Toliski Posted October 2, 2018 Author Report Share Posted October 2, 2018 Tomorrow or the day after I will have some news and photos of the pistons. Here is what happened! At the end of the video you will see the smoke. After that a lot of smoke at cruise and working on 3 cylinders. https://drive.google.com/file/d/1wYbxBeEU5zQdG3UZTgzucTKsAhz5jTYY/view?usp=drivesdk Quote Link to comment Share on other sites More sharing options...
Toliski Posted October 4, 2018 Author Report Share Posted October 4, 2018 Take a look guys. Melted pistons! Pic 1 https://drive.google.com/file/d/1KVpck_dZ_xln5P2RLmL7tpQXz0ILrXqK/view?usp=drivesdk Pic 2 https://drive.google.com/file/d/1RZUuRiRQRKINjiotywTUxR-cDO6pqJnT/view?usp=drivesdk Pic 3 https://drive.google.com/file/d/11TxsGGByVTxgs9bZjzQqYq25kDCykA08/view?usp=drivesdk Quote Link to comment Share on other sites More sharing options...
cj Posted October 4, 2018 Report Share Posted October 4, 2018 Have you got some pics of the side of the pistons as well? It doesnt look like the sides are scratched up which is where you'd normally expect to see damage, just the front/back which is weird. Is the damage to them all on the fronts, or is it equal front and back. Is it all the pistons or just one? Have you got the crank out too? How do the thrust bearings look - aka does it look like the whole crank has walked forward/back? Quote Link to comment Share on other sites More sharing options...
motomattx Posted October 7, 2018 Report Share Posted October 7, 2018 Thats detonation damage causing the rings to get pinched, what fuel were you running? Quote Link to comment Share on other sites More sharing options...
Greg W Posted October 7, 2018 Report Share Posted October 7, 2018 What ring end gap ? Quote Link to comment Share on other sites More sharing options...
Leiden Posted October 7, 2018 Report Share Posted October 7, 2018 I had a look through the tune and it isn't the best, your part throttle fueling is all over the place and acceleration enrichment is off as evident by large lean spots after throttle changes in the log, could have been transient knock hammering the pistons, are there scuffs in the bore at tdc? Quote Link to comment Share on other sites More sharing options...
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