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  1. #1
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    JB4 60-130 Results

    Hey guys,

    For those interested here are a couple 60-130 runs from our 135i. This is using the latest JB4 meth firmware and settings, along with the new intercooler, seat removal, and a couple gallons of race gas mixed in for good measure.

    8.57 seconds on a ~1.8% slope, and 8.82 seconds on a ~0.4% slope. Overall pretty happy with the results and I think they can be improved with short shifting. Also ran a 11.7/125.5mph trap on the .4% slope.

    Click here to enlarge

    Click here to enlarge

    Click here to enlarge

  2. #2
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    Pretty impressive!

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    Why is the boost additive 70 when you are only hitting ~18psi and maxing out PWM? Wouldn't it be just as fast with a ~60 additive? Just trying to understand. Nice runs! Were these runs faster than the previous firmware?
    Click here to enlarge


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    maaaan.. im starting to miss being fast

  5. #5
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    amazing for stock turbos and a few boltons...very cool!

  6. #6
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    Click here to enlarge Originally Posted by Forcefed Click here to enlarge
    Why is the boost additive 70 when you are only hitting ~18psi and maxing out PWM? Wouldn't it be just as fast with a ~60 additive? Just trying to understand. Nice runs! Were these runs faster than the previous firmware?
    Would likely be around the same speed with a 60 additive. On race gas though the 70 additive gives it a bit more boost later in the run when EGT heats up. It was hitting around 19psi tapering to around 15psi at redline. Raw performance is basically unchanged for the past few years but recent changes make it a little easier and safer to reach those limits.

  7. #7
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    Wow, 125.5MPH with stock turbos! Is that a record? I know there were some Sac slips on stockers, but that was when they were inflated. I think HR may have ran those VBOX MPHs at some point.

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    Terry, can you post the vbox graph of the 1/4 mile run if you have it...

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    Ahhh I'm resisting going meth.......but these numbers are impressive!
    Click here to enlarge
    ESS 6XX kit

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    1 out of 1 members liked this post. Reputation: Yes | No
    wow

  11. #11
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    Click here to enlarge Originally Posted by 2Slow Click here to enlarge
    Wow, 125.5MPH with stock turbos! Is that a record? I know there were some Sac slips on stockers, but that was when they were inflated. I think HR may have ran those VBOX MPHs at some point.
    Maybe in theory but with a similar amount of power at Famoso the best it's gone is something like 122.8mph w/ 1000' DA. If I could bottle up some 50 degree weather and take it with me to a track I'm sure it would get close to 124mph though! I'll post up those runs when I get back to my home PC.

  12. #12
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    Click here to enlarge Originally Posted by dzenno Click here to enlarge
    Terry, can you post the vbox graph of the 1/4 mile run if you have it...
    Every time I use that VBOX software I feel like this: Click here to enlarge

    Here is the best MPH run. 11.9 on the VBOX, but says 12.08 in the chart due to that roll out difference. The 11.7 runs were "only" 124mph I guess.
    Attached Images Attached Images  

  13. #13
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    That's awesome! Meth = 100%? 95 octane?

    Oh, and stock catback FTW! Click here to enlarge nice and quiet

  14. #14
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    Half 91 octane half 98, so 95ish. Meth close to 100% since this was an all out type effort. It's a sleeper, unless you notice the drag radials and missing seats. Click here to enlarge

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    So 245 DRs are holding without much spin eh? I've been debating 245 or 275 in the back, NT555Rs as well for my summer 17x9s

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    With 2nd gear launches they do spin a bit and I also have a quaife, but it's manageable. The car is downright unsafe with the OEM runflats though. I've always preferred the 245s as I run 8.5" rims. With 9" rims I'd probably go 275.

  17. #17
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    I've got a set of brand new hoosiers sitting, 275s, for the strip...but on the road i may go 245 DRs as I won't be launching in 1st or 2nd at all, just some pulls here and there a probably a bunch of 60-130s...less rolling resistance less unsprung weight..given you're ok launching in 2nd i should be definitely ok doing pulls starting in 3rd given your 500wtq is up there

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    That is so freakin fast man.
    Burger Motorsports
    Home of the Worlds fastest N20s, N54s, N55s, S55s, N63s, and S63s!

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  19. #19
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    Click here to enlarge Originally Posted by Terry@BMS Click here to enlarge
    Every time I use that VBOX software I feel like this:
    Same, I hate that damn software.

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