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    • Maximum PSI (Max PSI) S54 / E46 M3 entry level turbo kit tuned on stock ECU/DME nearing completion, 467 wheel horsepower

      The E46 M3 turbo market does not have a large amount of competition but that may be changing shortly. Maximum PSI in New Jersey has been working on an entry level turbo kit for almost a year now and is seeing nice results putting down 467.9 wheel horsepower a nice increase from their preliminary 439 wheel horsepower dyno. What is significant here is not the power but the tuning on the stock ECU/DME and the entry level price point.

      Tuning is being handled by Technique Tuning whose owner is the only person to have a successful turbo kit for E46's thus far tuned on the stock DME. NickG as he is known has produced kits for M54 based vehicles and is arguably the best tuner to make this S54 kit happen on the stock DME. It is not easy as many tuners have failed attempting to do the same.

      Dyno is on 93 octane fuel. Turbo is a Precision 6266CEA.

      This is an absolutely incredible development for the S54 market and if NickG and Maximum PSI pull this off, major respect from the BMW tuning community is warranted. Good luck to all involved! Pictures below.

















      This article was originally published in forum thread: Maximum PSI (Max PSI) S54 / E46 M3 entry level turbo kit tuned on stock ECU/DME nearing completion, 467 wheel horsepower started by Sticky View original post
      Comments 150 Comments
      1. NickG's Avatar
        NickG -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        How exactly will you do different maps for different qualities of fuel?
        There's some learning in the system that can be taken advantage of when programmed appropriately.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by NickG Click here to enlarge
        There's some learning in the system that can be taken advantage of when programmed appropriately.
        What about being able to hand-held flash separate maps depending on fuel used?
      1. import36's Avatar
        import36 -
        this is great news! definitely will be keeping an eye on this project...as i've been in the market for fi for some time. really wanna go turbo but can't bring myself to go the HPF route just yet.
      1. maximumpsi's Avatar
        maximumpsi -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        A turbo should be more efficient so this looks fine. Don't understand some of the criticism.
        I don't think driekraft was complaining, he was saying it makes nice power for no meth injection.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by maximumpsi Click here to enlarge
        I don't think driekraft was complaining, he was saying it makes nice power for no meth injection.
        Not him, others.
      1. maximumpsi's Avatar
        maximumpsi -
        Click here to enlarge Originally Posted by flipm3 Click here to enlarge
        It would have been great though to see OBDII Readiness despite being catless. Not sure how the exhaust side is designed, but what catalytic converter would you be using? Is it a full single mid pipe or dual like stock?
        That would be illegal, and we couldn't sell a kit like that. Anyone releasing something like that is asking for a large fine down the road. I have some ideas for those looking to take things into their own hands.

        The catalyst is a high flow race cat from Random technology. The base kit comes with a 3" downpipe that splits into the stock section 2. A catalyst or 3" cutout can be installed in the downpipe.
      1. flipm3's Avatar
        flipm3 -
        Click here to enlarge Originally Posted by NickG Click here to enlarge
        That would be flat out illegal, as that is intentionally lying to pass an emissions test. Other companies have been shut down for this type of behavior. I don't plan on being one of them Click here to enlarge
        Click here to enlarge Originally Posted by maximumpsi Click here to enlarge
        That would be illegal, and we couldn't sell a kit like that. Anyone releasing something like that is asking for a large fine down the road. I have some ideas for those looking to take things into their own hands.
        Oh yeah, I totally agree with you both on it being illegal if you used with the intention of trying to pass emissions! For off road or track use only, I think would have been a nice feature for those who just prefer to not have codes pop up even though they know specifically what it is. But yeah, once again, I totally understand where you're coming from. Click here to enlarge


        Click here to enlarge Originally Posted by maximumpsi Click here to enlarge
        The catalyst is a high flow race cat from Random technology. The base kit comes with a 3" downpipe that splits into the stock section 2. A catalyst or 3" cutout can be installed in the downpipe.
        Nice! I hear great thinks about the RT cat! If you don't mind asking, what's the cell count on it?

        Thanks for clarifying on how it integrates with the remainder of the exhaust.
      1. BlackJetE90OC's Avatar
        BlackJetE90OC -
        Don't think the pricing is too bad. It is going to be a great solution and addition to the S54 market.

        But it is odd buying something that is 50% of the value of what most E46 M3's sell for these days. Actually most E46 M3's sell for well under $20k.
      1. maximumpsi's Avatar
        maximumpsi -
        Click here to enlarge Originally Posted by flipm3 Click here to enlarge
        Oh yeah, I totally agree with you both on it being illegal if you used with the intention of trying to pass emissions! For off road or track use only, I think would have been a nice feature for those who just prefer to not have codes pop up even though they know specifically what it is. But yeah, once again, I totally understand where you're coming from. Click here to enlarge



        Nice! I hear great thinks about the RT cat! If you don't mind asking, what's the cell count on it?.
        The "off road" calibration will still have a fully functional CEL that will only illuminate if a code is thrown. It won't have any catalyst codes stored, it just won't pass a catalyst readiness test.

        It is a 100 cell cat.
      1. maximumpsi's Avatar
        maximumpsi -
        Click here to enlarge Originally Posted by BlackJetE90OC Click here to enlarge
        Don't think the pricing is too bad. It is going to be a great solution and addition to the S54 market.

