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  1. #26
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    This is a backwards engine combination, where you gain torque, but HP is bound to be reduced.

    Why?

    The cylinder head is going to choke.

    It's not about total flow, as much as it is about port velocity, and in this case there is only so big you can make the valves/ports before they are shrouded by the cylinder wall.

    This is EXACTLY the problems faced by Pro Mod cars, specifically the nitrous guys, where they want more displacement, but the bore spacing only allows so much displacement. So they ended up going with longer and longer strokes,with higher deck heights....and of course you saw engine RPMs at peak power dropping as they reached the choke point of the cylinder heads. The solution was to increase the cylinder bore spacing from 4.5", to 4.8", to 5", and now there are 5.3" and larger cylinder bore spacings. Heck, Sonny Leonard just released a 1005 CI engine...after most people thought the limit was just over 900 CI.

    My point is that even if you could build a block to support this displacement, it needs to breath, and I just don't think that the S54 head can keep up with the flow required. (Specifically port velocity)

    If you want to increase displacement, and make usable power, you need to figure out the cylinder head first.

    Why do you guys think it took 3 years for a "race head" to be finalized and delivered to my shop?
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  2. #27
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    Click here to enlarge Originally Posted by dreikraft Click here to enlarge
    as i mentioned earlier. i googled what time it was over there and picked up the phone. they were reluctant to tell me anything about the m3 they put it in. they didn't have any testimonials from customers and were actually quite rude. there's probably a reason none of us have heard of them Click here to enlarge
    Sounds like it doesn't even really exist.

  3. #28
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    Click here to enlarge Originally Posted by PEI330Ci Click here to enlarge
    If you want to increase displacement, and make usable power, you need to figure out the cylinder head first.

    Why do you guys think it took 3 years for a "race head" to be finalized and delivered to my shop?
    Does the S54 head have room to increase the valves/ports?

  4. #29
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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    Sounds like it doesn't even really exist.
    as of now, this kit is not tested yet.

    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    Does the S54 head have room to increase the valves/ports?
    yes it does have room, but how much is the question. There is room, limited.

    There is one misunderstanding: anyone can make a stroker system for S54.
    It may live in N/A form.

    Will a stroker S54 endure the harsh conditions of a turbo environment? Thats the point which should be enlightened.
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  5. #30
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    Click here to enlarge Originally Posted by Twinturbom3 Click here to enlarge
    Will a stroker S54 endure the harsh conditions of a turbo environment? Thats the point which should be enlightened.
    Good question and I do not know if anyone has the answer to it.

  6. #31
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    Click here to enlarge Originally Posted by Twinturbom3 Click here to enlarge
    as of now, this kit is not tested yet.



    yes it does have room, but how much is the question. There is room, limited.

    There is one misunderstanding: anyone can make a stroker system for S54.
    It may live in N/A form.

    Will a stroker S54 endure the harsh conditions of a turbo environment? Thats the point which should be enlightened.
    you talked to them?

  7. #32
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    Yes I did and not just once.
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  8. #33
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    when i talked to them it sounded like you'd get along Click here to enlarge

  9. #34
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    Will be testing a custom 3.7L S54 soon, my newborn son and winter will slow me but will be testing a 3700 cc soon.

    Will let you know how it works. I am excited as well.
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  10. #35
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    Click here to enlarge Originally Posted by Twinturbom3 Click here to enlarge
    Will be testing a custom 3.7L S54 soon, my newborn son and winter will slow me but will be testing a 3700 cc soon.

    Will let you know how it works. I am excited as well.
    Mert, have you any results with the 3.7L Stroked S54?

    I ordered a differential cover from them.. ($2200) they are outrageously overpriced on everything but the quality of everything I've seen from them is pretty insane.

  11. #36
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    Click here to enlarge Originally Posted by ZooyorQ Click here to enlarge
    Mert, have you any results with the 3.7L Stroked S54?

    I ordered a differential cover from them.. ($2200) they are outrageously overpriced on everything but the quality of everything I've seen from them is pretty insane.
    don't do it!

    i found out ms24s supplier/machine shop in germany if you want to go direct.

