Originally Posted by
madweazl
No offense to other tuners but there are some people that have been running nitro for ages that couldnt tune if their life depended on it. I cant imagine something on the car enabling it to run at less then full throttle ok but kill the engine at full throttle with the exception of the clutch bearings, shims, shoes springs, or flywheel. Check those things out and report back
I know both people that helped Mason on sat and both are experienced tuners. And since he had exactly the same issue with both engines I doubt it's a tune problem. It's the tank lid Mason, pull the tank and do a pressure test.