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Topic Review (Newest First)
12-13-2012 12:56 PM
studeelover
Quote:
Originally Posted by DanielC View Post
Never mind the debate about the proper orientation of a NACA duct.


I wonder how much money Chip Foose gets from Magnaflow Mufflers, or how much more you have to pay for one, so they can pay Chip?
Totally agree with the first part.

About Chipp...I wonder if he gives a sheeeat about where and how the MM's are mounted.
12-13-2012 11:47 AM
MARTINSR
Quote:
Originally Posted by DanielC View Post
Never mind the debate about the proper orientation of a NACA duct.
Good tips about making a wire form frame.
Good tips about using fleece to form compound curves in a composite structure.
I like the tip about using unwaxed dental floss to pull the fabric in to a reverse crown.
Using the paper clamps to hold the fabric.

I wonder how much money Chip Foose gets from Magnaflow Mufflers, or how much more you have to pay for one, so they can pay Chip?
Yes, it really is an excellent how-to.

Brian
12-13-2012 11:28 AM
DanielC Never mind the debate about the proper orientation of a NACA duct.
Good tips about making a wire form frame.
Good tips about using fleece to form compound curves in a composite structure.
I like the tip about using unwaxed dental floss to pull the fabric in to a reverse crown.
Using the paper clamps to hold the fabric.

I wonder how much money Chip Foose gets from Magnaflow Mufflers, or how much more you have to pay for one, so they can pay Chip?
12-13-2012 08:07 AM
MARTINSR
Quote:
Originally Posted by Dragonoake View Post
The idea isn't all that new ... My buddy's 73 Grand Am had scoops like that
Yes, and they were mounted on a horizontal surface as they were designed for!

Brian

12-13-2012 02:21 AM
Dragonoake
Quote:
Originally Posted by gearheadslife View Post
enjoy
The idea isn't all that new ... My buddy's 73 Grand Am had scoops like that

Speaking of such things, he swore up and down it was an original SD-455 ...
I know there was a prototype SD-455 GTO, but I'm not aware of any making production.
Could you order that engine in anything other than a Firebird?
12-11-2012 01:21 PM
MARTINSR There is NO NASCAR truck with those scoops on the front bumper. But anyway, dead horse. The only shot I see of the bed is when he is talking and it's behind him, at that point it looks pretty good to me.

Brian
12-11-2012 01:07 PM
gearheadslife
Quote:
Originally Posted by MARTINSR View Post
Those scoops being put there is opinion, kinda like if you ran 10 inch wide rims in the front and 4" in the rear, just "opinion".

I am the kinda guy that even if they are free, they are wrong.

You can use free stuff, but it still has to be right.

Brian

but you see, I don't think they look wrong/bad where they are..
maybe I'v e seen to many nascar trucks..lol

did you see the hand formed bed side vents/scoop/brake ducts
12-11-2012 11:32 AM
MARTINSR Those scoops being put there is opinion, kinda like if you ran 10 inch wide rims in the front and 4" in the rear, just "opinion".

I am the kinda guy that even if they are free, they are wrong.

You can use free stuff, but it still has to be right.

Brian
12-11-2012 08:52 AM
gearheadslife the scoop being "wrong" is well an opinion.. and everyone has theirs
and once the truck is all black won't look so out of place..
as I'm sure it was a free bee part... and (my guess) was they asked for them from the vendor planning on use in the side scoops in the bed.. but they where scraped there and "needed" to give the vendor air time and the bumper became the spot..
as they pointed out those 2 scoops are 275 clams..
12-11-2012 08:20 AM
MARTINSR
Quote:
Originally Posted by gearheadslife View Post
if your so hung up on the "wrong" duct that they used because they want to also get the import crowd.. you missed the forming of the bumper from NOTHING.. a DIY project, instead of a "open catolog and order it"
sad , cause this truck is a ground up build that most likely will smoke most of our junk.. and they are showing how to build one.. as a diy and cheap..
Like I said, I only watched a little bit and that hit me as stupid, and I still feel that way, those scoops are wrong, period.

But I just watched more of the video and you are absolutely right! The "How to" on that video is EXCELLENT!!!

I mean EXCELLENT!!!! That is more like the show we have been talking about, a REAL how to!

Brian
12-11-2012 06:31 AM
gearheadslife if your so hung up on the "wrong" duct that they used because they want to also get the import crowd.. you missed the forming of the bumper from NOTHING.. a DIY project, instead of a "open catolog and order it"
sad , cause this truck is a ground up build that most likely will smoke most of our junk.. and they are showing how to build one.. as a diy and cheap..
12-10-2012 08:10 PM
Valkyrie5.7 Brian couldn't have been more right. Not only are those NACA ducts not designed for front air, but they so wrong on the front of that truck. Been a while since I watched these silly tv builder shows though... Are they trying to attract the Honda crowd? The goofy voice of the announcer, music and everything got me about 22 seconds into the video. No thanks.
12-10-2012 07:59 PM
MARTINSR Nope, the scoops he put there are designed for the top or side surfaces.

These submerged ducts are called NACA ducts. They were invented by NACA, the agency that later became NASA as a high pressure and low drag scoop. The NACA ducts are located in the belly pan right before the rear diffuser and they take in air to keep the lower part of the engine compartment, where the exhaust system is cool even though it is completely covered by the lower diffuser. This keeps things in the engine compartment from getting hot and cooking off.





A little more on the design. http://revlimiter.net/mods/duct.php

Brian
12-10-2012 07:59 PM
sedanbob I also noticed that all except the last one of your pictures the opening starts wide - that's because of it's placement on bumper means most of the air entering that scoop is coming from straight forward. The long narrow taper is important when the scoop is perpendicular to the airflow. The other scoops you pictured look appropriate for a front bumper installation. Just my opinion.
12-10-2012 05:48 PM
gearheadslife




notice they all are formed so the air going from center to the side of the bumper the inlet starts to guide the air in as it passes over the rounded bumper forcing the air from center to the vehicle sides..
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