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Offroading the 2024 Tacoma | Answering Important Questions - by The Car Care Nut
- Thread starter Wukong
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oxi
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Love the video.
I took this truck (2010 SR5)on Road America to get from pit exit to turn 3 when I was flagging before I ran full speed with my X-Runner back in the day!
I took this truck (2010 SR5)on Road America to get from pit exit to turn 3 when I was flagging before I ran full speed with my X-Runner back in the day!
theKurt
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He did address the lesser HP/torque on the manual. Although the engineer didnât say âcrankshaft hammeringâ like Sheldon did, he mentioned how they couldnât control the output on the manual like they could on the auto. He talked about clutch dumps and such and very briefly mentioned emissions.
Iâm no expert (maybe someone here is?) but I donât see how 7hp/torque changes anything with regards to âcontrolling outputâ. I very much believe itâs been detuned purely for emissions since it loses 2 gears from the 8A and they canât override the driverâs gear selection with software.
Iâm no expert (maybe someone here is?) but I donât see how 7hp/torque changes anything with regards to âcontrolling outputâ. I very much believe itâs been detuned purely for emissions since it loses 2 gears from the 8A and they canât override the driverâs gear selection with software.
av8r
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What he didn't mention is that an auto trans has parasitic losses, which is the much more likely explanation for the difference in power.
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theKurt
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that is true. But is the 278 crankshaft HP or at the wheels? Its usually published as crank HP/torque so the transmission losses wouldn't come into play just yet.
They probably could have just marketed as 270hp or 278hp all across the board in that case. Few people will dyno it and any discrepancies found from those who did could be explained away as tolerances in manufacturing. It just seems weird that they would state two different values that are really quite close together, but I guess they will try to publish the highest value possible to make sure they are as competitive as possible in the midsize category and then make sure they didn't get a class action suit from all the 6M drivers out there for missing ponies.
av8r
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They always provide the numbers as crankshaft horsepower. The point is that is very typical for auto manufacturers to detune the stick shift versions of vehicles when they also offer that vehicle in an automatic. The losses that are created by the automatic transmission are buffered by the additional horsepower at the engine so you can have comparable performance from a perceived point with either transmission. It's all about consumer perception. It's marketing.
theKurt
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ah....gotcha. So the resulting wheel horsepower ends up being about the same in both cases. 
av8r
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Probably very closeah....gotcha. So the resulting wheel horsepower ends up being about the same in both cases.
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