fiatfan
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- Joined
- Aug 9, 2015
- Messages
- 486
Nikasil works well on an iron bore. It wears better than iron and dissipates heat better than sleeves.
Nitriding also works but you can not repair a worn or damaged bore -only make it more wear resistant.
Sleeves are spun cast in either gray iron -similar to the original barrel without the porosity problems of gravity cast
or
Nodular iron which is much stronger and more wear resistant than gray iron.
Nodular iron liners are tough on standard Norton iron piston rings but work well with chrome rings.
I just installed a pair in Sir Eddies Rocket engine.
.080 over pistons are fine in most 850 barrels but some barrels with a little extra core shift may end up with thin spots or cracked spiggots.
Sounds interresing this, but for me it comes down to what the cost will be. Turns out noone here in Sweden does Nikasil treatment, they send th barrels to the UK or some other place in Europe. And sending this 9 or 10 kg lump back and forth won´t be cheap.....But then again nothing is, so....