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    • Rob Beck upgraded turbo N54 335 1/4 mile drag strip numbers

      To do some street setup track testing. I wanted to see how my current DD setup actually performs in the real-world. And now I know. I got 3 runs in, the track was crazy packed, A LOT of cool-down time.. So, full weight, 93 oct pump/meth 90/10 mix. map 7, meth map1 (18.5psi)
      The first 2 runs were done on street tires because i wanted to see how that would go. Video's are in the link below the slips.

      I also used my Gtech on the 3rd run to test how accurate it actually is. and as you will see in the pics, it reads .1 fast, and about 1mph fast as well.. not oo bad really..

      First run here:

      horrible 60's as expected, i guess im not as good as i used to be at feathering the throttle. I heard a slight pop more tha half-way through the track and didnt think anything of it. turns out i was one of the boost/vacuum tubes split. so that explains the low mph. A quick fix, as i now carry a few feet of tube in the trunk since this has happened before..



      http://sharing.theflip.com/session/6...video/18588414

      Next run much better.. BUT.. like an idiot, i was so worried about shifting at the right RPM, i shifted to 5th around 5800rpm, which is just before the end of the 1/4. so i knew it had more in it..



      http://sharing.theflip.com/session/b...video/18588442


      and 3rd run.. decided i was tired of being in the 12's, but also worried about snapping something, since stock turbo, and now upped turbo guys are snapping halfshafts with ease, i decided to take it a bit easier on the launch, but still wanted something decent.. Looks like im gainin 30mph on the back end.. not too shabby



      http://sharing.theflip.com/session/1...video/18588453



      So there you have it.. A few people have been complaining that us N.E. guys have problems going fast. Well, thats just not the case today. As ive said before 17/18 psi is where these RB Turbo's really take over and kick the shit out of stock turbo's. In my full interior, no weight reduction (except DR on K1's) you can see the power these bad boys are putting out. Even more so now, you can see that the run I had Vs Byzantine's Lambo was no fluke. He has said he traps 123mph rolling through the 60' and I believe him. I/we can only guesstimate what I can do at 21 psi with some major weight reduction like the top players do. As a matter of fact, im looking into getting a set of K1's for the front, a Braille battery, and maybe one day ill pull the seats out. But for now, I am more than satisfied with what my car, with the RB Turbo's, paired with the JB3 can do.

      For right now. i think im done with track testing until i get my hands on the "JB4".

      Oh, BTW, there were lots of nice street cars there. The wife got one run of a new, 100% stock GTR on video. You can hear the tower at the end call hit time, which was 11.5@119, on the lower end of mph's for a stock GTR.

      http://sharing.theflip.com/session/f...video/18588523

      well.. while im at it. i guess ill post it, its kinda embarrasing though. I did get a 4th run in. But i redlighted, waited for a few seonds as i thought about what an idiot i am to screw up on my last run of a a good might of testing. But i guess its ok, since i saw the Vc2 flash the 0.01 telling me low flow about 100' b4 the end of the 1/4, which means it dropped maps back to map 7. causing me to lose out on a 124mph pass, maybe, dare i say even a 125 mph? I dont know since my laptop again died while waiting in the staging lanes for hours. Noticed it was my highest 1/8 mph of the night.. damn shame I messed that one up..



      http://sharing.theflip.com/session/b...video/18588481

      So in summary. in my DD-ie full weight and 93oct/meth setup im as fast, if not faster than all but the freakishly, and questionably faster N54's.
      Im gaining 30 mph on the back half.
      This article was originally published in forum thread: SO I took the RB twins to the dragstrip yesterday.. started by LostMarine View original post
      Comments 39 Comments
      1. LostMarine's Avatar
        LostMarine -
        Click here to enlarge Originally Posted by dzenno Click here to enlarge
        LM, if you have an LSD you don't need to worry about halfshafts snapping as much as without the LSD

        *as much* doesn not mean *at all* so in a time where i thought i was done modding, i have now found another $5k in things i would like to do, and halfshafts are on the list, but toward the end..

