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    • RPI (Race Precision) customized Stage III ESS VT2 supercharged E60 M5 S85 V10 hits 576.8 wheel horsepower

      S85 V10 supercharger kits have lagged pretty far behind S65 development despite the V10 making its debut well before the V8. There are several reasons for this but the supercharged V10's are starting to come into their own. RPI refers to this setup as a Stage III and we are not exactly sure what that means. Higher boost most definitely but what else? Meth? Race gas tune? What fuel was used for the dyno runs and what boost? Why are these details missing?

      The vehicle in question has the RPI headers, RPI exhaust, and the RPI oil cooler. 576 wheel on a dyno dynamics is pretty good although this not in shootout mode and compared to other dyno dynamics numbers BimmerBoost's experience with RPI's Dyno Dynamics tells us it is corrected quite a bit. To remove any speculation we would like to see a dyno in shootout mode but since that will not present higher numbers we will not see it. This setup would yield over 600 whp on a dynojet though which we are fairly certain of especially considering a stock M5 puts out 390 whp on the RPI dyno and a stock M5 puts out around the ~420 range on a dynojet.

      That would mean a rough estimate of 621 whp on a dynojet. Not bad for what we would guess is a high boost and high octane setup on the stock motor. If the kit was using something larger like the Vortech T-trim, these results would be more impressive on the V10 especially versus T-trim E9X M3's which have cracked the 600 wheel mark.




      This article was originally published in forum thread: RPI (Race Precision) customized Stage III ESS VT2 supercharged E60 M5 S85 V10 hits 576.8 wheel horsepower started by Sticky View original post
      Comments 43 Comments
      1. ur20v's Avatar
        ur20v -
        I'd like to know what holds the S85 back compared to the S65. It might be room for plumbing and lack of space for the required extra cooling? But the cost per HP seems to be high for the S85. May be as more tuners look at the S85 it might bring parity?

        I'm still not happy with what I see in these kits (hot air intakes for one!?). I'll sit and watch.

        As for comparing turbo tuning, its an unfair playing field were the turbos will push more power and torque for a lot less buck so no point in going there. No one has come close to a workable S65 or S85 turbo kit.

        Jay
      1. ur20v's Avatar
        ur20v -
        And I note the bonnet open verse shut debate when dynoing is muddied by the RPI car having louvred bonnet, also having the bonnet (hood) popped will make a difference in engine bay temps. I point this out as it appears to be a hot potatoe for tuners!
        Jay
      1. DBFIU's Avatar
        DBFIU -
        Msizzle has a point. I find those gains way to low to call this a stage 3 kit, whatever that means. To me at least, stage 3 means serious horsepower, 600-700 or 800 HP. 576 at the wheels is a stage 1 kit IMO for a car that comes stock with 500 at the crank.
      1. Sorena's Avatar
        Sorena -
        The problem is the headers and other stuff are designed to fit on a NA engine not a FI. the ESS kit is good for 561whp so all the other mods are just good for 20whp ( Yes i know RPI dyno is a Dyno Dynamics ) while the very same mods add 60whp on a NA S85.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by ur20v Click here to enlarge
        I'd like to know what holds the S85 back compared to the S65. It might be room for plumbing and lack of space for the required extra cooling? But the cost per HP seems to be high for the S85. May be as more tuners look at the S85 it might bring parity?

        I'm still not happy with what I see in these kits (hot air intakes for one!?). I'll sit and watch.

        As for comparing turbo tuning, its an unfair playing field were the turbos will push more power and torque for a lot less buck so no point in going there. No one has come close to a workable S65 or S85 turbo kit.

        Jay
        The S85 has more potential, nothing is really holding it back other than the lack of development.

        I don't exactly get why the ECU and tuning seemed to be tougher on the S85. Maybe less people were trying and there is less cracked code to go around?

        There won't be a S85 turbo kit. The motor itself has been turbo'd just not in an E60 body and we will likely never see a turbo kit.

        From what I saw about the updated Gintani design I like what they are doing.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by ur20v Click here to enlarge
        And I note the bonnet open verse shut debate when dynoing is muddied by the RPI car having louvred bonnet, also having the bonnet (hood) popped will make a difference in engine bay temps. I point this out as it appears to be a hot potatoe for tuners!
        Jay
        RPI leaves the bonnet popped. I discussed this with Eloy, he has his own procedures on what he likes to do. You are right that it open or closed will change numbers.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Sorena Click here to enlarge
        The problem is the headers and other stuff are designed to fit on a NA engine not a FI. the ESS kit is good for 561whp so all the other mods are just good for 20whp ( Yes i know RPI dyno is a Dyno Dynamics ) while the very same mods add 60whp on a NA S85.
        As I stated this is easily over 600 whp on a dynojet.

