What kind of air/fuel ratios are maintained with the Hahn kit using the afpr and the FMU?

The stock timing tables remain in place?

Is there any knock retard?

Depends on how the FMU is adjusted, just about anything you want on the stock 7-8psi wastegate actuator. I had no knock retard at 7-8psi (20g), I did run into some when I bumped low octane values closer to that of the high octane.


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Mitsu TD06-20g |3" Downpipe w/ Cutout | 61mm Bored TB |
HP Tuners | Innovate WB02 | Spec Stage 3 | TurboTech Upper | Full Addco Sways | Sportlines & Yellows |

As for AFR and knock thats kinda something you set yourself, ideal AFR is about 11:8 you could go a tad leaner but its better to be safe than very sorry, too too lean you will see knock



1989 Turbo Trans Am #82, 2007 Cobalt SS G85