Cool28

iTrader: (2)

Ok I had some tuning done awhile back and it was good back then. I have since added a th400 a big stall and a rear. I have all the trans codes since the trans isnt hooked up any more. also I believe not looked at but was before had timing down as low as 14-15 degrees at wot(false knock that I cant get rid of for the life of me). Also had it dyno and a/f taken. Ok it peaks at 5250 rpms then flat lines from then to 6500 where he let off. One the street anything less then wot is tire smoke but at wot it slows down alot. I was wondering is it cause timing is so low or other issues or a few at once. I have TR6s gapped a .040. I have a twinturbo pushing 7-8psi. I have not checked my sparkplugs but the way its runs sometimes they probably need to be changed. also do you think it could be weak valvesprings? its been siting on off for about 2 yrs. when its is running its beat hard .