Does anyone know where you can get a second cast outlet to split a stock manifold? See pic here? http://www.chevytalk.org/fusionbb/s...st/1293298/hl/splitting/fromsearch/1/#1293298
I have done this many times, just did a 261 last week. Wish I had pics. I like to plasma a cut down the manifold between cyl 4 and 5 and cut a plate to separate the front 4 from the back 2. Then I simply cut a hole in the rear section and weld in a piece of 1.25" black pipe. The outside diameter of the pipe is about 1 and 11/16", The last several of these I just sized up 1.75" exhaust pipe to go over and clamped and tack welded. Years ago I purchased outlets from Allied Exhaust in Brea Ca. and Benicia Ca., but they no longer carry the part. Oldtimers tell me they have used thermostat outlets,all the ones I find are aluminum? The reason for the 4-2 split IMHO is a broken pulse and better sound.Most inlines fire 1-5-3-6-4-2, so the 4-2 split from the tailpipes is LRLRLLLRLRLL and a 3-3 split is LRLRRLLRLRRL so twice around the firing order the 4-2 pops 8x on left and only 4x on right, where as the 3-3 split is 3x left and 3x right. If you have ever heard a 4-2 split there is nothing like it.
Good stuff,i just got given a tripower 216 intake fabbed from 3 centers of 3 manifolds brazed togather and capped off, this is the route ive been looking at f or exhaust my vintage budget dirt track car
Shaggy, please post a picture of this intake you got. Sounds very cool. I have thought about building one like that before but have never seen one.
I'm not sure how that would work. I don't know if a 261 head is different from a 216 or 235 though but you have 4 exhaust outlets with the following valve train: #1 intake (2) #2 intake (3) #2 exhaust (4) #3 exhaust (5) #3 intake (6) #4 intake (7) #4 exhaust (8) #5 exhaust (9) #5 intake (10) #6 intake (11) #6 exhaust (12) The first outlet of the manifold exhausts #1, the second #2 and #3, the thrid #4 and #5 and the fourth #6. How could you split the flow between #1-#4 and #5-#6? Unless you put a plat that extends into the head? Can you share some pics, it sounds interesting.
Exactly what I was looking for. I have to give credit to Big_Dan_50 for being first, he sent a PM last night. I looked on eBay but I guess must have missed them or was using the wrong search phrase. I first started off with a a set a tube headers from Speedway. See here: http://www.jalopyjournal.com/forum/showthread.php?t=742880 Major interferance issues. I have an Innerline Oil filter and the front header outlet interferes with the oil filter. The rear header has issues with the throttle linkange and the p-brake rod. The bung for exhaust tubing to the heat plate come out right where the p-brake rod is, if it were welded on 1 in. higher it would be ok. I could rework the front header, rebend a throttle rod, and relocate the bungs but it more work than going with a split stocker manifold which I've looked over really good and shouldn't have much interferance other than bending the throttle linkage rod a litttle. I found this guy who will slit a stock manifold: http://www.inliners.org/Advertisers/kkk_ad1.html I may just go ahead and take this route. I think he's doing quite a bit of work for what he's charging you, hopfully the price is uptodate, I'll give him a call tomorrow.
You are exactly right, and answered your own question.Just divide the #4 and #5 siamesed exhaust outlet.No need to run the plate into the head,exhaust like water will always follow the path of least resistance.Because #4 and #5 are separated in the firing order it is not a problem.I will post pics next time I have one off.
I don't think Kansas Kustoms does them anymore probably for the reason of being sent cracked or unusable cores. My old fart welder buddy is complaining about the end of golfing season and asking if I have any more old school work for him so a batch of flanges/elbows/complete manifolds is coming up in the method I prefer which is to have 2 identical flanged, studded, and parallel outlets.
Kansas Kustoms no longer does the manifold splitting so I guess I'm going to have learn the art. I picked up an iron 1.25 90° elbow yesterday at a plumbing supply shop. I can't believe how hard it is to find 2 in. exhuast flanges, none of the part stores have them in stock so I'm going to have to order them from Speedway. Hoping to have it all done by Saturday for the last cruise night of the year.
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