Thats very interesting! I guess that L16 would have seen similar rpm to my engine will (ie 7500 normal to 8000rpm on mistakes).

Feral, would you say 0.6mm squish would be a smart aiming point for at 8000rpm a-series with cast pistons?

Also, you still haven't said what octane the fuel was that derived the 8.2 dcr figure. Is this a secret of yours ?

Does anyone know a good source of cheap forgies?

Also, I'm surprised to see that Desktop Dyno reports power gains for my engine by going with a smaller cam. It's currently got a 320degree (i&e) cam. It seems to peak around the 270-280 degree mark! But the racers I've spoken to so far run bigger cams than that! Ideas?

I've checked out the mopar link! Extremely good read! - Thanks. Though, I have seen the cam timing v's c/r article before.

What are thoughts then of making an offset dish in a piston. I think the original A15 pistons I through out had an offset dish. The idea being to provide a squish with maximum flat piston area, and still have a dish.

When compared to a flat-top piston and standard head chambers, I see the advantage of obtaining small squish clearance, and unshrouding the valves as much as possible, as the piston dish will allow more meat from the bottom of the head.

The disadvantage is obviously running a piston which unbalanced about the piston pin's axis. This will increase piston side wall loads and heance piston-bore wear.

Also, as I don't have a standard engine anymore, does anyone have actual figures for the following:
- Standard deck height of A14/A15?
- Standard combustion chamber volume?
- Standard piston to block clearance?