Close

Page 1 of 3 123 LastLast
Results 1 to 25 of 57

Thread: N54 Con Rods

  1. #1
    Join Date
    Dec 2010
    Location
    Moscow
    Posts
    85
    Rep Points
    219.0
    Mentioned
    8 Post(s)
    Rep Power
    3


    Yes Reputation No

    N54 Con Rods

    How many power can hold stock con rods?
    I will rebuild the motor and reduce CR to 9.2 (CP Pistons).
    Now i'm thinkig about Carrillo rods. Need or not need?

    BMW 335 FBO+RB 21psi.

    Thanks!

  2. #2
    Join Date
    Mar 2010
    Location
    Toronto, Canada
    Posts
    6,684
    Rep Points
    3,343.8
    Mentioned
    226 Post(s)
    Rep Power
    34


    Yes Reputation No
    no one has broken any yet at 20-21psi with RBs...when are you planning on building it?
    Click here to enlarge

  3. #3
    Join Date
    Dec 2010
    Location
    Moscow
    Posts
    85
    Rep Points
    219.0
    Mentioned
    8 Post(s)
    Rep Power
    3



    Yes Reputation No
    Only CR lowering! Car is fine!
    I understand that holds 21-22psi, but can will appear single turbo or fueling solution.
    Power will increase to 700hp and what then? Rebuild again?Click here to enlarge

    PS. I want go to Moscow Unlim500+!!!


    This is my competitor! M3 ESS!!! Fastest M3 in Moscow!
    Last edited by Tomaz; 01-13-2012 at 03:49 PM.

  4. #4
    Join Date
    Mar 2010
    Location
    Toronto, Canada
    Posts
    6,684
    Rep Points
    3,343.8
    Mentioned
    226 Post(s)
    Rep Power
    34


    Yes Reputation No
    Do you mean 700hp crank?

    RBs will most likely max out somewhere around 550whp provided fueling is taken care of (~670hp crank if you take the typical 18% drivetrain loss, which is pretty generous)...

    Terry has already pushed 543whp on nitrous without a failure, and hotrod182 has shoved some pretty serious nitrous down into the engine and ran 6.95sec 60-130mph on a mostly flat surface (so probably the car had around 520-550whp at the time)...

    Whatever you decide I am REALLY looking forward to an engine build..keep us updated when you go that route...9.2 compression should be very nice but with RBs maybe a 9.4 (Alpina compression) piston would be more ideal with RBs and max power, not sure...wonder what others think..

    ...and i'm definitely looking forward to you racing that m3...make sure you have race gas and a ton of meth though! Wish I could join that event Click here to enlarge
    Click here to enlarge

  5. #5
    Join Date
    May 2010
    Location
    South Jersey
    Posts
    860
    Rep Points
    1,537.7
    Mentioned
    26 Post(s)
    Rep Power
    16


    Yes Reputation No
    There is still a debate (or really just uncertainty) as to whether or not the rotating assembly of the N54 is forged. The stock rods MAY be able to hold that kind of power, but you have to ask yourself: "while I have the engine completely apart and I'm replacing the pistons anyway, why wouldn't I change the rods?"

  6. #6
    Join Date
    Mar 2010
    Location
    Toronto, Canada
    Posts
    6,684
    Rep Points
    3,343.8
    Mentioned
    226 Post(s)
    Rep Power
    34


    Yes Reputation No
    Click here to enlarge Originally Posted by Eleventeen Click here to enlarge
    There is still a debate (or really just uncertainty) as to whether or not the rotating assembly of the N54 is forged. The stock rods MAY be able to hold that kind of power, but you have to ask yourself: "while I have the engine completely apart and I'm replacing the pistons anyway, why wouldn't I change the rods?"
    Ya, Tomaz, if you'll be opening it up anyway, I'd probably get a nice set of titanium rods to go with the pistons too
    Click here to enlarge

  7. #7
    Join Date
    Feb 2010
    Location
    NJ
    Posts
    13,462
    Rep Points
    58.0
    Mentioned
    318 Post(s)
    Rep Power
    0


    Yes Reputation No
    Click here to enlarge Originally Posted by Tomaz Click here to enlarge
    Only CR lowering! Car is fine!
    I understand that holds 21-22psi, but can will appear single turbo or fueling solution.
    Power will increase to 700hp and what then? Rebuild again?Click here to enlarge

    PS. I want go to Moscow Unlim500+!!!

    http://www.youtube.com/watch?v=wwCde...layer_embedded
    This is my competitor! M3 ESS!!! Fastest M3 in Moscow!
    if you run RB's at 20 psi, the ESS M3 is not a problem Click here to enlarge

  8. #8
    Join Date
    Dec 2010
    Location
    Moscow
    Posts
    85
    Rep Points
    219.0
    Mentioned
    8 Post(s)
    Rep Power
    3



    2 out of 2 members liked this post. Yes Reputation No
    Yes I mean 700 crank.
    And what's about single turbo and 600whp+?
    If I participate in race I will use: Forged rims 9x17R+Hoosier's, all seats removal and install 1 Recaro, MS109+Meth.
    I want rebuild my trans with lvl10. They are don't answer to my letters.Click here to enlarge
    My 0-200km/h 11,95s (Slightly wet, +5 ambient temp, 19psi). More tire slips.
    M3 Ess 0-200km/h ~11,27s (On the video with Porsche).

  9. #9
    Join Date
    Mar 2010
    Location
    Toronto, Canada
    Posts
    6,684
    Rep Points
    3,343.8
    Mentioned
    226 Post(s)
    Rep Power
    34


    Yes Reputation No
    What meth setup are you running?

    Which hoosiers?
    Click here to enlarge

  10. #10
    Join Date
    Feb 2010
    Location
    NJ
    Posts
    13,462
    Rep Points
    58.0
    Mentioned
    318 Post(s)
    Rep Power
    0


    Yes Reputation No
    Click here to enlarge Originally Posted by Tomaz Click here to enlarge
    My 0-200km/h 11,95s (Slightly wet, +5 ambient temp, 19psi). More tire slips.
    is that with RB's or stock turbo's?

  11. #11
    Join Date
    Mar 2010
    Location
    Toronto, Canada
    Posts
    6,684
    Rep Points
    3,343.8
    Mentioned
    226 Post(s)
    Rep Power
    34


    Yes Reputation No
    with a 6AT on RBs and full boost you can drop that time down to 11.0-11.1 with good tires and that weight reduction
    Click here to enlarge

  12. #12
    Join Date
    Dec 2010
    Location
    Moscow
    Posts
    85
    Rep Points
    219.0
    Mentioned
    8 Post(s)
    Rep Power
    3



    Yes Reputation No
    Click here to enlarge Originally Posted by dzenno Click here to enlarge
    What meth setup are you running?
    CMGS 1.10 FSB Dual CM10+CM7. 250psi.

    Which hoosiers?
    275/40R18 Drag Radial.
    http://www.hoosier.ru/component/quic...og/drag-radial
    DD wheels 295/35R19 Advan AD08, rims Rays CE28N 8.5"&10,5".

  13. #13
    Join Date
    Dec 2010
    Location
    Moscow
    Posts
    85
    Rep Points
    219.0
    Mentioned
    8 Post(s)
    Rep Power
    3



    Yes Reputation No
    Click here to enlarge Originally Posted by dzenno Click here to enlarge
    with a 6AT on RBs and full boost you can drop that time down to 11.0-11.1 with good tires and that weight reduction
    I want order custom titanium exhaust for weight reduction. My car is M3 look and i need custom.
    Click here to enlarge
    Click here to enlarge

  14. #14
    Join Date
    Dec 2010
    Location
    Moscow
    Posts
    85
    Rep Points
    219.0
    Mentioned
    8 Post(s)
    Rep Power
    3



    Yes Reputation No
    Click here to enlarge Originally Posted by LostMarine Click here to enlarge
    is that with RB's or stock turbo's?
    LM this is with RB and street tires, slipping up to 140km/h. Run from 2nd gear, half throttle before shift to 3rd gear.
    All runs with 93oct+meth 70/30 mix.

