Spark plugs

[Bob Tom]

At 01:08 PM 12/7/01 -0500, you wrote:
>--SNIP--  The center electrode can hold just enough heat
>that in some transistional stuff (tip-in detonation / ping), and
>some conditions of WOT trigger a slight amount of detonation.

I would be interested in reading about these WOT conditions
as I have, once in a blue moon, had a couple of slight detonations
on a run just as I'm approaching the finish line (using Autolite 3923,
one range colder than normal, and gapped to .035 from the normal
.040 on a stock ignition).  I was thinking that I might be maxing
out the injector's duty cycle.

>Lots of reasons, but usually from running too small of injector,
>and running out of AE.  Often folks just look at injector
>sizing as a function of BSFC, and totally miss the AE stuff.
>Or get cought up in the lean as possible mode, and then any
>variance in fuel fubar's things.   Bruce

AE = ?  Sorry, got lost here.

Thanks for your post(s) on this thread ... very informative.

Bob Tom     Burlington, Ont., Canada
'97 Dakota Sport, 4x2, CC, Flame red, 5.2L, auto., 3.92SG

----------------------------------------------------------------------------
To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org