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  1. #1
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    1 out of 1 members liked this post. Yes Reputation No

    Talking N54 tune lean-run safeties

    Click here to enlarge Originally Posted by enrita Click here to enlarge
    WTF guys!
    I got the car at my usual shop for some work to be done, mostly change both front widebands lambda ( i have the one for cyl 4/5/6 off by a lot and thank god procede show me that through the logging of AFR and lean run safety)
    To correct, Procede does not have lean run safety.

    This has been bothering me a lot lately since there are many who seem to suffer from a sudden lambda problem... too many for it to be lambda problem. I believe there is a problem in the tuning. It can be that biasing and reading lambdas simultaneously does not work well. Procede suffers from this problem, but it could be more generic. What makes this very problematic is that Procede does NOT have lean run safety. So you may run lean without even knowing it.

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    Click here to enlarge Originally Posted by 654 Click here to enlarge
    To correct, Procede does not have lean run safety.

    This has been bothering me a lot lately since there are many who seem to suffer from a sudden lambda problem... too many for it to be lambda problem. I believe there is a problem in the tuning. It can be that biasing and reading lambdas simultaneously does not work well. Procede suffers from this problem, but it could be more generic. What makes this very problematic is that Procede does NOT have lean run safety. So you may run lean without even knowing it.


    hhmm... food for thought i guess.

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    Click here to enlarge Originally Posted by 654 Click here to enlarge
    To correct, Procede does not have lean run safety.

    This has been bothering me a lot lately since there are many who seem to suffer from a sudden lambda problem... too many for it to be lambda problem. I believe there is a problem in the tuning. It can be that biasing and reading lambdas simultaneously does not work well. Procede suffers from this problem, but it could be more generic. What makes this very problematic is that Procede does NOT have lean run safety. So you may run lean without even knowing it.
    Interesting, do the others have lean run safeties?

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    Click here to enlarge Originally Posted by mazdaspeed6 Click here to enlarge
    I work lots of overtime... Inline for a promotion, then I'll be making 80k at the age of 21 Click here to enlarge
    We accept donations.

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    Click here to enlarge Originally Posted by enrita Click here to enlarge
    no they dont and please keep this thread clean about this talk. this is purely for turbo upgrade status and performance thanks .
    We try enrita, we try. Sometimes we get curious and go OT but if that happens I will move any of it to another thread.

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    Off topic but we have a lean-run safety in the JB4. Once you are reading OEM wideband data it's just a few lines of code to implement.

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    Click here to enlarge Originally Posted by Terry@BMS Click here to enlarge
    Off topic but we have a lean-run safety in the JB4. Once you are reading OEM wideband data it's just a few lines of code to implement.
    Yes, this is true and I will be reporting back on the results of JB4 lean-run protection testing soon. It will be put to the test at Famoso along with full JB4 nitrous control.

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    Click here to enlarge Originally Posted by Terry@BMS Click here to enlarge
    Off topic but we have a lean-run safety in the JB4. Once you are reading OEM wideband data it's just a few lines of code to implement.
    Is this the only tune with this safety?

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    I believe so
    JB4LIFE

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    Click here to enlarge Originally Posted by mazdaspeed6 Click here to enlarge
    I believe so
    Well that is quite the one-up.

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    my best friend who is an engineer and the only one who checked my engine n54

    is very surprised at the great work he has done in the JB4 terry

    this song is going to give a lot of talk this year in spain
    [SIGPIC][/SIGPIC]

  12. #12
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    My first nitrous project is going on a 22RE from a 94 Toyota pickup. Click here to enlarge

    Wish IT had lean-safety like the JB4 Badassness! Hopefully I don't blow my friend's truck up, wish me luck. Click here to enlarge

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    How does this safety work? Just cuts power if it detects the car running lean?

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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    How does this safety work? Just cuts power if it detects the car running lean?
    Probably throws in extra fuel, closes throttle, reduces boost, cuts nitrous solenoid signal, etc.

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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    How does this safety work? Just cuts power if it detects the car running lean?
    There are two of them. The normal safety just has a fixed AFR value and reverts to map 0 if you go above that during WOT. What CBR is talking about is the nitrous integration user defined AFR. He uses an external LM1 wideband, and then can define how rich the car must be for the nitrous output to activate. If he leans out nitrous cuts out. If he leans out enough he will also kick out to map 0.

    With the OEM sensor it's difficult to get an accurate reading while at the same time altering the signal back to the ECU. So fudge factors must be incorporated in to the software. If your life is on the line an external sensor is much preferred for the run lean safety. But the OEM sensor is good enough for the average user and much better than the JB3 method of fuel pressure only.

    Click here to enlarge

  16. #16
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    Terry, damn it, click "attach inilne" so the image resizes instead of "instert attachment" Click here to enlarge

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    hey terry what secondary wideband would you recommend?
    JB4LIFE

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    LM1 seems to work well. I use it here. Click here to enlarge

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    I have the whole kit with tailpipe adapter and 1980s style controller to move it from car to car. But I think they offer a simple 5v output only system for less money. I'd have to check with them though. The sensor is going to be the same either way!

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    Ok thanks, can you use a aem wideband?
    JB4LIFE

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    Anything that has a 0-5v output! Click here to enlarge

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    Ok thanks Click here to enlarge
    JB4LIFE

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    Is that for meth users too ? Or nitrious only ?

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    Most of those fields are for nitrous setup. The progressive meth setup is above it.

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