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#38117
foot_doctor
Participant

    No need to worry about the additional clearance. We have regularly increased the connecting rod big end size by .002" for several of our racing engines. No adverse effects have been observed. The engine may "rattle" a bit more at idle, but it should not fail if the journals are round. Most formerly stock engines that were repourposed for racing, have been loosened up in that fashion. Looser, sloppy main bearings also add to the performance levels without adding to premature failure. Tight motors are simply quieter. R.T.