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Thread: Try to build turbo e36 m50b30 with bad fuel 87 octane.

  1. #26
    Join Date
    Jul 2009
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    Frederick, MD
    Posts
    493
    My Cars
    '87 e30, '02 e39 Dinan
    Quote Originally Posted by someguy2800 View Post
    That is not true at all. All fuels have an auto-ignition temperature. Once you reach a certain point with boost, compression, and intake temperatures there is no amount of timing retard that will keep it from auto-igniting and detonating its brains out. Its not as simple as just taking timing out.
    Im researching but i think the SIT (self-ignition Temperature) / Auto-ignition of each octane are similar.
    Capital Driving Club Car # 102
    How to turbo your car:
    Step one. Install ecu and learn to tune and or have it tuned.
    Step two. Install injectors and retune.
    Step three. Install turbo parts and bits. get it running with out leaks. DO NOT DRIVE IT. Idling should be ok
    Step four. Retune car
    Step five enjoy

  2. #27
    Join Date
    Jul 2009
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    Frederick, MD
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    '87 e30, '02 e39 Dinan
    Quote Originally Posted by tptrsn View Post
    Related to that, another interesting thing I recently learned is that E85 actually prefers LESS timing than gasoline in conditions where the gasoline would not be knock limited. I.e. if the conditions allow for tuning each fuel to MBT, then gasoline wants more advance than E85 does. Obviously most of the time pump gasoline will have to have less timing than either fuel wants for MBT because it will be knock limited.

    But for sure it absolutely is not as simple as just taking timing out.
    Heres Bens explanation of the e85 timing.

    https://www.youtube.com/watch?v=RTzW4V3t7JY

    iirc E85 under low load low rpm requires less timing but cant remember why.
    Capital Driving Club Car # 102
    How to turbo your car:
    Step one. Install ecu and learn to tune and or have it tuned.
    Step two. Install injectors and retune.
    Step three. Install turbo parts and bits. get it running with out leaks. DO NOT DRIVE IT. Idling should be ok
    Step four. Retune car
    Step five enjoy

  3. #28
    Join Date
    Oct 2004
    Location
    DeWitt, Michigan
    Posts
    5,589
    My Cars
    '97 540i/6, '97 328i
    Yes, that is the video that sparked some discussion on LS1Tech, and it was confirmed by a few people that it really does carry into higher load higher RPM ranges as well.

    But you definitely can't just hope to run low enough timing with 87 octane gasoline as boost rises. If you find some solid evidence that says you can, I'm sure many of us would be very interested to see it.

  4. #29
    Join Date
    Jul 2009
    Location
    Frederick, MD
    Posts
    493
    My Cars
    '87 e30, '02 e39 Dinan
    Still searching, even my old college text books. Gut feeling is the difference between 87 and 91 is so small that he will be able to hit 400whp. If you can make 500whp on a stock block.
    Capital Driving Club Car # 102
    How to turbo your car:
    Step one. Install ecu and learn to tune and or have it tuned.
    Step two. Install injectors and retune.
    Step three. Install turbo parts and bits. get it running with out leaks. DO NOT DRIVE IT. Idling should be ok
    Step four. Retune car
    Step five enjoy

  5. #30
    Join Date
    Feb 2016
    Location
    Ashgabat
    Posts
    731
    My Cars
    BMW e39 540i Supercharge
    I am quite surprised that there is small difference between 87 & 91 octane. Actually i knew that high octane has low flame speed but i did not know that the resistance of self igniting is close eachother. Damn, sorry but i am confused. May be i did not catch it?
    e39 540i 6speed Supercharged, M-technicsa, Alpina forger wheels, M62 air intake, No cats, AEM fuel pump 320lh, Water methanol injection (only water injecting), 330cc injectors, 3.15LSD, Afr, Egt, Boost gauge, M62 Air intake. TTFS tuning coming SOON for 9 psi 450RWHP.

  6. #31
    Join Date
    Oct 2016
    Location
    Croatia
    Posts
    17
    My Cars
    1991 BMW 325i
    Quote Originally Posted by dovlet View Post
    What that gives me? Is that decreasing my CR?

    - - - Updated - - -


    What will be mine cr then?
    8.81:1 according to this drift build ( https://www.driftworks.com/forum/thr...-turbo.251583/ )

    Still not sure if 318is pistons are 85mm...as boring out would be required

    wikipedia says 84mm for m42 and 85mm for m44
    Last edited by Vug1; 01-07-2018 at 05:03 PM.

  7. #32
    Join Date
    Feb 2016
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    Ashgabat
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    BMW e39 540i Supercharge
    Ok Gents, tqvm for all your helps. So, now i decide to go with s366 A/R 0.91. As you know that is twinscroll. My question is may i use it with single scroll manifold? If yes it is ok. If no then why?
    e39 540i 6speed Supercharged, M-technicsa, Alpina forger wheels, M62 air intake, No cats, AEM fuel pump 320lh, Water methanol injection (only water injecting), 330cc injectors, 3.15LSD, Afr, Egt, Boost gauge, M62 Air intake. TTFS tuning coming SOON for 9 psi 450RWHP.

  8. #33
    Join Date
    Apr 2006
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    Minnesota eh?
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    86 325es
    Yes it will work but if your using it on a single scroll manifold you should just get the .88 open housing. They are the same cost.


