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    • A 190k mile E46 M3 with stock internal turbocharged S54 making 721 rwhp

      Ah, the S54. A work of absolute art and the last great naturally aspirated iron block inline-6 from BMW. One of the greatest M motors ever made as well. Need proof? Well, how about a stock internal example with 190k miles producing 721 horsepower to the wheels?


      The S54 had a poor reputation early on due to bearing issues (typical BMW) but with the proper bearings the motor shows just how stout it is. Plus, this is an 11.5:1 compression naturally aspirated engine and with a bit of boost really sings;


      When we say BMW does not make them like they used to, this is what we mean.

      This E46 M3 belongs to BimmerBoost member @DocCarbon:

      I managed to put the car on a dyno a couple weeks ago with the newer setup. The pressure was running up to 25 psi and dropping down below 20 psi by redline. I'm still happy with the numbers for a stock block s54. Peak was about 720 whp. When I got the car home I found the intake manifold had a crack and was leaking. A friend of mine was nice enough to reweld it, reinforce it and it's holding 24+ psi consistently to redline now. I'm looking forward to getting it back on the dyno to turn it up a little more.
      Setup:
      Kit by MaxPsi
      BW s300sxe 64.5/66
      E85 driven by 2 walbro 485's and a BAP.
      Id1000 injectors
      Exhaust cutout

      This article was originally published in forum thread: Dynojet numbers started by DocCarbon View original post
      Comments 24 Comments
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by DocCarbon Click here to enlarge
        I'm still happy with the numbers for a stock block s54. Peak was about 720 whp.
        720 whp stock internal S54 on E85? Is that right?
      1. DocCarbon's Avatar
        DocCarbon -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        720 whp stock internal S54 on E85? Is that right?
        I replaced the rod bearings on it last year but otherwise it's stock with 190k miles.
      1. ECBm3m5's Avatar
        ECBm3m5 -
        That's awesome. I have a MaxPSI setup as well. Just a Stg 1 making almost 500whp. Your numbers look great.
      1. Sticky's Avatar
        Sticky -
        Ah, the S54. A work of absolute art and the last great naturally aspirated iron block inline-6 from BMW. One of the greatest M motors ever made as well. Need proof? Well, how about a stock internal example with 190k miles producing 721 horsepower to the wheels?

        Click here to enlarge

        The S54 had a poor reputation early on due to bearing issues (typical BMW) but with the proper bearings the motor shows just how stout it is. Plus, this is an 11.5:1 compression naturally aspirated engine and with a bit of boost really sings;

        Click here to enlarge

        When we say BMW does not make them like they used to, this is what we mean.

        This E46 M3 belongs to BimmerBoost member @DocCarbon:

        I managed to put the car on a dyno a couple weeks ago with the newer setup. The pressure was running up to 25 psi and dropping down below 20 psi by redline. I'm still happy with the numbers for a stock block s54. Peak was about 720 whp. When I got the car home I found the intake manifold had a crack and was leaking. A friend of mine was nice enough to reweld it, reinforce it and it's holding 24+ psi consistently to redline now. I'm looking forward to getting it back on the dyno to turn it up a little more.
        Setup:
        Kit by MaxPsi
        BW s300sxe 64.5/66
        E85 driven by 2 walbro 485's and a BAP.
        Id1000 injectors
        Exhaust cutout
      1. DocCarbon's Avatar
        DocCarbon -
        Click here to enlarge Originally Posted by ECBm3m5 Click here to enlarge
        That's awesome. I have a MaxPSI setup as well. Just a Stg 1 making almost 500whp. Your numbers look great.
        Thanks, this started out as a stage 1 kit and slowly evolved. They do solid work, I'm impressed by Mike and the shop.
      1. vrsixxxxxx's Avatar
        vrsixxxxxx -
        props to the high hp
      1. Stevenh's Avatar
        Stevenh -
        Very nice! Tuned on stock ECU?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Stevenh Click here to enlarge
        Very nice! Tuned on stock ECU?
        I would assume so as Max PSI is really the only one that does it (or does it properly).
      1. stosh1's Avatar
        stosh1 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        I would assume so as Max PSI is really the only one that does it (or does it properly).
        There are others that can tune a turbo on the factory ECU , but yeah, Nick G was kinda the first to do it w/a turbo system.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by stosh1 Click here to enlarge
        Nick G was kinda the first to do it w/a turbo system.
        Whatever happened to him? @NickG
      1. stosh1's Avatar
        stosh1 -
        He's still tuning some for MaxPSI, but beyond that, I'm not really sure...
      1. ECBm3m5's Avatar
        ECBm3m5 -
        Did you start with a 6266 turbo and the Stg 1 sized intercooler? I wouldn't mind turning mine up a little.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by ECBm3m5 Click here to enlarge
        Did you start with a 6266 turbo and the Stg 1 sized intercooler? I wouldn't mind turning mine up a little.
        @DocCarbon
      1. DocCarbon's Avatar
        DocCarbon -
        I started with the stage 1 with the 6266. Then I went to stage 2 e85 and the fuel system off the shop car I believe. It included the bigger fuel injectors, radium surge tank, flex fuel sensor, ecu re-programming and some hookups to make draining gas out of the tank easier.

