So the car will not go over 6000 RPM. It acts like it is hitting a rev limiter. But the limit is 6800. Spark is consistent and fuel looks good. mass is perfect. the car has 108k miles. I dont know what is up! Has new spark plugs and wires. Now the on the last pull it made 385rwhp and 355tq@ 6k rpms. but it puffed white smoke... or so one person said was. I did not see. Now the tuner is calling it a Head gasket. The car is running hot. BUT IT DOES NOT HAVE A THERMOSTAT. It has pro chargers plug/blocker. Takes the car FOREVER to heat up. and it is 117 out side. I cant tell if there is oil in water or water in oil.... any idea's? I was going to pressurize the cooling system and see if it leaks. The car had 9 pulls and only the last puffed "white" smoke. The other 8 did smoke but thats cause it hit the unknown rev limiter.(SMOKE WAS BLACK) IDEAS?