How Are These Pipes Made?
Moderator: rztom
Re: How Are These Pipes Made?
I've seen custom 2-stroke pipes chopped into all kinds of shapes and sizes.
Wish I had dyno numbers for unorthodox chopped pipes.
Maybe the HP loss is not much.
In my opinion, this looks WAY better than 3 huge pipes!!
Wish I had dyno numbers for unorthodox chopped pipes.
Maybe the HP loss is not much.
In my opinion, this looks WAY better than 3 huge pipes!!
Re: How Are These Pipes Made?
I designed one for the RZ350 and Glyn built and tested it and it was about 15% down on power to the normal 2-2 systems but made a great sound lol.
Re: How Are These Pipes Made?
Thanks, Kenny. Good info.kenny wrote:I designed one for the RZ350 and Glyn built and tested it and it was about 15% down on power to the normal 2-2 systems but made a great sound lol.
I actually remember that pipe and evaluation. Wish there was more info like that.
Finally found someone in my part of the world to make custom pipes. Drove over 14 hours in one day to get the first bike to Jeff Henise. Starting with stainless gp pipes. Will have some one-off touches to the pipes I haven't seen before.
If things go well, titanium pipes next.
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Re: How Are These Pipes Made?
glad you are up for a big drive, look forward to seeing the pipes
Re: How Are These Pipes Made?
I like one-off touches!!Smoker wrote: Will have some one-off touches to the pipes I haven't seen before
Re: How Are These Pipes Made?
Keep in mind that Kennys 2-1 looked like a 2 stroke pipe and that pic above is justp pure crap.
I bet it's at least 50% down on the already low stock performance.
I bet it's at least 50% down on the already low stock performance.
Bye
Martin
Martin
Re: How Are These Pipes Made?
I thought I heard that twin cylinder snowmobiles with a single pipe had better mid range and less peak hp.
Re: How Are These Pipes Made?
Yes, with a pipe.
But performance wise that pic above is plumbers work but not a twostroke pipe.
But performance wise that pic above is plumbers work but not a twostroke pipe.
Bye
Martin
Martin
Re: How Are These Pipes Made?
Someone, please explain these pipes.
Why have I never seen this done before?
Why have I never seen this done before?
Re: How Are These Pipes Made?
It's common on snowmobiles. I think they are ugly and that's why you never saw them on bikes. I think the exhaust needs to exit somewhere between the largest part of the pipe and the back. I am a little surprised we never saw them under the seat on these 4 cylinder bikes.Smoker wrote:Someone, please explain these pipes.
Why have I never seen this done before?
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Re: How Are These Pipes Made?
Doesn't having an exit forward of the convergent cone defeat the purpose of the pipe's design? If the pressure wave has an exit before the convergent cone won't that mean some of the pressure wave will exit at that point and, thus, not all of it will be reflected back up the pipe toward the exhaust port?
And yes, it looks rediculous.
And yes, it looks rediculous.
Re: How Are These Pipes Made?
Right.
Didn't realize that the rear of the pipes are probably closed.
Those cans are probably silencers.
I think I've seen something very similar in the past.
Didn't realize that the rear of the pipes are probably closed.
Those cans are probably silencers.
I think I've seen something very similar in the past.
Re: How Are These Pipes Made?
Interestingly my Nitro RC cars had pipes like that. Little suckers screamed around at 25 to 30,000 RPMs. Fun stuff.
I would never have thought I would see that design on a motorcycle.
I just recently sold those toys.
I would never have thought I would see that design on a motorcycle.
I just recently sold those toys.
Ken's Garage YouTube Channel
https://www.youtube.com/c/KensGarage1
1985 RZ500 (R6 suspension & body work)
https://www.youtube.com/c/KensGarage1
1985 RZ500 (R6 suspension & body work)
Re: How Are These Pipes Made?
Nobody said the stinger has to be at the end.
It's even quieter to have 'em like that.
Other possibilities would have the last cone pointing not rearwards but into the straight section and having a big dia flat ending.
Have a look at kart twostrokes where design space is limited.
It's even quieter to have 'em like that.
Other possibilities would have the last cone pointing not rearwards but into the straight section and having a big dia flat ending.
Have a look at kart twostrokes where design space is limited.
Bye
Martin
Martin
Re: How Are These Pipes Made?
Here's a more recent one by Shearer.kenny wrote:I designed one for the RZ350 and Glyn built and tested it and it was about 15% down on power to the normal 2-2 systems but made a great sound lol.