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    • Gintani shooting for first 1000+ rwhp S85 V10 with YSI-B supercharged 5.5 liter stroker BMW E63 M6

      When it comes to the most powerful supercharged S85 V10's in the BMW world it is Gintani and nobody else. They are looking to be the first to hit the vaunted quadruple digit mark supercharged on the S85 V10 and this built may just be the trick.


      This is not your standard S85 V10. It is a built 10.0:1 compression 5.5 liter stroker. It is supercharged with the new Vortech YSi-B head unit.

      V-7 YSi:

      Internal Step-Up Ratio: 3.45:1
      Max Speed: 66,000 RPM
      Max Boost: 30+ PSI
      Max Flow: 1,600 CFM
      Max Power: 1,200+ HP
      Peak Efficiency: 78%

      V-7 Ysi-B:

      Internal Step-Up Ratio: 3.45:1
      Max Speed: 65,000 RPM
      Max Boost: 30+ PSI
      Max Flow: 1,950 CFM
      Max Power: 1,400+ HP
      Peak Efficiency: 78%

      Is it enough blower to get there? We will see but right now it is very, very hot in Southern California.

      Whether it cracks four digits or not this will be the most powerful supercharged S85 V10 in the world. Dynographs to come when the weather cools a bit.


      This article was originally published in forum thread: Gintani shooting for first 1000+ rwhp S85 V10 with YSI-B supercharged 5.5 liter stroker BMW E63 M6 started by Sticky View original post
      Comments 22 Comments
      1. Blown6's Avatar
        Blown6 -
        How much power can the stock motor and tranny handle?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Blown6 Click here to enlarge
        How much power can the stock motor and tranny handle?
        8XX to the wheels: https://www.bimmerboost.com/showthre...t-of-an-E64-M6
      1. Blown6's Avatar
        Blown6 -
        Wonder of the whine of the supercharger detracts from the melodious v10
      1. benzy89's Avatar
        benzy89 -
        Stock DME or Syvecs?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by benzy89 Click here to enlarge
        Stock DME or Syvecs?
        Factory computer as far as I know. I'll double check.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by benzy89 Click here to enlarge
        Stock DME or Syvecs?
        Factory DME
      1. leveraged sellout's Avatar
        leveraged sellout -
        I have heard that the SMG starts to freak out above certain power levels, if you read Jim Colley's posts on M5board about how it works, it'll blow your mind. The algorithms and control logic for the SMG III are probably some of the most complex on any gearbox anywhere, as far as I can tell. It takes a lot of variables into account, and starts to get unhappy past certain torque values. So it's cool that people are going this high.

        Interesting note too - he's worked on many of these things, and he's pointed out (along with many others) that the actual, mechanical limits of the clutch and gearbox are high enough that he's never encountered one that had a genuinely worn out clutch or otherwise damaged gearbox from too much power. The hydraulic system may be a major PITA but mechanically, the gearbox itself is very tough. There's not even really a good aftermarket clutch kit for these cars, SPEC makes one but apparently it's very hard to get SMG to adapt with it, and it's not much better than OEM anyway. Something of note, SMG III has carbon fiber synchros...not many gearboxes ever in a street car that have that.

        Overall, it does seem like DCT might be the way to go for insane power builds, would be nice to see these things regularly hit 4 digit power figures but these cars are cheap enough now that the people who buy them on average aren't really able to afford the builds required to do so, I imagine. And, even once they have saved up enough to start trying, something will inevitably break and wipe them out again. Also, not a lot of space under the hood, these things are really wedged in there.

