Expansion chamber info.
Posted: Thu Jan 26, 2017 3:14 am
I apologise in advance for going slightly off topic here, but I figured someone here might have the info I am after.
I am in the process of acquiring a 1958 Jawa 250 single. Now these are a bit unusual in having a single cylinder with twin exhaust ports and pipes.
Because of this, they have 2 seperate pipes and mufflers.
The intention is to do what the factory did, and convert the std road bike into a ISDT replica.
As it doesn't currently have any mufflers, I want to fit twin expansion chambers, which the factory also did.
Does anyone have any clues as to how to design a pair of chambers that are fed by a single cylinder?
I actually seem to remember that Suzuki did the same thing in the early 60's with one of their early motocrossers.
I have most of the books by Jennings, Bell , Blair etc and none of them go into this subject.
Any help you can give will be muchly appreciated.
Regards
Andrew Holley
I am in the process of acquiring a 1958 Jawa 250 single. Now these are a bit unusual in having a single cylinder with twin exhaust ports and pipes.
Because of this, they have 2 seperate pipes and mufflers.
The intention is to do what the factory did, and convert the std road bike into a ISDT replica.
As it doesn't currently have any mufflers, I want to fit twin expansion chambers, which the factory also did.
Does anyone have any clues as to how to design a pair of chambers that are fed by a single cylinder?
I actually seem to remember that Suzuki did the same thing in the early 60's with one of their early motocrossers.
I have most of the books by Jennings, Bell , Blair etc and none of them go into this subject.
Any help you can give will be muchly appreciated.
Regards
Andrew Holley