I've tried two different modules and coil packs. I've tried gapping the plugs at .025 and it ran like crap. I set the gaps back to .030. Today I bought some fittings so that I can hook a pressure gauge up to the header, before the turbo, to measure the back pressure. I just want to rule-out a back pressure problem. The next test I might do is set the lifters to zero lash, just to rule out defective lifters that may be prematurely pumping up. This engine does not RPM past 5850. Peak power is at only 5200, and should be closer to 5600.
What is also puzzling is that switching from pump gas, 20 psi with 18 degrees of timing over to race gas, 25 psi with 23 degrees of timing only gave me a 2 MPH gain at the track. So there is definitely a 'wall' that I'm hitting.