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A couple of items on this thread:
"ClassicTuning10A.doc" has been arbitrarily renamed "Classic Triumph Tuning" in the Downloads area here.
Changing to a higher-performance camshaft (Super III, etc.) with no other mods will produce approximately a 10% increase in *peak* horsepower and extend the linear portion of the torque curve upward slightly. The peak horsepower after the cam change will move to around 7000-7500 rpm.
Modifying the filter box, rejetting, installing a "offroad" mufflers and a higher performance cam will produce up to about a 40-50% increase in *peak* horsepower at 8000-8500 rpm.
There are no cams currently available for the Triples that significantly degrade low rpm performance. Most of the so-called degredation of performance due to mods is the result of fuel mixture non-linearity.
Horsepower is a misleading marker for measuring engine performance since it's the product of torque and rpm (HP = (T x rpm) / 5252) and comparing peak horsepowers is like comparing apples and oranges -- they're both sorta round, but that's about it. From the formula it can be seen that horsepower continues to increase even after the torque has begun to roll off.
The key to performance is to look at torque via a dyno run. Ideally you want the highest, longest, flattest torque curve possible.
Jim
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