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

[Adam Wade]

--- Dave Dahlgren <ddahlgren at snet.net> wrote:

> Over the last 20 years I have not found this to be
> true at all.

...

> The NTK wide band will read richer with the same
> amount of fuel and if timing is advanced to optimal
> it indicates leaner to the point I am tempted to add
> more fuel.

Which is why I don't use an O2 sensor of any sort for
tuning on a dyno.  While it is a fine toold for what
it is, it cannot give nearly the depth of data that a
four-gas analyzer can.  It won't indicate rich or lean
if the timing is not optimal.  In fact, with training
in what to look for, it is possible to see when a
single cylinder is rich or lean from the rest
(although you cannot tell which one unless you have
probe ports in each runner of the exhaust manifold.

=====
| 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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