Another S/C'd member worried about his AFR

[LtNoogie]

I have not heard audible evidence of knocking like I did before I filled up with 91 octane. The only reason that I am guessing there is knocking is the ingition timing being retarded. I know others have to add octane boosters to stop their audible knocking.

I'll reset the ECU on Sunday and try the tests suggested.

[largeorangefont]

Originally Posted by LtNoogie

I have not heard audible evidence of knocking like I did before I filled up with 91 octane. The only reason that I am guessing there is knocking is the ingition timing being retarded. I know others have to add octane boosters to stop their audible knocking.

I'll reset the ECU on Sunday and try the tests suggested.

Yea you are going to need to run 91 all the time now. Do you have the wiring diagram for your black box? It sounds like my suspicion that Blitz changed what the black box does might be true according to Camelll.

[eTiMaGo]

Originally Posted by camelll

Are you using the r-vit? If so get on it and let us know how it works.



This information is for the R-fit and not the r-vit and (can be used in conjunction though) is from 2004 but it is the latest updated list they have on the blitz website page 25, does not show the ncp91. This could be a little out of date but .

I am curious if someone is gonna try the r-vit though to see if it is gonna work.

It should work, in theory when you're in open loop you can tweak all you want within the limitations of the fuel pressure and injectors?

Originally Posted by largeorangefont

Yea you are going to need to run 91 all the time now. Do you have the wiring diagram for your black box? It sounds like my suspicion that Blitz changed what the black box does might be true according to Camelll.

Yeah I am still not sure how the clutch gets the information from the gear... sounds like it ties in to the starter circuitry (the part which requires you to press the clutch on a manual, or have the auto in P or N before the engine will crank).

Anyway, looking at the new data Pavel logged, it looks like there is a correlation between throttle % and closed loop mode. It was a pretty short run but it looks like above 75% throttle, the system switches to open loop. So, perhaps the blitz unit is reporting 100% throttle to the ECU no matter what, once it kicks in the SC?
Now this is something that Long can check with the scangauge, see what is the reported throttle angle once the SC kicks in... If it jumps from actual throttle position (say 50%) to a much higher value, then bingo, we know how to trigger open loop safely

[largeorangefont]

Originally Posted by eTiMaGo

It should work, in theory when you're in open loop you can tweak all you want within the limitations of the fuel pressure and injectors?



Yeah I am still not sure how the clutch gets the information from the gear... sounds like it ties in to the starter circuitry (the part which requires you to press the clutch on a manual, or have the auto in P or N before the engine will crank).

Anyway, looking at the new data Pavel logged, it looks like there is a correlation between throttle % and closed loop mode. It was a pretty short run but it looks like above 75% throttle, the system switches to open loop. So, perhaps the blitz unit is reporting 100% throttle to the ECU no matter what, once it kicks in the SC?
Now this is something that Long can check with the scangauge, see what is the reported throttle angle once the SC kicks in... If it jumps from actual throttle position (say 50%) to a much higher value, then bingo, we know how to trigger open loop safely

Yes, Long could check that, but I think the system is more sophisticated than that. There are many other systems that require correct and accurate reporting of throttle position.

There is more than one metric that triggers open loop. Generally speaking there is RPM, Load, and TPS. Depending on the ECU, the car could be using one or all 3 as reference points.