I found the photos for ya guys.

Here is the Chevy intake modified to fit a 7.3/6.9 IDI (shown on a 6.9)


This is the Dual intake shown on a rebuilt 6.9

 

What makes you say that it won't give any more power? If the engine can breathe better, won't that result in more power?

 

Only if it needs more air.

I do like the looks of that second pic, even if it is overkill. Now if that engine had headers with 4 inch collectors and pipes and could turn 5500 rpm.

 

about the coregated pipe, it isnt as effective. go to a general aviation airport and buy aircraft ducting if you buy any ducting. the rippels in it make for an unsmooth surface. the aircraft grade is WAY more durable, smooth on the inside, nicer looking(not trashy-cheap) and will last longer.

DAVE 7.3 thanks for the pictures. i have a request though, do you have any pictures of the installation as the pipes go into the front of the truck?



dang, my idea was already snagged. hey, at least the idea was original, even though someone thought it up before me

well, hmmm.

can anyone tell me where he got that chevy intake bowl? i just want the bowl and not the piping and stuff.


looky here, why aren't any of us doing this?
http://cgi.ebay.com/ebaymotors/K-N-C...spagenameZWD1V

 

[QUOTE=2New2Fords] dang, my idea was already snagged. hey, at least the idea was original, even though someone thought it up before me


I know what you mean. All my best ideas were stolen by the ancients.

 

Wow, that looks great, I had the same set up on my 86, didn't look any thing like that, again GREAT JOB!! I have a 84 6.9 4x4 that I installed air and there's no room for the dual intake so I went with Dave S. style, works well but I'd love to have that, what do you get for milage by the way?

 

HUH?!? I thought you were one of the biggest proponents of adding a turbo?!? What would be the point - unless of course they need more air?




I like the looks of it too. I want to do the dual intake breather just like that, but use dual ram/scoop setups like this one of KJLYPW's


Lots easier to fabricate and no cutting of the radiator mounts....

 

I could not find any front pictures to go with that. That chevy intake is a good idea but I think it would draw in too much heated air. Cold Air > Hot Air

All you would really have to do is strip the factory circular housing down. Just leave the base and the topper and it would work. But again: Cold Air > Hot Air.

 

Can anyone with a higher knowledge confirm this? I did a little reading and now I'm starting to debate the idea...

 

Confirm what exactly? I'm not the guy with the higher knowledge you seek, but I'm curious about what exactly you are looking to confirm.

 

So bottom line is it really benefitial to add a ram air? My biggest concern is fuel economy unfortunantly. Gas prices have gone down but diesel is still 2.50 and this truck is my daily driver.

 

Post #22, in the second picture, that looks good. It is short, which mimimizes heat picked up in the engine compartment. It is direct, so if you are if you are going fast enough for any ram air effect to take place it is less impeded.

Also it's a nice job of fabbing up that fiberglass intake funnel.

 

I want something similar to that, except that I want to use a new cone filter that has a cone inside the top of the filter and completely trast the soup bowl. Does this sound reasonable?

 

I think you are asking about the cold air> hot air. well, heat aids in vaporization and mixing of the fuel and the air. if an engine were to run too cold it wouldn't have a good mixing of air and fuel. on the other hand no mater how cold or hot the air there is always 21% oxygen. I know this for a fact (two years of A&P school) well, the 21% oxygen is what helps the fuel burn. three things are needed for combustion, oxygen, ignition, and fuel. oxygen does not burn and it is not the fuel. this you can see in an oxyacetylene torch. the oxygen just supports combustion... the ignition comes from the massive pressure and temperature. pressure adiabatically increases temperature almost proportionally. pressure goes up, temp goes up to. our engines are high compression so we get a high pressure, which inturn gives a high temperature. then throw in fuel at 3000 psi at its flash point in the cylinder head and voila! you have combustion. the heat from combustion causes the 78% nitrogen and 1% other to expand at a very high pressure. this pressure (lets say 200 psi of force) pushes on a 15 square inch surface. (piston) this forces the piston down and you start your power stroke. well, then you have to push the exhaust out. the pressure pushing the exhaust out is decreased with an open exhaust. the piston goes up faster than the exhaust port allows air out and pushes back against the piston. this power lost by the exhaust scavenging is what robs the most power. faster the exhaust goes out, more power saved and put to the wheels.

well, now you know it all. back to the oxygen thing, the air is more dense(thicker) at a lower temperature. this causes it to weigh more and thus causes a higher atmostpheric pressure. 14.7 psi or 29.92 inhg at sealever on a standard day at 59 degrees. the colder you are the more air the atmosphere will push into your engine.

given your engine runs better on a colder day is a lay mans way of proving this. now the real question is, does it make a significant effect during your last two feet of the intake, well... it would seem so. basically I think the real gain in cool air intakes is the fact that they are bigger diameter than stock. i think size is more significant than temperature. ramair gives you a slight boost and assists the atmostphere in filling your engine. when your driving you have enough air going through your engine compartment to exhaust the hot air. I dont think you gain much if anything from the colder air. theoretically it would, and maybe it would if you took of from a stoplight on a warm day, but i think thats about it. in a gas engine, hotter air would produce detonation (why turbos need intercoolers)

colder air, more dense, =more oxygen and nitrogen

hotter air, less dense (even though texas air feels "thick") less oxygen and nitrogen.

if you had an enclosed engine compartment or an intake that rested on the exhaust then maybe it would effect it to run worse. if I had to guess I would say a cold air intake would benefit, but dont quote me.

i hope this answers your question, or gives enough info for you to make your own conclusion.

until then, the professor will be in his office.

jeremy

 

also, that dual intake setup looks like its on a 70's Ford.

does anyone know where you could buy a snorkel for our trucks? might as well.