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  • The Ghost's Avatar
    Today, 11:25 PM
    Updated
    18 replies | 1573 view(s)
  • blackshan's Avatar
    Today, 11:24 PM
    That was beautiful! He needs to put that top up. Two great cars.
    1 replies | 99 view(s)
  • MM Performance's Avatar
    Today, 11:23 PM
    Repd for adding data/info can you add a few more details such as wtq, how the failure happened, what you think the root cause was so that we can apply learnings?
    18 replies | 1573 view(s)
  • The Ghost's Avatar
    Today, 11:21 PM
    N54, FBO, VTT2+ 630-680whp e85. This motor had 80k on it, tuned/modded since 40k. Piston crowns were good, just too much detonation. Ran well and logs looked normal (timing corrections, but nothing pointing to this cylinder). Compression test showed it was down (120psi vs. 160psi of rest). No visible oil burning. I had to remove the rings to get the ring land pieces out (you couldn't even tell they were broken). This is the same motor that set the then stock frame WR.
    18 replies | 1573 view(s)
  • Milan's Avatar
    Today, 11:14 PM
    I've managed 1.79 60' and our DA in Boise isn't that much lower than Bandimere....usually 4500-5000. You were power braking the launch right? 112 sounds about right because my car is pretty weak ass on pump gas and I have a 6466, so I figured yours would be pretty bad
    52 replies | 2006 view(s)
  • MM Performance's Avatar
    Today, 11:09 PM
    Oh one other thing was that cyl 6 rod was slightly bent. Cyl 6 had no problems and you would have never known it was slightly bent other than a little less power I guess. I missed it on initial tear down but then V8bait mentioned all the rods tony bent on many motors around the 650wtq mark and I went back to double check and sure enough cyl6 rod was bent a little. Seems the rods have a torque limit somewhere between 600-650wtq and I bet lots of motors out there with rods a little bent that you wouldn't know unless you tore down and inspected, maybe some of these single turbos running high boost but not quite hitting the 800+ power levels it seems they should be at for thier boost on the same turbos :think:
    18 replies | 1573 view(s)
  • The Ghost's Avatar
    Today, 11:02 PM
    Thanks for sharing! Please post a log of the misfire runs so we can have a look. Terry@BMS, for those of us with the JB4 controlling PI, is this a condition you can account for in the JB4?
    18 replies | 1573 view(s)
  • AdminTeam's Avatar
    Today, 10:38 PM
    Welcome to a real enthusiast forum RandallYew.
    0 replies | 3 view(s)
  • I6+TT=FTW's Avatar
    Today, 10:37 PM
    Do you think with left foot brake launching you just couldn't get the boost up enough? The best I've managed at Bandimere was a 1.9 60' , 13.05 @ 109 on my current set up (stock downpipes) last Sept.
    52 replies | 2006 view(s)
  • MM Performance's Avatar
    Today, 10:34 PM
    I see several threads pop up with engine failures but I like how this thread keeps them all together so I will add mine here. My failure was due to persistent misfire around 6000rpm. I was on the dyno tuning around 30psi making about 700whp/650wtq and everything looking good but couldn't get rid of a misfire at about 6250rpm. Doing back to back pulls and not allowing enough time for cool off in between was part of my issue. After a few misfires on cyl 5 messing up some runs I swapped in a new 5992 NGKs plug gapped to .016 on 2nd bank (just like all my other ones) and next run my cylinder 5 blew. Upon inspection the top of cyl 5 piston was melted and that with hyper lean detonation destroyed the ring land and rings. No bearings were damaged or any other damage other than a little aluminum deposit on cyl 5 from cyl melting and the chunks from the ring land it blew. I was able to drive the smoke chimney back home from the dyno and tear apart to swap in a new used engine and build a race engine with the core. Was running stage 3 lpfp and BMS PI with SS controller and flash only tuning. After looking at my last few logs with the misfire and the one from when it blew it's pretty clear that the misfire with the high boost created a situation where the cyl would cut the DI fuel due to misfire but high rpm and high boost had a lot of heat in cyl creating glow plug from injector and with PI still spraying for 500-1000rpm more it created a hyper lean condition that melted the piston and blew the ring land. This is the risk in two fuel systems not controlled by the same computer, something syvecs can solve. Planning to build Carrillo rods with CARR studs and Carrillo Pistons 84.5mm, arp mains studs and head studs, WPC treated bearings, closed deck (maybe). Thinking about lowering compression to 9.5, not sure yet. Surprisingly, neither Motiv or ABR offers block machining only to bore the block out and install closed deck, they are only looking to sell full build for 7-10k going from just piston upgrade to everything. I found a good engine machine shop in Houston to take care of all the block machining and we are discussing doing a closed deck insert but we will see where that goes, Maybe will be able to offer a new service for those that just want a closed deck block since others don't want to do that by itself at this time. you can see in the pics below the melted piston, blown ringland, and melted aluminum on the cyl wall.
