Quote:
Originally Posted by misfitsfreak81
well the motor is down due to what i believe to be a malfunction in tuning. pretty sure that the motor will go boom when reving to 7500 @ 12psi with timing locked to 15degrees. someone correct me if im wrong or back me up if im right. pm me if you want more details.
crushed #4 rod bearing wich took out the other bearings in the bottom end, screwed the rod and the crank ect.... soooo its back to square one with another rebuild on the way. gonna go 87mm pistons, forged rods and possibly a stroker crank. block is going to the machine shop on sat to get punched and line honed and the head is getting a reworking that has nothing to due with the bearing letting go. ill keep this updated hopefully with pics when i can.
Mike
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15deg at 12psi is pretty conservative, actually.
something else is wrong. the only place you have less than 15deg timing at 12psi is <2000rpm....which you cant make that much boost at.
only thing i can think of is bad cas adj, bad assembly, bad bearings, bad lubricant