I have a 2017 Durango 5.7L to 6.4L swap with the 2.9L Whipple. The Whipple calibration and kit with the 63lb injectors is for my previous 5.7L engine on the PCM with 5.7L OS associated with my VIN. The new 6.4L is a stock displacement drop-in with forged internals and 9.7:1 CR. The camshaft is a Comp 270 XFI 222/230 (222deg intake duration/230deg exhaust duration). The cam has a ground-in advance of 4deg on the intake. Because of the cam and high lift, the springs were upgraded as required with VVT cam phaser limited to 7deg (14deg crank). The heads were ported by HHP-BES (390CFM flow bench). I also have a 90mm TB, Kooks headers, and 2,800 stall converter on the stock 8HP70 trans.
I modified a Comp Cams crank/cam timing chart with my cam card data and notes to help me better understand the timing. I do not know how to translate this data into the HPTuners airflow settings under the "Variable Camshaft" and "Neural Network" sections.
Idle at 2,000RPM is stable with 22" vacuum but not stable below that. The idle AFR is very rich with 0.5 to 0.8 Lambda and STFT = -33% to -15% when approaching 0.8 Lambda. This is with the 63lb Siemens injectors @[email protected]. It seems to be tune related airflow and timing associated with a cam upgrade. Any ideas?
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