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Post by spud on Feb 15, 2019 8:46:26 GMT -8
Yaknow he is a very old dude, and he is still has a pretty cool website, not near as cool as it once was, but still a great peek into the legacy of hot rodding. The days when you had to spark up the torch and make it if you wanted it. Thats what does it for me. It might not be a robotically welded showpiece, but when your done its an accomplishment and money cant buy that, and it would take a lot of money to trick someone into doing a set for you. Visit headers by ed before it passes into history and tell ed hi!
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Post by PHAT69AMX on Feb 15, 2019 11:28:11 GMT -8
From 2005 AutoLite Catalog
5/8" Hex, Thread Size & Reach: 14mm & 3/4" reach Plug Type: Power Tip (Resistor)
Hot
..........# 3926
..........# 985 (special power tip)
..........# 3924/AR3924
..........# 5184 (.060 gap)
..........# 5224 (special tip design)
..........# 3923/AR3923
..........# 5503
..........# 3922
Cold
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Post by spud on Feb 15, 2019 17:21:06 GMT -8
Got a set of ngk v power 7938 ...
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Post by Captain Awesome on Feb 17, 2019 18:56:51 GMT -8
How's the "Headers by Spud" coming along?
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Post by spud on Feb 18, 2019 4:10:08 GMT -8
Well slow, one elbow at a time. My gas welding skills are rusty, eyesight dont help. But making progress. I dont want to load reb up with too much work posting pics so im waiting for some real progress. I guess its enough to say working out a prototype header is a lot of work on and off the car and working and reworking tubes to be equal length. I have also quite a bit of second guessing to work through, since i dont know a lot about designing a tuned header and the math involved bores me. So this is gonna be a lot of guesses and in the end it’ll just be ok as far as the tune goes, but since the engine is going to be changed up a lot its not gonna matter much. If i could decide on something and just do it, i would pay burns stainless 75 bux for his computer model. He is the man these days without question. But its no biggy i will guess and see.
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Post by Captain Awesome on Feb 18, 2019 12:13:58 GMT -8
Reb has nothing better to do.
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Post by 69Rebel on Feb 18, 2019 12:48:08 GMT -8
^^LOL
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Post by 69Rebel on Feb 21, 2019 15:52:22 GMT -8
New pics today. Those little spring clamps are certainly handy.
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Post by spud on Feb 22, 2019 3:35:45 GMT -8
Yeah that clamp is holding two elbows together, while in figuring out how i want to run#6 tube. The wire in the next pic is a 28” model. First tube for #2 cyl, came out to be 28 “. So i cut a 28” model wire from a wire clothes hanger, and use it to model up the next tube. Helps work out tube configuration and routing while keeping uniform length. Notice the two tubes merged in the starter motor area? Yes these are going to be tri y headers. With longer primary tubes and shorter secondarys. Not like i know what im doing with the design, just copying successfull current designs. Header tech is a fuzzy science. Lots of math for closes guesses. In the beginning the available header calculators suggest a 1.5 inch tube 40 inches long for my input #s based on my engine and performance specifics. No brainer, pretty much what i figured from the start. Twist is i also wanted tri y, due to my 1000. -5000 rpm real goal. If i want to build a race 304, i will build another engine, this one is factory and will stay that way. Anyways tri y is what you want to maximize power in that range. Its very propriety info and the masters of tri y tech are cagey bastards, they aint letting what they know fall into competetive hands, but yhey do know tri y has significant advantage to 4-1 header design in terms of broad torque( power) band tune. Since a tri y had three tunable” merges”” or “nozzles, they can play with tube size and length to change the tuning to provide a broader scavenging response, and wider rpm power gains. 4-1 headers are predictable and will always be a narrow power gain situation. If you look tri y tech is prevailant in nascar and pro stock now. Its simply a better design. Well this subject could take up a lot of bandwidth really and will always be controversial. No header does it all but tri y comes pretty close. Not a big deal to me im a trial and error guy and go with my best guess and these headers are it. You will see my guesses go to work in metal. These headers will be 40 inches long, 28 in 1.5 tube, then 12” in 1-3/4 tube. Finding info on tri y is tough. So im guessing and copying current trends. Im no einstein and math bores me. Not in the game for boredom.
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Post by sc397 on Feb 22, 2019 5:02:42 GMT -8
I like how you hogged out the flange so that you might actually get a spark plug in the hole without leaving your socket permantly attached to it.
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Post by spud on Feb 22, 2019 5:36:59 GMT -8
Yeah they are hogged out , but only enough for a small plug. Got those flanges from jeg’s, they have a lot of extra metal. I got tired of cutting on them. The dipstick tube is always a problem. I usually cut the flange out for that. Considering cutting all the flanges out, but due to stresses induced when welding the finished tubes, they will move when you cut the support beams out of the flange. So i havent decided on that yet. It would be a good way to cut a pound of weight off. The tubing is pretty heavy gauge, these headers will have some weight to them. But they should last me till long after im dead. Hooker super comps have a nice flange, thick and well sculpted, but they make a mess of the port shape trying to squeeze those big 1-7/8 tubes into it. So i have an old set of those but not worth cutting the flanges off to try and use for these small tube headers. So i bought new ones. They were like 43$ each. Kinda expensive. It would be worth finding a willing waterjet cutter to make a fat batch of those... one drag is the late 304 heads i have got the tiny 5/16 bolts on the end ports. Not sure why amc did that...
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Post by 69Rebel on Mar 3, 2019 19:00:26 GMT -8
Latest picture update.
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Post by spud on Mar 3, 2019 19:40:47 GMT -8
I made the two “y’s” in seperate parts to allow full welding around adjacent parts. Now they are ready for final assembly.
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Post by 69Rebel on Mar 5, 2019 20:42:37 GMT -8
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Post by 69Rebel on Mar 5, 2019 20:45:28 GMT -8
Those are a work of art. Build a fixture so that you can replicate them.
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