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  1. #26
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    Click here to enlarge Originally Posted by oddjob2021 Click here to enlarge
    so long? stock manual is 3.08, stock auto is 3.46, he got the 3.85 from an M right? or was it the 3.15 dct diff? you didnt read the thread about how he changed to the m-diff and liked it at first (probably because of the positive traction) but then felt the ratio was not right for the engine.. so props to him for trying a new ratio Click here to enlarge you know for the n54, it makes so much torque so low, that you can really just start in 2nd, in that case, even lower than 3.08 could possibly yield better results, because then 1st maybe useable at upp'd turbo levels, but a 2.xx ratio seems sooo low LOL just like a 4.15 or whatever sounds very high for a street car.
    I forgot about the whole M diff thing.

    3.85 to 3.15 is a big jump but I didn't realize the stock 335 ratio, I was going from 3.85. Ya, sounds like the 3.85 was just way too damn short.
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  2. #27
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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    I forgot about the whole M diff thing.

    3.85 to 3.15 is a big jump but I didn't realize the stock 335 ratio, I was going from 3.85. Ya, sounds like the 3.85 was just way too damn short.
    Tooo too short, I would slip and slide in second on a prepared track. I do feel the 3.15 is slightly long but wont be once the RB's are in. I feel that the 3.15 is perfect even for the guys with stock turbos that have to change further. I am sure there will be negative affects in fifth as it goes to crazy speeds and the 3.85 excelled in fourth and fifth. Time will show, worse case scenario if I made a error I will just change the ratios again. This time round I swopped the diff with someone that is going for a 4.11 in a S65 Manual.

  3. #28
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    im running Jb3, dci,perf exhaust on a AT... Best shift points for an auto 67/6800? Im trying to go for best ET

  4. #29
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    Click here to enlarge Originally Posted by goodfella69 Click here to enlarge
    im running Jb3, dci,perf exhaust on a AT... Best shift points for an auto 67/6800? Im trying to go for best ET
    Most likely yes, but like it was stated look at your dyno graph.

    For the autos just let it shift on its own. Use a couple different techniques if you like and let us know how it goes Click here to enlarge
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  5. #30
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    if your AT def do not let it shift on its own. your choices are put it in DS, as its faster than D, ot put into M and shift on your own, but try both @ 62 and 68krpms. also

    anyone else tried starting in M2 instead of M1?

  6. #31
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    Click here to enlarge Originally Posted by LostMarine Click here to enlarge
    if your AT def do not let it shift on its own. your choices are put it in DS, as its faster than D, ot put into M and shift on your own, but try both @ 62 and 68krpms. also

    anyone else tried starting in M2 instead of M1?
    Don't a few of the guys launch in second instead of first? DS is shfiting on its own anyway, yes, choose the fastest shift speed though obviously.

    How is the gearing compared to the manual?
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  7. #32
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    1 out of 1 members liked this post. Reputation: Yes | No
    you're absolutely right, some people start in second and even drag that way. namely, hotrod182. i believe these are the numbers you're looking for sticky:

    Manual gear ratios – I/II
    4.11/2.32 :1
    Manual gear ratios – III/IV
    1.54/1.18 :1
    Manual gear ratios – V/VI/R
    1.00/0.87/3.70 :1
    Final drive ratio
    3.08 :1
    Automatic gear ratios – I/II
    4.17/2.34 :1
    Automatic gear ratios – III/IV
    1.52/1.14 :1
    Automatic gear ratios – V/VI/VII/R
    0.87/0.69/—/3.40 :1
    Final drive ratio
    3.46 :1
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    2007 335i Coupe
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  8. #33
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    That is correct, I would love to get that final drive ratio in my 6mt Click here to enlarge

  9. #34
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    Click here to enlarge Originally Posted by Blaizon Click here to enlarge
    That is correct, I would love to get that final drive ratio in my 6mt Click here to enlarge
    your choice, but so you know, going higher in our 6mt has proven to be a bad choice, it just isnt right for the engine. search the forum, george smooth posted a thread about a diff swap to a higher ratio, but his isnt the only case.
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  10. #35
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    Click here to enlarge Originally Posted by oddjob2021 Click here to enlarge
    you're absolutely right, some people start in second and even drag that way. namely, hotrod182. i believe these are the numbers you're looking for sticky:

