I don't think alloys really like being heated to exhaust temperatures and cooling again constantly. Thats if it doesn't melt or reshape itself from the heat the first time anyway.
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| Author: | Kennomini [ Sat Apr 14, 2012 11:43 pm ] |
| Post subject: | Alloy exhaust? |
Why not use an alloy exhaust? I figure it could be done and still be effective. I'd imagine you'd need to use a wrap around steel strap to mount it instead or tabs welded on to the pipe. Maybe just keep the steel extractor manifold because their is a lot of stress through that area and with a flexi joiner just after the firewall elbow. Why not use alloy, I'd guess the race boys would have tried it at some stage. Anyone have any comments? |
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| Author: | Harley [ Sat Apr 14, 2012 11:51 pm ] |
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I don't think alloys really like being heated to exhaust temperatures and cooling again constantly. Thats if it doesn't melt or reshape itself from the heat the first time anyway.
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| Author: | marconi [ Sun Apr 15, 2012 1:01 am ] |
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What about carbon fiber that'd really look cool 
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| Author: | The Duckmeister [ Sun Apr 15, 2012 6:05 am ] |
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^^ Fine if you don't plan on ever firing the car up - that stuff (more precisely the resin that binds it) is even less tolerant of high temperatures than aluminium. |
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| Author: | TheMiniMan [ Sun Apr 15, 2012 9:22 am ] |
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i did run an alloy tail pipe on my speedway car for years that is to say that, we had the muffler in the tunnel, forward of the rear subframe & then the alloy tail pipe clamped to that , both pipe & muffler were strapped to the floor of the van... worked a treat. i don`t suppose it saved much weight really, but it was a laugh when i picked the back of the car up to get the ramps under it, to get the car on & off the kombi ute... & people would come over saying "Wow, it`s light isn`t it" ,,, & i`d say "yeah it`s because of the alloy tail pipe" 
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| Author: | Timbo [ Sun Apr 15, 2012 9:55 am ] |
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A lot of bikes use alloy mufflers, the engine pipe is usually steel though. Tim |
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| Author: | TheMiniMan [ Sun Apr 15, 2012 10:08 am ] |
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Timbo wrote: A lot of bikes use alloy mufflers, the engine pipe is usually steel though.
Tim these days the bike pipes are all titanium (Mostly)
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| Author: | Kennomini [ Sun Apr 15, 2012 10:37 am ] |
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But if their was a period when they used alloy it must be in some way useable. I don't see why you wouldn't be able to make an alloy muffler and have alloy tail pipes, just keep the steel extractors. That would have to save a few kgs and if you keep with it you'd be able to over come some of the issues that pop up... |
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| Author: | awdmoke [ Sun Apr 15, 2012 11:54 am ] |
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You are missing the point a little there. Why use aluminium alloy when you can use titanium alloy? Many new cars and most bikes now use titanium, I run a suzuki gixxer Ti muffler on my road mini |
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| Author: | awdmoke [ Sun Apr 15, 2012 11:57 am ] |
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I should say that titanium has a much higher melting point than aluminium and is stronger for the same weight |
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| Author: | TheMiniMan [ Sun Apr 15, 2012 12:00 pm ] |
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yep, titanium nearly all the way through on my R1 , inc muffler
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| Author: | Kennomini [ Sun Apr 15, 2012 4:34 pm ] |
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I always thought of titanium as an "exotic" metal. How dose it compare to alloy for price? |
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| Author: | kirby [ Sun Apr 15, 2012 6:47 pm ] |
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The Duckmeister wrote: ^^ Fine if you don't plan on ever firing the car up - that stuff (more precisely the resin that binds it) is even less tolerant of high temperatures than aluminium.
Carbon fiber doesn't have to mean fancy body panels, there are resins that are very tolerant of heat. Ala: carbon aerogels. 
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| Author: | simon k [ Sun Apr 15, 2012 9:46 pm ] |
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kirby wrote: Carbon fiber doesn't have to mean fancy body panels, there are resins that are very tolerant of heat. Ala: carbon aerogels.
fark - that looks expensive!! |
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| Author: | low n blown [ Mon Apr 16, 2012 4:27 pm ] |
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I think you should use magnesium for the extractors. That stuff's light. Let me know how it goes. |
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