I will be tuning a large cammed 346 later today. If anybody has unique tips and tricks for Auto's that would help a lot. Hopefully we can condense it all into 'one-stop' Idle Tuning resource. Very few of us totally understand the workings of the IAC in combination with some of the features of closed-loop tuning.Īt some point I will try to synthesize all the information in the next few weeks. We welcome your expertise along with many others. I probably won't have much (if anything) to add to this thread.
I use the Idle tutorial you metioned in the first post, but more "how to" info is always welcome.Īcheiving an idle that is reasonable (given components used), and acceptable to the customer is often a challenge for me. I've been in the industry for several decades, but consider myself "new" to the EFILive software as I haven't been using it (or tuning EFI engines) for very long. LS1 CAM/IDLE BASE Tune & IDLE P DF (See Below) ** Note: Tables are for Illustrative Purposes only.
Your High Octane Spark and Base Spark in gear should be within 4 degrees of each other. If your car wants to stall when you shift into gear (High-Octane Spark), then your Spark is probably dropping to low. If the car wants to stall you automatically get a bump in Spark to help prevent Spark for going to low. B5932-Base Spark in Gear: Add +4 degrees to Spark Values in the 400 RPM Idle Region, and +8 to to the 0 RPM Idle Region on Base Spark. Great way to get additional Air when you press the throttle.Ĩ. B4315-B4320 Throttle Follower: Identical values as Idle Tutorial. I use a 98 Camaro LS1 Automatic TC Table with about 33% less air (-33%).ħ. A good TC Table will gradually decrease throughout the RPM and MPH range, with no 'holes' or added air. A great 'Stall Saver' is to add +4 g/s to the 400 Rpm Values. B4309-Throttle Cracker Airflow in Gear (TC): Utilize the least amount of air to prevent Rpm's hanging (cruise control), but enough to prevent excessive engine braking and lack of throttle response. B4512, B4514, B4515- Learning Parameters: Per I dle Tutorial.Ħ. B4504- Airflow learning Control Delay: Change per Idle Tutorial from 1.3 to 4.3 seconds.ĥ. Eliminates additional Airflow Source while tuning Idle.Ĥ. B4352-Cat Light-off Idle Offset Multiplier: Make Multiplier zero (0). The goal is to have your MAF, VE, and Desired Airflow all utilizing identical Airflow Values. B4307-Desired Airflow: Log SAE.MAF (g/s) vs ECT at Idle. For 400 Rpm's extrapolate the 800 Rpm Values minus 10%.Ģ. B0101- Main VE Table: Perform Calc.VET or AutoVE for the Idle Rpm's 800- 1200. IAC Effective Area (unless different TB size).ģ. Make the least amount of changes to maximize Idle!ġ.
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