Blew my motor up last March and had it rebuilt at ATS. Rebuild had some problems and Clint at ATS stepped up to the plate and installed one of his project motors with most of the bells and whistles. Problem is the rebuild and this project motor sound like a pro-stocker when revved in neutral, runs real rough and will even try to backfire. Both motors had my P7100 on it. Scheid cranked up the pump a while back and I added the 3k gsk. Clint has the timing up to 26.5* to smooth it out but I'm just wondering what is causing it. Soon as it gets any load on it it smooths out fine. Anybody got any ideas?? :-

 

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