Cracked Pistons (Pics Inside)

[CDNTurboZ]

Today I had to steal the crank out of my shelby charger's motor so I can use it in my daytona's block.

When I started to take out the pistons and rods I found some cracking on #1 and #3. Once the rings were out they just fell apart:

http://www.turbo-mopar.com/forums/photopost/data/500/medium/Picture_0062.jpg

http://www.turbo-mopar.com/forums/photopost/data/500/medium/Picture_0013.jpg

http://www.turbo-mopar.com/forums/photopost/data/500/medium/Picture_0033.jpg

http://www.turbo-mopar.com/forums/photopost/data/500/medium/Picture_0041.jpg



I am assuming detonation caused this?
I was running 11 psi using 87 octane. Car had 103xxx miles on it, (stock 86 TI) I am thinking this is why just before I stopped driving the car it felt like it had very little power compared to when I first got it.

Its no big deal as the car had been put into storage, and the motor needed a rebuild anyway, but at least now I can say I broke my first set of pistons:p

[turbovanman²]

Yep, detonation and yeah, running 87 octane at 11 psi probably did it.

[shadow88]

but at least now I can say I broke my first set of pistons:p


You only broke 2. It takes a very special talent to break all 4 at once. :eyebrows:

Good luck on the rebuild.

[BARRON]

They were showing massive blowby(the scorching all the way down the skirts)

It was time for a rebuild for sure.