Good morning fellas.
Can you guys help me with sharing some of your experience? I have a few questions and if you would rather me start separate threads for each question just say to, but for the mean time I'm gonna throw them all on here and see If I can get some clarity.
LS1 with a 4" crank, TEA 220 heads, 236 I, 248 E, @ .05", .620" and .610" lift and 115 LSA cam, centrifugal blower, stock intake and throttle body.
1. On a 2 bar operating system, does the LTFT function above 105 KPA? Depending on the answer I will probably have more questions. I was seeing LTFT affecting my first few low boost tests until I discovered a couple things. I learned how to clear the LTFT (could't find it at first) and Getting the right PID's and charts setup for monitoring the MAP correctly after moving to a 2 bar MAP sensor and latest version of HPT software. I'm thinking the ECM was still using the 105 KPA cell when I had the PID's setup wrong and was populating LTFT's even in the low boost areas.
2. Can you guys help me with idle surge/hunt and lite load/low rpm surge? I'm just now starting to dive into the drivability side as I finally feel somewhat comfortable that the combo does not have to come back apart. I took what I think is a big swing at the ignition timing tables in an attempt to stabilize the timing in the surging area, although it did help significantly there is still enough there I would like to see if I/we can do better.
3. What channels do you guys log in attempt to solve the surge/hunt type situations?
24-05-06 06-43-59.hpl
24-05-06 06-52-55.hpl
2000 fueling and timing 35.hpt
4. One of the logs is of only steady state surge/hunt. One on the logs is of a low boost short pull after I learned how to clear the LTFT's. Can you guys look over both along with the tune file and offer you insight please and thank you.