I had this guy http://ekotuning.ca/ come and tune 4 tractors for me. He brought a mobile dyno with him and he tuned a 8220, 7820, 7830 and a 7130 for me. All I can say is wow, it's like they are totally different tractors now. He gave the 7130 25 pto hp, the 78's close to 60hp and the 8220...