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    • AEM Infinity or Pro EFI to control a turbo S54? Saad Racing built Precision 6766 turbocharged and Pro EFI controlled E46 M3 S54 shows 667 whp on 11 psi

      The two most popular standalone ECU choices for forced induction BMW E46 M3's are the AEM Infinity and the Pro EFI 128 systems. Saad Racing leans toward the Pro EFI system and this is one of their recent creations. The dynograph below is from an E46 M3 with a Precision 6766 turbocharger on a built motor. On very low boost, 11 psi, the motor shows 667 to the wheels on a Dynojet. On high boost this should be capable of over 900 horsepower to the wheels although BimmerBoost certainly would like to see this car do it.

      The Pro EFI system is doing a great job controlling motor and the AEM Infinity system has shown great results as well. So which is better? It likely depends on what your tuner is most comfortable with as either one is more than capable of handling a turbo E46 M3 S54.

      Undercover racing is going for the S54 horsepower record using a Pro EFI system which is plug and play. The AEM Infinity system is also a plug and play complete ECU and offers features like a three-step rev limiter, traction control, anti-lag, and map switching.. It looks like you can't go wrong with either.


      This article was originally published in forum thread: AEM Infinity or Pro EFI to control a turbo S54? Saad Racing built Precision 6766 turbocharged and Pro EFI controlled E46 M3 S54 shows 667 whp on 11 psi started by Sticky View original post
      Comments 52 Comments
      1. 135idct's Avatar
        135idct -
        the torque curve Click here to enlarge
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by 135idct Click here to enlarge
        the torque curve Click here to enlarge
        It spikes due to the connection probably but just ignore the peak torque figure as it obviously isn't accurate.
      1. leonelhpfm3's Avatar
        leonelhpfm3 -
        Good Job to SAAD Racing for there commitment thus far and Undercover Racing for pushing the envelope.

        I like both systems but ended up with the AEM Infinity-8 because of a deal. I caught it at the right time. I really do not Like the FACT that the AEM system removed the cruise-control but other than that the only real difference is the AEM is a complete ECU that literally replaces our current ECU where the Pro-efi is a HUGE piece that takes over the P/S area (opposite from the ECU)

        YOU REALLY CAN NOT LOSE WITH EITHER!

        Looking forward to Under cover racings product!!
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by leonelhpfm3 Click here to enlarge
        Good Job to SAAD Racing for there commitment thus far and Undercover Racing for pushing the envelope.

        I like both systems but ended up with the AEM Infinity-8 because of a deal. I caught it at the right time. I really do not Like the FACT that the AEM system removed the cruise-control but other than that the only real difference is the AEM is a complete ECU that literally replaces our current ECU where the Pro-efi is a HUGE piece that takes over the P/S area (opposite from the ECU)

        YOU REALLY CAN NOT LOSE WITH EITHER!

        Looking forward to Under cover racings product!!
        The AEM replacing everything is pretty impressive.

