Scooterotica

Hi All,

Anyone made a home made exhaust? Ive just bought some software and printed a paper pattern but now Im stuck as what to do next. Do you print off the pattern and cut round it or do you generate a cad file and get it laser cut? Help help help



Wayne

Yeah, cool! First off, what program did you use?
I think it comes down to how accurate you want to make your cones and/ or how much effort you want to put into it. I'd get them laser cut as I don't see any point in trying to do them by hand other than saving a few quid, and even then it's prob not worth the savings.

I'd cut it yourself. That way, once you've fecked one up a bit, you can make another one pretty quickly - rather than having to go back to the cutting shop.

I once watched an exhaust of mine being turned from a sheet of steel into a made to measure pipe. It's not a five minute job.

Muttley McLadd wrote:I'd cut it yourself. That way, once you've fecked one up a bit, you can make another one pretty quickly - rather than having to go back to the cutting shop.

I once watched an exhaust of mine being turned from a sheet of steel into a made to measure pipe. It's not a five minute job.

Yeah, cheers bud. Ive just been told the same off another guy on the smallframe forum. He makes pipes and has said to use a pair of tin snips. Hes gonna make one tonight and post some pics for me

Muttley McLadd wrote:once you've fecked one up a bit, you can make another one pretty quickly

Good point, I guess im gonna f@@k a few up before I get one right

Wayne Miller wrote: Good point, I guess im gonna f@@k a few up before I get one right

I suppose f@@king up is the wrong expression.. changing your mind is probably a better one

way to go wayne...always admire someone who tackles things themselves ...but be aware that a few mill out here and there on every joint can add up to serious discrepancies in overall tuned length ...for eg ...a pipe that is curled around and has maybe 20 welds with a 1mm error can add up to say 20mm in overall length ...and so affecting the power peak by approx 500 rpm plus .

once you have your paper/card pattern the steel should be cut to that ...rolling the sections is the tricky bit

sean brady scooters wrote:way to go wayne...always admire someone who tackles things themselves ...but be aware that a few mill out here and there on every joint can add up to serious discrepancies in overall tuned length ...for eg ...a pipe that is curled around and has maybe 20 welds with a 1mm error can add up to say 20mm in overall length ...and so affecting the power peak by approx 500 rpm plus .

It a sprint pipe for my smallie that Im making so Im gonna cut off my right hand side panel keep the pipe as straight as possible, I dont fancy tackling all of the bends. I'll stick a wheelie bar on it (God knows I need one) and support the exhaust there
Mathias from GSF has give the pipe design the once over and advised on a few changes so I'll take his advise and plod on with the job, if it doesnt work out I'll try again and agian until it does

RICSPEED wrote:once you have your paper/card pattern the steel should be cut to that ...rolling the sections is the tricky bit

Ive met quite a few knowledgable people whilst building my smallie engine one of whom is a metal fabricator, I'll cut out the bits and pop over to his work shop, he has a slip roll and has said that he'll show me how it works when Im ready

Wayne Miller wrote:

RICSPEED wrote:once you have your paper/card pattern the steel should be cut to that ...rolling the sections is the tricky bit

Ive met quite a few knowledgable people whilst building my smallie engine one of whom is a metal fabricator, I'll cut out the bits and pop over to his work shop, he has a slip roll and has said that he'll show me how it works when Im ready

cool :bouncing: