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    • The answer to direct injection fueling limitations/issues may be... combining port injection? KS Tuned/Kaizenspeed BMW N54 port injection manifold

      Those familiar with BMW N54 six-cylinder tuning know that the platform has been held back from achieving its maximum potential by the fueling system. Many turbocharger upgrades from dual to single solutions are available but if you can't get enough fuel into the motor what is the point of having a big turbo? The HPFP (high pressure fuel pump) for the direct injection system has a reputation of providing fueling headaches (or failing altogether) even at modest power levels.



      With direct injection the high pressure needed to inject large amounts of fuel in a short window (that gets smaller as revs go up) requires some seriously powerful fuel pumps. Thus far in the time the N54 motor has been the market (which is approaching a decade) no tuner has delivered a fully functional direct injection HPFP or LPFP solution to support the largest turbo options.

      It isn't easy (and tuners are working on making it happen with the direct injection system) but some are going outside the direct injection fuel system altogether. That is what you see here from KS Tuned / Kaizenspeed. Their solution is a port injection manifold which supplies extra fuel. Some may call this a band-aid or not a proper solution but if it works it certainly is much better than no solution at all.

      Keep in mind there are cars on the market that use both port and direct injection successfully. The most obvious example is the Toyota 86 platform which is produced by Subaru as the BRZ model and Toyota as the Scion FR-S. This chassis uses a Subaru designed 2.0 liter four-cylinder motor known as the FA20.

      Direct injection allows a fairly high 12.5:1 compression ratio thanks to the cylinder cooling effects as well as a leaner tune for fuel efficiency. Working in conjunction with the direct injection system four 205 cc Denso port injectors that supply additional fuel. Essentially a balance between a fuel efficiency design and enough fuel to make power is struck. This same sort of solution may be the answer for the N54.

      The problem though is what will control the additional injectors and coordinate with the direct injection system on the N54? Pro-Efi announced over a year ago they were working on this yet thus far no positive results have been shown. CP-E (Custom Performance Engineering) is also working on a port injection solution. Additionally, Defiv is also working on hardware for a port injection system. The problem wont' be the hardware here as much as the tuning to get a system never designed with a dual injection fuel system in mind to function.

      Does KS Tuned have the answer? We will have to wait and see. Making a computer model is easy, applying a design in real life is something else entirely. At lest we know more people are working on the N54 fuel system and eventually a solution will be available. The main question being how long is eventually.








      This article was originally published in forum thread: Aftermarket Intake Manifold started by lulz_m3 View original post
      Comments 64 Comments
      1. Sticky's Avatar
        Sticky -
        Is it weird this is the first I'm hearing of these guys?
      1. lulz_m3's Avatar
        lulz_m3 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Is it weird this is the first I'm hearing of these guys?
        We've talked about them before, but it looks like they stay pretty low key. They were at one of the West Coast roll racing events a few months back with their single turbo powered N54 running supplemental PI.
      1. lulz_m3's Avatar
        lulz_m3 -
        btw @Sticky, have you even gone to sleep yet? Click here to enlarge Or just up early?
      1. Sticky's Avatar
        Sticky -
        This... may call for an article:

        N54 Port Injection
        1,000+ Horsepower Capable | Supports Alternate Fuels | Unlimited Engine Control Strategies


        So it’s been over a year since we created this model and it’s now time that we move to the next step. KAIZENSPEED / KStuned.com has a 335i with functioning supplemental port injection and we’d like to move forward with casting this intake manifold. But the market would need to support 100 units to support a production run. Surely there’s 100 people/teams/groups that are annoyed at the relatively low power ceiling of the N54?

        We’ve been watching this market closely and determined that port injection with consistent, reliable control is a requirement for big, reliable power. Port injection can provide many benefits that are not going to be discussed here. The purpose here is to gauge interest in a port-injection intake manifold for the BMW N54 engine.
        So we ask that you please share this post and share these photos. Please share generously.