        but i did ask this question before and noone explained why i would need to worry *less*
      1. oddjob2021's Avatar
        oddjob2021 -
        because all the torque wont be translated to that respective side. you should watch a video on diffs. if one wheel locks up on the launch (is stickier, lower pressure who knows what) the open diff is going to push all the torque on the half shaft that is spinning... that is the problem with an open diff. with an lsd, the power is modulated between the shafts with clutches or gears depending on the type of lsd. but honestly where you'll 'feel' the most difference is on a road-course. its just so much more predictable exiting corners hard and the tail is never squirrely like with an open diff.
      1. Doug007's Avatar
        Doug007 -
        Click here to enlarge Originally Posted by oddjob2021 Click here to enlarge
        because all the torque wont be translated to that respective side. you should watch a video on diffs. if one wheel locks up on the launch (is stickier, lower pressure who knows what) the open diff is going to push all the torque on the half shaft that is spinning... that is the problem with an open diff. with an lsd, the power is modulated between the shafts with clutches or gears depending on the type of lsd. but honestly where you'll 'feel' the most difference is on a road-course. its just so much more predictable exiting corners hard and the tail is never squirrely like with an open diff.
        If all the torque gets transfered to the side without traction, wouldn't that make an open diff LESS likely to snap a half shaft?

        I personally think that the failures occur on shock loading (within less than 0.1s), well before an LSD has a chance to shift any torque...

        Stick to rolls if you want to keep your half shafts in one piece!
      1. themyst's Avatar
        themyst -
        LM i think the benzo boys are setting up a track rental at Atco on 10/7. I'm thinking about going... although I will be trapping far less than these tune/bolt-on C63s. In optimal conditions 120 tops on 93+meth? My god those things go fast with next to nothing.

        Time for a .28 jet and beat on some AMGs Click here to enlarge
      1. LostMarine's Avatar
        LostMarine -
        $#@! YEA!! Got a link!? Im down for this if im here!
      1. JPSlick's Avatar
        JPSlick -
        You got a lot more left in the car LM.... Let her rip already!
      1. LostMarine's Avatar
        LostMarine -
        Click here to enlarge Originally Posted by GarageKeptE92 Click here to enlarge
        You got a lot more left in the car LM.... Let her rip already!
        lol.. thats the problem.. all the $$ is in the car as well, and not my pockets

        Getting ready for a career shift so the car budget is in a recession right now
      1. themyst's Avatar
        themyst -
        LM -

        http://www.mbworld.org/forums/c63-am...o-oct-7th.html

        You should go and make some noise. I'm not going, I'll be the slowest car there Click here to enlarge
      1. LostMarine's Avatar
        LostMarine -
        not for sure i can make it that day, but im posted up as in.. time to figure out how to pull these seats.. such a shame boostedcosta didnt sell him his k1 front wheels.. would have been an easy new record..
      1. themyst's Avatar
        themyst -
        sell who the front wheels? you? I'm not understanding what you wrote. I know Qmax bought his rears.
      1. LostMarine's Avatar
        LostMarine -
        $#@!! yea, i was trying to get his fronts.. he said someone bought the whole set..
      1. themyst's Avatar
        themyst -
        Click here to enlarge Originally Posted by LostMarine Click here to enlarge
        $#@!! yea, i was trying to get his fronts.. he said someone bought the whole set..
        Probably Qmax. He seems the type to roll around on koseis on a Friday night looking to pick a fight Click here to enlarge
      1. LostMarine's Avatar
        LostMarine -
        well, im in for that Atco rental.. if all goes well time to pull some weight off and bump the boost up a bit Click here to enlarge
      1. themyst's Avatar
        themyst -
        Click here to enlarge Originally Posted by LostMarine Click here to enlarge
        well, im in for that Atco rental.. if all goes well time to pull some weight off and bump the boost up a bit Click here to enlarge
        Get your ET Streets on that thing and pull on some AMGs Click here to enlarge They have some cars there that trap over 120, (dodger63 traps 123) so I'm sure you can pack a wallop.
      1. LostMarine's Avatar
        LostMarine -
        we shall see Click here to enlarge
      1. Mthis's Avatar
        Mthis -
        just saw this on MBW but ill post here, your car should be beast if you running upgraded turbo's and more boost, i hope you can make it to the track on the 7th you will have alot of AMG's to play with, i think out of the c63's only me and dodge63 will give you the best run do. hope to see you there and thanks for you service oversea's.
      1. LostMarine's Avatar
        LostMarine -
        After just reading Irish new time im gonna have step my game up, no more pussy-footing with street setups
      1. mazdaspeed6's Avatar
        mazdaspeed6 -
        Hey LM next month when I get my new twins bolted up were gunna have to meet up Click here to enlarge
      1. Irishace's Avatar
        Irishace -
        Click here to enlarge Originally Posted by LostMarine Click here to enlarge
        After just reading Irish new time im gonna have step my game up, no more pussy-footing with street setups
        Now that's the spirit. There is no point in worrying about your half shafts. Just let her rip brother! I want to see these things in serious action. I am ever hopefull that if I slap these things on my car I could flirt with a 10 second pass.