Ok guys finally got my ls ef9 running. So heres my problem I would love to dd this car or at least be able to not have to run 100 octane. I need to know if I can.
Please add if you need more info.

Also, What is the worst that will happen if I continue to drive it? I'm not reving past 4k. Is the worst thing that would happen be my headgasket going or what?


Mod list - nonmotor stuff.:

JE 12.7:1 Pistons <---------- HOLY MOLY! (I didn't really think this one through.)
Eagle H rods
ACL bearings
bored out to 82mm
type r water pump
type r oil pump
Lightened and balanced crank
Benen Fuel rail
Chipped
blox intake mani
blox cam gears
blox fuel pressure regulator
Bosch Platinum plus spark plugs
Resurfaced head
Complete valve job
Ls injectors<----------------------------------------------- I think thats the problem.
Megan Crank Pully
GS-R timing belt
Swap Shop Racing Obd-0 to Obd-1 Harness
ARP Headstuds
Walbro 255 LPH-HP Fuel Pump
Fidanza 7.5 lb Flywheel
Blox Fuel Pressure Gauge
12" slim fan
Obd-1 P75
ACT heavy duty clutch
d16 throttle body