i have the same motor in my eight and i havent really had any problems with it yet . my only problem i have and its not really a problem is once i run it same like you. i get it dailed in kill it , it cools down ,then its a little hard to start like it doesnt wanna lite right away , sometimes it wont lite i ll let it sit for a sec then hit it on my box again and she comes to life. other than that she runs like a scalded dog! the only difference is i run a med/cold odonnels plug with 30% tq