So I pushed my motor a bit more than I intended. Long story short I have a transmission controller and now that I converted the car to an automatic (could not get a manual to survive) I have been playing with locking the torque converter (fluid coupler). At the quarter mile, worked like a dream. Feels like a shift to another gear...powerful and great for my elapsed times and trap speed. Well, I tried the same at the standing mile last year and I had a different result than I planned. Basically, I use overdrive in the standing mile and when I finally got the transmission to take OD (4th gear for me) by getting out of it and bumping it to neutral and back, it made crazy power and pulled like I've never felt her go. That was the good part. The bad part is it excited the turbos more than planned and she made more boost at the manifold than I expected. Result...I raised the heads.
So if you haven't seen this before, imagine all they dynamic cylinder compression created by the piston stroke with the benefit of turbo compression flaming out the side of the head/block area. Basically...a blow torch. Managed to get the car safely to a stop and aside from a bit of fire suppressant to ensure the smoking under the hood was not fire, not too hard on the motor/car.
But I did do this to the heads and I wanted to share so you could 1) see what it looks like if you haven't before and 2) see some craftsmanship the gent that made these for me does on heads. Basically three steps thus far: my trashing them, welding and rough machining, and then cleaning them nicely. Note on the last step the chambers have been "softened"...there's an edge within the chamber if you will. That's for quenching and better handling the heat from boost and avoiding pre-detonation.
vroom vroom...
HS