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I’m trying to help a friend’s friend and any opinions would be appreciated.
Iron block with Trick Flow heads, studs, Cometic .060 MLS gaskets. Procharger, blow through carburetor. Ignition coils inside, MSD wires through a hole in the firewall.
700 RWHP. Engine well built by an experienced shop. Proper torques, deck surfacing, head gaskets on correct, etc. All new parts.
This cylinder blasted right through the head gasket, grooved the head and DENTED the intake valve face. This happened on a chassis dyno during a pull.
I have my own theory but I’d like to see what you guys come up with.
Detonation would be my first guess although the combustion chamber doesn't show it. I have a 6.0 that I bought that first torched a head the same as that, Then once the head was repaired was put on the dyno again with the same tune and that time it broke a main cap and took out the crankshaft. (most likely happened along with the previous damage and not caught at that time) They had 27* timing @ 15lbs of boost.....I bought it after all this and still need to get it back together.
-Pistons looked clean but this cylinder was "cleaner", perhaps from all the coolant being sucked in. Lots of coolant out the exhaust.
More info. This motor was making 700 RWHP which I guesstamite is 850~900 at the crank. Cast crank, stock powder metal main caps. With this power, he's gonna have bigger problems down the line.
Now, I was looking for opinions before expressing my own opinion. I also think there was some crossfiring from the ignition wires being together. The owner is going back to valve cover mounted coils.
05-14-2016, 11:36 PM
Blown head gasket-and head, opinions wanted. 
