Fire Pistons

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Nemisis

Settler
Nov 20, 2005
604
6
71
Staffordshire
I've been looking on the web today at fire pistons and fancy having a go at making one is there an ideal maximum inner diameter to the chamber?Also whats the ideal depth of the chamber?
Thanks Dave.
 
Hello....
A friend suggested that the compression ratio should be about 18:1

The pistons that I produce have a bore diameter of 6mm and a piston legth of 74mm.

John :)
 

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