Today I got good news, the problem is a bent valve on the sixth cylinder, pistons are fine. Must have bent the valve when assembling the head ...
. Since the engine is apart I've decided to do a full rebuild i.e. new piston rings, conrods and main bearings, valve oil seals, and so on
. I've ordered the parts and hope to have the car ready by the end of next week .
Ed, I can maintain a rich mixture with no problem with the current injectors (6x630cc) and Megasquirt. I can even get it into the 10-s with no problem (currently it's tuned rich ~ 11.0:1 at boost, as a rule I start rich when tuning and then go back), I can also pull back timing . The engine compression is stock 9.2:1