Ignition Timing - T56 to 4L80e
Ignition Timing - T56 to 4L80e Hello all,
I recently converted my turbo LQ4 from a t56 to a 4l80e. The tune was solid with the T56. I could beat on it all day long and never see any KR. 91oct/X2 M10 meth inj.
After the 4l80 install I'm picking up random KR. I made a few changes to the exhaust too, though I don't think it's hitting anywhere. I'm using a stock converter and the KR is sometimes when not in boost, 80-140 kpa range usually. I haven't seen any KR over 140 kpa, but have seen one or two random hits at as low as 60kpa. I have also started splashing in a gallon or two of 110 octane per tank to see if it makes a difference, which it hasn't.
Any thoughts?
I recently converted my turbo LQ4 from a t56 to a 4l80e. The tune was solid with the T56. I could beat on it all day long and never see any KR. 91oct/X2 M10 meth inj.
After the 4l80 install I'm picking up random KR. I made a few changes to the exhaust too, though I don't think it's hitting anywhere. I'm using a stock converter and the KR is sometimes when not in boost, 80-140 kpa range usually. I haven't seen any KR over 140 kpa, but have seen one or two random hits at as low as 60kpa. I have also started splashing in a gallon or two of 110 octane per tank to see if it makes a difference, which it hasn't.
Any thoughts?
