RE: EST

[Mike Rolica <mrolica@meridian-mag.com>]

Yea I had that problem too.  Also under ¾ throttle to full it would knock
between shifts   especialy 2nd to 3rd.  Knocked when it it 3rd for a sec
Mike Rolica
Meridian Magnesium Products
Strathroy, Ont 
Ext. 260


	-----Original Message-----
	From:	Mark Romans [SMTP:romans@pacbell.net]
	Sent:	Sunday, January 09, 2000 7:57 PM
	To:	gmecm@efi332.eng.ohio-state.edu
	Subject:	Re: EST

	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
	>| >|
	>| >
	>| >
	>|
	>