        I know the S65 block starts to flex at a certain point, and I'm guessing the S85 has tough but still somewhat delicate internals relative to modern FI cars...I'm surprised that they're holding together at over 750 whp. Very impressive. Of course, the engine is such a tight fit in the E60/61/63/64 engine bays, it starts to cook everything else even stock. The angel eyes often short out because the S85 cooks the wiring in the headlights and BMW under spec'd the insulation on those particular wires. Heat would be my main concern with a boosted V10, they're hot as hell even from the factory and in top operating form.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by leveraged sellout Click here to enlarge
        I have heard that the SMG starts to freak out above certain power levels, if you read Jim Colley's posts on M5board about how it works, it'll blow your mind. The algorithms and control logic for the SMG III are probably some of the most complex on any gearbox anywhere, as far as I can tell. It takes a lot of variables into account, and starts to get unhappy past certain torque values. So it's cool that people are going this high.

        Interesting note too - he's worked on many of these things, and he's pointed out (along with many others) that the actual, mechanical limits of the clutch and gearbox are high enough that he's never encountered one that had a genuinely worn out clutch or otherwise damaged gearbox from too much power. The hydraulic system may be a major PITA but mechanically, the gearbox itself is very tough. There's not even really a good aftermarket clutch kit for these cars, SPEC makes one but apparently it's very hard to get SMG to adapt with it, and it's not much better than OEM anyway. Something of note, SMG III has carbon fiber synchros...not many gearboxes ever in a street car that have that.

        Overall, it does seem like DCT might be the way to go for insane power builds, would be nice to see these things regularly hit 4 digit power figures but these cars are cheap enough now that the people who buy them on average aren't really able to afford the builds required to do so, I imagine. And, even once they have saved up enough to start trying, something will inevitably break and wipe them out again. Also, not a lot of space under the hood, these things are really wedged in there.

        I know the S65 block starts to flex at a certain point, and I'm guessing the S85 has tough but still somewhat delicate internals relative to modern FI cars...I'm surprised that they're holding together at over 750 whp. Very impressive. Of course, the engine is such a tight fit in the E60/61/63/64 engine bays, it starts to cook everything else even stock. The angel eyes often short out because the S85 cooks the wiring in the headlights and BMW under spec'd the insulation on those particular wires. Heat would be my main concern with a boosted V10, they're hot as hell even from the factory and in top operating form.
        Great post and I think we can get @jcolley to chime in.

        For me, the winning recipe would be S85 + blower + DCT

        If someone could demonstrate controllers actually getting the DCT to mate and work with the S85 I'd seriously consider it.
      1. leveraged sellout's Avatar
        leveraged sellout -
        I keep forgetting he's on here Click here to enlarge And in fact, I think he may very soon have the DCT sorted, from what I've seen lately. That would be excellent, if even just for a reliability standpoint...there's a surprisingly large supply of lightly used DCTs from E9x M3s, and they're not that expensive all things considered. And they don't break, certainly not with NA or lightly boosted S85s.

        Also, driving the SMG in city traffic is truly comical...it's confused and upset when it's forced to do this. At least mine is. It's not terrible, I suppose...but it is quite slow and it does clunk, which feels expensive.
      1. Blown6's Avatar
        Blown6 -
        Sounds like it needs some hood vents! Is there a proven nitrous kit for this motor?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Blown6 Click here to enlarge
        Sounds like it needs some hood vents! Is there a proven nitrous kit for this motor?
        People were doing direct port setups ages ago. It takes 150+ shots like a champ.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by leveraged sellout Click here to enlarge
        I keep forgetting he's on here Click here to enlarge And in fact, I think he may very soon have the DCT sorted, from what I've seen lately. That would be excellent, if even just for a reliability standpoint...there's a surprisingly large supply of lightly used DCTs from E9x M3s, and they're not that expensive all things considered. And they don't break, certainly not with NA or lightly boosted S85s.

