Any help with spark advance and retard in mptune greatly appreciated
Hi guys ive got my fuel figured out and was wondering if anyone could tell me or show me how to up the spark advance/retard i have an 89 t1 smec, burn2, ostrich 2.0, apu1 autoprom ftdi to sci cable, aem wideband, aem egt, both with 0-5vanalog outs for logging
Re: Any help with spark advance and retard in mptune greatly appreciated
How are you listening for knocks?
What fuel are you using? 91, 93, E54? E85?
Re: Any help with spark advance and retard in mptune greatly appreciated
93 until spring then e85 , i have a stand alone knock sensor with a headphone amp and phones
Re: Any help with spark advance and retard in mptune greatly appreciated
Re: Any help with spark advance and retard in mptune greatly appreciated
Thank you so much exactly what i was looking for.
Re: Any help with spark advance and retard in mptune greatly appreciated
just to add a little explanation.....
advancefromrpm2 tune a specific rpm range if it starts knocking at a certain rpm consistently when the boost hasnt changed. this typically happens at the torque peak.
advancefrommapwarmpart. i generally leave this alone until around 5psi. then after 5psi, i make it match advancefrommapwarmfull.
advancefrommapwarmfull. full throttle table based on map vacuum/pressure. if you are slowly turning up your boost and it starts to knock once you get to a certain higher boost level, then reduce timing at that boost level till the knock disappears.
it helps to have a scanner/mpscan/mpscandroid-mpscilink as well as an audio based knock listening device so that you know what cyl is knocking (scanner/mpscan stuff) and if the knock is real (audio listening device)
Brian
Re: Any help with spark advance and retard in mptune greatly appreciated
right on im looking for a reasonable 4000e i have an sci cable and mpscan. i also have a standalone knock listening device