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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Respect mine and I'll respect yours.

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.

What about carbon fiber that'd really look cool

^^ 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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You're only supposed to blow the BLUDDY DOORS OFF!!

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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No offence intended here but--> anyone writing a book about minis 30 years ago may not have experienced such worn or stuffed-with components as we are finding these days.

You should put your heart & soul into everything you do.

A lot of bikes use alloy mufflers, the engine pipe is usually steel though.

Tim

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1951 Morris Commercial J Type Van
1955 BSA C11G
1961 Morris Mini Traveller
1969 Triumph TR6R
1977 Leyland Moke Californian

these days the bike pipes are all titanium (Mostly)

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No offence intended here but--> anyone writing a book about minis 30 years ago may not have experienced such worn or stuffed-with components as we are finding these days.

You should put your heart & soul into everything you do.

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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Respect mine and I'll respect yours.

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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Too many cars, and too little time.

I should say that titanium has a much higher melting point than aluminium and is stronger for the same weight

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Too many cars, and too little time.

yep, titanium nearly all the way through on my R1 , inc muffler

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No offence intended here but--> anyone writing a book about minis 30 years ago may not have experienced such worn or stuffed-with components as we are finding these days.

You should put your heart & soul into everything you do.

I always thought of titanium as an "exotic" metal. How dose it compare to alloy for price?

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Respect mine and I'll respect yours.

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!!

I think you should use magnesium for the extractors. That stuff's light.
Let me know how it goes.

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1970 Cooper S ex-Bathurst & ATCC
1964 Austin Cooper S ex-Group C race car
1967 Morris Cooper S ex-Group B
1962 Mini Speed sports sedan
1968-71 ex-Peter Manton Shell car