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Nov 13, 2006 17:09:34 GMT
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After all my searching has turned up nothing, I'm looking towards the custom/home made route. I need a four branch exhaust manifold for my toyota 5k build to go in my Starlet, pref 4-2-1, but 4-1 would do. Has anyone here made their own, or know of a company that does them for not STUPID money? Or have I got to go the Yahoo.jp route & sell a kidney?
Any idea's welcome!
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Nov 13, 2006 18:07:04 GMT
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you can buy collectors from demon theives and the like. also off the peg bends are available too. go to your local engineers with a spare exhaust flange gasket and get some flanges knocked up, then get welding! also, could you adapt a production car exhaust manifold, like cr500dom is/was doing with an s2000 manifold?  |
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Nov 13, 2006 18:24:16 GMT
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A lot of exhaust fitters (proper ones not kwik fit types) have most parts available so have a word with these. They can either make a one up for you or sell you the bits to make your own. Prices arent too bad either.
If you want stainless milner off road sell all part sto make your own system. They are pretty cheap as well
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Nov 13, 2006 18:25:00 GMT
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Nov 13, 2006 19:46:00 GMT
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Thanks for all your ideas, i shall measure up & get some bends ordered & flange made & improve my welding skill0rz
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Nov 13, 2006 20:38:34 GMT
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I know a guy out Bingham way makes them, not cheap though, but you get what you pay for...
Also know a guy will laser cut flanges for you in mild or stainless steel, not expensive. Just need a pattern or gasket to work from.
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1937 Austin Street Rod - 1941 Wolseley Not Rod - 1956 Humber Hawk - 1957 Daimler Conquest - 1966 Buick LeSabre - 1968 Plymouth Sport Fury - 1968 Ford Galaxie - 1969 Ford Country Squire - 1969 Mercury Marquis - 1970 Morris Minor - 1970 Buick Skylark - 1970 Ford Galaxie - 1971 Ford Galaxie - 1976 Continental Mark IV - 1976 Ford Capri - 1976 Rover V8 - 1994 Ford Fiesta
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Nov 14, 2006 10:07:32 GMT
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Sounds promising, have you got any details you can PM me? If I can't afford one to be made, at least I could get a decent flange done & make my own
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Nov 14, 2006 10:12:24 GMT
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Longlife exhausts do them IIRC, not sure how much, depends on complexity I guess. I think the quote for mine was the same as the turbo back exhaust. I've not had one made yet.
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Nov 14, 2006 11:14:15 GMT
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Nov 14, 2006 11:49:03 GMT
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I know their intake manifolds are quite reasonable, I nearly suggested them but I think he wants to make his own or get one cheaper than a bespoke piece is going to cost.
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1937 Austin Street Rod - 1941 Wolseley Not Rod - 1956 Humber Hawk - 1957 Daimler Conquest - 1966 Buick LeSabre - 1968 Plymouth Sport Fury - 1968 Ford Galaxie - 1969 Ford Country Squire - 1969 Mercury Marquis - 1970 Morris Minor - 1970 Buick Skylark - 1970 Ford Galaxie - 1971 Ford Galaxie - 1976 Continental Mark IV - 1976 Ford Capri - 1976 Rover V8 - 1994 Ford Fiesta
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Nov 14, 2006 12:08:41 GMT
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Indeed I do, I know i'd be able to get one from the yahoo auctions in Japan, but the price is a bit out of my league. I might get one in the future, I just want one that works for now, flows better than a standard one & will allow me to fit my twin 40's. Will probably go the home made route. Thanks for all your help
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burns
Part of things
Posts: 373
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Nov 14, 2006 12:09:08 GMT
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What I've never understood about making your own is how your supposed to do the welds around the inside of where the pipes go into the collector? Surely there's no room to get a welding torch in there?
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filmidget
East Midlands
Mostly Lurking
Posts: 1,652
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Nov 14, 2006 12:21:43 GMT
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Manifold Gnomes.
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'79 MG Midget 1500 - Still patiently awaiting attention
'02 Vauxhall Astra 1.8 Elegance(!) - Better than you might think
'03 Mazda MX5 - All new and shiny looking (thanks to Antony at Rust Republic)
'09 Renault Clio - Needs to go.
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Nov 14, 2006 12:32:02 GMT
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I usually weld round as far as i can go, then i weld from the inside to create the seal. Then again I make my own collectors of the merge type, rather than the slip in type.
J
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Nov 14, 2006 12:59:34 GMT
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erm, if your weld has fully penetrated do you need to weld from both sides?
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1937 Austin Street Rod - 1941 Wolseley Not Rod - 1956 Humber Hawk - 1957 Daimler Conquest - 1966 Buick LeSabre - 1968 Plymouth Sport Fury - 1968 Ford Galaxie - 1969 Ford Country Squire - 1969 Mercury Marquis - 1970 Morris Minor - 1970 Buick Skylark - 1970 Ford Galaxie - 1971 Ford Galaxie - 1976 Continental Mark IV - 1976 Ford Capri - 1976 Rover V8 - 1994 Ford Fiesta
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Nov 14, 2006 13:32:00 GMT
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What I've never understood about making your own is how your supposed to do the welds around the inside of where the pipes go into the collector? Surely there's no room to get a welding torch in there? You need to weld the collector from the inside out  4 pipes slash or curved cut from the outside in forming a point in the centre Weld back from this point along the 4 branches to form the inner seal Grind weld back to give smooth merge point Create the the outer skin of the collector and weld on to the outside of the tubes, sealing the outside up The Easier way is bring the 4 tubes together and weld a Diamond in the centre of them to seal hole up and weld between the pipes as well. Create a Cone to form the collector and nip up in 4 jaw chuck to wrap around the 4 primaries  Weld around outside to seal again That might give you a bit more insight to why a Proper manifold costs more than the rest of the system You should also make the rest of the manifold in sections no bigger than you can get into to clean the welds up as you go along very time consuming but well worth it HTH Dom |
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