    86 325es, 2.8L NV m50, S366, Megasquirt 2, e85, solid rear axle, 4 link, spool, T56 Magnum trans, 28x10.5w slicks, zip ties
    Best = 9.43 @ 149.15 mph, 1.30 60 foot 28 psi boost

  9. #34
    Join Date
    Feb 2016
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    Ashgabat
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    BMW e39 540i Supercharge
    Quote Originally Posted by someguy2800 View Post
    Yes it will work but if your using it on a single scroll manifold you should just get the .88 open housing. They are the same cost.
    Ok, catched.
    e39 540i 6speed Supercharged, M-technicsa, Alpina forger wheels, M62 air intake, No cats, AEM fuel pump 320lh, Water methanol injection (only water injecting), 330cc injectors, 3.15LSD, Afr, Egt, Boost gauge, M62 Air intake. TTFS tuning coming SOON for 9 psi 450RWHP.

  10. #35
    Join Date
    Feb 2016
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    Ashgabat
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    BMW e39 540i Supercharge
    I am looking for some used kits and notted that most of them has no Turbo numbers, just T3/T4 name. What does it mean? And what is the average price for used kit from Technics Tuning or other kits for 450WHP?
    e39 540i 6speed Supercharged, M-technicsa, Alpina forger wheels, M62 air intake, No cats, AEM fuel pump 320lh, Water methanol injection (only water injecting), 330cc injectors, 3.15LSD, Afr, Egt, Boost gauge, M62 Air intake. TTFS tuning coming SOON for 9 psi 450RWHP.

  11. #36
    Join Date
    Feb 2016
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    Ashgabat
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    BMW e39 540i Supercharge
    Just few photos of my e39 540i 6speed SC.
    20180112_172210.jpg20180112_172254.jpg
    To day was run it and drive on ruf of garage today. I really miss it.
    e39 540i 6speed Supercharged, M-technicsa, Alpina forger wheels, M62 air intake, No cats, AEM fuel pump 320lh, Water methanol injection (only water injecting), 330cc injectors, 3.15LSD, Afr, Egt, Boost gauge, M62 Air intake. TTFS tuning coming SOON for 9 psi 450RWHP.

  12. #37
    Join Date
    Feb 2016
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    Ashgabat
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    BMW e39 540i Supercharge
    Mine e36 m50b30 engine with m60b30 throttle.
    20180112_172124.jpg
    Also, found supplier of aluminium intake with throttle as in picture below. It is about 550USD with delivery. I think for group buy they can do discount. It is china maden.
    20180112_083300.jpg
    e39 540i 6speed Supercharged, M-technicsa, Alpina forger wheels, M62 air intake, No cats, AEM fuel pump 320lh, Water methanol injection (only water injecting), 330cc injectors, 3.15LSD, Afr, Egt, Boost gauge, M62 Air intake. TTFS tuning coming SOON for 9 psi 450RWHP.

  13. #38
    Join Date
    Feb 2016
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    Ashgabat
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    BMW e39 540i Supercharge
    Gents, i found m50 block with crank 75mm. What will be my cr with m50 non tu pistons? Rods 140/135&130mm.
    Tqvm.
    e39 540i 6speed Supercharged, M-technicsa, Alpina forger wheels, M62 air intake, No cats, AEM fuel pump 320lh, Water methanol injection (only water injecting), 330cc injectors, 3.15LSD, Afr, Egt, Boost gauge, M62 Air intake. TTFS tuning coming SOON for 9 psi 450RWHP.

  14. #39
    Join Date
    Feb 2016
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    Ashgabat
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    731
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    BMW e39 540i Supercharge
    Noob question, i have available aem e85 fuel pump. May i use it for benzine?
    e39 540i 6speed Supercharged, M-technicsa, Alpina forger wheels, M62 air intake, No cats, AEM fuel pump 320lh, Water methanol injection (only water injecting), 330cc injectors, 3.15LSD, Afr, Egt, Boost gauge, M62 Air intake. TTFS tuning coming SOON for 9 psi 450RWHP.

  15. #40
    Join Date
    Oct 2015
    Location
    Brazil
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    6
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    325 e36 1995
    Quote Originally Posted by someguy2800 View Post
    M54 has a thinner head gasket but the deck height of the block is also taller so it works out to be the same.

    Hello
    I'm mounting a stroker m50b30 (m54 internals + m50b25tu block and head)
    I'm worried my CR will be too low. Are you sure about this block height issue? My cr will stay in 10.2 same?

  16. #41
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    Apr 2006
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    Minnesota eh?
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    86 325es
    Quote Originally Posted by ozzyybr View Post
    Hello
    I'm mounting a stroker m50b30 (m54 internals + m50b25tu block and head)
    I'm worried my CR will be too low. Are you sure about this block height issue? My cr will stay in 10.2 same?
    It will be the same as a stock m54. The block on the m54 is taller but the headgasket is thinner by the same amount so it works out to be the same.


    86 325es, 2.8L NV m50, S366, Megasquirt 2, e85, solid rear axle, 4 link, spool, T56 Magnum trans, 28x10.5w slicks, zip ties
    Best = 9.43 @ 149.15 mph, 1.30 60 foot 28 psi boost

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