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my engine saw redline in the first 100 miles...all my engines (most of which I build personally) see redline either during breakin on the dyno, or in the first 100 street miles, an understanding of metalurgy and the surface finishes in the bore will tell you why this is not only OK but preferable.
Break in is the period of time where the motor "seats" the rings to the cylinder walls, repetitive friction on a surface "work hardens" the material, what you ideally want is the rings to use the minimal abrasive action from the cylinder finish hone to normalize the ring shape to the individual cylinder wall, this requires cylinder pressure to force the rings against the cylinder wall, WOT and high rev's create cylinder pressure. and are therefore REQUIRED to create the best ring seal possible, before you work harden the cylinder walls and the ring faces. (which are already appreciably hard)
There once was a time before what is known as plateau honing, that you could wear out the hatching left in the cylinder with too much cylinder pressure during break in, but those days have long since past.
So why is there a break in procedure then (because i know you all think im stupid by now...obviously) well because the Manufacturer knows that you will still get an acceptable ring seal driving gingerly, worst case scenario you lose some cylinder pressure and a few HP, maybe burn a bit more oil consumption (with a mfg specified 1000 mile break n procedure) but the manufacturer has a lower chance (albeit slight) of brand new car engine failures. Also the clutch really does need about 300-400 miles of nice easy engagement without significant shock to ensure optimal life.
Take with a grain of salt, but remember always that corporations rarely have you or your property's best interest in mind, when they write literature, it is to cover their ass...not protect your investment.
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