[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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