Just wondering why these timing tables stop so soon and how do you tune timing close to redline?
Engine redline is 7000 +- 200 rpm depending on bin file. Main timing stops at 4800rpm and power enrich timing table stops at 6400rpm. VE table goes to 7200rpm. Wheres the rest of timing?? Does it follow the trend of last couple cells or something??
Attachment 10967
Attachment 10968
Last edited by BigBanks78; 09-18-2016 at 05:55 PM.
The ECM uses the highest cell for the RPM in the load column that is appropriate.
In factory form and typical consumer use, most engines never see the high side of 4500 RPM, if that, so the tables were built according to the largest percentage.
The man who says something is impossible, is usually interrupted by the man doing it.
Well dang that sucks! I kinda thought the main table stopped at 4800 because it might switch to pe timing. If I knew the code this bin is written in would I be able to add the extra rows and column's? Maybe add a 3 bar map sensor pid? Or is the ECM going to limit what can be added to bin file and work?
i have a 165 ECM from 305 tpi now but hard for me to give up on something I've worked so hard on.
Last edited by BigBanks78; 09-19-2016 at 06:19 PM.
Quick answer is it's just not needed. Most engines, once you get past about 4000RPM, just don't need to change the timing anymore. A few engines like to have the timing advance continue as RPM's rise, but it's normally three or four more degrees for three or four more horsepower as the RPMs climb.
Just not worth the extra effort for 95% of applications out there.
Ok I shouldn't have timing going back down like an upside down J? So from 4000 keep timing flat or advancing a little?
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