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Thread: Smg2 4.10 diff

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    Smg2 4.10 diff

    Hi,
    is it possible to make the smg 2 shifting faster?
    My car has about 550whp ( supercharged ) and I'm planning to change the finalgear to 4.10. The engine revs up to 9.000 rpm. Is it possible to let the launch control start in 2nd gear ? Is 4.10 okay or to short for track use?

    Best regards
    Rafael

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    You are revving to 9k with the supercharger? Nice!

    I don't know of anyone who can program the launch control to start in second.

    4.10 is fine IMO with the raised redline. If you are already having traction issues (not saying you are) I wouldn't go shorter.

    As far as shifting faster I don't think you have any other options there either.

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    I wouldn't run 4.10's in a Sc'd car, and like Sticky said I don't think there has been anyone who programmed the smg to start in 2nd. I suggest running 3.91 gear
    Click here to enlargeClick here to enlarge

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    Do you think despite I'm reving up to 9.000 rpm
    the 4.10 gearing is to short !

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    Click here to enlarge Originally Posted by M3Reloaded Click here to enlarge
    Do you think despite I'm reving up to 9.000 rpm
    the 4.10 gearing is to short !
    I wouldn't trust stock rod bearings for that task either.
    Click here to enlargeClick here to enlarge

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    I use the vac rod bearings
    Click here to enlarge

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    Click here to enlarge Originally Posted by M3Reloaded Click here to enlarge
    Do you think despite I'm reving up to 9.000 rpm
    the 4.10 gearing is to short !
    I think 4.10 is too short once supercharged at your power level. The extra rpm will make up for the MPH deficit of having to shift earlier with the shorter gearing but I don't think you need the 4.10's. I'd concentrate more on getting more power if that is what you want. I plan on going to longer gearing personally.

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    I would love to have a long 1st gear and use it as a driving gear.
    Click here to enlarge

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    Click here to enlarge Originally Posted by M3Reloaded Click here to enlarge
    I would love to have a long 1st gear and use it as a driving gear.
    Then you won't want 4.10.

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    There are several POINTS to be addressed:

    1- Stock S54 cams wont make power passed 8000 rpm. You will rev but wont make more power after 8000 rpm.

    To rev S54 over 8000 rpm in F/I'ed version following items must be replaced:
    camshafts
    valve springs
    valves
    retainers

    Unless you replace these parts no need to push over 8k rpm.

    2- Even if you get the cylinder head modified as I described, bottom end will suffer. Rods, pistons must be modified to rev
    past 8k.

    3- Will your supercharger flow enough air, in other words will it have good adiabatic efficiency after 8000 rpm on a 3200 cc engine?

    As a conclusion, many factors should be taken into consideration if you want to rev 8000 +.

    I rev 9200 rpm on my twin turbo S54 B35s and S50 B32sClick here to enlarge
    E36 M3 Euro TT 60-130 mph 4.49 s
    E46 M3 3.6L TT 60-130 mph 4.22 s
    All Wheel drive M3 Twin Turbo
    997 TT



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    Click here to enlarge Originally Posted by Twinturbom3 Click here to enlarge
    There are several POINTS to be addressed:

    1- Stock S54 cams wont make power passed 8000 rpm. You will rev but wont make more power after 8000 rpm.

    To rev S54 over 8000 rpm in F/I'ed version following items must be replaced:
    camshafts
    valve springs
    valves
    retainers

    Unless you replace these parts no need to push over 8k rpm.

    2- Even if you get the cylinder head modified as I described, bottom end will suffer. Rods, pistons must be modified to rev
    past 8k.

    3- Will your supercharger flow enough air, in other words will it have good adiabatic efficiency after 8000 rpm on a 3200 cc engine?

    As a conclusion, many factors should be taken into consideration if you want to rev 8000 +.

    I rev 9200 rpm on my twin turbo S54 B35s and S50 B32sClick here to enlarge
    You rev past 9200, and do not state how long these engines last. Chicken farmer gonna farm.
    Click here to enlargeClick here to enlarge

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    Yes Reputation No
    Click here to enlarge Originally Posted by Twinturbom3 Click here to enlarge
    There are several POINTS to be addressed:

    1- Stock S54 cams wont make power passed 8000 rpm. You will rev but wont make more power after 8000 rpm.

    To rev S54 over 8000 rpm in F/I'ed version following items must be replaced:
    camshafts
    valve springs
    valves
    retainers

    Unless you replace these parts no need to push over 8k rpm.

    2- Even if you get the cylinder head modified as I described, bottom end will suffer. Rods, pistons must be modified to rev
    past 8k.

    3- Will your supercharger flow enough air, in other words will it have good adiabatic efficiency after 8000 rpm on a 3200 cc engine?

    As a conclusion, many factors should be taken into consideration if you want to rev 8000 +.

