Another APR TVSr1740 kit blowing an engine. Fried piston rings.

[sakimano]

http://www.audiclubsa.org.za/cgi-bin/yabb25/YaBB.pl?num=1428549092

Ok, I am going to try and keep this short, as it is quite a long story.

After car was taken on a flatbed back to the agents off the Supercharger, it came to light that there was no compression on 2x Pistons. So, they wanted to charge me to strip and see whats wrong - they felt they were not at fault.
Basically they said, I did not inform them the car had a chip done, and I said I informed them. But I told them, regardless if I informed them about the chip - they must have done some sort of air / fuel ratio logging after supercharging a car etc. This would have brought to light that the car was not getting enough fuel.

Ok, so with the supercharger agents not wanting to take responsibility, I had the car sent to the only person / Company I knew that could fix whatever broke. On a flatbed to Venom Racing in Witbank.
At this stage I was still hoping that this was something small…

I instructed Venom to take photos / notes of the whole stripping process and to find the cause of the problem as well, as I was getting this sent through to my attorney to take things further. I felt that there was definitely negligence involved here.

and the analysis from his shop

[quote]Once the heads were removed we could see more and get a better idea of the actual damage. The damage were major. First we noticed the damaged o-ring on the high pressure fuel pump.The o-ring were partially melted due to either excessive heat or was damaged when fitted. Upon inspection its visibly clear that the left bank suffered more damage than the right. Piston no 1 were running very lean and combustion abnormality associated with abnormal high combustion temperatures occurred in this cylinder. The aluminium on the head was burnt clean and the piston surface was also burnt clean, the aluminium suffered flame erosion. This corresponds with the spark plug condition of cylinder no. 1.

Piston no.2 however suffered far more damage than cylinder no.1. This piston suffered to the point where the rings can be seen and the rings got burnt through. Also the skirt of the piston broke off. The cylinder side wall also known as the sleeve got burnt and damaged in the process. The cylinder head material also turned porous in this cylinder. Failure of this cylinder is due to very lean fuel mixtures combined with boost (compressed air). Flame erosion destroyed the components in this cylinder.
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