turbo plug?
why do you think it is turbo plug related my only experience with turbo plugs has been good,on the other hand changing crankshafts (as i have done) seems to be a problem as i am having trouble tuning an engine with the same probs as you seem to be having but im reluctant to tune my motor as has been said on this thread as i havent come across a nova that needs to be that lean on the bottom end that said if that is the only way to get the tune it is a compromise and doesn't seem to say much for the novas compatability for the crankshafts and the new piston&liners(s3)