• 0 Posts
  • 304 Comments
Joined 1 year ago
cake
Cake day: July 5th, 2023

help-circle
  • Many cars have this with the touch screen, sport mode, eco mode, etc. Some will even learn from your driving behaviour and calibrate to that.

    The change is functionally instant, and when the original post talked about mapping it’s really a bunch of graphs and curves that dictate behaviour over the full range of rpm of the engine. You can switch maps on the fly by loading different basically spread sheets into the computer. Factory cars are calibrated for general use and epa standards, but you could make all kinds of special settings for various conditions.

    My knowledge of this is dated, haven’t been in the industry since 2000, but the basics haven’t changed.

    Older Porsches had a physical button on the floor under the gas pedal that you’d trigger when you floored it, putting it in spaz mode.

    The truth is, how you drive has a bigger impact on fuel efficiency than anything else, don’t accelerate aggressively, and stay below 65 mph. Wind drag above 50 mph is by far the greatest impact on fuel efficiency. Internal combustion engines are generally most efficient between 1800 and 2500 rpm, so if you keep your cruising speed there you’ll get the longest range on road trips, but obviously it’ll take that much longer.


  • It can’t do both at the same time.

    By remapping I assume you mean changing the ECU (engine control unit) programming.

    Depending on what all it controls, usually fuel injectors and ignition, and what it reads, air pressure, rpm, oxygen, throttle input, the mapping adjusts timing of ignition, and how much fuel is injected based on how fast the engine is spinning, and where the throttle is set.

    Most cars from the factory have a very simple mapping based around what most drivers do.

    A fancy prototype CRX I had back in the 90s had very custom mapping that meant when I drove mellow, it got about 45 mpg, but had very slow acceleration. If I pushed the throttle past a certian point, it spun up like a bat out of hell, but the fuel economy would plummet.

    What you can do with custom mapping is change the way the engine behaves under various conditions and based on the inputs. There is no magic get more out of the engine. Want more power? Eat more fuel and lose economy, and likely not burn off all the fuel so more dirty exhaust. Want more range? Limit power and lose acceleration.








  • How many other places in the world could she have taken this photo? All of them.

    As a start, 6 million Jews were exterminated in camps like this, as well as many, many others, including some of my relatives.

    I have my views, and they aren’t shared by everyone. I am obligated at times to go to a church, and as an atheist, I keep my mouth shut and let people observe their sacred places.

    This location is sacred, to many people for many reasons. Nothing about it suggests “Look at me aren’t I cute?”.

    The events that happened there represent some of the worst that man can do to thier fellow man. The defeat of that ideology and liberation of these camps represent the best that man has to offer.

    Men women and children died there on mass because of who they were. Men died on mass to free, protect, and avenge those people.

    When you are walking on someone’s grave, please show respect. When you are walking on a peoples grave, yes, take a photo, commemorate your experience, and have the humility and humanity to do it in a way that honors those who died.




  • If you don’t feel it, don’t do it. Some injuries don’t heal right, and many of the hobbies I enjoy have a pretty damned high risk factor. Almost every single time I’ve had a serious injury, that little voice was telling me “This one might not end well”, and I went for it anyway.

    I could have walked away, called it a day, and come back another time. It wasn’t a contest, I was just out filming a few tricks for my “You’re turning 40 and still doing it” video. Didn’t stretch, didn’t warm up, and my over enthusiastic filmer was all “Try this, do that”. Ended up collapsing my knee and fully tearing my MCL.

    Between that and a few neck and back fractures over the years, my mobility and flexibility are pretty well shot. There are things I just can’t do anymore.

    Sure I still skate, and am amazed just how much I can still get away with, but now every minute on the board includes a constant “Is this safe? Is this worth it?” chant.