On TVT's website he sells the SL55 fuel pump and states no tune needed, I don't want to start playing the the fuel regulator itl get tricky and expensive. On my runs down the q/mile the other day at the top of 3rd gear it delayed changed I dont know why but I'm assuming lack of fuel. My plan was to get the walbro pump from Needswings and the injectors from TVT an hopefully that will fix my problem.