        But it is odd buying something that is 50% of the value of what most E46 M3's sell for these days. Actually most E46 M3's sell for well under $20k.
        That can be said for just about all of the available solutions. Even when you look at the entry level SC kits, most guys throw on headers/exhaust/etc. The ratio is even more lopsided when you look at turbo E36's. But it all becomes clear once you sit in the driver's seat Click here to enlarge
      1. flipm3's Avatar
        flipm3 -
        Click here to enlarge Originally Posted by maximumpsi Click here to enlarge
        The "off road" calibration will still have a fully functional CEL that will only illuminate if a code is thrown. It won't have any catalyst codes stored, it just won't pass a catalyst readiness test.

        It is a 100 cell cat.
        Oh! Yeah, I guess that's how I should of worded what I previously said. I was implying Post-Cat O2 codes simply not being stored and CEL! Thanks clarifying once again.

        If I ever decide to go boosted, there is no doubt this is the route I want to take!

        Exciting stuff.
      1. Eleventeen's Avatar
        Eleventeen -
        Click here to enlarge Originally Posted by maximumpsi Click here to enlarge
        What do you think a realistic turbo kit price should be? Do you know what the components used in the kit consist of? Have you priced out any supercharger kits?
        I'd say 6-7k considering they are using the stock DME and no aftermarket standalone is necessary. The power isn't that great for a turboed M3...
      1. Eleventeen's Avatar
        Eleventeen -
        Click here to enlarge Originally Posted by GG///M3 Click here to enlarge
        Many are clueless, and think food stamps should pay for mods maybe?????
        Clueless??? Obviously you haven't seen what an inline 6 cylinder should be capable of for 10k Click here to enlarge

        Oh, and the fact that they are using the stock computer means less hardware is necessary, so that's even less you should be paying for. I'm not sure what you mean saying HPF does this with built motors. There is a stock block HPF M3 running 700hp, so 460hp looks a little lame.
      1. NickG's Avatar
        NickG -
        Click here to enlarge Originally Posted by Eleventeen Click here to enlarge
        Clueless??? Obviously you haven't seen what an inline 6 cylinder should be capable of for 10k Click here to enlarge

        Oh, and the fact that they are using the stock computer means less hardware is necessary, so that's even less you should be paying for. I'm not sure what you mean saying HPF does this with built motors. There is a stock block HPF M3 running 700hp, so 460hp looks a little lame.
        So what you're saying is that the factory computer will automatically tune itself for a turbo install?

        Damn, I wish I would have spoken to you before!!!

        I've just wasted hundreds, if not thousands, of hours in R&D to do what nobody else has done. And all along the computer would just work with the factory stock programming. Man, where have you been all this time? Can I call you and pick your brain a bit......you obviously know way more about this stuff than anybody else.

        Click here to enlarge
      1. flipm3's Avatar
        flipm3 -
        Click here to enlarge Originally Posted by Eleventeen Click here to enlarge
        I'd say 6-7k considering they are using the stock DME and no aftermarket standalone is necessary. The power isn't that great for a turboed M3...
        Being a long time and current E46 M3 owner, I think that $9100-9500 is more than fair. The HPF Stage 1 on pump fuel makes potentially similar numbers and that is currently selling for $13,500. A $4000 difference is HUGE!

        Tuning the DME for a turbo kit is an incredible accomplishment. As silly as it may sound, I have heard of people complaining about something as "little" as constantly having a CEL with their HPF kits because it runs standalone. That would kind of bug me because how would I ever know if something else is going on with the car...

        I'll say this again, what NickG and MaximumPSI accomplished is truly admirable and inspiring. Well done guys! No doubt this kit will sell like hot cakes!
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by BlackJetE90OC Click here to enlarge
        But it is odd buying something that is 50% of the value of what most E46 M3's sell for these days. Actually most E46 M3's sell for well under $20k.
        A pristine E46 M3 won't be sub $20k.

        It's how it is with modding though. An E55 AMG can be picked up for the low 20's or even less than $20k and a supercharger upgrade from Weistec costs $8-9k. But when you put the numbers together it's still far less than buying a new M3 or new E63 with more power than those cars have stock.
      1. flipm3's Avatar
        flipm3 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        A pristine E46 M3 won't be sub $20k.

        It's how it is with modding though. An E55 AMG can be picked up for the low 20's or even less than $20k and a supercharger upgrade from Weistec costs $8-9k. But when you put the numbers together it's still far less than buying a new M3 or new E63 with more power than those cars have stock.
        I must be backwards because I think that, because the E46 M3 is much more affordable than they used to be, that there should be even more reason to spend quality dollars on top products! I think that's a big reason as to why there is a such a big urgency to continue developing great products for these cars/ There has a been a quantum leap in NA and FI application for this car very recently and the hunger from E46 M3 owners and tuners are no where near satiated!
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by flipm3 Click here to enlarge
        because the E46 M3 is much more affordable than they used to be, that there should be even more reason to spend quality dollars on top products!
        I think this is sound reasoning.
      1. flipm3's Avatar
        flipm3 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        I think this is sound reasoning.
        ...that's what I tell myself at night so I don't feel guilty for spending tons of pennies on my E46 M3...haha
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by flipm3 Click here to enlarge
        ...that's what I tell myself at night so I don't feel guilty for spending tons of pennies on my E46 M3...haha
        It would be tons more pennies on a new car!

        Plus the E46 M3 is still good looking and a ton of fun to drive. Only can get more fun with all these new developments.