Originally Posted by
Bluecat @ forum.hptuners.com
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Main thing to remember is that if at a certain air flow the PCM is over correcting with the IAT (Gets richer when its cold, leaner when its warm), make the bias bigger. If the PCM is under correcting (Gets lean when its cold, and rich when its warm), make the bias number smaller. Don’t think of it as cold/warm or rich/lean because your always going to have to redial in the VE. Remember that since the ECT is pretty stable and constant on a warmed up engine, biasing towards ECT (1.00) will make the IAT less aggressive (Less IAT correction) and making the number smaller will increase the IAT’s authority and make IAT correction stronger.
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