Cold air intake? - Ford Bronco Forum
 10Likes
  • 1 Post By sackman9975
  • 1 Post By Aaron's Mud E 1
  • 1 Post By CrazyBRONCOguy
  • 3 Post By miesk5
  • 1 Post By CDA 455
  • 2 Post By Mikey350
  • 1 Post By BikerPepe`
 
LinkBack Thread Tools Display Modes
post #1 of 16 (permalink) Old 03-15-2017, 07:18 PM Thread Starter
Registered User
 
Aaron's Mud E 1's Avatar
 
Join Date: Feb 2017
Location: Post Fall Id.
Posts: 2
Bronco Info: 90 FSB Custom. 302. known as Mud E1. 2 in level with an Aussie locker up front with manual hubs.
iTrader: (0)
Cold air intake?

First, I'm sorry if this has been asked and answered. I recently bought a 90 custom with a 302. I'm curious what kind of benefits I would really get by converting it to a cold air intake? The tricky part, maybe is the fact that the motor is from 03. Any recommendations or advice or tips or product recs.
Aaron's Mud E 1 is offline  
Sponsored Links
Advertisement
 
post #2 of 16 (permalink) Old 03-15-2017, 07:39 PM
Moderator
 
miesk5's Avatar
 
Join Date: Oct 2003
Location: NJ
Posts: 17,208
Bronco Info: 96 Bronco XL 5.0 E4OD, Man Xfer/Hubs
iTrader: (2)
Garage
Yo Aaron's Mud E 1,
Cooler intake air increases airflow by lowering airtemperature. As air gets colder, it gets denser, thus this air contains more oxygen within a smaller volume. More oxygen means more power Google it for more info.

Cheapest improvement is Air Tube & Box Insulation;
miesk5 Note; Ken used Reflectix Insulation, avail @ Lowes. etc. ST16025 - 16" x 25 feet. Ken installed the K&N & removed the cold air intake tube that runs to the top of the radiator; but he could have installed the intake tube section later. One pic for example:

See more pics @ 1994 Ford Bronco insulating air box and intake tube pictures, videos, and sounds | SuperMotors.net
Source: by Ken B (Kenny's 94)

...
Also see FOUR WHEELER Magazine's Project M.P.G..
Not a typical Bronco, but has some test info. Although not everyone agrees with their findings, sorta typical of drag racers, and others.

See my partially recovered Bronco web site ...Will need to clean up dead links & add many more new links some day. Thanks to Mr. Schwim!
THANKS to ALL WHO SERVE!
miesk5 is offline  
post #3 of 16 (permalink) Old 03-15-2017, 08:20 PM
~*~*~*~*~*~*~
 
sackman9975's Avatar
 
Join Date: Dec 2007
Location: The Mitten
Posts: 8,674
Bronco Info: 1995 XLT 5.8 with 97k miles, WARN Premium Hubs
iTrader: (48)
Garage
Welcome Aaron!

The motor is probably not from '03 rather rebuilt in '03.

Besides......I think someone here knows that truck! Lol

Cold air intake.. eeh. Don't waste your money.
beernut likes this.
sackman9975 is online now  
 
post #4 of 16 (permalink) Old 03-16-2017, 12:42 PM
Moderator
 
miesk5's Avatar
 
Join Date: Oct 2003
Location: NJ
Posts: 17,208
Bronco Info: 96 Bronco XL 5.0 E4OD, Man Xfer/Hubs
iTrader: (2)
Garage
Yo,
As sackman advised. I forgot to mention to install a stock air inlet atop radiator, tubing and filter box with the insulation. Get parts from a yard queen.

