Sch 40 SS Headers

[kdogg85]

That's about what I figured, as big as these trucks are, the engine bay is tiny. Nontheless, they look as they should flow like crazy, super job man.

 

[patrickke]

Good work Andrew, these are going to be awesome

 

[motoxracer42]

Lookin' good. Out of curiosity, any reason for doing a common log over a tri y or 4-1? Space limitations maybe?

Honestly if you talk to most reputable header/ exhaust shops, they will tell you that a log style manifold is best for a diesel. They spool up better and since these trucks dont rev high, they dont create a big restriction. This is honestly why i like these along with craigs manifolds.

 

[bucky685]

Here are a few screen shots of the flow simulation I did of the header.

The first show the primary made out of a elbow into the collector, the second show straight pipes going into the collector.

The first model(which is how it was built) shows higher exhaust velocity at the exit of the header, and smoother (less trurbulant flow) that the second design.

 

[windrunner408]

I'd believe that.

 

[01PSD]

:whs: LOL

 

[kdogg85]

The sweeping primaries obviously make smoother transistion. Plus, where the main tube is larger than the primaries, you have a long collector. For sure an improvement.

 

[Worstenemy453]

Here are a few screen shots of the flow simulation I did of the header.

The first show the primary made out of a elbow into the collector, the second show straight pipes going into the collector.

The first model(which is how it was built) shows higher exhaust velocity at the exit of the header, and smoother (less trurbulant flow) that the second design.

Why are the scales different for the colors ?

 

[strokin'_tatsch]

Why are the scales different for the colors ?

Wondering the same thing.

 

[DBQLSC]

That I personally can't answer. We'll have to wait for super cadd guy to answer that one.oke:

 

[bucky685]

I forgot to change the scale between the two models.

 

[bucky685]

Here is a study on individual cylinders. Again this is just a computer flow study. (This is my interpration of the flow study)

Fist set is the elbow primarys. It appears to have less circulation (or dead flow) that he straight primarys, and higher exit velocity. I'm sure that the overlapping of the cylinders would take care of any exhaust recirculation that might happen.

Second set have straight primarys.

 

[DBQLSC]

And this is why Tim is awesome. Someone is getting a gold star on the board tomorrow.

 

[HeavyAssault]

Why are the scales different for the colors ?

They represent the velocity of flow in inches per second. The color changes as the velocity changes. It seems as the two different designs have different scales and they reflect a very close velocity rate for either design. Better get it done and tested real world to know for sure.

 

[Jwarren]

Ill try to get a photo of them installed. Should be on the truck tomorrow. 1st pull is just over 3 weeks. Running 300cc hybrids with these.

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[strokin6L]

Sweet...i'm sure it's gonna be whole different animal than last year Jess!

 

[Jwarren]

http://www.youtube.com/watch?v=Xd1GshmrTJ8&feature=youtube_gdata_player

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[bucky685]

Sounds great!!
Do you have any pictures of them installed?
How was the fitment of the headers?

Tim

 

[Jwarren]

Sounds great!!
Do you have any pictures of them installed?
How was the fitment of the headers?

Tim

Fitting was not bad. I got pics and details coming.

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[DBQLSC]

Just thought I would post up the videos of the headers in action. Pretty impressed with spool-up.

YouTube Video

YouTube Video