can motor be driven on current tune safely , AF stays lower than 13 majority of the time.. however the block was replaced. new rings, new rod and main bearings, head was given a makeover on the valve guides ... other than that , its the same exact build... lmk

 

What were the AFs before?

 

One of the most important things is distributor timing.
It needs to be exactly where it previously was.

Recommended Target Air Fuel Ratios On 91-93 Octane Vehicles:
All motor vehicles: 12.9-13.4:1 (Full Throttle)
Forced Induction Vehicles: 11.2-12.0:1 (Full Throttle)
Partial Throttle/Idle: 15.5:1 (Light Throttle) 14.7-13.6:1 (Partial to Mid Throttle)
There are many small variables involved in targeting your air/fuel ratios, the main idea is to ensure you are not running too rich or lean & making the safest & best power possible due to maintaining a proper amount of fuel to your motor at all times.

 

Keep in mind that the motor is sealing MUCH better than it was before, therefore breathing a lot better. Try scaling down the entire map a little and see if things even out.

 

ty