Posted 12 July 2010 - 10:59 AM
Posted 12 July 2010 - 11:34 AM
Posted 13 July 2010 - 11:17 AM
Posted 13 July 2010 - 01:42 PM
Check out my '66 Nova build thread too.
Don't be scared to drill into the heads. Just use a drill bit large enough to allow you to get your Xacto into the hole you drilled. I used a #61 bit, the biggest in the set of little bits I have. Then I spun the Xacto blade tip in the hole all the way around so that it scraped out the hole to the right diameter. Stop periodically to see if the solder will slip into the hole. I didn't want it to be too loose, because I wanted the hole to help hold the solder in place.
One thing I noticed on a few builds on that other thread is the lack of flanges at the head. It's great that the tubes stay in place just being stuck in the holes, but it doesn't look realistic. (EDIT: I looked again, and I think those are in-progress shots, so I assume the builder hasn't added the flanges yet..? No offense to whoever built those.) Study pics of real headers, and you'll see they all have some kind of flange, either one across all exhaust ports, or individual ones for each port, but there's gotta be something to bolt them onto the head with. The flange isn't that hard to build. You can kinda see my process of making them. Just drill them out like you do the exhaust ports, and make the holes just big enough for the solder to slip all the way through. Plus, if you damage the head while you're drilling it out, the flange could help hide some of that.
Edited by Eric Stone, 13 July 2010 - 01:47 PM.
Posted 13 July 2010 - 02:28 PM
this is a SBC easy to find the ports and drill!
Edited by MikeMc, 13 July 2010 - 02:34 PM.
Posted 13 July 2010 - 05:47 PM
When you are looking at the header photos you will notice that the pipe lengths are (or should be) all the same. If they aren't they won't look real.
Posted 13 July 2010 - 05:55 PM
...don't worry about drilling but I would drill very small holes (pilot holes) first to be sure you get the hole in the correct location....
Just wanted to add, that's one reason I drill a small hole to start with, then open it up with the Xacto- If you use a drillbit that's just the right size for the solder, then miss your location by a little bit, then you've messed up. You can drill the small hole as close to the middle of the exhaust port as you can, and if it's off a little, you can work it with the Xacto to get the hole centered up in the right spot by the time it's the correct size.
Edited by Eric Stone, 13 July 2010 - 06:57 PM.
Posted 13 July 2010 - 06:07 PM
Posted 14 July 2010 - 08:26 AM
I havent found anything satisfactory on how to build them. Is there a diagram to go by? or do I just try to bend the way I want them?
There's no one diagram because different headers look different! Depends on the engine, and the brand/style of headers you want to recreate. A google image search is your best friend...
Posted 14 July 2010 - 10:00 AM
Posted 14 July 2010 - 10:04 AM
...A google image search is your best friend...
Also check out www.jegs.com and www.summitracing.com. You can search for headers for the particular car you're building, and if they have them, then you can mimic the shape of those in the photo and maybe get them to fit your model a little better.