        Post this on the forums and discuss. Send the screenshots to your friends, fellow-enthusiasts, tuners and race teams. Criticize us, encourage us, engage us in any way you need. But please don’t ignore it.


      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by lulz_m3 Click here to enlarge
        btw @Sticky, have you even gone to sleep yet? Click here to enlarge Or just up early?
        No sleep yet.
      1. lulz_m3's Avatar
        lulz_m3 -
        @Sticky, not sure if it goes against your policy on vendor accounts, but why not reach out to them and ask for pictures/vids/details of the functioning PI setup and single turbo kit and front page it? I imagine it would definitely draw some attention; i haven't seen their setup posted anywhere.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by lulz_m3 Click here to enlarge
        @Sticky, not sure if it goes against your policy on vendor accounts, but why not reach out to them and ask for pictures/vids/details of the functioning PI setup and single turbo kit and front page it? I imagine it would definitely draw some attention; i haven't seen their setup posted anywhere.
        If they're interested they usually come to me. I'll write something up and dig a little bit considering they said to engage them.
      1. MDORPHN's Avatar
        MDORPHN -
        Fuel management?

        Neil
      1. V8Bait's Avatar
        V8Bait -
        Trying to think of advantages over a spacer block from a cost/benefit perspective. Better injector angle, no cylinder one bump maybe, dunno. Need more info.
      1. mjmarovi's Avatar
        mjmarovi -
        Hey, I'm for anything out there, but what troubles me a bit is that they apparently have a ST running around that's been to events as mentioned by @lulz_m3 but how come we never heard of this car? If their own car isn't doing anything impressive then I can't see spending money on their products. However, if this proves to be work I'll be all over it.
      1. bigdnno98's Avatar
        bigdnno98 -
        Click here to enlarge Originally Posted by MDORPHN Click here to enlarge
        Fuel management?

        Neil
        This. What's controlling the additional injectors?
      1. carcars's Avatar
        carcars -
        Click here to enlargeClick here to enlargeClick here to enlarge
      1. xShadows's Avatar
        xShadows -
        Did ProEFI already protype and get something working exactly like this?

        http://www.bimmerboost.com/showthrea...Our-ProEFI-N54
      1. bigdnno98's Avatar
        bigdnno98 -
        Pro-EFI hasn't really gotten anything working yet LOL
      1. lulz_m3's Avatar
        lulz_m3 -
        Click here to enlarge Originally Posted by MDORPHN Click here to enlarge
        Fuel management?

        Neil
        Click here to enlarge Originally Posted by bigdnno98 Click here to enlarge
        This. What's controlling the additional injectors?
        Motec standalone in conjunction with DME from what i recall. But no Motec system exhaust Click here to enlarge
      1. Eleventeen's Avatar
        Eleventeen -
        Click here to enlarge Originally Posted by lulz_m3 Click here to enlarge
        Motec standalone in conjunction with DME from what i recall. But no Motec system exhaust Click here to enlarge
        Well, if they had to, they could overnight parts from Japan.
      1. I6+TT=FTW's Avatar
        I6+TT=FTW -
        Click here to enlarge Originally Posted by Eleventeen Click here to enlarge
        Well, if they had to, they could overnight parts from Japan.
        I'd rep you for that if I had the points. Click here to enlarge
      1. uniter's Avatar
        uniter -
        That mani looks pretty.
        If you get 50 people lined up for the defivfab one it'll get made with a fuel controller that's only a few hundred.
      1. rader1's Avatar
        rader1 -
        Kaizenspeed's single turbo made ~600whp IIRC and they tune using the AP. Not sure if they're using a megasquirt or split second fuel controller or something similar to drive the injectors.
      1. mjmarovi's Avatar
        mjmarovi -
        Click here to enlarge Originally Posted by rader1 Click here to enlarge
        Kaizenspeed's single turbo made ~600whp IIRC and they tune using the AP. Not sure if they're using a megasquirt or split second fuel controller or something similar to drive the injectors.
        600whp? on full e85? If not on full e85 and that is the best they've done then I don't see the improvement...