See my partially recovered Bronco web site ...Will need to clean up dead links & add many more new links some day. Thanks to Mr. Schwim!
THANKS to ALL WHO SERVE!
miesk5 is offline  
post #5 of 16 (permalink) Old 03-16-2017, 01:42 PM Thread Starter
Registered User
 
Aaron's Mud E 1's Avatar
 
Join Date: Feb 2017
Location: Post Fall Id.
Posts: 2
Bronco Info: 90 FSB Custom. 302. known as Mud E1. 2 in level with an Aussie locker up front with manual hubs.
iTrader: (0)
Turns out this truck is more than well known around here, lol. I love the truck that's for sure. Already replaced all shocks including the front aux. set that wasn't there and have a stabilizer on the way. Replaced a leaking pinion seal, trying to find a knock in the rear when I corner (any ideas).
I know the concepts of the cold air and why it's done. But who has done it and was it worth the gains and any recommendations on product?
BikerPepe` likes this.
Aaron's Mud E 1 is offline  
post #6 of 16 (permalink) Old 03-16-2017, 02:14 PM
Ford Hoarder
 
CrazyBRONCOguy's Avatar
 
Join Date: Apr 2004
Location: Franklin, Indiana
Posts: 5,030
Bronco Info: See Signature
iTrader: (20)
They are saying that the cold air intakes that a readily available for these trucks air actually not cold air intakes by design. They put an open air filter on the end of the intake tube inside the hot engine bay. So they are really warm air intakes.
The factory parts actually seal the air filter in and pull air form the radiator area. Either from the top, or right behind core support if you have the 460/4.9 air tube.
Most of the aftermarket ones are also not a very good choice for water and mud as they are so wide open under the hood.

If you are just running on the street and do not care, the air intakes available do seem to increase throttle response a little, but it also could just be a mind game by product of hearing the air being sucked in too. I do not think actually helps much, you would get similar gains putting a good filter in the stock box and insulating it. or making your own that draws air from inside a fender or the like, much like any performance oriented car would have. You could also create you own box to house a sizeable cone filter with a tube that draws form somewhere not in side the engine bay. This approach is not easy but I think would offer something.
Fast Floyd likes this.


The Street Queen: '92 Eddie Bauer- C6 Swap, Roller 357W 400hp/400ft-lbs, SCT Tuned, 4" Lift, 4.10's,
Go Fastish Build: '78 Custom- 4" Deaver Lift, Mild 460, Full Cage, 4.10's
Build Thread http://www.fullsizebronco.com/forum/...8-project.html
CrazyBRONCOguy is online now  
post #7 of 16 (permalink) Old 03-17-2017, 12:16 PM
Registered User
 
BigBlue 94's Avatar
 
Join Date: May 2006
Location: Hoyt, Kansas
Posts: 2,775
Bronco Info: 85 Bronco, 300 I6 w/4bbl, np435, 4" lift, 37" Irok NDs, 4.56 w/ Detroit Locker and tru trac
iTrader: (0)
Garage
Quote:
Originally Posted by Aaron's Mud E 1 View Post
Turns out this truck is more than well known around here, lol. I love the truck that's for sure. Already replaced all shocks including the front aux. set that wasn't there and have a stabilizer on the way. Replaced a leaking pinion seal, trying to find a knock in the rear when I corner (any ideas).
I know the concepts of the cold air and why it's done. But who has done it and was it worth the gains and any recommendations on product?
This 460/300i6 inlet tube is the only worth while upgrade, besides the aluminum heat shield posted above. It slides through an opening in the core support.


94 Bronco XLT. Beefy 351, 6" , 37's, 4.88: burnt
85 Bronco custom, 4" 37's, locked 4.56, 300 i6 4 bbl, np435/208
96 f350 XL, rclb, 351, c6, BW4407 xfer
78 f150 Ranger, 351m, t18, np205, rusty
90 f150, 95 f250, 96 f350 psd: stolen, sold, and burnt, respectively.
BigBlue 94 is online now  
post #8 of 16 (permalink) Old 03-17-2017, 01:35 PM
Moderator
 
miesk5's Avatar
 
Join Date: Oct 2003
Location: NJ
Posts: 17,208
Bronco Info: 96 Bronco XL 5.0 E4OD, Man Xfer/Hubs
iTrader: (2)
Garage
Quote:
Originally Posted by Aaron's Mud E 1 View Post
.... But who has done it and was it worth the gains and any recommendations on product?
Yo,
The results are in the FOUR WHEELER Magazine's Project M.P.G. link I posted. Here are the insulated box and tubing results;

See Results for #5
Read results narrative @
FOUR WHEELER Magazine's Project M.P.G.

