Over reving a Trihard T120R

[groily]

The flakes of molten piston got absolutely everywhere even into the cranks sludge trap
John

That would be my worry. Maybe just my paranoia, but for peace of mind I'd feel obliged to hoick the crank, get the rods off (measuring sticks at the ready),  flush everything out to within an inch of its life, etc, just to be sure. Time-consuming, carries the cost of extra consumables and maybe more if the journals have suffered or if shells are replaced while it's apart. But not I think a waste of effort even if there's nothing to see.
(I say this because a long long time ago I seized a piston on an A10 and particles had got pretty well everywhere just as John describes. 'Paranoia''s been my middle name ever since.)

[limeyrob]

I too have seized an A10, the piston sized, pulled a skirt off the block then reduced it to flakes by hitting it repeatedly with the big ends.  I felt the engine tighten and hit the clutch very fast so all the damage happened in a second or two.  I was still able to rebuild it and its still going now but it took a case repair, replacement cylinder, rods pistons and a lot of cleaning.
Good call about the petrol taps, easy to overlook the flow at full throttle.  I see there's a mod for Concentrics to up the flow through the float valve.

[muskrat]

  I see there's a mod for Concentrics to up the flow through the float valve.

G'day Rob.
I used that mod on my A7SS racer. At 11 MPG on methanol I could have run the fuel hoses straight into the inlet tract
Cheers

[limeyrob]

run the fuel hoses straight into the inlet tract.  Isn't that called a Wal Phillips Injector?

[muskrat]

G'day Fellas.
Had a real good look at the barrels today. It looks to me like the barrels cracked first studying the wear marks. As I said the flange nuts weren't tight but the head steady was. Vibes/flex too much right wrist  What I have noticed the outer wall thickness is thinner on that side. Sort of worries me of boring s/hand barrels to +60.
I know from machining castings/forgings their not exactly the same and when set up on the horizontal borer may be a mm or so off. Or like I said using the head surface to bore instead of the flange.
Cheers

[muskrat]

G'day Fellas.
I forgot to mention, I pulled the crank flywheel bolt that holds the sludge trap, used my endoscope to see there is phu(k all in there. I then back flushed with oil then air. Nothing came out I wouldn't put on a sandwich
Cheers