I definitely have had a lot going on since I installed the engine. And as far as you sending info goes, I appreciate that and will keep it in mind for future reference. I didn't ask at the time because I didn't want to feel like I was begging someone to do all of the work for me. I wanted to be able to figure out things for myself, but I was having a hard time getting the ecm to do what I wanted. Ultimately, I had way too many issues to resolve before I could tune properly.
Even a stock Vortec can handle a little more aggressive timing curve. I am running more total timing at WOT in my car without any issues, but the rest of the table is pretty similar. Once you open up the ports a little and throw in a more aggressive cam, you will more than likely end up with a much more aggressive table. It is my experience that Vortec heads like more aggressive timing in low-to-mid range loads, but will only want 32-34 degrees of max advance under heavy loads. I think that this is where people get confused when trying to tune the ignition curve on Vortec headed applications. Of course, you also have to consider that, while it is good to be able to observe what the factory ignition curve looks like, there is always room for improvement as the engineers usually stay a little conservative for numerous reasons.Originally Posted by PJG1173
Bookmarks