I know there are factory settings but with mods and all that, sometimes adjusting ignition timing to other than factory settings can help performance. I currently have mine set at 12 BTDC and it runs good with no spark knock on 87 octane. I was told by a particular tuner I can go up to 14 BTDC as long as I run high test gas. What are your thoughts on performance differences at different timing settings? Will ignition timing that is advanced hurt top end? I don't expect a ton of bottom end tq from a 5.0 so I'm wondering if there is a trade off. My point is, why would you want to make an adjustment that would compromise top end on a smaller motor such as 5.0 that depends primarily on top end to get the job done? I guess to be more specific. Will difference timing settings affect either top or bottom end power/tq?