Quote:
Originally Posted by 1897
Anyone able to diagnose what's causing large timing corrections in two cylinders?
In my initial run there were no corrections:
https://datazap.me/u/1897/log-159335...23-24-25-26-27
but by the third run, IAT had increased and I started to get small corrections on 4 cylinders and very large (up to 7.5) corrections on cylinders 5 and 6
https://datazap.me/u/1897/log-159335...23-24-25-26-27
It was a hot day (mid to high 80's F) and I am still using a factory intercooler. Using 93 octane gas.
other mods:
Injen cold air intake and charge pipe (not sure of brand)
VRSF catless downpipes
MHD Stage 2 tune
Bosch plugs with 8k (according to PO) but have discoloring on all plugs.
aftermarket coilpacks 8k (according to PO) but have lots of discoloring on two |
I would not correlate those corrections with IATS at all. The correction on cylinder 6 starts when IAT's are only 100f lol in the previous logs you have 0 corrections across the entire log with IAT's as high as 120f+
The first log you did a pull with oil temps at 165f...just barely across the line of being warmed up. In the second log your oil temps are 220+ and rising still. I bet your coolant temps are high which will result in drastically more impact on the point of knock than 120f iat's will. Re-do the logs showing coolant temps. Do you run the MHD race cooling settings? that will help get coolant temps back down in-between runs. Lower coolant temps then in turn help mitigate rising oil temps and overall the engine will be able to move heat away from the combustion chamber more efficiently.