Brass or cast Iron

[Fingers]

Hi everybody I am reposting this question, if anybody can help me decide before I start making my piston and cylinder for Jan ridders Marc vertical flame eater. I will be starting these over the weekend. My question is this I am planning to make my piston from cast iron but I am still undecided on choosing brass or cast iron for the cylinder, I would like to use brass as it looks nicer but would cast iron for both work better ?
Cheers

 

[kcmillin]

I have no experience with using a cast iron piston and brass cylinder, but I have made brass cylinder flame eaters. I used graphite for the piston and the engine is an excellent runner.

Kel

 

[Fingers]

Thanks Kell i have decided to make it from brass, from the information i have gotten here it should work out.

 

[NickG]

Cast iron for both definitely. When it gets hot there will either be too much or too little clearance, causing the engine to stop working or sieze up solid.