So 165 kpa = 23.9 psi. If you take away normal atmospheric pressure (1 kpa or 14.5 psi) then you're looking at around 9.5 psi of boost. 11.5:1 is a reasonable and safe (although not optimal) AFR. I prefer around 12.5:1 once everything else is stable. It is possible that the low ignition advance would cause a very hot O2 sensor at that AFR.
For some reason I'm still worried that you've either got a slipping blower belt or you need a smaller pulley. I think you're on the right track about the spark advance.
mpp
Quote:
Originally Posted by JohnJL
Awesome, thanks!
Well isnt it interesting what you find when check your work...I didnt hover over the tuner while he was doing his work but now going back over his logs I see some interesting information.
Most interesting is that the Dyno was measuring a max of 11 psi boost. However loking back at the logs I was getting a heck of a lot more than that...up to 23psi!?
Looking at the logs I see boost ramping up rapidly, up to 165 kps (23 psi, 1.62 BAR) at 4200 rpm! AFRs are 11.5:1 and ignition was massively retarded at 4-8 degrees btdc. That would explain the dead Innovate 02 sensor...must have burned it up!
That looks like a "smoking gun" to me. The dyno's MAP was way off (Maybe it was calibrated for 1 bar, not 3 bar?) and ignition was also off.
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