    Manual gear ratios – I/II
    4.11/2.32 :1
    Manual gear ratios – III/IV
    1.54/1.18 :1
    Manual gear ratios – V/VI/R
    1.00/0.87/3.70 :1
    Final drive ratio
    3.08 :1
    Automatic gear ratios – I/II
    4.17/2.34 :1
    Automatic gear ratios – III/IV
    1.52/1.14 :1
    Automatic gear ratios – V/VI/VII/R
    0.87/0.69/—/3.40 :1
    Final drive ratio
    3.46 :1
    Thank you, honestly, when tuned, I would say the manual has the gearing advantage but obviously it is harder to utilize without being able to brake-torque or consistently shift. I need to find the info on max mph per gear for each to have a better idea.
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  11. #36
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    Click here to enlarge Originally Posted by oddjob2021 Click here to enlarge
    your choice, but so you know, going higher in our 6mt has proven to be a bad choice, it just isnt right for the engine. search the forum, george smooth posted a thread about a diff swap to a higher ratio, but his isnt the only case.
    I would agree with this based on how it looks on paper.
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  12. #37
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    I've had cars with similiar power bands *mustang world* and going up in ratio was always good for a few tenths/mph. I think GS went really aggressive & is backing it down. I think with a 3.27 - 3.46 fdr, a 6mt would love it. Top end will suffer some, but for overall quicker acceleration, I'd take it. Also with upgraded turbos coming out now, I beleive the cars would really benefit from it.

  13. #38
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    Click here to enlarge Originally Posted by Blaizon Click here to enlarge
    I've had cars with similiar power bands *mustang world* and going up in ratio was always good for a few tenths/mph. I think GS went really aggressive & is backing it down, I think with a 3.27 - 3.46 fdr, a 6mt would love it. Top end will suffer some, but for overall quicker acceleration, I'd take it. Also with upgraded turbos coming out now, I beleive the cars would really benefit from it.
    Yes, shorter gearing often helps in the Mustang world because it makes it so you are closer to redline when crosses the traps but does not add an extra shift.

    I went shorter and it cost me top end, adding an extra shift. I crossed the traps in 5th.
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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    Yes, shorter gearing often helps in the Mustang world because it makes it so you are closer to redline when crosses the traps but does not add an extra shift.

    I went shorter and it cost me top end, adding an extra shift. I crossed the traps in 5th.
    Ack shift to 5th!

  15. #40
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    Click here to enlarge Originally Posted by Blaizon Click here to enlarge
    Ack shift to 5th!
    Well, with 7 gears things were short as is.

    But, in my case the shorter gears hurt, and they hurt bad. Ran a 1.78 60' but had no top end.
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  16. #41
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    I launch in first in manual mode and let the tranny shift on its own to 2nd then use my paddles to shift at 6k rpms for third and forth. I may be shifting a touch later, 6200ish, with the 15ohm board now. I am racing next weekend and will post results. Meth is in and I will be shooting for 11.5 @ 125, lets hope the DAs are solid.

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    GL with that!

  18. #43
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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    Thank you, honestly, when tuned, I would say the manual has the gearing advantage but obviously it is harder to utilize without being able to brake-torque or consistently shift. I need to find the info on max mph per gear for each to have a better idea.
    well i dont know the exact ones for auto, but for the manual, 1st @ 7k is 40, 2nd is 70, 3rd is 110, 4th is 140, 5th is 168 i believe and 6th is 199mph.
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    Click here to enlarge Originally Posted by LostMarine Click here to enlarge
    GL with that!
    125 mph is a bit ambitious, prolly 123 is doable but I am confident that the car has an 11.5 in it Click here to enlarge
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    So whats the consensus for a MT car? I have been shifting at 6K?

    Mike

  21. #46
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    Click here to enlarge Originally Posted by mike@n54tuning.com Click here to enlarge
    So whats the consensus for a MT car? I have been shifting at 6K?

    Mike
    Consensus is you gotta trade it in for a auto hehe. Zero drop of G's on the Vbox. You actually battle to see where the shift occurred. I would say the shift on the manual should be the same as the auto as there power graphs do not alter. I have noticed that manuals have a noticeable advantage in fifth as it has the straight drive gear which is slightly shorter than the auto's fifth.

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