Today I did some logs with BM3. It was 3x3rd gear and 2x4th gear pulls, ambient temp was 27C, Stage2 91 octane v5.7 map with 98 octane fuel.
Here is the log.
Please comment if something seems wrong with it.
What i noticed and I'm curious if there's a problem or not.
HPFP seems ok up to the max rpm, it doesn't drop, and i didn't have any knock.
I noticed some difference in ignition timings:
- During second pull at about 4k RPM cyl 3&5 dropped 3 deg then gradually they caught up with the rest at about 6k RPM.
- In the 3rd pull only cyl 3 did a drop around 2.5k then another at 3.5k, then gradually caught up.
- In the 4th run cyl 3 again dropped at 5.5k then caught up with the rest but later cyl 1 dropped at 6-4k.
- In the last 5th pull cyl 1 and 4 did a drop around 6.4k.
So the question is that are these drops normal or they're related to octane problems or bad ignition plugs or something else.
My mileage is 29k km and i'm planning to switch to the recommended colder NGK plugs with 0.05mm gapping. And should i give a try to 93 octane map?