Running a ‘98 carb 2.6L VMax 150 on a Champion 186. It’s rated for a 175. I was wondering what the actual difference is between the 150 and 175. Is there any way to gain a decent amount of power without hurting fuel economy (which is already bad) and having to run premium gas? I understand the Hydro Tec phase kits are nice, but not sure how much I could gain. Just wondering what options I have and how they will affect the things already mentioned.