But forget the K&N filter, box, etc and as CrazyBRONCOguy advised, use a quslity filter and moving inlet point-of-entry; such as Motorcraft; and consider another inlet path such as Fender Intake, K&N® w Stock Air Box info & pics in a 96 5.8
Source: by DNBELOWBRONCO (Kevin, Labor of Love) at 1996 Ford Bronco Stock intake/ K&N tube combo pictures, videos, and sounds | SuperMotors.net
Three 3 pics for example,



"Gas hose cut lengthwise to cover sharp edges while household window screen keeps debris out."
But iggie the K&N filter

Or consider a Snorkel:
Fabrication & Installation through fender in a 90: by 90Beater (Topher, Chris) at Tophers World Bronco Site

Fabrication & Installation through fender in a 90 5.0
Source: by votum at Home made Snorkel - Ford Bronco Forum
Also see pics by Kingfish on page 2
CDA 455, Fast Floyd and fodder like this.

See my partially recovered Bronco web site ...Will need to clean up dead links & add many more new links some day. Thanks to Mr. Schwim!
THANKS to ALL WHO SERVE!

Last edited by miesk5; 03-17-2017 at 01:40 PM. Reason: Changed pic url for votum's
miesk5 is offline  
post #9 of 16 (permalink) Old 03-17-2017, 03:45 PM
Ready 4 a Mid-Life Crisis
 
CDA 455's Avatar
 
Join Date: Aug 2008
Location: 43rd 'Gem' State
Posts: 656
Bronco Info: '94 Bronco, rebuilt E4OD (To PS specs), 33" BFGs.
iTrader: (0)
It's interesting you should bring that up.


During my racing days I used to use NACA ducts for intakes. I was thinking about putting one on the hood in front of the air box.



Do an airflow test on the hood to see how air flows (flow direction) over that part of the hood and then mount the NACA duct in the direction of the confirmed airflow direction.

Here's a pic of tufts on a vehicle during an airflow study:


μολὼν λαβέ
President Trump on building the wall:
"THIS IS WHERE WE HOLD THEM!!! THIS IS WHERE WE FIGHT!!! THIS IS WHERE THEY'RE DEPORTED!!!"
V.P.Pence:
BUILD THIS WALL, BOYS!!!
Fearless Indians:
Awe-Ooo!!!
CDA 455 is offline  
post #10 of 16 (permalink) Old 03-17-2017, 08:25 PM
FSM Lifetime
 
JohnMcD348's Avatar
 
Join Date: Mar 2009
Location: Lakeland, FL
Posts: 4,522
Bronco Info: 92 Factory Original 300 I6 M5OD Manual Custom. 3 seats, AC and a radio and all vinyl interior.
iTrader: (1)
Garage
Quote:
Originally Posted by CDA 455 View Post
It's interesting you should bring that up.

During my racing days I used to use NACA ducts for intakes. I was thinking about putting one on the hood in front of the air box.

Do an airflow test on the hood to see how air flows (flow direction) over that part of the hood and then mount the NACA duct in the direction of the confirmed airflow direction.

Here's a pic of tufts on a vehicle during an airflow study:

Question, if you might be able to answer it on that image.

Wouldn't the green area be a Low pressure area? I'm thinking of those lines in the same manner as a wing or foil where the pressue above the line would be lower, allowing the higher pressure below to lift it.

Am I wrong about what' s happening with the air flow on that vehicle or am I just looking at the wrong parts for results?

JTMcD.
We sleep Peaceful in our beds because Rough Men stand ready in the night to visit violence upon those who would do us harm............George Orwell
The object of life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways, totally worn out, shouting, 'Holy Shit, What a Ride!!! -- Mavis Leyrer

MY A/C Vacuum leak repair http://www.fullsizebronco.com/forum/23-technical-write-ups/175808-how-i-fixed-my-c-vac-leak.html
JohnMcD348 is online now  
post #11 of 16 (permalink) Old 03-18-2017, 11:49 PM
Ready 4 a Mid-Life Crisis
 
CDA 455's Avatar
 
Join Date: Aug 2008
Location: 43rd 'Gem' State
Posts: 656
Bronco Info: '94 Bronco, rebuilt E4OD (To PS specs), 33" BFGs.
iTrader: (0)
Quote:
Originally Posted by JohnMcD348 View Post
Question, if you might be able to answer it on that image.

