Cold air intake through hood?

[dremu]

After watching underhood temperatures vs ambient, I'm sold on the idea of getting cold air into the air cleaner. And I'm switching to the newer style air cleaner, as mine might be a bit restrictive:

Yeah, yeah, it's not restrictive with the top off.

Soo ... the question becomes one of finding somewhere to route a 3-4" duct to up on the grille, and the 73-80 grille does not lend itself well to this. Plus I've loaded a bunch of crap up there already, auxiliary battery bank, tranny cooler, etc etc.

I could do the full-on snorkel thing and run the duct out the side... but it's kinda silly. I mean, my ignition isn't waterproofed etc etc, so I have no intention of getting nads-deep in water, *and* the snorkels I've seen are kinda exposed and prone to breakage, and I can't see the passenger side of the truck anyway so I'm sure the first time I lay that side on anything I'd rip the snorkel right off.

So I'm thinking, how about some flexible tubing under the hood, and just pop a PVC 90* right at the hood level? Ghetto, I know, or seriously Home-Despot-Redneck-101, but from mocking it up it doesn't look like it'd block visibility much, if at all... and it would be the easiest, shortest path to get outside air in.

Assuming that the air over the hood is moving some, i.e. the truck isn't stationary, and therefore is cooler than in the engine compartment. Whatchall think?

And yeah, I'd be cutting a hole in the hood, but I have two more out back if I decide it's stupid. (You Might Be A Chevy Truck Nut If ... you have spare hoods, "just in case." )


-- A

 

[dyeager535]

Theres no room to stick the 81+ snorkel "adapter" in the core support?

I've not dealt much with the '73-80, so I can't picture the backside of the core support, nor behind the grille, if there is enough room to fit the snorkel adapter "hat". (which I'd cut off if too tall)

Your '85 is setup like that I assume, so I also assume you compared and couldn't see a way to do it?

 

[dremu]

Theres no room to stick the 81+ snorkel "adapter" in the core support?

I've not dealt much with the '73-80, so I can't picture the backside of the core support, nor behind the grille, if there is enough room to fit the snorkel adapter "hat". (which I'd cut off if too tall)

Your '85 is setup like that I assume, so I also assume you compared and couldn't see a way to do it?

The '85 is a CUCV, so it's diesel *and* goofy military, so it's got no plumbing 'tall. It may have been removed as the truck had cold-weather gear installed, including a hole on the right side for the external gas-powered heater Just went and looked, and the ~4" round knockout behind the battery is still intact, leading me to believe that the air cleaner was never plumbed to outside air.

Anyway, the core support front is the problem, as there are ~1" square reinforcements on each side of the radiator, right where I'd wanna center the holes. Grrr. Never mind the overflow bottle, and the aforementioned aux batteries, etc etc.

I just don't see ducting going up there easily.

-- A

 

[big83chevy4x4]

the way i was gonna run something is in the cowl to the pass side. somewhat of a hat type thing like some of the older big military trucks have, just not giganto. i havn't figured it all out yet, still need to get it running first.

 

[dremu]

the way i was gonna run something is in the cowl to the pass side. somewhat of a hat type thing like some of the older big military trucks have, just not giganto. i havn't figured it all out yet, still need to get it running first.

Yeah, the 81+ style lends itself better to that. I know the "hat" style you mean -- the USMC puts 'em on the HMMWV's too, though they look silly for it. My biggest gripe at that point would be the loss of visibility.

I *could* remove the air box and go with a heater-core only ... but that's WORK, grrr. And I hate heater cores!

So many ideas...

-- A

 

[4X4HIGH]

Aaron, the piece i have for you goes into the hole you have with a delete plate still there. Once you remove that plate this is held on with a sheet metal screw and then the ducting to the air cleaner attaches to it. There is basically nothing that protrudes through the core support in front of the core support

 

[Big Blzn]

What about this: Do a dual snorkel like this pic below that I attach. Then take your turn signals out of their stock location just below the headlights and put the turn signals in the bumpers like the first gens have and then put the snorkel end with a rectangular shape into the old turn signal hole. I think that would be great and since you don't get nuts deep in H20 then you should be fine. Now let me find that pick. Plus, if we all had GMC we could use the inner headlight holes to do this easy.

 

[dremu]

Aaron, the piece i have for you goes into the hole you have with a delete plate still there. Once you remove that plate this is held on with a sheet metal screw and then the ducting to the air cleaner attaches to it. There is basically nothing that protrudes through the core support in front of the core support

Well, that'd work for the '85, then ... I won't ask you if cold air is good for diesels ... but in this instance I'm whining about the '74.

I may swing out your way in the next coupla days, hit up the PnP for an AC-less heatercore box, and if so I'll bring that timing cover down. If you think of it, stick that plastic piece in your truck?

-- A

 

[dremu]

Seen those, yeah. I'm prolly gonna go dual snorkle on my big block, which is an entirely other ball of wax ... but I can't find anywhere to run ONE tube on this truck, never mind two.

Maybe a hood scoop is in order [kidding!]

-- A

 

[4X4HIGH]

Aaron, this piece i have came off the early trucks such as the 74

 

[Jishory]

i have cold air intake when i remove my hood, bam

 

[dremu]

Well, crap.

I'ma gonna swing by, then, and see what this thing is 'fore I go cutting anything. So my '74 has a delete plate? Where, behind the passenger side battery?

-- A