piston destroyed by det
Turbo Mini Forums

intresting pic here , though not too clear, sadley

its from a motor a tore down for a customer some months back
just shows you how destructive detonation can be
although this if far from the worst one i have seen

Edited by BENROSS on 8th Jan, 2008.

I deffo see a pattern emerging with relation to the damage.

Most of the time the damage is where there is no coolant jacket to speak of, where the bores are 'siamesed'

what would you say?

Hi,
Makes sense, that would be the hotter part of the bore.
Cheers,
Gavin :)

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and right above the exhaust valve
Regards
dave

maybe sodium filled valves arent ott then?

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

Joey, I may be totally off track here but I think the sodium filled valve stems are more about protecting the valve seat face than preventing detonation.
what do you think?
Regards
Dave

havent a clue, was a bit of a stab in the dark!

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

I like to stab in the dark!!! but then again it's quite good with the light on!!
Dave

All depends on what your stabbing...beauty is only a light switch away!

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1/4mile in 13.2sec @ 111 terminal on 15psi

Sprocket,... bat. i would agree!

on examination the two inner bores have taken most of the punishment

pays to go a tad rich on the mixture to cool the piston crowns

matty, have you worn many light swithches out ...??????? ..Lol i have over the years

Ooooh raunchy.
Ive got pistons exactly like that in one of my blocks. However supposedly it still ran before.

Edited by Jordan on 8th Jan, 2008.

Back once again like a renegade master

shill the fuel like F1 cars :)

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!

I have this one in the garage, mm, nicely bent oil ring

WTF! worst i have seen sprocket
what was the history of the motor ?

any other pics Gents ?

It was a standard MPi. My guess is that the driver proceded to use the car when the cam sensor had failed, resulting in non sequential injection and on the MPi, thats bad!! I have seen melted cats and all sorts of crazy stuff. The rings are slack as Norra Batty's stockings, the pistons litteraly fell out the bore. I also recon it was a high mileager with little care. Bores are shinier than a highly polished mirror. Its them Rover long term oil changes

I think it was pre igntion rather than detonation that did this damage though

It had little chance

Its them Rover long term oil changes ........LMAO!!!

That picture from bud666 is the best IIRC.