The truth is out there

[Yatzee]

Have we been hood winked for the last 50 years regarding header performance? Watch this and you be the judge.

 

[commando1]

Others may have been.
I never was.
The cross section AREA doesn't change.

How much did Amsoil pay for the plug

 

[azblackhemi]

I thought this was gonna be a thread about the new X Files shows.

 

[Yatzee]

Others may have been.
I never was.
The cross section AREA doesn't change.

How much did Amsoil pay for the plug

 

[Yatzee]

Actually, you couldn't be more wrong if you tried. If you oval, square or diamond the pipe, the area of the crossection remains the same. On the other hand if you collapse the wall in a dented in fashion it doesn't remain the same. Grab your left over paper roll from the washroom toilet paper and experiment a bit - you'll see what I mean. The reason for the lack of flow restriction is simply because as you decrease the cross section area the gases speed up but the back pressure remains the same.

 

[commando1]

Well, when you look at it that way...
Lol. You're right

 

[BigCRig]

can't believe they bent em up still on the motor!

 

[Alchemi]

OR maybe those headers were TOO BIG to start with.....

A good follow up would be with some pipes 1/8 smaller

There are plenty of headers out there that only really help the top 1000 of an rpm range that the owner dosent drive in....