o.k. ,

Charlie Chang miss machined a abc piston on a FSR 40 Magnum , However the Liner fits the FP case , bar the locating pin . its 35 Deg out .

As the IRON FP 40 ( series One ) piston fits the Magnum ABN liner nicely ( its loose in the FP one - will push straight thru - not sure if Castor & a bit of ' lacquer build up ' will sort that .  )

What would be the dreaded consequences of running a IRON piston in a BRASS / NICKLE sleeve ( if its brass ) so actually ,

it;d be a I B N , if were being fussy .
 

Thanks .

was thinking the expansion might be trouble .

As theyre both scrap , I may well ' see what happens ' , as the cold fit is just about right .
Either that or see if castor will ' lacquer up ' the piston to a good fit in the std. liner . Sounds like carrying the optimism a bit far tho . 

Reading Peter Chinn stuff on OS's ( Specifically the FSR 21 Car Engine , this ' nickle cooating ' is ACTUALLY ' Nickasil ' .

Where its silicon impregnated nickle , so very hard - but only about three microns thick .

As it has a good ? reputation in automobiles & motorcycles , Mercedes even use it now , good air filtration seem like a requirement ,
as airbourne dust would be abbrasive , that and wrong / inadequate oil seem to be the problem , rather than the liner itself.

Though CHOME is much deeper ( thicker ) and more tolerant of other inadequacies . So generally more durable .
Sounds like if youve a good A B N engine , the flitered intake is likely a prerequisite , if its dry'n dusty at the flying site .

Of Course , if anyones got a good / new FSR 40 Magnum Piston , . . . . lemme know , please .