        They are both good systems but the AEM ECU seems to be more capable as a full standalone as the Pro EFI still requires the factory DEM. The infinity is also newer though.
      1. SpeedLimit?'s Avatar
        SpeedLimit? -
        I don't get how people are on the infinity bandwagon without any proven performance compared to ProEFI with multiple platforms making big #'s and performing great. Last I heard AEM is playing catchup for all the things ProEFI has sorted out(e85, TC, etc.)
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by SpeedLimit? Click here to enlarge
        I don't get how people are on the infinity bandwagon without any proven performance compared to ProEFI with multiple platforms making big #'s and performing great. Last I heard AEM is playing catchup for all the things ProEFI has sorted out(e85, TC, etc.)
        You can't fault a product because it is newer.
      1. SpeedLimit?'s Avatar
        SpeedLimit? -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        You can't fault a product because it is newer.
        Of course you can. If it's a direct competitor to something already established you're effectively throwing your product into the fire and better be ready. It's the nature of the game.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by SpeedLimit? Click here to enlarge
        Of course you can. If it's a direct competitor to something already established you're effectively throwing your product into the fire and better be ready. It's the nature of the game.
        So you're punishing a product for being new?
      1. SpeedLimit?'s Avatar
        SpeedLimit? -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        So you're punishing a product for being new?
        What punishment? Just deserved scrutiny...ProEFI is on top right now and AEM has a lot to prove before reclaiming that spot(this is of course excluding MoTec, Syvecs, etc. who aren't as widely used in comparison but are quality systems)
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by SpeedLimit? Click here to enlarge
        What punishment? Just deserved scrutiny...ProEFI is on top right now and AEM has a lot to prove before reclaiming that spot(this is of course excluding MoTec, Syvecs, etc. who aren't as widely used in comparison but are quality systems)
        How can something that is newer have the same library of results as something that is older that by default has the benefit of more years of use? Yes, Pro EFI works well and has more results than the AEM Infinity but majority doesn't equal better.
      1. SpeedLimit?'s Avatar
        SpeedLimit? -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        How can something that is newer have the same library of results as something that is older that by default has the benefit of more years of use? Yes, Pro EFI works well and has more results than the AEM Infinity but majority doesn't equal better.
        Isn't that the same as saying the AEM is unproven? Which was my original statement.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by SpeedLimit? Click here to enlarge
        Isn't that the same as saying the AEM is unproven? Which was my original statement.
        But it has shown some good results and it is fully plug and play...
      1. SpeedLimit?'s Avatar
        SpeedLimit? -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        But it has shown some good results and it is fully plug and play...
        Where are these results?!
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by SpeedLimit? Click here to enlarge
        Where are these results?!
        Don't the Lab22 cars use the AEM Infinity and wasn't a custom one off AA M3 retuned using it?
      1. SpeedLimit?'s Avatar
        SpeedLimit? -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Don't the Lab22 cars use the AEM Infinity and wasn't a custom one off AA M3 retuned using it?
        Is there anything out there on them? Do those results come close to anything seen from ProEFI?
      1. benzy89's Avatar
        benzy89 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        You can't fault a product because it is newer.
        But you can fault it for having less features & accolades. Similar to Syvecs in the US being very new & not having a lot of "bragging rights"..... I mean, the Alpha Omega car is a completely purpose build setup with every component focused on the track, and then it got beat by a full interior COBB tuned car

        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Don't the Lab22 cars use the AEM Infinity and wasn't a custom one off AA M3 retuned using it?
        Yes, Lab22 uses the Infinity in their builds. Obviously Marcus' car is their marketing "flagship", but that cars gone through so many revisions and rebuilds that it's hard to compare the original setup (HPF kit/HPF tune), to the Saad setup (motor rebuild/ProEFI/biggest turbo/low compression) & the current Lab22 setup (motor rebuild with higher CR/AEM Infinity/smaller turbo).
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by SpeedLimit? Click here to enlarge
        Is there anything out there on them? Do those results come close to anything seen from ProEFI?
        I haven't seen too much on them to be honest I just thought they used it. I'm pointing out it seems you can do well with either.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by benzy89 Click here to enlarge
        But you can fault it for having less features & accolades. Similar to Syvecs in the US being very new & not having a lot of "bragging rights"..... I mean, the Alpha Omega car is a completely purpose build setup with every component focused on the track, and then it got beat by a full interior COBB tuned car
        You're a little all over the place here but does it have less features? Does it have different features? Do they each possibly offer something the other does not?
      1. benzy89's Avatar
        benzy89 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        You're a little all over the place here but does it have less features? Does it have different features? Do they each possibly offer something the other does not?
        Well I'm not sure, but the "standard" standalone features (boost by gear, anti lag from a stop) are probably from the Pectel & Motec camp. But ProEFI was pioneered true FlexFuel, the aftermarket TC via ignition, rolling anti-lag, VE tuning, and they also have some of the best safety features (like automatically adding fuel in lean/underperforming conditions, programmable safety limp modes, etc).

        None of them are "bad" products, but with ProEFI you're getting a product that has several records on several platforms & at an excellent price point.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by benzy89 Click here to enlarge
        Well I'm not sure, but the "standard" standalone features (boost by gear, anti lag from a stop) are probably from the Pectel & Motec camp. But ProEFI was pioneered true FlexFuel, the aftermarket TC via ignition, rolling anti-lag, VE tuning, and they also have some of the best safety features (like automatically adding fuel in lean/underperforming conditions, programmable safety limp modes, etc).

        None of them are "bad" products, but with ProEFI you're getting a product that has several records on several platforms & at an excellent price point.
        But the ProEFI requires the stock DME?