• Stock E60 M5 takes on a tuned Mercedes-Benz CLS550 M278 bi-turbo (CLS500 overseas) from a stop and from a roll

      This is supposedly a stock E60 M5 and BimmerBoost will give the benefit of the doubt even though the M5 just flat out runs away from the CLS550 with the twin turbocharged M278 powerplant which responds very well to modifications. The problem though is the CLS is running some crappy piggyback BenzBoost has never heard of. Renntech has gotten the M278 with their flash up to 489 wheel horsepower as the Mercedes M278 versus BMW N63 comparison article on BenzBoost shows so a good tune should beat a stock E60 M5.


      Even when the cars run from a stop and the CLS is able to get the better launch (automatic turbo car is much easier to launch especially when brake boosting than the E60 M5 SMG) the E60 M5 still runs it down and passes it like a freight train coming by. Whomever it is with that CLS550 needs to ditch their Benzin Module Performance Boost Box and get a real tune. Video below.

      This article was originally published in forum thread: E60 M5 vs Tuned CLS500 BiTurbo started by TZ04XJR View original post
      Comments 24 Comments
      1. benzy89's Avatar
        benzy89 -
        Click here to enlarge Originally Posted by Flinchy Click here to enlarge
        looking for 60-130 times, and 1/4 times... the 335i seems at least on par? - a stock E60 M5 does a.. what.. mid 10 60-130 and 12.5 1/4?
        The 335 def has the weight advantage, in addition to having better TQ, but the S85 M5/M6 has significantly better top end & really won't shine until you get over 100. The SMG II extra gear is def not a moot point because it keeps the S85 in it's high RPM powerband. Specifically referring to your data, the S85 M5/M6 actually is reaching peak power at 8200 RPMs where the N54 at 6900 RPMs is well out of it's powerband (the turbos have to be tapered down to ~15psi at that RPM / OEM turbos have to start decreasing boost by 5500 RPMs)





        Once the S85 SMG II gets into 4th gear, the car is going to catapult forward while the N54 135/335 gets left it the dust because of poor gearing & lack of top end HP
      1. Flinchy's Avatar
        Flinchy -
        Click here to enlarge Originally Posted by benzy89 Click here to enlarge
        The 335 def has the weight advantage, in addition to having better TQ, but the S85 M5/M6 has significantly better top end & really won't shine until you get over 100. The SMG II extra gear is def not a moot point because it keeps the S85 in it's high RPM powerband. Specifically referring to your data, the S85 M5/M6 actually is reaching peak power at 8200 RPMs where the N54 at 6900 RPMs is well out of it's powerband (the turbos have to be tapered down to ~15psi at that RPM / OEM turbos have to start decreasing boost by 5500 RPMs)

        http://youtu.be/OpQ5j8KzuwU

        http://youtu.be/7oVR41Qh7GM

        Once the S85 SMG II gets into 4th gear, the car is going to catapult forward while the N54 135/335 gets left it the dust because of poor gearing & lack of top end HP
        M5 is definitely impressive, absolutely love the S85

        N54 really needs to have a higher powerband... the only thing i don't like about it lol

        Pity an S85+transmission runs near $12k haha.. let alone ECU and other bits lol
      1. benzy89's Avatar
        benzy89 -
        Click here to enlarge Originally Posted by Flinchy Click here to enlarge
        M5 is definitely impressive, absolutely love the S85

        N54 really needs to have a higher powerband... the only thing i don't like about it lol

        Pity an S85+transmission runs near $12k haha.. let alone ECU and other bits lol
        The N54 def will benefit from a major turbo & fueling overhaul like with the Single Turbo or Vargas Stage 3s, but it'll be interesting to see A) how the internals hold-up and B) if a better, safer tune can be made with an adjusted CR. You can swap out the turbos, but don't expect a motor that's going to rev out to 8200 RPMs (like the UGR TTs). All your big HP turbo cars (Nissan GTR, Porsche 997, Toyota Supra) all redline by 7k, all are 6-cylinders & all run a fairly high CR. The biggest impact to shift the powerband shift depends on if the aftermarket hype continues to build this motor up as a Euro-2JZ + someone eventually develops new cams to be paired with a properly tuned & running single turbo.
      1. Flinchy's Avatar
        Flinchy -
        Click here to enlarge Originally Posted by benzy89 Click here to enlarge
        The N54 def will benefit from a major turbo & fueling overhaul like with the Single Turbo or Vargas Stage 3s, but it'll be interesting to see A) how the internals hold-up and B) if a better, safer tune can be made with an adjusted CR. You can swap out the turbos, but don't expect a motor that's going to rev out to 8200 RPMs (like the UGR TTs). All your big HP turbo cars (Nissan GTR, Porsche 997, Toyota Supra) all redline by 7k, all are 6-cylinders & all run a fairly high CR. The biggest impact to shift the powerband shift depends on if the aftermarket hype continues to build this motor up as a Euro-2JZ + someone eventually develops new cams to be paired with a properly tuned & running single turbo.
        Indeed, soon enough Click here to enlarge

        A) well 6xx ft-lb so far, probably will see more with high boost VTT3's, and MUCH higher cylinder pressures.. I doubt VFF ST has higher cylinder pressures

        B) find me one of those models at HIGH power with a 7000 redline. You'll find 2jz's are more like 9000rpm, 4g63 will be at least 8000-8500, more likely higher.. Rb30+ will br 9000 odd, rb25/26 will be 10k+

        w gtr's i'm not sure but 8000 rings a bell.

        Most will also run a 9-9.5:1 cr at most, and come 8.5-9

        the only thing stopping the n54 from revving out to 7000 (8000 with the right upgrades at least) is a turbo setup large enough to push enough air at those rpm's.. Which a good single or stage 3's shoukd do Click here to enlarge