[mgarblik]

We had Edelbrock and Tiger heads that looked allot like your before pictures when we were running the Grocery Getter. Just not allot of real estate between those seats. The copper beryllium seats hold position long after the aluminum is softened and blown out. The fix for us was to completely ignore the "experts" who were guiding our tune-up based on Chevy combinations. After melting 40 pistons in one year, we began taking out large amounts of timing and the problems went away. Every time we took out timing, the car went faster and lived longer. We kept taking it out a couple degrees at a time until the car finally slowed down. That ended up being total timing of 6 degrees BTDC, spraying 600 HP of nitrous in Tiger heads. The digital MSD box allowed 25 degrees of retard and we used 24 of it. Base 30 degrees, 6 degrees down track.

I fully realize, you are twin turbo and there is no direct correlation between our nitrous tune-up and your ultra sophisticated turbo set-up. But just like our engine, your's is telling you something. It doesn't like that much timing and it is melting the aluminum. We were just amazed each time we reduced the timing, the car just loved it. Best of luck with the tuning process.