Does Blackwing CAI make AFR Richa at WOT?
08-19-2012, 10:46 AM
#1
Does Blackwing CAI make AFR Richa at WOT?
I understand that a CAI will likely make the engine run rich at WOT (because it will create positive LTFT that will add to WOT). What conditions make the PCM determine that it is in WOT? If it is WOT, does it go to the PE tables?
I am struggling to understand why anyone would put a CAI on their car if it makes the engine run pig rich at WOT (unless of course you also want to add on the cost of the tune).
I am struggling to understand why anyone would put a CAI on their car if it makes the engine run pig rich at WOT (unless of course you also want to add on the cost of the tune).
08-19-2012, 11:04 AM
#2
Racer
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In a nutshell the PCM will re-calibrate for the added air. With most cold air systems a 10-12 RWHP increase....especially initially, as the stock PCM runs a little rich and the extra metered air should lean the A/F out SLIGHTLY after install. Many believe that affect is short lived as the PCM "learns" from the increased airflow and changes the A/F back to the factory setting. At that point the cooler, denser air is what is increasing power, not the A/F ratio. The only way to maintain an improvement in the stock (read rich) factory AF ratio is through tuning. A tune will maximize your gains, though if a CAI is going to be your only MOD, probably not worth it...
08-19-2012, 08:24 PM
#3
In a nutshell the PCM will re-calibrate for the added air. With most cold air systems a 10-12 RWHP increase....especially initially, as the stock PCM runs a little rich and the extra metered air should lean the A/F out SLIGHTLY after install. Many believe that affect is short lived as the PCM "learns" from the increased airflow and changes the A/F back to the factory setting. At that point the cooler, denser air is what is increasing power, not the A/F ratio. The only way to maintain an improvement in the stock (read rich) factory AF ratio is through tuning. A tune will maximize your gains, though if a CAI is going to be your only MOD, probably not worth it...