Anyone have an Aluminium exhaust?
Turbo Mini Forums

I this sounds daft but i remember someone a while back was thinking about using an ally exhaust to save weight, and it was a knoledgable person too IIRC.

i think it was the in reference to the back box and maybe the link pipe, did it ever happen? did it melt? are there any chemical reaction concerns? or did i imagine it? (perhaps)

i made myself one way back in 94 i think it was, the single back box was about 300mm wide with rounded sides, the pulses from the exhaust gasses fatigued it on the top and bottom due to having big flat areas,i welded it up a couple of times but soon got sick of it so had one hand made in steel at Tony Law exhausts here in leeds.


carl

WWW.FORCE-RACING.CO.UK PLEASE CLICK HERE

The standard can on my bike is made from alloy not sure how well they last as I changed it for a race one but they are used on bikes by quite a lot of people with no problems so can't see why a car would be different

Alloy bike exhausts have been around for a few years and I havnt seen any fail so far they seem to be made from somthing real tough.
Allan

http://www.rabdunn.co.uk/

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

Some one i know built a aluminium rear box for his turbo mini its was made from a pneumatic ram so the walls were around 5mm thick think he has had no prblems with it possible its a little to loud tho also looks the dogs

5mm thick? So , it's heavier than a steel box then...

5 mm is pretty damn thick!!

hmm, it actually sounds more feasible than i thought!

basicly, i'm looking at doing a 2 1/4" or 2 1/2" system, and i remembered something about ally exhausts from way back.

Fair enough Carls failed (I assume this was on a NA engine?) but with a turbo there shouldn't be as much pulsing (although there may be a lot of resonance) and nowhere near as much silencing is needed so a round silencer box should give enough silencing and hopefully hang together.

It's something that can i can put together fairly cheaply and try, if it doesn't work it doesnt work!

There is a 206gti that races in the Hot Hatch race series. It seems to be holding up, and its the same one that has been on all year. However it does limited mileage so i wouldn't be sure on road mileage.

I think it work hardens quite quickly. Your bog standard stuff anyway.

I reckon that the way to go is mild steel personally. :) Stainless is an arse to work with, as is virtually everything else.

Did you know, titanium is the only metal that burns in nitrogen?

Bugger off, I'm getting there.

Corvette Z06 uses titanium. $$$$ to save a claimed 17 pounds. Since a mini exhaust is much smaller, I bet you're looking at saving maybe 6 pounds. Aluminum is lighter than titanium though.

1275 with Back Door Turbo

Hey wait - if they suck we should all use them for their superior scavenging!

1275 with Back Door Turbo

I thought CCC made one a few years ago for a Mk2 Escort....dont recall much about it though...

On a Mini, the exhaust is so short anyway, how heavy is one ??

Thinwall stainless might be an easier option.

As for titanium. I felt the weight of an entire exhaust system for a Subaru in titanium. I was absolutely amazed at how light it was !!!! Standard/aftermarket stainless sytems must be about 6-7 times the weight.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

Most after market manufacturers make ally cans for bikes I have never seen one fail,they dont use ally internals.I have used loads and sold hundreds.
Allan

http://www.rabdunn.co.uk/

Here's another thought, a longer system will run cooler more often and get quite a bit of acidic condensate, this will burn through it in no time. A bike can will run hot and so not really suffer from this. I suppose you could coat it but the expansion/contraction of this would probably flaw the surface anyway.

Be interesting to know how much Ti stock is. Do have to get myself a tig welder as well.........

Bugger off, I'm getting there.

Thin wall steel tube is what you want.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

when i had the exhaust for my green hillclimb mini at Tony Laws in Leeds about 14 years ago i had them make it one gauge thinner, every lttle helps.
the cost of titanium [in either g2 or g5] ranges from about £50.00 to well over £1000.00 a kilo. OH plus vat of course.
carl

WWW.FORCE-RACING.CO.UK PLEASE CLICK HERE