Jump to content
SAU Community

Recommended Posts

If you have 700cc injectors operating at 80% duty cycle, does that mean you empty your entire typical skyline petrol tank in about 14 minutes?

So if you drove at maximum speed, say, 200 mph, for 14 minutes, you'd cover about 50 miles.

Your petrol consumption for this hypothetical run would therefore be about 4 mpg ?

So those guys who used to drive the wangan run in 1000hp cars only had to concentrate for, at most, 10 minutes at a time?

Since the Veyron has 16 cylinders, and empties its 100L tank in 12 minutes @ 250 mph, each of its cylinders needs only the direct injection equivalent of a ~400cc injector, however its mpg would be about 2.

These things I was thinking on a bus ride today.

Edited by moneypit
:)

I had that on a number plate for a while (not in australia). "GEEK". But I think I barely qualify.

People @ a red light would ask if I worked for "geek squad" (kind of a dotcom mobile PC repair outfit) and ask if I'm available to fix their broken PC. Sigh.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Bit of a pity we don't have good images of the back/front of the PCB ~ that said, I found a YT vid of a teardown to replace dicky clock switches, and got enough of a glimpse to realize this PCB is the front-end to a connected to what I'll call PCBA, and as such this is all digital on this PCB..ergo, battery voltage probably doesn't make an appearance here ; that is, I'd expect them to do something on PCBA wrt power conditioning for the adjustment/display/switch PCB.... ....given what's transpired..ie; some permutation of 12vdc on a 5vdc with or without correct polarity...would explain why the zener said "no" and exploded. The transistor Q5 (M33) is likely to be a digital switching transistor...that is, package has builtin bias resistors to ensure it saturates as soon as base threshold voltage is reached (minimal rise/fall time)....and wrt the question 'what else could've fried?' ....well, I know there's an MCU on this board (display, I/O at a guess), and you hope they isolated it from this scenario...I got my crayons out, it looks a bit like this...   ...not a lot to see, or rather, everything you'd like to see disappears down a via to the other side...base drive for the transistor comes from somewhere else, what this transistor is switching is somewhere else...but the zener circuit is exclusive to all this ~ it's providing a set voltage (current limited by the 1K3 resistor R19)...and disappears somewhere else down the via I marked V out ; if the errant voltage 'jumped' the diode in the millisecond before it exploded, whatever that V out via feeds may have seen a spike... ....I'll just imagine that Q5 was switched off at the time, thus no damage should've been done....but whatever that zener feeds has to be checked... HTH
    • I think Fitmit had some, have a look on there (theyre Australian as well)
    • Hah, fair enough! But if you learn with this one you can drive any other OEM manual. No modern luxury features like auto rev-matching or hillstart assist to give you a false sense of confidence. And a heavy car with not that much torque so it stalls easily. 
    • Actually, I'd say all three are the automatic option. Just the different trim levels. The manual would be RSFS, no? 
×
×
  • Create New...