[Diy_efi] RE: Diy_efi digest, Vol 1 #413 - 12 msgs

Adam Wade espresso_doppio at yahoo.com
Fri Dec 20 00:48:51 GMT 2002


--- William Shurvinton <shurvinton at orange.net> wrote:

>> I can't grasp why terminal velocity tune loses
>> power in lower gears

> I'm being very dopey or there is a contradiction
> here with your original answer. Probably the former.

Oh, I forgot to mention, that on an inertial dyno,
say, in higher gears, you are trying to accelerate the
mass through a longer lever arm, and so it requires
more torque.  This has a very similar effect to that
of DRIVING the car in a higher gear, albeit to a
lesser degree.  It takes more instantaneous torque to
accelerate the drum a set amount, and so the engine
accelerates more slowly, making it a bit easier to
tune.

Obviously the easiest way to tune is to keep the
engine steady-state, absorbing all the power it can
produce without allowing acceleration.

=====
| Adam Wade                       1990 Kwak Zephyr 550 (Daphne) |
|   http://y42.photos.yahoo.com/bc/espresso_doppio/lst?.dir=/   |
| "It was like an emergency ward after a great catastrophe; it  |
|   didn't matter what race or class the victims belonged to.   |
|  They were all given the same miracle drug, which was coffee. |
|   The catastrophe in this case, of course, was that the sun   |
|     had come up again."                    -Kurt Vonnegut     |

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