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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
| >|
| >
| >
|