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Old 03-28-2002, 11:37 PM
bobbyv bobbyv is offline
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Join Date: Aug 1999
Location: ajax, ontario, canada
Posts: 773
if you exceed the max engine speed, you will have valve float and if it is an interference engine (i dunno about the M103 and M104), your valves will make a high-speed, spectacular, and expensive acquaintance with your pistons.

usually, there is a margin of safety between the redline and the real max engine speed (which is higher than redline). This is because, although the computer controls the engine speed via the fuel supply, it cannot prevent an over-rev if you downshift into a lower gear that will make it exceed the redline (those are the marks on the speedo corresponding to the gear#).

beyond that, the forces of the reciprocating masses (pistons, con rods) will cause failure somewhere.
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