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Other than normal wear and tear, are there any detrimental effects or added harm done to the engine by going full throttle in 1st and/or 2nd gear, then shifting up well before redline (say 4k rpm on a 7k rpm engine)?

Would it, for example, cause more PCV valve activity, increase carbon deposits, or gum up the inside of the throttle body? Does fuel injection, electronic throttles, or forced induction compound or alleviate any issues?

Would it be better (but slower :c) to not accelerate at wide open throttle, or to taper off slowly instead of instantly releasing the loud pedal?

I don't think this falls under 'driving habit' questions as I'm asking what mechanical maladies the habit may cause.

MooseLucifer
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1 Answers1

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Seeing as it's my question, I've kept it in the back of my mind for a while. Without any hard evidence to back it up, I've come to a general conclusion that makes sense to me.

Immediately releasing the gas and putting the clutch in, such that the engine would go from WOT under load to idle without load, could cause unburnt oil, which was vented into the intake chamber via the PCV valve under full throttle, to swirl around and find a nice resting place for itself in the intake plenum/manifold/throttle body. If done frequently, I suppose this could lead to a loss of power when going WOT again, as the extra oil deposits are drawing into the combustion chamber.

Slowly releasing the throttle would limit the PCV activity towards the end of the go-fast session, allowing more time for the oil to enter the chamber and burn up.

Again, total guess, no data to back it up. Just thinkin' out loud!

MooseLucifer
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