Was the liner always there?riff_raff wrote:Seems strange that they use an aluminum piston and a steel bore sleeve. I can see the reason for using an aluminum piston, both in terms of reduced mass and heat transfer required from the gas compression heating occurring within the cylinder volume. Would be interesting to know why they use a steel sleeve in the aluminum cylinder housing. There are very durable coatings like Nikasil that can be applied to aluminum, which would seem to be a better option than using a separate steel liner in the aluminum housing. But I'm sure the guys designing the system knew what they were doing, and had a reason for making it like that.
http://www.racecar-engineering.com/wp-c ... orth-2.jpg
My eyes are not great but I cannot see it here, nor the top flange, gap & retainer ring.