Piston Slap: Hat Trick!

Jesse writes:

Hello, Sajeev.

My 2013 Outback 2.5i is fine and I don’t have any questions about it. Instead I wonder:

1. Why do car reviews measure acceleration in time but deceleration in distance?

2. Why do high performance electric cars need conventional brakes? I think there was a Mini concept a few years back that had 4 in-wheel electric motors that did all of the accel/decel.

3. Why don’t cars with CVTs have a ‘downshift’ button? Is it too hard on the transmission? Should I stop using the paddles to do so?

Thanks!

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Piston Slap: Blogging About Engine Bogging

Pat writes:

Hi Sajeev,

I have a question about driving style that I’d like to pose to you and the B&B. Part of my highway commute is a steady 2 mile grade. With a running start of 75 mph, my 2007 Mazda B2300 slows to about 62 mph by the top of the hill when I keep it in 5th gear, with the engine turning about 2000 rpm. I can maintain 70+ if I drop into 4th and floor it, but I’m a cheapskate at heart. My question is, is it really more efficient to lug up the hill in top gear, or am I just kidding myself and doing irreparable damage to my engine?

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Piston Slap: The Auto-Erratic Transmission?

Longtime TTAC commentator Mikey writes:

Sajeev,

I bought a 2014 Impala LT with a 2.5 four cylinder, and a 6 speed auto. I’m a 60 year old guy, that’s driven more cars than I can count. I’m still in awe that the engineers have figured out a way to move a car with the weight and size of the Impala with a 155 cu. in. engine. I love the car, with its comfort, and size, it suits my needs perfectly. I’m getting great gas mileage, with mostly city driving. Were flirting with 5 dollars a gallon up here. I’m willing to sacrifice power for economy.

I’m rarely on the highway these days. However I do find that at highway speeds{ 75 mph or so} the slightest touch of the gas pedal, will cause a down shift. The tach will jump from 2200 up to the high 3000’s in an instant. Does the 6 speed down shift sequentially, 6 to 5? Or will it go back 6 to 4th?

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  • Ajla Those letters look like they are from AutoZone.
  • Analoggrotto Kia EV9 was voted the best vehicle in the world and this is the best TOYOTA can do? Nice try, next.
  • 3-On-The-Tree 4cyl as well.
  • Luke42 I want more information about Ford’s Project T3.The Silverado EV needs some competition beyond just the Rivian truck. The Cybertruck has missed the mark.The Cybertruck is special in that it’s the first time Tesla has introduced an uncompetitive EV. I hope the company learns from their mistakes. While Tesla is learning what they did wrong, I’ll be shopping to replace my GMC Sierra Hybrid with a Chevy, a Ford, or a Rivian — all while happily driving my Model Y.
  • 3-On-The-Tree I wished they wouldn’t go to the twin turbo V6. That’s why I bought a 2021 Tundra V8.