fv1609 Posted February 26, 2009 Share Posted February 26, 2009 Only need a brake pipe (cylinder to union) any ideas? I think you will find that this has the same terminations as the hose for a MGA part no. SBR051. The catch is that the bore is slightly narrower, so it will have a different flow than the hose on the other side. But the repro hoses that a company in the Midlands sell also have this limitation. Although I once discussed this anomally with the proprietor who felt that the flow of fluid would be just the same irrespective of a narrower bore! I would suggest that whilst you are at it you replace the same hose on the other side. That outer one does seem particularly vulnerable & I think you saw a pig at W&P with the same hose having failed. But if you haven't yet replaced any hoses perhaps it is time to replace the lot? Quote Link to comment Share on other sites More sharing options...
Adam Elkins Posted February 26, 2009 Share Posted February 26, 2009 Better get the polish out then. Quote Link to comment Share on other sites More sharing options...
paul connor Posted February 26, 2009 Share Posted February 26, 2009 Yes, they are all getting replaced. I have a new way of working. Fix and replace. dont bodge and hope it lasts! next up is the Exhaust system. trying to see if its cheaper to get one fabricated or buy a pre made. Next is the needle scale and full repaint in April.. Quote Link to comment Share on other sites More sharing options...
fv1609 Posted February 26, 2009 Share Posted February 26, 2009 It shall be DBG.. I intent to baremetal. red oxide/grey/og/dbg nice and thick and smooth.. Why bother with "og" then I intend to build an outdoor storage cover to keep it dry.. If you made it out of say a 12 x 12 we could all come round when it rains at the showground. Quote Link to comment Share on other sites More sharing options...
Adam Elkins Posted February 26, 2009 Share Posted February 26, 2009 Make sure the exhaust has the heat shield on the down pipe, you dont want the shock rubber melting. Quote Link to comment Share on other sites More sharing options...
fv1609 Posted February 26, 2009 Share Posted February 26, 2009 Make sure the exhaust has the heat shield on the down pipe, you dont want the shock rubber melting. Have you got your bit of asbestos ready? That firm in the Midlands who do the brake pipes also make a repro pig exhaust system. But I've never seen one in use & don't know what it consists of.. Quote Link to comment Share on other sites More sharing options...
Adam Elkins Posted February 26, 2009 Share Posted February 26, 2009 Am i right that the exhaust costs £250 ? I asume its from the manifold back, well it should be for that price. I'd just make one from stainless steel and never worry about it again. Quote Link to comment Share on other sites More sharing options...
Chrisg Posted February 26, 2009 Share Posted February 26, 2009 Have you got your bit of asbestos ready? That firm in the Midlands who do the brake pipes also make a repro pig exhaust system. But I've never seen one in use & don't know what it consists of.. Is this supplier know for champ bits? Quote Link to comment Share on other sites More sharing options...
Adam Elkins Posted February 26, 2009 Share Posted February 26, 2009 Clive, can you post a link for the site that do the brake hoses. cheers. Quote Link to comment Share on other sites More sharing options...
Chrisg Posted February 26, 2009 Share Posted February 26, 2009 I had a pair of brake hoses made up by Stevson Motors Tel. 0121 472 1702 Quote Link to comment Share on other sites More sharing options...
Adam Elkins Posted February 26, 2009 Share Posted February 26, 2009 I had a pair of brake hoses made up by Stevson Motors Tel. 0121 472 1702 Where are they based, and what was the cost? Quote Link to comment Share on other sites More sharing options...
