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One problem with that. (more) (archive)

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Posted by Jon on February 27, 2001 at 21:48:25:

In Reply to: Different point of view. posted by Lee on February 27, 2001 at 19:17:47:

It seems like most cars that spend their whole lives in the lower revs, somehow lose the ability to rev freely.

I don't have an explanation for this but I have seen it a lot. For example, my wife bought an 80,000 mile Datsun 510 from her grandmother's neighbor when she was in college. The car had been meticulously maintained and had no mechanical problems, whatsoever. The only problem was that it had a 7000rpm redline but REALLY didn't like revving past 4500 or so. That's how the old man had always driven it.

I've had mechanics tell me to break in a new car like you plan to drive it (within reason, of course). I assume that's why.

If anyone has an explanation of this phenomenon, please share.

-Jon


For sure, the maintenance level does help, but there is more.

You all know that a race engine that spins continuously at 9-10k rpm has a short life span, maybe a few hours. On the other side of the spectrum, you find big tractor-trailers that rev at 2k rpm and will last for millons of miles.

My point is that the higher at which the motor is revved, the shorter its lifespan. Exponently.

So, an M3 engine that has been driven on the highway all its life and has been spun at 5k rpm will last 200k miles. Do not even hope to get the same results with an engine that has been raced...





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