Base Ignition Table for 89 Ford 460

Hi, I would like to set up a base timing table for my 1989 Ford 460 EFI (7.5L) running a self made PNP Speeduino ECU (using tunerstudio).

I checked the example ignition map from the practical standalone tuning course but it seems from what I've read online that older engines like mine actually run more advance than the table suggests. While I don't have the factory ecu ignition table I know from checking with a timing light that it overs in the low 20's BTDC when idling.

Does the attached snapshot of the table I've set look reasonable as a safe start?

I basically did four values at the edges of the usable range of the table and interpolated in between.

Thanks !

That looks fine to me (I have a 1990 Ford 460 in my F350!). Are you going to tune the engine on a dyno? You will be able to easily find the ideal values that way.

Thanks for your input.

I probably will at some point go to a dyno, but for now this is for me a for fun project of learning engine tuning, PCB design and coding as well.

My goal is to be able to have a true plug and play standalone ECU with equal or better drivability than stock.

There was a few challenges along the way like the fixed duty variable frequency map sensor, the PIP decoding with the Fixed duty SPOUT that were not available as part of the Speeduino project. Nice thing with open source is you can contribute for your own need and make it available for all.

This was one of the last ignition tables I did on my 72' 460 (D3VE heads) before the built motor went in. It was 10 years ago so hard to remember exactly but I think all that was done on it was advancing the cam by one tooth or something like that. Holley 750 and aluminum intake too.