Chrisg Posted February 26, 2009 Share Posted February 26, 2009 They're in Birmingham unfortunatly can't remember the cost paid cash at Beaulieu. Quote Link to comment Share on other sites More sharing options...
paul connor Posted February 26, 2009 Share Posted February 26, 2009 I'm interested in the Exhaust system.. But as you all say, Have no idea of the quailty? or indeed if it will be a "true" fit. Or am I better getting a mid and back box off another vehicle and making the sections up? Quote Link to comment Share on other sites More sharing options...
flyingp Posted February 27, 2009 Share Posted February 27, 2009 hi mate it might sound stupid ,, but yrs ago i had a fiat 132 sports , fast as hell anyway, scaffoled tubu then you can have smaller box,s and thay last for ever, or just a straight through pipe??? Quote Link to comment Share on other sites More sharing options...
paul connor Posted February 27, 2009 Share Posted February 27, 2009 I shall have to look into the idea of fabricating a system. I have a close friend that works for a motor exhaust outlet and really knows his stuff. I shall see what I can get to mod things up. Not sure about a through system! would sound like a Stukka! haha Quote Link to comment Share on other sites More sharing options...
fv1609 Posted February 27, 2009 Share Posted February 27, 2009 Paul will he be able to reproduce this though? It is needed from a noise point of view, but I always thought that an exhaust/silencer system was designed to give a predetermined back pressure for optimum engine performance. I can't find that written down anywhere, but had it fixed in my mind. Perhaps others can comment. Quote Link to comment Share on other sites More sharing options...
Adam Elkins Posted February 27, 2009 Share Posted February 27, 2009 Yes clive, it will need a certain amount of back pressure to run right. im sure there is a silencer on the market that will do the job. Quote Link to comment Share on other sites More sharing options...
fv1609 Posted February 27, 2009 Share Posted February 27, 2009 At least there is a bit of room to play with under there. On the Hornet I used to use the silencer of a Midivan. It was the only thing that would fit as the Hornet had the silencer under the radiator with the tail pipe exiting in front of the offside wheel. Quote Link to comment Share on other sites More sharing options...
Adam Elkins Posted February 27, 2009 Share Posted February 27, 2009 The silencer off my old toyota surf looks a similer size. Quote Link to comment Share on other sites More sharing options...
Adam Elsdon Posted February 27, 2009 Share Posted February 27, 2009 Exhausts are tuned to length, each time the cylinder discharges into the exhaust system it creates a pulse of X amount of gas, which fills a length of the exhaust system, usually a number of these pulses are required to fill the exhaust, (which is where the tuning length comes to play) but they also draw out the exhaust gases from the cylinders, the gas pulses racing down the exhaust cause a vacuum scavenging the exhaust gases from the cylinder, helping to clear it and allowing space for a fresh full intake to be drawn in for the next cycle. I think a slight restriction usually provided by the silencer helps to compress the gases slightly, so when they get past the silencer they speed up, again helping with the extraction of gases. I'm sure there is a better explanation but thats the way i understand it works! Quote Link to comment Share on other sites More sharing options...
Richard Farrant Posted February 27, 2009 Share Posted February 27, 2009 Exhausts are tuned to length, each time the cylinder discharges into the exhaust system it creates a pulse of X amount of gas, which fills a length of the exhaust system, Adam, I think that is more to do with high perfomance engines. In our subject, ie military vehicles, I can think of different applications using the same engine but having exhaust systems of vastly differing lengths. Of course the silencer can be "adjusted" to compensate for a longer or shorter pipe length. Quote Link to comment Share on other sites More sharing options...
AndyFowler Posted February 27, 2009 Share Posted February 27, 2009 What about vehicles with no exhaust silencer ? :confused: Quote Link to comment Share on other sites More sharing options...
Richard Farrant Posted February 27, 2009 Share Posted February 27, 2009 What about vehicles with no exhaust silencer ? :confused: I can think of one "vehicle", not military, which was built from new with a long straight pipe and no silencer. Engine was a 4 litre Austin straight six petrol / TVO and sounded superb on load. A straight pipe of certain diameter and length might well give enough back pressure, all dependant on the engine as well of course. Quote Link to comment Share on other sites More sharing options...
Guest catweazle (Banned Member) Posted February 27, 2009 Share Posted February 27, 2009 So if i do away with my straight through pipes and fit silencers to my boat it may be more efficient and go FASTER :yay::yay::yay: Quote Link to comment Share on other sites More sharing options...
Adam Elkins Posted February 27, 2009 Share Posted February 27, 2009 With a turbo the less restriction it has the better. Quote Link to comment Share on other sites More sharing options...
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