cij911

iTrader: (14)

I am currently running my IX at 25 psi @3600 rpm (peak) in 3rd gear tapering to 20.5 psi @ 6800...My AFRs are ~11.5 - 11.6 from 3500 to 6800 but my IDCs are > 90% from 5000 RPM up and are 98% + from 5800 RPM up...

I am seeing a tad of knock (3 counts or less) from 5800+ so I am wondering if the injectors are maxed out and causing knock issues or if I am just running too much boost (@5800 I am @ ~23.5 psi). Although I am getting knock, my Octane Flag is still staying at 100 and timing does not appear to be being pulled.

For a reference :

@3600 RPM timing is 4/5, AFR = 11.4, 2 counts knock, IDC 68%
@6000 RPM timing is 9, AFR = 11.4, 3 counts knock, IDC 99%
@7000 RPM timing is 14, AFR = 11.7, 2 counts knock, IDC 102%


So the question is, should I:
(a) reduce boost
(b) get injectors -- recommendation please
(c) get a meth / alk kit
(d) other - please be specific

Thanks a bunch!