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  1. #1
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    Dinan Stage 2 550i data logs

    Just received my Bavarian Technic scan tool and ran some logs this morning. I'm only getting ~4Hz sample speed so I need to check the settings on my laptop, I was hoping for 8-9 which will give a much better picture of what's going on. These are 3rd gear WOT pulls from ~3k to ~6k RPMs.

    I made it back to the track yesterday and had a lousy day - I maxed out at 110 over 10 runs, which is 3mph lower than my best run last time, so glad to have a tool to log engine variables to see what's going on.

    Having said that, the logs actually look ok to me. I thought maybe I was getting clutch slippage but it looks from these logs like the DTC cut the throttle briefly which slowed down the rate of acceleration. On the track I had DTC completely off, I will need to do a couple more pulls with the same settings to confirm.

    Another interesting note is the IAT readings. This engine runs hot, it's good to see that the intake is effective in keeping temps down. On my previous car you would see the IAT go down when you started accelerating but then move back up as the engine begins to heatsoak. These are short pulls, but looks pretty good!
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    Click here to enlarge Originally Posted by alextremo Click here to enlarge
    I made it back to the track yesterday and had a lousy day - I maxed out at 110 over 10 runs, which is 3mph lower than my best run last time, so glad to have a tool to log engine variables to see what's going on.
    Mind posting the slips?

    Thanks for logging not really any logs available for this motor.
    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale: http://www.boostaddict.com/showthrea...r-kit-for-sale

  3. #3
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    Looking it over your throttle was cut for some reason and I don't get why.
    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale: http://www.boostaddict.com/showthrea...r-kit-for-sale

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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    Mind posting the slips?

    Thanks for logging not really any logs available for this motor.
    Sure - I'll post up a couple later today.

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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    Looking it over your throttle was cut for some reason and I don't get why.

    I assumed that was DTC interfering, will need to do some more pulls with DTC inactive to confim.

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    Click here to enlarge Originally Posted by alextremo Click here to enlarge
    I assumed that was DTC interfering, will need to do some more pulls with DTC inactive to confim.
    I don't know why it would cut right then a that RPM especially once you turned it off.
    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale: http://www.boostaddict.com/showthrea...r-kit-for-sale

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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    I don't know why it would cut right then a that RPM especially once you turned it off.
    No, DTC was on for those pulls - I need to turn it off and test again. I didn't plot rpm as a line on this chart, but if I did you'd see a small bump in the rpm line right before that throttle closure. I think it's either the very beginning of wheel spin, or my clutch is slipping. Since the road speed doesn't spike with the rpm, I think it might be the latter.

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    Click here to enlarge Originally Posted by alextremo Click here to enlarge
    No, DTC was on for those pulls - I need to turn it off and test again.
    Ohhhhh ok, you definitely need to run with it off.
    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale: http://www.boostaddict.com/showthrea...r-kit-for-sale

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    Hey, great stuff seeing N63 logs! Looking forward to more

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