do all levels produce alot of smoke, or just the ones with timing?
Smarty will make smoke, but you can easily control it with the throttle, unlike big injectors that are very difficult to run clean. I've never ran level nine, but on seven or below, you can drive around with NO smoke, but if you stand on the throttle before boost is built up, LOOK OUT! Smoke CITY! I really like that way you can drive easy and not look like a freight train, or when the need arises (like passing a powerstroke), you can add insult to injury and pour the coal. :-laf