Quote Originally Posted by Big Baller
Quit being a fucking cheap ass and buy a wideband, the only thing you can tell from plugs is how rich it was when you stop the pull, you have no idea how lean it is in different load zones....you sound like someone should be tuning your car....besides you.
A wide band doesn't tell you if you have too much timing. Optimal a/f ratio for different engines will not be the same either. A wide band is only good for driveability tuning, and is not an accurate way of tuning an engine with a power adder. Being "lean" is the last thing you need to worry about. Too much timing is what kills engines.