I just can't figure this out. I can't find anything wrong but this ski won't run much over 8000 rpm @ 71 mph. The most annoying thing is a bad surge at around 7000 rpm. The logs shows the timing with a significant drop in that area at 140-160 kPa and I have no idea why. The tune is mostly stock with mainly speed limit removal and I don't see anywhere in it that should be pulling timing and KR isn't an issue. This is driving me nuts. Does anyone have any ideas before I run this thing into the rocks and let it sink?
It has an IMUK delete, intake girdle, Fizzle intercooler, Fizzle hoses with BOV, Worx catch can, and a 90 rear intake. New plugs, Rotella T6 oil not over filled. Compression is 130-135 for all cylinders. I set the supercharger slip to 15 ft-lbs. New wear ring, new 21+ impeller. I also tested it with a new MAP sensor today with no improvement.
I will say the AquaSport IMUK delete kit is shit. Don't buy it. It's not made right and requires a bunch of extra plastic to be removed to fit. However, I don't think it's leaking so I don't think that's my issue, but I'm pretty lost and open to any suggestions at this point.
I have a few other logs from today, but this one looks to show the surge issue the best.
Timing drop.png