If I remember correctly the engine is demanding more airflow than I have added, see log file. Idle ADAPTIVE Spark control :Adjusted to put smalles value at 50 rpm Idle Spark Advance: set to 28 deg in idle range(1200 and below) for both Park and Drive. Thank you guyīase Running Airflow: Multiplied from 68/deg up 1.50 (50%) Interpolated from 25Deg up My goal is horse power or course but I also want to see if I can get a tune that still keeps a decent MPG. If anyone can help me out I'd greatly appreciate it. below are my notes on what I've done and Ive attached my tune file. I have made few adjustments to get it running but it runs rough and has no power. Rebuild 4l60e /w corvette servos and shift kitįor some reason I just cant get this tune right. Summit Racing heads (flow a little better but nothing major) The junk yard engine decided it needed rebuilt so that's what I did.įlat top pistons (7cc relief for the valves.) I got that all installed, slapped a stock Express Van tune on it and everything was great for about 30k. I put a 5.7 vortec in my 99 GMC Jimmy and did the 0411 swap as well. I'm pretty new to tuning and I am doing my best over here not to blow up my engine, lol.
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