Wouldn't the green area be a Low pressure area? I'm thinking of those lines in the same manner as a wing or foil where the pressue above the line would be lower, allowing the higher pressure below to lift it.

Am I wrong about what' s happening with the air flow on that vehicle or am I just looking at the wrong parts for results?
For an airfoil; yes, there is a low pressure area.


But the vehicle in question doesn't have an airfoil shape to take advantage of.

μολὼν λαβέ
President Trump on building the wall:
"THIS IS WHERE WE HOLD THEM!!! THIS IS WHERE WE FIGHT!!! THIS IS WHERE THEY'RE DEPORTED!!!"
V.P.Pence:
BUILD THIS WALL, BOYS!!!
Fearless Indians:
Awe-Ooo!!!
CDA 455 is offline  
post #12 of 16 (permalink) Old 03-20-2017, 12:25 PM
FSM Lifetime
 
JohnMcD348's Avatar
 
Join Date: Mar 2009
Location: Lakeland, FL
Posts: 4,522
Bronco Info: 92 Factory Original 300 I6 M5OD Manual Custom. 3 seats, AC and a radio and all vinyl interior.
iTrader: (1)
Garage
So then, the green area would be where you would install a ram intake?

JTMcD.
We sleep Peaceful in our beds because Rough Men stand ready in the night to visit violence upon those who would do us harm............George Orwell
The object of life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways, totally worn out, shouting, 'Holy Shit, What a Ride!!! -- Mavis Leyrer

MY A/C Vacuum leak repair http://www.fullsizebronco.com/forum/showthread.php?t=175808
JohnMcD348 is online now  
post #13 of 16 (permalink) Old 03-20-2017, 01:55 PM
Ready 4 a Mid-Life Crisis
 
CDA 455's Avatar
 
Join Date: Aug 2008
Location: 43rd 'Gem' State
Posts: 656
Bronco Info: '94 Bronco, rebuilt E4OD (To PS specs), 33" BFGs.
iTrader: (0)
Quote:
Originally Posted by JohnMcD348 View Post
So then, the green area would be where you would install a ram intake?
That; and the tufts that run along the upper side of the bonnet (Above the green circle).

Those are good airflow areas for a NACA duct.


Said NACA ducts scavenge air from the boundary layer which lies next to the surface. If you look close crucial air intakes are mounted with the opening several inches away from the surface due to boundary layer. Boundary layer is a layer of still air next to the surface. So designers and engineers design air scoop openings away from said surface.

Here's a pic of a P-51's supercharger intake:

JohnMcD348 likes this.

μολὼν λαβέ
President Trump on building the wall:
"THIS IS WHERE WE HOLD THEM!!! THIS IS WHERE WE FIGHT!!! THIS IS WHERE THEY'RE DEPORTED!!!"
V.P.Pence:
BUILD THIS WALL, BOYS!!!
Fearless Indians:
Awe-Ooo!!!
CDA 455 is offline  
post #14 of 16 (permalink) Old 03-20-2017, 10:55 PM
Registered User
 
Join Date: Nov 2009
Location: Redford, MI
Posts: 3,313
Bronco Info: '96 Black 302 XLT - '94 Green 351 E. B. both are E4OD, 3.55 axles, 31 10.50x15
iTrader: (3)
Quote:
Originally Posted by CDA 455 View Post
That; and the tufts that run along the upper side of the bonnet (Above the green circle).

Those are good airflow areas for a NACA duct.


Said NACA ducts scavenge air from the boundary layer which lies next to the surface. If you look close crucial air intakes are mounted with the opening several inches away from the surface due to boundary layer. Boundary layer is a layer of still air next to the surface. So designers and engineers design air scoop openings away from said surface.

Here's a pic of a P-51's supercharger intake:

That opening on the bottom is NOT the supercharger intake, it is the radiator (oil cooler).