    18 replies | 1573 view(s)
  • AdminTeam's Avatar
    Today, 10:29 PM
    Hey Alejandrin: :text-welcomewave:
    0 replies | 12 view(s)
  • AdminTeam's Avatar
    Today, 10:21 PM
    KieraJay3, we appreciate you taking the time to join.
    0 replies | 15 view(s)
  • froop's Avatar
    Today, 10:11 PM
    They actually don't sell them anymore from what I can see. They only have the engine mounts listed for sale and even those are out of stock. I think they just didn't sell enough to make another production run of them or something. PTF don't sell them anymore as they were a MOTIV designed product (I think), so when they split up, only MOTIV continued to sell them once PTF sold their remaining stock.
    25 replies | 1432 view(s)
  • Alpine's Avatar
    Today, 10:11 PM
    Well, numbers definitely were not what I was expecting. 1st gear launch best of the night was 13.4 @ 112 with a 2.4 60'. I'm bogging like crazy on the launch, seriously annoyed but whatever. Is what it is until nizpro releases their new software.
    52 replies | 2006 view(s)
  • MM Performance's Avatar
    Today, 09:43 PM
    MM Performance replied to a thread Replacing engine in N54
    I don't think it's a problem as Evan was putting a 335i engine in his 535. Sounds like oil pan for Xi and flywheel like you said and should be ok.
    5 replies | 256 view(s)
  • Sticky's Avatar
    133 replies | 704 view(s)
  • Sticky's Avatar
    2 replies | 143 view(s)
  • Tech's Avatar
    Today, 09:15 PM
    Tech replied to a thread Replacing engine in N54
    along with the oil pan needing swapped you'll need to change the oil pick up tube and plate. they have aluminum bolts as well. other than that the only other difference if the shape of the mounts and turbos.
    5 replies | 256 view(s)
  • The Ghost's Avatar
    Today, 09:04 PM
    The Ghost replied to a thread Replacing engine in N54
    I can't comment on this AWD part, but can confirm first hand the 135/335i motors are the same, even amongst transmissions. 2WD/4WD differs in oil pan and perhaps mounts from what I've read (never swapped them).
    5 replies | 256 view(s)
  • R.G.'s Avatar
    Today, 08:40 PM
    R.G. replied to a thread engine cover emblem ? in N54
    I recognize that engine bay That's a cheap ass $9 for the entire set amazon special Won't put that yellow in 5 min of sun garbage on the exterior so it found a home there There's an old school vender jbspeed or something similar that sells quality ones
    4 replies | 237 view(s)
  • terryd5150's Avatar
    Today, 08:34 PM
    Awesome.
    6 replies | 370 view(s)
  • Enfiftyfore's Avatar
    2 replies | 143 view(s)
  • Sticky's Avatar
    Today, 08:07 PM
    Speedriven continues to push the Mercedes M275 twin turbo V12 into territory nobody else has even approached. Last month they announced their standalone engine managment system for the platform. Well, now we have a video of it in action and some dyno results. Let's start with the dyno. The reason you are seeing gains here is not due to raised boost. Actually, they are running .9 BAR for just a baseline tune which is less than stock: More power even at less boost? More control? Impressive. Those are exactly the kind of advantages a standalone ECU provides and it shows: As you can see in the video it is plug and play. No wiring issues, all the gauges work, ABC works, no warning lights, no CEL, it just works like stock with more capability. They can alter the transmission parameters as well such as the shift points. The car drives just like stock as well without issue. Keep in mind this is just the beginning. As detailed in a previous article, the big guns that will really tax this new engine management system are coming. Much respect to Speedriven for continuing to push the M275 engine platform forward.
    3 replies | 106 view(s)
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