Originally Posted by smslyguy
We're not following...
We're not following...
Small..
I would be interested to see your original BRK log. Got it that it was probably a typo on your last post.
What I do not understand is that in your first post you stated that 'zeroing' out that Table made no difference. Now it does? It is confusing that your would have BRK constantly?
For all those following the thread. What Joecar and others have stated make sense. I reviewed some of my WOT logs. It takes me less than 1/2 second to go from .24 g/cyl to .72 g/cyl. BRK would have probably done the same thing as manually ramping down the spark amount. One reason I eliminated it to keep my spark additions & subtractions to a minimum. It is part of my tuning philosophy on keeping it simple. But, I agree it many cases it may be best to 'leave it alone'. It does have a purpose. In my case I can only tolerate 22-25 of spark at WOT, so ramping down served my tuning purpose(s).
Small, I would be curious on that log. It might help others who do not quite understand BRK..
here is a copy of my scan. As you can see on the scan data it is almost peged at 8.1 burst knock. After looking at that scan's spark tables and the actual spark tables it does appear to be pulling about 8.1 degrees of spark. Have a look let me know what you think? Thanks.
Last edited by smslyguy; June 21st, 2010 at 01:05 AM.
2001 camaro z28 ss vert with factory slp upgrades, Hooker long tubes, 3"y-pipe to a 4" muffler, ,airlid,s.s.r.a. ,t.c.bypass,descreened m.a.f. 232/234 .595,.598 +2 comp cam with ported and polished stock heads with .650 lift dual springs and a bowl grind. tuned with EFI Live. All combined to achieve 29 m.p.g. and 399 r.w.h.p. with 384 lbs of torque. sold...
Now own a 2015 1LE camaro
Chris:
O.K., I see it is getting the KRB values from Table B6212. What values did you have in Table B6210 when you did this log?
To get it to read zero (0) KRB, the easy answer seems to manipulating B6212 to read all zero's. Are you saying you changed Table B6210 to all zero's and it worked?
yes i did change b6212 after reading your reply's on here and that fixed it. It was indeed still pulling timming before, but not anymore. My timming has advanced now almost 8.1 from before would this be enough to throw off my v.e tables and my m.a.f tables as well? I did re-run the open loop to see if my v.e. tables needed any adjusting and they were spot on. If anything a little rich. same as my m.a.f table.
And no b6210 did not work. It just wasn't registering as k.r. but was still infact pulling timming though. b6212 fixed that. Thanks for the reply's.
2001 camaro z28 ss vert with factory slp upgrades, Hooker long tubes, 3"y-pipe to a 4" muffler, ,airlid,s.s.r.a. ,t.c.bypass,descreened m.a.f. 232/234 .595,.598 +2 comp cam with ported and polished stock heads with .650 lift dual springs and a bowl grind. tuned with EFI Live. All combined to achieve 29 m.p.g. and 399 r.w.h.p. with 384 lbs of torque. sold...
Now own a 2015 1LE camaro
O.K., I think I got it. Glad to hear you fixed the burst knock dilemma. Obviously, keep monitoring for any KR. Without the preventative action of KRB, you now have to be extra vigilant for KR.
Your VE and/or MAF Tables should not be thrown off to a great degree. The effect of reduced spark may cause a slight difference in AFR's, but running closed-loop you should be able to tell a difference in your LTFTBEN's. If you see the LTFT's really swing, then I would contemplate an airflow re-do. Personally, I would not worry about it too much as it applies to your tune.
The main thing is you do not have to drive around with a constant 8 degrees of timing being pulled. That had to be annoying.
Good luck..
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