        I think the blower they chose is just way too small.
      1. Sorena's Avatar
        Sorena -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        As I stated this is easily over 600 whp on a dynojet.

        I think the blower they chose is just way too small.
        60whp difference isn't enough to call it stage III. What i'm wondering is the headers they use, i would like to know if they are using the ESS FI long tube headers or not.

        And you said it right, the blower is too small. They should have done a twin SC setup.

        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Maybe less people were trying and there is less cracked code to go around?
        Exactly. S65 uses Siemens MS2 ECU while S85 uses a basic MS version which is easier to crack and has less sensors than S65.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Sorena Click here to enlarge
        60whp difference isn't enough to call it stage III. What i'm wondering is the headers they use, i would like to know if they are using the ESS FI long tube headers or not.

        And you said it right, the blower is too small. They should have done a twin SC setup.
        I don't think you need a twin SC setup as much as a big single. Twin or no twin a big ass single is where it is at. Something like a Procharger F1 series.

        Click here to enlarge Originally Posted by Sorena Click here to enlarge
        Exactly. S65 uses Siemens MS2 ECU while S85 uses a basic MS version which is easier to crack and has less sensors than S65.
        Seems like the problem is competition then. Still, these kits are taking really long to get out and that has to be due to the tuning.
      1. 0-60Motorsports's Avatar
        0-60Motorsports -
        Is this kit intercooled?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by 0-60Motorsports Click here to enlarge
        Is this kit intercooled?
        Here: http://www.bimmerboost.com/content.p...95-for-the-VT2

        Click here to enlarge
      1. 0-60Motorsports's Avatar
        0-60Motorsports -
        Thats good that their VT2 is intercooled. If anyones going to install it on their cars in our weather we'll need that interocoler plus an RPi oil cooler for sure
      1. 5soko's Avatar
        5soko -
        Great thread! What did you like about the Evosport headers.. i was never a fan of it since there not equal length, but interesting to hear feedback non the less.
      1. MSIZZLE's Avatar
        MSIZZLE -
        I got 40whp from my evosport headers. And why is there such little info on these kits as far ao i.dependent dynos and real world numbers?? Like the gpower kit, if i got one the day i got the car back i would be at the strip to get my ets and traps!! Then i would have race vids with all the local competition
      1. MSIZZLE's Avatar
        MSIZZLE -
        Other than there top speed runs are there any vids of a gpower car racing or at the strip? Will it crack the 10's with dr's
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by MSIZZLE Click here to enlarge
        Other than there top speed runs are there any vids of a gpower car racing or at the strip? Will it crack the 10's with dr's
        Very few people have that kit. It's expensive as holy hell.
      1. Sorena's Avatar
        Sorena -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Very few people have that kit. It's expensive as holy hell.
        SK-III is a $30,000 setup, right?

        OT, when i was in Turkey i met a guy with a matte black SK-III M6. He showed me a picture of Vbox screen showing a 60-130 in 5.7 seconds.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Sorena Click here to enlarge
        SK-III is a $30,000 setup, right?

        OT, when i was in Turkey i met a guy with a matte black SK-III M6. He showed me a picture of Vbox screen showing a 60-130 in 5.7 seconds.
        No, the SK-III is much more than that. I think $70k or something like that. SK-II is in the 40's if I recall correctly.

        60-130 in 5.7? I don't know.
      1. MSIZZLE's Avatar
        MSIZZLE -
        yea but thats will all the aero parts and rims, i would only want the motor parts from them, its just so weird to me that a company does nothing to bring attention to there product and then EVERY customer they have is a private guy not on the forums who doesnt race or track his car that he just spent 70k to make it faster??? wtf???
      1. MSIZZLE's Avatar
        MSIZZLE -
        and sticky i dont think it has anything to do with the prive because look at all these ugr gallardos that have 60-130k under the hood plus the cost of a 200k lambo!! they are pretty common for what it is now, these ams alpha 12 gtrs that are north of a 100k for the kits are starting to pop up all over the place too, or even the lesser kits that cost over 60k. So there is not one really wealth guy on the planet that has the money and happens to love the s85 and wants to show case its performance???