    I rev 9200 rpm on my twin turbo S54 B35s and S50 B32sClick here to enlarge


    All this things have been done to my engine :-)
    Click here to enlarge

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    Click here to enlarge Originally Posted by GG///M3 Click here to enlarge
    You rev past 9200, and do not state how long these engines last. Chicken farmer gonna farm.


    I did not state "past 9200", I revved till 9200 rpm and these engine last for a good time.

    In order to build such a S54 to hold the torque/rpm lots of Money, effort, R&D is spent.
    Just an example, the head studs and main studs cost 2500 USD and it takes 14 weeks to get them custom manufactured.
    Just the little studs....

    From farmer.
    E36 M3 Euro TT 60-130 mph 4.49 s
    E46 M3 3.6L TT 60-130 mph 4.22 s
    All Wheel drive M3 Twin Turbo
    997 TT



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    M3reloadeed, there is no valvetrain on the market that revs a F/I'ed S54 past 8200 rpm.

    S54 valvetrain needs to be re-designed to prevent valve shim issues.

    So far I have not seen any other kit except my own valvetrain partsClick here to enlarge
    E36 M3 Euro TT 60-130 mph 4.49 s
    E46 M3 3.6L TT 60-130 mph 4.22 s
    All Wheel drive M3 Twin Turbo
    997 TT



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    Click here to enlarge Originally Posted by GG///M3 Click here to enlarge
    You rev past 9200, and do not state how long these engines last. Chicken farmer gonna farm.
    There's no point starting crap.

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    Click here to enlarge Originally Posted by Twinturbom3 Click here to enlarge
    M3reloadeed, there is no valvetrain on the market that revs a F/I'ed S54 past 8200 rpm.

    S54 valvetrain needs to be re-designed to prevent valve shim issues.

    So far I have not seen any other kit except my own valvetrain partsClick here to enlarge
    I'm pretty sure VAC has off the shelf parts for this. I think they even have a destroked S54 good for 10k or something like that. @Mike@VAC

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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    I'm pretty sure VAC has off the shelf parts for this. I think they even have a destroked S54 good for 10k or something like that. @Mike@VAC
    Yea, we def have cars with our valve train kit revving way past 8200 RPM.

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    Click here to enlarge Originally Posted by Mike@VAC Click here to enlarge
    Yea, we def have cars with our valve train kit revving way past 8200 RPM.

    Mike I like your products, been using some of them on my M3s. But the S54 F/I valvetrain is something that I designed and and it is not sold anywhere else Click here to enlarge

    Mike, I am looking for a S62 to get shipped to you for sleeving.
    E36 M3 Euro TT 60-130 mph 4.49 s
    E46 M3 3.6L TT 60-130 mph 4.22 s
    All Wheel drive M3 Twin Turbo
    997 TT



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    Click here to enlarge Originally Posted by Twinturbom3 Click here to enlarge
    Mike I like your products, been using some of them on my M3s. But the S54 F/I valvetrain is something that I designed and and it is not sold anywhere else Click here to enlarge

    Mike, I am looking for a S62 to get shipped to you for sleeving.
    Incorrect
    Click here to enlargeClick here to enlarge

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    Click here to enlarge Originally Posted by Twinturbom3 Click here to enlarge
    ut the S54 F/I valvetrain is something that I designed and and it is not sold anywhere else
    There's plenty of other valvetrain options man...

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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    There's plenty of other valvetrain options man...
    You guys know a lot .....
    E36 M3 Euro TT 60-130 mph 4.49 s
    E46 M3 3.6L TT 60-130 mph 4.22 s
    All Wheel drive M3 Twin Turbo
    997 TT



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    Click here to enlarge Originally Posted by Twinturbom3 Click here to enlarge
    You guys know a lot .....
    Come on man don't act like you are the only one who can address the valvetrain.

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    ....Click here to enlarge
    Click here to enlarge

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    0 out of 1 members liked this post. Yes Reputation No
    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    Come on man don't act like you are the only one who can address the valvetrain.

    Sticky, you should not comment on a system / valvetrain on which you have no experience.

    If I say there is no copy of my S54 valvetrain on the market, I know what I am talking. I suffered S54 valvetrain related issues under high boost and passed 8100 rpm. Solved by 2009 by designing and producing my own valvetrain parts.
    E36 M3 Euro TT 60-130 mph 4.49 s
    E46 M3 3.6L TT 60-130 mph 4.22 s
    All Wheel drive M3 Twin Turbo
    997 TT



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    Click here to enlarge Originally Posted by Twinturbom3 Click here to enlarge
    Sticky, you should not comment on a system / valvetrain on which you have no experience.

    If I say there is no copy of my S54 valvetrain on the market, I know what I am talking. I suffered S54 valvetrain related issues under high boost and passed 8100 rpm. Solved by 2009 by designing and producing my own valvetrain parts.
    Please do not start selling those parts. You have the most horrid track record of robbing peoples monies over the years. Keep those parts on the farm...
    Click here to enlargeClick here to enlarge

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