Y’all are killing me. Lol. So there are no low compression heads. Is that what I’m hearing. I was just told there were. My compression is lowest around 95 and highest around 105. I’ve been told that 55mph and 5400rpms with a 25p shooter is all I’m going to get out of that motor. I just don’t k no one why my buddy is getting so much lore speed out of his gt150 with a 27p shooter on it.