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Message: [QUOTE="sonic blue l, post: 1184371, member: 5185"] So would de lipping lower fuel economy? I know there are benefits, such as when tuned and the timing is advanced the burn comes out of the bowl, thus torching the lip. However the lip does help promote a more complete burn. Also tuning wise one could spread the burn out a little more. (mind you that's whats being done to begin with, hence the star pattern, now you would be more in the bowl, well kinda of as you opened the bowl up) Then you get into injector spray pattern and that would change how you would want the bowl too. Bottom line is for a race motor I would do it, but on a daily driver with a tune im thinking no. Or a slight delip to compensate for the tune. Now since the ih pistons have a thicker edge, do they also have a bigger bowl in the piston? Just curious if the bowl diameter in a ih piston vs a factory piston would be more likely to keep the burn in the bowl vs outside causing the edge to be torched. Thanks [/QUOTE]

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