JohnMcD348 and CDA 455 like this.

"The simplest solution is usually the best solution" - Occam's Razor

"The significant problems we face cannot be solved at the same level of thinking we were at when we created them." - Albert Einstein
Mikey350 is online now  
post #15 of 16 (permalink) Old 03-20-2017, 11:24 PM
Ready 4 a Mid-Life Crisis
 
CDA 455's Avatar
 
Join Date: Aug 2008
Location: 43rd 'Gem' State
Posts: 656
Bronco Info: '94 Bronco, rebuilt E4OD (To PS specs), 33" BFGs.
iTrader: (0)
Quote:
Originally Posted by Mikey350 View Post
That opening on the bottom is NOT the supercharger intake it is the radiator (oil cooler).

Thanks for correcting me. I got sidetracked and was thinking of the P-47 .


Regardless; the point stands regarding the boundary layer and intake design.

μολὼν λαβέ
President Trump on building the wall:
"THIS IS WHERE WE HOLD THEM!!! THIS IS WHERE WE FIGHT!!! THIS IS WHERE THEY'RE DEPORTED!!!"
V.P.Pence:
BUILD THIS WALL, BOYS!!!
Fearless Indians:
Awe-Ooo!!!
CDA 455 is offline  
post #16 of 16 (permalink) Old 03-27-2017, 03:50 PM
Harley's & Bronco's FTW!
 
BikerPepe`'s Avatar
 
Join Date: Feb 2003
Location: N.E. WA
Posts: 32,513
Bronco Info: '95 XLT, 5.8/E4OD/MassAir/6" lift/4.56's/35x12.5 BFG AT-KO2
iTrader: (4)
Garage
well I missed this thread somehow.

Aaron... you mention you're having a clunk or noise while turning? Are the front hubs locked when you're hearing this noise on turns? If the front hubs are locked, the Aussie locker is trying to engage but won't because the t-case isn't locked in. That causes the plates to clack together, making noise but not being able to engage. I generally left the front hubs in "Free" position, until I really needed to go into 4x. This was different than how I've used any previous Bronco over the years, w/out a locker in the front... which I would drive around most of the winter w/hubs locked and ready to engage 4x at a moments notice. It is one short-coming of the Aussie locker... but the flip side is, when you really need it, it's hard to beat the traction a locked front end will give you.

Aussie lockers are very noisy but it's not an indication of a real problem. Read the Aussie info pamphlet included in the booklet I gave you with the Bronco or check the info on their site. For a noise free locker... you'd have to look into spending some serious money for a air or electric lock type locker. The Aussie is the definitive "lunch-box" locker, cheap and noisy but strong and effective.


The motor in question will be the same as any other Ford Bronco 302 with a few exceptions. It was re-manufactured from the Engine Factory in '03. They did use different heads on it and those heads require different spark plugs. If you remove the plugs you have now... take note of the type before replacement. The PO before I bought it had the wrong plugs in it and they would barely seat properly, much less seal. The plugs recommended in Haynes manual were not the right ones either. With some help around here... we finally identified the heads and found the right plugs to use. I did so on the last tune-up and was much happier with the results.


As to the original question about the cold air intake... other than refining the stock setup, I've never really seen anything that impressive around here, like the guys are saying.
You could install hood vents and go with a open cone K&N but you'd still get some engine heat. I have considered that but I like the look and tend to think the added airflow would be great but with the weather in our area, I'd be seriously concerned about moisture on the engine (rain, puddle jumping, etc.) and that's why I never went there... well, that and I don't have money to waste.

A link to my SuperMotors account for your Bronco: 1990 Ford Bronco pictures, photos, videos, and sounds | SuperMotors.net
BigBlue 94 likes this.

"When life throws you a curve... LEAN INTO IT!"

SuperMotors - Since 2002
BikerPepe` is online now  
Reply

  Ford Bronco Forum > Bronco Discussions > Noobie Bronco Tech Questions. Flame free zone!

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Bronco Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself. DO NOT USE Gmail.com accounts. If you only have a Gmail.com email please contact the administrator here

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome