scoops at a marine supply this week for $12 ea. think i'll get 2. more nostrils, both over the air cleaner. As rare as rain is here, I can duct tape them if it rains hard!

 

[Burning oil]

You lost me on the riveted hood louvers???

 

[Burning oil]

I was supposed to have the
"charge air temp" gauge today. Don't think its going to make it though.

 

[Paveltolz]

You lost me on the riveted hood louvers???

Pictures:thumbsup:

Originally designed to let the heat out through the hood and a side vent set up is available which I've installed.

635 has his mounted towards the back corners and you can see where I placed mine.

Regardless, our vents don't allow for heat or moisture to enter the AFE air box.

I had to block off the back of my AFE 'box' to ensure the heat went out the side vent and didn't cycle around and in.

Some Jeepsters have reversed the side vents to use as intakes for their airfilters but you'll have to go to raceace dot com as there are more than a thousand words involved here.):h

 

[NVW]

The black vents look good on your white truck Paul:thumbsup:

 

[Paveltolz]

Thanks, I was unsure and almost went with white units. Glad I didn't.

The company's owner sent me one set of everything to allow me to do some mock ups and decide what I wanted.

635's are the large size and mine are the XL's. Where he has his set up though, there's an optical illusion that makes them look larger.

I took his advice when I put mine in and 'swiss cheesed' the cross members to maximize the flow of heat out of the engine.

I should do a write up on a new thread and not continue to hi-jack this one. Sorry.

 

[Steve93mustanglx]

subscribing

 

[Burning oil]

I see, thought he was saying I had the luveres.
I Did get the Charge air temp gauge today. Now need to find time to install it.

Paveltolz, you can post away here. Your not hijacking, just adding to the conversation.

 

[bison]

I really do like this idea, but have concerns over high speed venturi affect, so that the airstream could cause a vacuum to the outside from inside the fender and you might lose some air flow to the filter. Of course would need some type of flow measurements to figure out that one.

My thoughts as well

 

[buddy]

Of course thats also why the cowl induction hood works and these louvres will work well on top of the hood to suck heat out. The fender vent is just a concern.

 

[chickenhunterbob]

GM "air flow around the engine" design was to route air through the rad, around the engine and out beneath, and reconfigured the belt driven accessories placing some emphasis on, or around the combustion chambers, and also,to not fog windows in cooler weather, as far as I know...

But if your test data proves otherwise, well by gummer yer smarter than they was...

 

[Paveltolz]

GM "air flow around the engine" design was to route air through the rad, around the engine and out beneath, and reconfigured the belt driven accessories placing some emphasis on, or around the combustion chambers, and also,to not fog windows in cooler weather, as far as I know...

But if your test data proves otherwise, well by gummer yer smarter than they was...

Dunno about smarter, but "I got a 3rd Grade Education in this here head...."

Initially I was concerned about the heat escaping from the louvers getting caught up in the flow in and around the base of the windshield and pulled into the cab. Happy to say that hasn't been the case as I've actually experienced cooler air coming in through the vents. Pleasant change.

Side vents on the fenders are simply added effect. Probably more form than function. I'll see what I can figure out short of lighting off a smoke bomb under it and idling the engine to see where it all comes out):h

I could get one of our units wind meters out of the drop zone kit, mount it inside the fender opening and see what the readings are. Of course there's the issue of manipulating the buttons or if the meter will store a peak reading or not without constant monitoring.

 

[great white]

It's more about areas of high and low pressure, which you could also call vacuum or the venturi effect in this case I suppose. It's pretty much the same thing in the greater scheme of it all.

When the air is flowing is past the vent (or anything of shape or void really), you end up with a low pressure area. The higher pressure air inside the fender (engine bay) will want to escape to the low pressure area. This is only a concern at highway speeds, around town isn't going to have enough of an effect to overcome intake pressure differential created by the retreating pistons in the engine.

Highway speed is hard to say because the amount of pressure drop created would need to be measured to know if it was great enough of an effect to have a negative impact on intake air available.

If there's a real concern or want to create airflow in to the intake using a fender duct, NACA is the way to go on the flat surface area. It negates the pressure drop by using the (relatively) sharp edges created by the duct to draw in the laminar flow air. the other way to go would be a "scoop" shape to reach up and "cram" air in to the duct. Neither is really much benefit on our relatively low speed vehicles, even at highway speeds.

Cowl induction works because the change in direction of airflow creates a high pressure area at the base of the windscreen. Essentially, the airflow "piles up" at the transition point before changing direction. By venting here, air can be forced (or Inducted if you prefer) into an intake. That's also why manufacturers put the cowl vent there to vent fresh air in to the cabin. It's high pressure and is forced into the vents.

As to air management around the engine....dunno. Been a long time since I dabbled that deeply in automotive theory and design, but it does sound familiar....

Just some stuff to think about from your resident jet propulsion guy.....

Cheers

 

[buddy]

Yeah, not talking about airflow in the engine bay, just where youre trying to suck air from the exterior to the intake. Dont want competing sucking.

 

[great white]

...Dont want competing sucking.

My mind just went somewhere completely different.....


):h