Alrighty i have been thinking about this topic alot lately. I could possibly make headers and an intake. Its for an old flathead inline so the headers and intake would share the mounting flange, right? So i could take a gasket to the machine shop where i work and have em mill me out a flange, what type of metal should i use? Then im confident in my welding skills so i would start fabbing the pipes for the headers. But for the intake portion would piping still work just fine? I dont see why not, and it would make putting multipule carbs on it easier i think (just run the tubes to individual colletor like thingies that the carbs would mount on). So how feasable is this? Or is the one of those things that if your asking questions about it your not good enough Once again, thanks a bunch!
Here's the Packard 288 that my father built manifolds for. Header and intake flanges are separate. The intake manifolds are out of aluminum; he carved a wood dolly and beat a couple sheets of aluminum around them, then welded and polished. Looks like one solid peice now. I did see in a mag a while back where a guy had made an intake for his inline 8 out of a chunk of left-over drive shaft. Looked ok, couldn't say how it worked.
I Just Did One For My 500 Caddy Out Of 1/2 Aulm. Plate And Irrigation Pipe And Tig Welded It Together And It Works Fine.
Anyone Have Pics Of Home-made Chevy Inline 6 Intakes? Id Love To See Em....plan To Make One When I Have More Tools To Do So. Kurt
I just took the gasket to my water jet cutting guy and he cut out the flanges on his machine for like 40 out of 3/8 steel for the headers on my 270 dodge, or I have used the intake gaskets on SBC, to fab an intake. Rodger
We used to make manifolds for 800 cid inline six cylinder Minneapolis Moline irrigation engines We use stainless steel pipe and weld-in fittings. Torch cut the flanges out of carbon steel -- with plasma now it would be a cinch to cut out of SS Worked for us
i just finished one for my banger. looks good for me???? if some will e-mail me i will send pics and you can post them??? for me. peanut@knology.net
Use whatever material you are comfortable with working on. I built the intake and exhaust for my blown 225 slant six out of carbon steel and it has been on the road for five years. I am also building the intake and exhaust for my HA/GR out of carbon steel.
Looks kinda easy, but that can be famous last words. Think I said something on my 1,660th jump as it were the last one I ever did. At least give it a go, Im thinking of making my own 3x2 intake for my RPU. 302, I know you can get them, but if I can do it cheaper........... Doc. PS, Beemer, I still think my digital watch is neat.
Use mild steel, 1018-1020 carbon content for flanges. Use 1 5/8" inside diameter tubing, same material spec. with a 3/32" wall for anything under 400 cubic inches. Use 1 3/4" inside diameter for anything over 400 cubic inches. (That tubing spec is for the exhaust manifold.) A really smart thing to do is make all flanges out of 1/2" material,then when all the welding is finished, put the finished part up on the mill and "face" all the mating flanges to remove any welding warpage. If you are a good tig welder and a bear for punishment, make it out of type 304 stainless steel.
Hey, Not to hijack your thread, but in keeping with the idea I am tempted to do a 3 duce carb for my caddy flathead. I saw this and thought a third duce would be even better and give it some symitry: Naturally the middle duce would need a riser to level them. What do you think?
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