  15. #15
    Join Date
    Jan 2010
    Location
    SoCal
    Posts
    119,483
    Rep Points
    32,156.3
    Mentioned
    2110 Post(s)
    Rep Power
    322


    Yes Reputation No
    Click here to enlarge Originally Posted by Tomaz Click here to enlarge
    How many power can hold stock con rods?
    I will rebuild the motor and reduce CR to 9.2 (CP Pistons).
    Now i'm thinkig about Carrillo rods. Need or not need?

    BMW 335 FBO+RB 21psi.

    Thanks!
    If you are building the motor why not do the rods? Might as well.

  16. #16
    Join Date
    Apr 2010
    Location
    espaņa
    Posts
    752
    Rep Points
    804.0
    Mentioned
    14 Post(s)
    Rep Power
    9


    2 out of 2 members liked this post. Yes Reputation No
    I was about to sell my car
    now decided to lighten crankshaft, cylinder headCasile entire intake and exhaust and put someforged pistons, my coach told me no need to change the cranks are strong enough

    and wait for someone to get well the n54 tune for greater fuel flow, this is our roof ...

    their turbos and my turbos are capable Desaroyo27-28 psi, but no one is able to manage the ecu siemens msd80

  17. #17
    Join Date
    Mar 2010
    Location
    South Africa
    Posts
    1,320
    Rep Points
    1,955.5
    Mentioned
    37 Post(s)
    Rep Power
    0


    Yes Reputation No
    I have run the car on full load with 550whp minimum for stretches longer than 1km and the motor seems to be ok with it. Gearbox will be a must though. Lowering the compression with the RB's is just going to get you to loose power at this stage and I do not even think that at 20psi+ you will have a bottom end problem assuming the fueling is sorted.

  18. #18
    Join Date
    Mar 2010
    Location
    Stockholm
    Posts
    1,528
    Rep Points
    1,177.6
    Mentioned
    61 Post(s)
    Rep Power
    12


    Yes Reputation No
    yeah plus the Tmap sensor as a limit at 21.5 or is it slightly higher than that?
    07 335i AT - MOTIV 750 - MHD BMS E85 - BMS PI - JB4G5 - Okada Coils - NGK 5992 Plugs - Helix IC - Stett CP - Custom midpipes with 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - LUX H8 - Level 10 AT upgrade
    Click here to enlarge

  19. #19
    Join Date
    Mar 2010
    Location
    Toronto, Canada
    Posts
    6,684
    Rep Points
    3,343.8
    Mentioned
    226 Post(s)
    Rep Power
    34


    Yes Reputation No
    Click here to enlarge Originally Posted by enrita Click here to enlarge
    yeah plus the Tmap sensor as a limit at 21.5 or is it slightly higher than that?
    tmap has been said to be a 2.5bar, take away 1bar at sea level, and it can measure 1.5bar "boost" (added pressure over sea level)...1.5 bar = 21.756psi max...

    i wonder if anyone has confirmed that by testing it...
    Click here to enlarge

  20. #20
    Join Date
    Mar 2010
    Posts
    1,927
    Rep Points
    1,376.8
    Mentioned
    13 Post(s)
    Rep Power
    14


    Yes Reputation No
    Why lower c.r.??
    You will loose power.

  21. #21
    Join Date
    Jan 2010
    Location
    SoCal
    Posts
    119,483
    Rep Points
    32,156.3
    Mentioned
    2110 Post(s)
    Rep Power
    322


    Yes Reputation No
    Click here to enlarge Originally Posted by 654 Click here to enlarge
    Why lower c.r.??
    You will loose power.
    People are thinking of doing it to run more boost likely but that isn't even an option right now.

