Quote:
Originally Posted by strat61caster
Do you notice this surge while maintaining consistent rpms? The engine pulls stronger higher up the revs. What your describing is how all engines work, at least to my ears.
The other thing is that engines run rich when cold, this generates excess heat to get the catalytic converters up to temperature to reduce emissions, called "light off temperature". This is similar to what was called a "choke" in the old days, after the car warms up you can dial back to the proper air-fuel ratio and it'll run better. Add in what others said bout oil circulating and this should satisfy most curiosities.
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It has happened at a constant RPM. I've accelerated slowly and held a near consistent RPM around 2800 and I've had it feel just like a switch was flipped on and the car instantly delivers more power, but only the first time I accelerate after starting the engine.