Originally Posted by
blown392
Hi all,
I am looking for a little advice with regards to a knock retard issue that I am having on a 2012 Whipple supercharged 392 challenger. I have an issue wherein I periodically see minor knock retard of .5 to 1 degree of timing pulled in the area of ~2000 rpm and ~.20 g of aircharge. I have seen this on a number of my logs and have been pulling timing in repeated iterations of my tune in the base spark table to compensate for it. I have now pulled up to 4 degrees of timing in this area of the table and am still seeing the minor knock (again never above 1 degree). I am wondering if this is false knock, but I am hesitant to ignore or tune it out if there is really something happening there. The knock sensors have already been somewhat desensitized from the tune I got from Whipple with my kit (adding up to .3V to the threshold). Cylinder 1 has a knock threshold of 1.198V at 1,800 RPM and 1.597 V at 2500 RPM. Has anybody seen this before? A picture of one of my logs along with my base spark table is attached.
I am concerned as this area is the area that my car spends a lot of time in as I am on the highway at ~60 MPH in 6th gear. Any thoughts would be appreciated.
THANKS!
Blown 392