95 lt1 OBD1 car. Tuning with Tuner Cat.

My current A/F in the 3000-6000 rpm range is ~12.7. With a supercharged application I would like to get it down to ~12.0-11.7.

Reading some other posts on the subject I think I should modify the
% change to fuel/air ratio vs rpm at WOT
and the
Open Loop AFR vs Coolant Temp vs MAP.

Are these the right tables to mess with? Any others I should look at?

Thanks for the help.

 

Here is a good answer I got on another forum - for reference.

The % change A/F vs. RPM @ WOT is the table you need to adjust. Leave the open loop AFR table as is.

The % Change table is easy to use in the fact that it acts like an adder/subtractor table. So, if your A/F is 12.7 and you want 12.0, then take

12.7(measured)/12.0(desired) = 1.058

This means you'll need to add approx. 6% in that RPM range. Or, add "6" to the cells in that range. I would leave the % Change vs. Coolant Temp. alone as well, as this will act as a "global WOT" change, meaning all RPM ranges @ WOT. Unless that's what you need.

Another way it can be done is by entering the desired "calculated" A/F ratio in the % Change table and then adjust your MAF tables to bring your measured AF ratio in line with your desired or calculated A/F. For example:

If your % Change vs. Coolant Temp is 15% and your % Change vs. RPM is 8%, then your desired A/F ratio will be 14.7 / 1.23 = 11.95:1 (The formula for this is in the help file). Then, you would have to adjust your MAF tables in the frequency ranges needed to bring the measured A/F ratio inline with your desired.

This can be a little time consuming on the LT1's and if your not real comfortable with making changes in multiple tables like that then I would stick with the first suggestion. If adding or subtracting the percent values don't affect the A/F ratio, then you may have a fuel delivery problem.