  22. #22
    Join Date
    Mar 2010
    Posts
    1,927
    Rep Points
    1,376.8
    Mentioned
    13 Post(s)
    Rep Power
    14


    Yes Reputation No
    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    People are thinking of doing it to run more boost likely but that isn't even an option right now.
    I agree, this would seem to be a mistake.
    Static C.R. is only one parameter in the dynamic C.R. that defines the limit for detonation. There are at least two better ways to fight the detonation. One is to limit the dynamic C.R. not by the static C.R. but adjusting inlet valve closing ABDC. Adding overlap is beneficial in decreasing dynamic C.R. and thus enabling more boost. Twins or twin scroll/divided inlet design turbo will not suffer from adding the overlap slightly. Adjusting cam timings cannot be done just by a piggy though. The other way to fight the detonation, is to run meth. So, I don't see a good reason to lower the static c.r. Especially, without a well thought out solution to swap to 3bar MAP sensor with engine management plan that plays along with it (currently non-existent AFAIK).

  23. #23
    Join Date
    Mar 2010
    Location
    Toronto, Canada
    Posts
    6,684
    Rep Points
    3,343.8
    Mentioned
    226 Post(s)
    Rep Power
    34


    Yes Reputation No
    FWIW, I talked to Rob@Cobb yesterday about a 3bar map sensor and he saidhes already got the tables for the MAP scaler and offset so tuning with one won't be an issue...I'm thinking a tmap from an N63/S63 (they run 1.9-2bar stock) might be plug and play in terms of fitment or as Rob says tge one off of Mini might also work..
    Click here to enlarge

  24. #24
    Join Date
    May 2010
    Location
    South Jersey
    Posts
    860
    Rep Points
    1,537.7
    Mentioned
    26 Post(s)
    Rep Power
    16


    Yes Reputation No
    Once someone does hit the MAP limit, I think a MAP clamp would be a good solution for a few more psi (not 35psi, but a few more). If you're not familiar with a MAP clamp, it's basically a potentiometer that ties into the MAP wiring which can be set to limit the amount of voltage the ECU sees. Almost all MAP sensors work on a 0-5V range (even the 3 bar sensors). The MAP clamp does not rescale the sensor, it just limits the output. On most cars, you would need to retune the ECU to run rich up top since it cannot see the additional boost past the clamp limit. However, our cars should be able to keep the correct amount of fuel flowing since the widebands will notice any leaning, and the DME can still adjust - regardless of boost value.

    Longterm, a 3 bar will be the way to go. Like I mentioned, it also runs a 0-5V range, so 5V=3bar where as on our stock MAPs, 5V=2.5bar.

    Since piggybacks intercept signals, modify, and feed those "lies" to the DME anyway, I would assume tuning one for a 3bar sensor would be a walk in the park for Terry, Shiv, or whoever... Cobb should also have no problem handling this. I think it's just a matter of necessity at this point.

  25. #25
    Join Date
    May 2010
    Location
    South Jersey
    Posts
    860
    Rep Points
    1,537.7
    Mentioned
    26 Post(s)
    Rep Power
    16


    Yes Reputation No
    Click here to enlarge Originally Posted by dzenno Click here to enlarge
    FWIW, I talked to Rob@Cobb yesterday about a 3bar map sensor and he saidhes already got the tables for the MAP scaler and offset so tuning with one won't be an issue...I'm thinking a tmap from an N63/S63 (they run 1.9-2bar stock) might be plug and play in terms of fitment or as Rob says tge one off of Mini might also work..
    On most other platforms, the GM 3bar is as obvious as Budweiser to a redneck. They have a 3 wire connection just like every other MAP I've seen, so wiring them in is a piece of cake. They usually come with a new connector to add to your factory wiring for a plug in solution. HOWEVER, a BMW plug & play option that was a direct fit to our chargepipes would be totally $#@!ing rad ...yeah, I just said that.

Page 1 of 3 123 LastLast

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
  •