  12. #37
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    Click here to enlarge Originally Posted by dreikraft Click here to enlarge
    don't do it!

    i found out ms24s supplier/machine shop in germany if you want to go direct.
    Cool. Thanks for the info.
    Click here to enlarge



    EURO 04 M3 Current Mods:GC DAs, Eibach Sways, PF RTAB's, RE RCAs, INTRAVEE II, Black Roundels, ///MFEST Badges, Depo's, Screen protector for NAV display, VCSL Bumper + Race Lip & CF Trunk & CF Rear Diffusor, DIETZ TV in Motion, SS= V1 Headers + catless pipes + X-Pipe + SS Sport Exhaust, Z8 Starter Button, Lamin-X, OEM CSL interior, OEM CSL Steering, OEM CSL Intake, OEM CSL Roof, MSS54HP + OEM CSL Tune, BBS CH's, LIGHTWERKZ, 355mm ST40 BBK, BW Oil Cooler....

  13. #38
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    Click here to enlarge Originally Posted by dreikraft Click here to enlarge
    don't do it!

    i found out ms24s supplier/machine shop in germany if you want to go direct.
    Aww man... I lost my sig quote already.... :'(

  14. #39
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    Click here to enlarge Originally Posted by MisterEm Click here to enlarge
    Aww man... I lost my sig quote already.... :'(
    lol, hold on.

    remind me where i got it from. i want it back now

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    0 out of 3 members liked this post. Reputation: Yes | No
    did anybody get anywhere with this, it seems that they have great products. as of today

  16. #41
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    with 102 mm stroke S54 makes 3679 cc, so almost 3,7 Litres.

    So yes 3,7 Litres is possible, it is custom made, costs some money, but at the end of the day you drive a 3,7L S54.
    S54 B37
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  17. #42
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    Click here to enlarge Originally Posted by Twinturbom3 Click here to enlarge
    with 102 mm stroke S54 makes 3679 cc, so almost 3,7 Litres.

    So yes 3,7 Litres is possible, it is custom made, costs some money, but at the end of the day you drive a 3,7L S54.
    S54 B37
    Mert,

    Unless you increase the deck height of the block, this is not possible.
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  18. #43
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    Click here to enlarge Originally Posted by PEI330Ci Click here to enlarge
    Mert,

    Unless you increase the deck height of the block, this is not possible.
    I would have to agree.

  19. #44
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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    I would have to agree.
    Have you ever seen a S54 bare block in person, I wonder....
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  20. #45
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    Click here to enlarge Originally Posted by Twinturbom3 Click here to enlarge
    Have you ever seen a S54 bare block in person, I wonder....
    Several actually.

  21. #46
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    Click here to enlarge Originally Posted by Twinturbom3 Click here to enlarge
    Have you ever seen a S54 bare block in person, I wonder....
    Mert,

    It's not the block that's the issue really...it's the crank. Running that much stroke with OEM rods would see the wrist pin smashing into the counter-weights. The only way to make it work is to run a longer rod...but then the pistons would smash into the head at the stop of the stroke. Thus my comment about changing the deck height. It's possible... you just need to run a spacer on the top, sleeve the block, and run a custom timing chain.

    FYI, PTG (With BMW Motorsport's involvement) only went to 3.4L. They were running an intake restrictor thanks to the ACO, (Sanctioning body) which from a design perspective favours a bigger engine. Why do you think Chevy went with a lower rev'ing 7.0L V8 for their Le Mans Corvettes.....

    My preference with an FI S54 would be to create more plenum pressure. Once you reach the choke limit of the head with port velocity, the only way to make more power is to change the density of what's flowing through the head. (More boost)
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  22. #47
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    Adam,

    102 mm causes an ugly rod to stroke ratio and side wall loads will be excessive.

    lately, the big power Supras boost 45-50 psi. You are right moree boost more powerr.
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  23. #48
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    Nothing people have fit 3l7 kit ?

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    No news here

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    1 out of 1 members liked this post. Reputation: Yes | No
    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    Is there any example of a successfully running 3.7 liter S54?
    Sticky,

    The cut off for C-Mod is 3.49 liters. So the guys actually spending more $ on built S54's (there's a bunch of them) than pristine E9x M3 go for "could" go larger with ease but no BMW CCA rule book allows it for what they are using it for
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