        Also, driving the SMG in city traffic is truly comical...it's confused and upset when it's forced to do this. At least mine is. It's not terrible, I suppose...but it is quite slow and it does clunk, which feels expensive.
        He's waiting for a DCT controller from what I understand. It's a complete standalone.
      1. MSIZZLE's Avatar
        MSIZZLE -
        I think the s85 is one of the most spectacular motors of all time, I had a v10 M6 that was 508whp and I had a V8 m6 that was 728whp. Obviously the s63tu was incredibly powerful and way faster but man the soul and sound of the s85 was magnificent. Now I have a V10 R8 and of course slower than my M6 but man do I love the sound and usable performance. I think the perfect R8 is either one of the SC kit or a base TT kit that is around 750ish whp that the car can drive around forever and happy at.
      1. subaru335i's Avatar
        subaru335i -
        Click here to enlarge Originally Posted by leveraged sellout Click here to enlarge
        Something of note, SMG III has carbon fiber synchros...not many gearboxes ever in a street car that have that.
        That isn't true. A lot of cars come with carbon synchros now from the factory. Even $#@!ing subarus have had them for years and years.
      1. lulz_m3's Avatar
        lulz_m3 -
        Click here to enlarge Originally Posted by leveraged sellout Click here to enlarge
        The angel eyes often short out because the S85 cooks the wiring in the headlights and BMW under spec'd the insulation on those particular wires. Heat would be my main concern with a boosted V10, they're hot as hell even from the factory and in top operating form.
        It was a soy based wiring unsulation that they switched to so they could be in compliance with some tree hugging reqs. I dont think it has anything to do with the v10, they cracked and fell apart on my 07 335 also. Had to replace all the wiring.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by MSIZZLE Click here to enlarge
        I think the s85 is one of the most spectacular motors of all time, I had a v10 M6 that was 508whp and I had a V8 m6 that was 728whp. Obviously the s63tu was incredibly powerful and way faster but man the soul and sound of the s85 was magnificent. Now I have a V10 R8 and of course slower than my M6 but man do I love the sound and usable performance. I think the perfect R8 is either one of the SC kit or a base TT kit that is around 750ish whp that the car can drive around forever and happy at.
        People don't get that an S85 V10 revving out to 8300 rpm is more exciting than a torque hit down low with a crap curve.

        I don't care if an N54 wins a stoplight race with an E60 M5. No matter what torque figure the dyno shows it will never be a more exciting motor, better sounding, more fun to drive, etc.
      1. leveraged sellout's Avatar
        leveraged sellout -
        @subaru335i Is that so? I had no idea, thanks for the info. For some reason when reading this about SMG III I was informed it was a unique feature.

        I've been inside more than a few gearboxes and hadn't ever encountered it so I suppose I just took it at face value. Does make sense, as it's the perfect material to use for this application.
      1. leveraged sellout's Avatar
        leveraged sellout -
        Click here to enlarge Originally Posted by lulz_m3 Click here to enlarge
        It was a soy based wiring unsulation that they switched to so they could be in compliance with some tree hugging reqs. I dont think it has anything to do with the v10, they cracked and fell apart on my 07 335 also. Had to replace all the wiring.
        I trimmed the factory stuff and rewired with heavier-gauge pigtailed connectors - stripped a fairly long length of what was left of the factory leads and double heat-shrunk the joints after I spliced them together...and it's still starting to come apart again about a year later.

        Soy finds a way to ruin the world everywhere it goes, I suppose.
      1. lulz_m3's Avatar
        lulz_m3 -
        Click here to enlarge Originally Posted by leveraged sellout Click here to enlarge
        I trimmed the factory stuff and rewired with heavier-gauge pigtailed connectors - stripped a fairly long length of what was left of the factory leads and double heat-shrunk the joints after I spliced them together...and it's still starting to come apart again about a year later.

        Soy finds a way to ruin the world everywhere it goes, I suppose.
        Turns me into a rocket ship everytime i eat at a Whole Foods buffet...
      1. Mikecoupe's Avatar
        Mikecoupe -
        @Sticky,
        Why did Gintani stopped the turbo project on your car?
        Is it impossible to turbo the M3 e92 4.0L engine?