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Message: [QUOTE="Charles, post: 609013, member: 103"] I would rather have a smoother idle and a wisp of blue come by the cab every now and then rather than a little bit harsher idle with less haze. I haven't put enough effort into it to try and get both. And I probably never will as a little idle smoke when the engine's been sitting just doesn't warrant my attention thus far. I will say this.... running around at a fixed 20 degrees of timing the truck had less idle haze, and less off-boost smoke. So contrary to what I like... I may have to increase timing at low ICP to combat this. The cruising EGT was only 450 to 500 at 50mph on flat ground yesterday with the high timing. That has to be more fuel efficient, and I highly doubt 20 was "optimum" anyway. I know the smoke was much worse this morning on cranking with my usual timing table back in place. I will also say that right now I'm running 400/400's with a 15* OBS pump as a single, and a 38R/GT55 combo, and this truck LEAPS up on boost and blows tires off like nobody's business. Like... immediately upon stabbing the throttle the tires are spinning. And that pump is only managing 2500 to 2600psi. The amount of smoke per get the *** down the road right now is astonishing. I can blow the tires off like nobody's business, and actually accelerate to the point where the tires are juuuuust starting to spin in each gear, then look back at about 60mph or so after just leaving from a stop and there will be nearly nothing in the way of smoke back behind me. On a single OBS 15* pump and a 94mm first stage charger... With attentive tuning a 400 can be a street dominator. Even so-so tuning like I'm dealing with right now. If you really sat down and nailed down a file, the results really should be awesome in terms of power per amount of smoke, response and temperatures. [/QUOTE]