        The 6266 has pretty good power, IIRC the shop ran 9.74 at 26 psi with e85 on it. However the shop said the smaller turbo is more likely to bend rods because the torque hit is lower in the rpm band.

        On my car, the intake rubbed and metal debris made the turbo smoke so I upgraded to a bigger one with the intention of running more power and moving the power further up. The intercooler is still the original one. However the higher pressure than the shop intended does tend to crack the weld by the throttle bodies on the intake manifold. It was leaking a decent amount of metered air when I was on the dyno otherwise the numbers would have been a bit higher.

        I may drop in a set of rods, arp head studs and a cut ring head gasket this winter if I get ambitious. I'm nervous about bending a rod or lifting the head as it sits.
      1. ECBm3m5's Avatar
        ECBm3m5 -
        Thanks Doc. I haven't communicated with Mike since I installed my kit awhile ago. The directions I received for the eBoost settings seemed fairly specific: Stg 1 pump gas 9psi max, race gas 13psi max. Stg 2 kits needed MS 109 with a target of 18psi. So I haven't adjusted my settings much. I do have an Aquamist water meth kit installed. I didn't tune for it specifically, just mainly for safety. e85 isn't really an option for me. With your knowledge on the upgrade process, if I stick with 93oct is it best to stay where I am? From what I read, these motors seem pretty strong. Thanks for any info.
      1. 7to3_enthusiast's Avatar
        7to3_enthusiast -
        nice, we have very similar setups. Should last a long time, I'm at 215k miles now on mine, 720 rwhp maxpsi 6870. Cracked that intake mani 3 times haha
      1. vrsixxxxxx's Avatar
        vrsixxxxxx -
        Good care and a good tune will make things last a very long time
      1. DocCarbon's Avatar
        DocCarbon -
        Click here to enlarge Originally Posted by ECBm3m5 Click here to enlarge
        if I stick with 93oct is it best to stay where I am? From what I read, these motors seem pretty strong. Thanks for any info.
        I ran mainly 93 oct on my stage 1 kit. Compared to 91, I don't think there is enough of a benefit to increase the pressure more. Mine was set closer to 10 psi on pump but it doesn't make a big difference. I thought about an aquamist system but I really don't know anything about them. It might let you run more boost if you get it dialed in like the old hpf kits. The motors are really strong when the tune is good. I was reading an old thread a couple days ago where they claimed the max pressure you could run on the s54 was 12 psi before it broke the ring lands based on the poster's first hand experience.

        Click here to enlarge Originally Posted by 7to3_enthusiast Click here to enlarge
        nice, we have very similar setups. Should last a long time, I'm at 215k miles now on mine, 720 rwhp maxpsi 6870. Cracked that intake mani 3 times haha
        Very nice! I'll probably kick myself later for not going with the 6870. The lag on the BW is bad compared to the 6266. This was only my 2nd time cracking the manifold, Mike mentioned they were seeing it with the higher boost setups. Hopefully it's the last time for me, it's reinforced all along the edge now and has a diamond shaped plate welded to the top as well to stiffen it up. Did they weld the dowels inside of yours?
      1. ECBm3m5's Avatar
        ECBm3m5 -
        Click here to enlarge Originally Posted by 7to3_enthusiast Click here to enlarge
        nice, we have very similar setups. Should last a long time, I'm at 215k miles now on mine, 720 rwhp maxpsi 6870. Cracked that intake mani 3 times haha
        Anthony, that you?
      1. Sticky's Avatar
        Sticky -
        This thread sure makes me miss my E46 M3 and miss that I never got to turbo it even more...