EFIDynoTuning Forum

Looking to add some timing to my tune to see if I can increase performance. I see the A9L2 uses only one spark table. What other parameters will I need to adjust if I bumper up the timing a couple of degrees? Decipha pretty much dialed in the tune, I just want to play around with the timing to hopefully increase performance. Any help/guidance is appreciated.

Thanks!

you simply just plug in the spark you want at the rpm and load you want it at no biggie

No need to add fuel anywhere?

fuel has nothing to do with spark

but if you want to change the afr you simply go to the fn1360 fuel table and plug in the afr you want at the perload and rpm you want it at no prob

Perfect. That answer could not be any more clearer. Thank you.

If you want to advance your timing by say 2*, is the Open Throttle Spark Modifier - KPS1 the appropriate place? I added 2* a few months ago and it does appear to advance it as I expected it to. Saw this post so figured I'd just ask and it might be relevant to the author.

No, always best to add spark in the spark table and not globally

I def understand being more specific for ranges vs. global. At the very least I read the Parameter Comments on that one which is why I got the idea it's equiv to advancing the timing w/ the distributor for non-EFI. I know our EFI requires 10* and nothing else since the EFI takes care of the rest. As always good info and Thank You Decipha :)

From Parameter Comments:

KPS1 - Global Spark Modifier

It is recommend to set this scalar to -3.0 to remove -3 degrees of timing when testing on the dyno or at the track. If the engine increase power or MPH decrease this scalar again to -6.0 to remove more spark. Keep removing timing until the engine slows down then Add back in -2 degrees.

If the engine lost power when -3.0 was removed, add in +2.0 degrees and see if the engine responds. It is not recommended to add anymore than +6.0 degrees of timing on naturally aspirated engines or any more than +4.0 degrees on boosted engines. Adding timing on boosted engines can lead to engine damage.