Posted by Steve@Advance on February 15, 2019 at 18:50:51 from (66.169.147.211):
In Reply to: 11 HP difference - Why? posted by valiant farmer on February 15, 2019 at 16:42:08:
That's a very common practice.
The mfg builds an engine, a very costly endeavor. Then intentionally derates it with low compression, small carb, small cam, restricted manifolds, and juggle the numbers a little.
This does a couple of things, it gets the newly designed engine off to a good start because it runs smooth, and runs a long, long time with few problems.
Then as the next models start coming out, the engineers begin to open it up just a little, improve the performance without having to develop a complete new engine.
Eventually they start increasing the displacement, pushing the limits until things start failing, or technology, emissions laws, and competition bring about the need for a new design.
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