>Why? The power peaks well below redline and the torque peaks below that.
>But the answer is that the red line is the masimum safe speed. Driving
>upto redline will not cause the engine to break (although exceeding redline
>may) but engine wear will be more severe at the higher speeds. On the
>other hand, one reason we own Triumphs is because we like overhauling
>engines.
The reason the TR four cylinder engine is redlined at 4800 is that there
is a nasty harmonic just a tad over 5000 RPM that tends to crack the
crank at the base of the flywheel mounting flange. The next big harmonic
is approaching 6000 RPM. With a little bottom end work you can have an
engine that handles both.
Some of us own Triumphs because we do not feel satisfied driving behind
someone else.
As I always say, reality is what you make of it.
TeriAnn Near Santa Cruz, California
My old car: 1960 Land Rover 109 owned since 1978
My new car: 1961 Triumph TR3A owned since 1986
"Who could ask for anything more"
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