So you want to run cast iron pistonrings in a cast iron cilinder...

[frankydevaere]

According to this paper...http://www.aa1car.com/library/ar293.htm...

only flaky graphite cast iron ( = pearlitic lamellar ) piston ring are allowed in standard grey cast cilinders ( witch is also flaky graphite ).

So , one may not use ductile (or nodular ) piston rings or steel piston rings.

Where can i find such springs 40mm diameter ?

 

[Blogwitch]

I think you will find that for what we get up to in our little shops, 99% of what is new and relevant to full size engineering can be totally ignored, at least for the first few years.

We just don't have the facilities or metallurgy departments that they have, so most of the time we make do with what we have, and what we can understand.

KISS really is the best way for us to work most of the time.


John

 

[Jasonb]

Why not make them, easy enough from a bit of CI bar. Does it have to be 40mm? 1 1/2" 38.1mm are readily available from model engineering suppliers.

J

PS put your rough location into your profile so we don't suggest suppliers on teh other side of the world.

 

[frankydevaere]

Yes, 40mm is what i need.
I ran standard steel springs and the cylinder bore is worn-out now , loosing compression.

 

[frankydevaere]

anyone familiar with these ?
http://www.baileysonline.com/itemdetail.asp?item=PRS 4012&utm_source=shopping&utm_medium=cse


what kind of iron are they made of ?

 

[Admiral_dk]

Standard size for old Yamaha FZ-50 moped - have a look at 50cc engines.