M20B25 stock Ignition map and stock fueling map

[Nikhar]

Hi, I'm in the process of converting my stock engine from Motronic 1.3 to a standalone ECU. I would like to view the ignition and fuel maps for a genuinely stock M20B25 as most maps I can find are either for Boosted or highly modified engines. the only catch is I have 440cc injectors... Please help me :)

[hasa]

RPM Deg. Adv
6200 24
5840 29
5600 29
5480 24
5240 15
5040 15
4800 22
4520 22
4360 18
4200 18
3800 30
3000 30
2400 21
1800 17
1200 8
800 1

[Nikhar]

RPM Deg. Adv
6200 24
5840 29
5600 29
5480 24
5240 15
5040 15
4800 22
4520 22
4360 18
4200 18
3800 30
3000 30
2400 21
1800 17
1200 8
800 1

Thanks, looks like this was pulled from the stock chip, or maybe I'm wrong...

Either way, does this graph look reasonably correct with those values?

I forgot to mention I am using a Spitronics Orion2 Advance ECU

[hasa]

That was a WOT map someone had ripped from M20B25 ecu. It is very interesting detail that factory used this low advance in 4000-5000. One would claim it is "knock limited".

[e30davie]

Maximum torque is quoted at 4000rpm. So I believe you'd expect a dip in timing there.

[Nikhar]

Ah thanks that makes sense to me now

[digger]

A reduction of 12 degrees from 3800 to 4200 is not normal. I’m sure FF will chime in whether the same exists behaviour when tuning for MBT on stock engine . Ages ago the aftermarket chips made good gains in the midrange my guess is they added more timing in that area with assumption of higher octane

On my modified engine the timing looks nothing like that