M Danger

posted this on the NA list only got 2 answers but not exactly what i was looking for.

I thought that theres something that people use to mock up headers. I want to say its some kind of bendable tube. cardboard comes to mind but that cant be right. anyone have any suggestions?

Redshift

Check out <a href="http://www.summitracing.com" target="_blank">Summit Racing</a> and do a seach for "Hooker Headers". Look for their straight and mandrel-bent tubing. These are 16 or 18 gauge mild steel and come in different diameters -- perfect for prototyping.

fortysixandtwo

I haven't done this, but flexible metal electrical conduit or flexible gas line. The gas line should allow a tighter bend radius. But I don't think it's readily available in large diameter sizes, so you may have to account the smaller diameter when checking clearances

nine-44

Go to Meijers or Autozone, get some flexible exhaust tubing. I used some flexible hose from a vaccume cleaner, it doesn't hold the shape though. Good Luck

Russ Murphy

Whatcha doin'? If you need a mock-up of a header why not use the existing header for clearance dimensions?

M Danger

cause it from 931 and its a damn block of iron. and no one makes headers for a 931 and the turbo is on the same side. basically have to figure out how to make a 951 header go the opposite direction, clear the crossmember and then the exhuast pipe come back under it.

Russ Murphy

How about building it in place with small sections of mandrel bends tack-welded together? That way, when you're done with the "mock-up" all you'll have to do is remove it and finish weld the joints.

M Danger

well the head is off, id need a welder, yada yada
car is on the ground, dont like laying on the ground much anymore.

but i do have a separate head and block. myabe if i can borrow a small welder..
but i want the real header to be stainless.

Russ Murphy

You can certainly do it with stainless mandrel bends. I'm guessing here, but I'll bet thats how Turbo Tim built that crazy 4-1 header. when you're good at that method, it can have a very seamless, smooth form.

TurboTim

Russ, Are you talking about these bad boys?

<a href="http://boards.rennlist.com/upload/4to1001.jpg" target="_blank">http://boards.rennlist.com/upload/4to1001.jpg</a>

or these headers?

<a href="http://boards.rennlist.com/upload/968header001.jpg" target="_blank">http://boards.rennlist.com/upload/968header001.jpg</a>

Steve Lavigne

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by TurboTim:
<strong>or these headers?

<a href="http://boards.rennlist.com/upload/968header001.jpg" target="_blank">http://boards.rennlist.com/upload/968header001.jpg</a></strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">TIM!!!!!!!!!!!!!!!

You owe me a new keyboard! I drooled all over it.

<img border="0" alt="[burnout]" title="" src="graemlins/burnout.gif" /> <img border="0" alt="[thumbsup]" title="" src="graemlins/bigok.gif" /> <img border="0" alt="[jumper]" title="" src="graemlins/jumper.gif" /> <img border="0" title="" alt="[Eek!]" src="eek.gif" />

Russ Murphy

That's what I'm talkin' about.