I bought a carb from a member here. That bought the carb from a well know e-85 carb builder .It was not even close. After 5-6 trips to the track .I got it to work right. It is very good now. but did't do me any good. to start with ! I called and talk to who build it..would not help me with it. All he wanted was more money and send it back to him. Good thing I got help from others on it.