First time header build

[MadBill]

Do we get pix after the whole world has seen it in Tulsa?

[mk e]

I am always SOOO jealous when I see the "legos" ! ....but I just don't make header often enough to just justify the purchase in my mind

Tig ONLY! for me as well.

I use noodles with an 1/8" aluminum welding rods stuffed inside then makes cardboard template or the inside radius of the various bends available in the tubing size I'm planing on , and use the template to get the noodles close to something real. No where near as nice as the logos, but functional. McMaster has a crazy selection of noodles so I can generally find something close in OD to what I plan to use.....then the kids have a ball chopping them to bits when I'm done.

If you are willing to buy the materials from Burns, they have a great design service. I've used it on the last couple sets and been very happy. Pipemax also spits out pretty good numbers but you need to know what you want, Burns tells you what they believe is optimal for your application. I've never built both versions and compared, but dynomation5 has preferred the Burns design to the PipeMax design the couple times I'v'e run the comparison.....but whether or not that means anyhting I don't know.

[Cubic_Cleveland]

Man those V12 headers must have taken some time! Especially to fit them in the engine bay of that Ferrari!

[mk e]

Man those V12 headers must have taken some time! Especially to fit them in the engine bay of that Ferrari!

They did but mostly because there were 12 tubes to make....50 or 60 hours I guess but as I said I always several years in between sets for me so I'm sure some one like "proheader" who does it all the time would make WAY shorter work of it.

Figuring out how to get the tubes into a tight spot goes pretty quick with the noodle method....you can just push things around until it all fits, then I kind of tape it together and start bending the noodles into real radii....then replace the noodles 1 tube at a time.

I think even if I had the ICE set I'd still probably rough things out with noodles first but I can only imagine how much time the ICE set saves once you have an idea what you want to make.

For me the bugger always is when collectors endup part of a bend , I've never figured out an easy way to handle that....yuck!

[af2]

This shyt makes me sick!!!!!!!!!!!

https://www.google.com/search?q=weldpor ... B306%3B306

[mk e]

This shyt makes me sick!!!!!!!!!!!

https://www.google.com/search?q=weldpor ... B306%3B306

Those are some pretty welds.....I have never been able to do anyhitng like that

[af2]

This shyt makes me sick!!!!!!!!!!!

https://www.google.com/search?q=weldpor ... B306%3B306

Those are some pretty welds.....I have never been able to do anyhitng like that

No kidding!!!!!!!!!!!

I will say your welds are just fine!!!

[proheader]

Do we get pix after the whole world has seen it in Tulsa?

Sure. Will,post a pic or two when finished..... Couple weeks is all I got left to get it up and rolling....

By the way, plenty of great header builders out there. I just want to learn from some of you guys and get better at this header thing....

[exhausted]

131218 Ferrari V12 (1).jpg

Not sure I want to do one of these again....

[proheader]

snake tubes again!!!!

[MadBill]

2X.
Goodness, gracious, snakes alive!

[900HP]

I bet that sounds out of this world beautiful, it certainly LOOKS out of this world beautiful.

[exhausted]

Ferrari Tailpipes (7).jpg

Nostalgia racers have some bucks so we tried two different tail pipe setups.
The x-pipe with duals ran better and looked like the original stuff.

I never heard it.

FerrariDaytona-3.jpg

Stuff I replaced were sand bent and 3 or 4 of the pipes off the head were unbelievably tight radius. Easy to make more power...

FerrariDaytona-2.jpg

impressive car to say the least...

[900HP]

Calvin, when you are welding 304 what are you using for filler rod? Are you using a 308 or 309 rod or are you using SiB? Do you use a gas lens? How large of a lens and how much gas flow?

I'm assuming .030" filler rod and very low amperage settings too. I wish I could weld like that.

[900HP]

I copied this from the "burr finish" discussion as we have moved into the exhaust ports now. I believe this applies DIRECTLY to header design ----

Postby David Redszus » Wed Dec 10, 2014 9:16 pm

We have often heard about keeping exhaust pipes hot. But why?
Consider the following:
a pressure drop of 1 psi or a pressure ratio of .9319.

inlet and outlet temperatures of 80F/80F
results in
sonic velocity = 1058ft/s
particle velocity = 48.2 ft/s
mass flow = 2.16 lbs/min

inlet and outlet temperatures of 1800F/1800F
results in
sonic velocity = 2165ft/s
particle velocity = 98.7 ft/s
mass flow = 1.056 lbs/min

inlet and outlet temperatures of 1800F/1200F
results in
sonic velocity = 1855ft/s
particle velocity = 84.62 ft/s
mass flow = 1.232 lbs/min

An increase in exhaust gas temperature does increase sonic velocity of pressure waves and particle velocity but it reduces mass flow due to reduced air density.

A reduced exhaust pipe tip temperature results in lower sonic velocity, lower particle velocity but an increase in mass flow rate. What you see is not always what you get.

Surface roughness, particularly in the exhaust pipe due to rust or carbon, will increase the friction factor. At higher velocities (and higher Reynolds numbers) roughness will increase flow friction especially in the pipe bend areas.

To improve exhaust gas flow keep the pipe inside very smooth and straight with lower Reynolds numbers.