Re: EST

[Mark Romans <romans@pacbell.net>]

Hey Bruce, this burst knock thing doesn't apply to a 165 ecm running 89 code
does it?  When I blip the throttle for a downshift, diacom picks up a pretty
good burst of detonation.  I can't tell driving the car since I'm in decell.
Mark
-----Original Message-----
From: Bruce Plecan <nacelp@bright.net>
To: gmecm@efi332.eng.ohio-state.edu <gmecm@efi332.eng.ohio-state.edu>
Date: Sunday, January 09, 2000 2:23 PM
Subject: Re: EST


>
>With a sudden application of the trottle you can at times beat the
>accleration enrichments, and possibly some of the timing changes.  I think
>it's primarily the fuel.  Anyway, to compensate for this, since it might be
>too short for the normal knock strategy to catch, there is a "burst knock"
>table.  It varies some from code to code.   It has a time, and degrees max,
>generally.   So it can be very critical to drivilbilty in high performance
>applications.  I've never bothered to develope a timer for it, but on some
>applications, from a drivibility standpoint it seems to matter.  It's at
the
>I've run out of other things to do list, but can be very worthwhile
>(seems like the lighter the car the more so), but I've had several cars
just
>trace knock when ya try turning it down, and some no difference.
>Grumpy
>
>| What effect does adjusting "burst Knock" parameters have on overall perf
?
>I
>| don't do much
>| turbo stuff--so I'm in learning mode.
>|
>| Lyndon.
>| -----Original Message-----
>| From: Bruce Plecan <nacelp@bright.net>
>| To: gmecm@efi332.eng.ohio-state.edu <gmecm@efi332.eng.ohio-state.edu>
>| Date: January 5, 2000 3:52 PM
>| Subject: Re: EST
>|
>|
>| >
>| >OK, try tinkering with the burst knock
>| >Grumpy
>| >
>| >| Hi, Brian -
>| >|
>| >| At the suggestion of someone on the GMECM list, I've been trying
>| different
>| >| amounts of EST recovery with *great* results.  Of course, if you
>*never*
>| >| get any knock retard, won't do a whole lot of good.....);}E  Managed
to
>| >cut
>| >| 0-60 time by 0.4 seconds (5.3 to 4.9); for me, that's a great deal.
>| >|
>| >| I've just been increasing the values in the F7 table @ 0x0322; seems
to
>| be
>| >| no upper limit so far that adversely affects performance.  Up to
205.08
>| >w/o
>| >| any probs so far.
>| >|
>| >| You've no doubt done some work in this table area; anything else I
>should
>| >| know?  How about some of the other EST values; worth twiddling with?
>| >| Attack is probably fine where it is (?).
>| >|
>| >| Just got another 6" of snow last night, so testing is probably
>suspended
>| >| for awhile; at least 'chipping' is indoor work mostly......
>| >|
>| >| Keep in touch - Barry - Sy#26
>| >|
>| >
>| >
>|
>