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Old 08-19-2020, 11:23 AM   #12
mrg666
pessimistic skeptic
 
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Join Date: Apr 2016
Drives: '14 FR-S Monogram AT JRSC
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Quote:
Originally Posted by Irace86.2.0 View Post
If we use this chart, and the example I gave, then we see that in third gear at redline we would be traveling around 95mph. If we shifted into second gear by accident then we would still be close to 95mph, and the rpms would be around 10,500rpms.
Even worse, if the rev limiter cuts the throttle at the same time when the engine is forced to rev at 10500rpm, there can be engine damage until engine brake slows the car down and rpm decrease below red line. I would imagine that is a big impact load on valvetrain and connecting rods. I have done accidental downshifts before and the AT allowed those. Since the shifting mechanism is sequential, one has to do a triple tap for such a severe case. I think the AT will not do that downshift, but I have no intention to find out.
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