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    • Boost isn't the only way to make power - A look at Twisted Tuning's N54 direct port nitrous injection sytem

      Since modern BMW performance motors are turbocharged pretty much everyone adds power by increasing boost and searching out turbo upgrades which can move a lot more air. Nitrous is discounted and has a stigma attached to it but there are many benefits.


      For one, it's cheap. At least compared to a proper turbo upgrade. Secondly, it is density altitude in a bottle. What that means is nitrous oxide provides a cooling effect:

      Cooler intake air is denser and therefore contains more oxygen, which will allow more fuel to be burned and in turn make more power. Just a 10 degree drop in temperature has the potential to increase an engines power by up to 1.5%. Nitrous oxide boils at -129°F and it begins to do that as soon as it’s injected into the intake manifold. To boil, the nitrous has to absorb heat from the intake charge and in so doing has the potential to reduce the intake air temperature by up to 80°, which means that if we were dealing with say a 400 hp engine, we could see a gain of over 30 hp from the cooling effect alone and as a bonus, this cooling effect also helps the engine stay below the detonation threshold.

      Activating a NOS nitrous oxide system adds nitrous oxide & fuel to the original inlet charge and although the nitrous oxide itself does not burn, it is an oxidiser which provides more oxygen to allow the additional fuel to be burned, and therefore produce more power. At 565 degrees F (less than the temperatures of normal combustion), the molecules of nitrous oxide break down, releasing the oxygen atoms from the nitrogen atoms. Once free from the nitrogen, the oxygen supports the combustion of the additional fuel, while the released nitrogen suppresses detonation. The increased amount of oxygen & fuel in the combustion chamber results in the assorted molecules being more tightly packed than normal, which leads to a quicker burn rate, that requires less timing advance for optimum results. Without retarding the timing appropriately, the quicker burn rate would cause peak cylinder pressure to occur too soon and this would lead to detonation and engine damage.
      There are of course variables depending on the fuel octane, amount of nitrous injected, how it is injected, how it is tuned for, bottle pressure, etc.

      Twisted Tuning provides a direct port nitrous system which while more expensive than your basic wet or dry kit maintains even nitrous distribution to each cylinder. Do you want to do it right or save a few bucks?

      Check out their results on a 335i. Yes, they used a virtual dyno (get it on a real dyno) but it is nice to see different BMW tuning approaches:


      A little something different for the masses that you don't see too often on the N54 is nitrous injection. There are turbo upgrades out of the Whoo-hah, but we wanted to do something different and go against the grain with this particular 335xi.

      Setup designed by us here at Twisted Tuning, some probably have seen our Direct port Meth injection setups.

      Moving forward, last night we finally got around to starting to tune the car on the bottle.

      2007 335xi - Stock Turbos, VSRF 5" stepped Intercooler, DCIs,VSRF Chargepipe, Direct Port Nitrous. Fuel is E40 and this is on a 50 shot with partially reduced timing (mainly reduced from target timing on or E40 map without the bottle) and about 19-20psi peak from the stock twin.

      This was generated from a log from the first full pass, after the initial setup. so more tuning and more power to be had when its all said and done. Starting out great though.

      We will post more updates as we progress through the tuning side of things. Then hit the rollers for final numbers. We are thinking about shooting for a respectable 600whp on the bottle after we toss on a set of catless downpipes.

      This article was originally published in forum thread: Twisted Tuning Direct Port Nitrous Injection Plate started by TwistedTuning View original post
      Comments 13 Comments
      1. R.G.'s Avatar
        R.G. -
        When do you guys think you'll be putting this piece to use? Would love to see how you guys mount the full kit, tank options, triggers and results.
        I know the JB4 was modified way back in the day by a few members to trigger N20 as well.
      1. Sticky's Avatar
        Sticky -
        The link doesn't take you to a product page?
      1. R.G.'s Avatar
        R.G. -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        The link doesn't take you to a product page?
        You talking to me maign? Sure it does.
        I want to see the vehicle set up that will be tuned for N20
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by R.G. Click here to enlarge
        You talking to me maign? Sure it does.
        I want to see the vehicle set up that will be tuned for N20
        It works now, weird:

        Click here to enlarge
      1. TwistedTuning's Avatar
        TwistedTuning -
        getting there. been so busy with other projects, install has gone slow.....

        Click here to enlargeTwisted Tuning Direct Port Nitrous by Justin Whitted, on Flickr
      1. AWSAWS's Avatar
        AWSAWS -
        As someone who knows nothing about Nitrous I can say it scares me but I watch shows like Street outlaws where they are pushing stuff way past the limits. Would love to see the results on a well setup N54
      1. TwistedTuning's Avatar
        TwistedTuning -
        Click here to enlarge Originally Posted by AWSAWS Click here to enlarge
        As someone who knows nothing about Nitrous I can say it scares me but I watch shows like Street outlaws where they are pushing stuff way past the limits. Would love to see the results on a well setup N54

        Yea, lots of people seem to be a little weary of Nitrous. but fact is, if setup properly and you don't get greedy. Nitrous is no more dangerous than turbo upgrades and pushing them. Just have to be smart. And not cut corners.

        I've had nitrous and boost one of my other shop cars for almost 7 years, lol. No issues

        Click here to enlarge2017-04-01_10-24-52 by Justin Whitted, on Flickr

        Click here to enlarge2017-04-01_10-23-58 by Justin Whitted, on Flickr

        Click here to enlarge2017-04-01_10-23-19 by Justin Whitted, on Flickr

        Also Twin Turbo btw.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by AWSAWS Click here to enlarge
        As someone who knows nothing about Nitrous I can say it scares me but I watch shows like Street outlaws where they are pushing stuff way past the limits. Would love to see the results on a well setup N54
        It's all about pairing the right setup to your motor. Viper guys run 500 shots.
      1. TwistedTuning's Avatar
        TwistedTuning -
        A little something different for the masses that you don't see too often on the N54 is nitrous injection. There are turbo upgrades out of the Whoo-hah, but we wanted to do something different and go against the grain with this particular 335xi.

        Setup designed by us here at Twisted Tuning, some probably have seen our Direct port Meth injection setups.

        Moving forward, last night we finally got around to starting to tune the car on the bottle.

        2007 335xi - Stock Turbos, VSRF 5" stepped Intercooler, DCIs,VSRF Chargepipe, Direct Port Nitrous. Fuel is E40 and this is on a 50 shot with partially reduced timing (mainly reduced from target timing on or E40 map without the bottle) and about 19-20psi peak from the stock twin.

        This was generated from a log from the first full pass, after the initial setup. so more tuning and more power to be had when its all said and done. Starting out great though...

        Click here to enlargeJustin Nitrous Pull v1 by Justin Whitted, on Flickr

        Pic of the setup with the IM off....

        Click here to enlargeTwisted Tuning Direct Port Nitrous by Justin Whitted, on Flickr

        And the car....

        Click here to enlargeTwisted Tuning's N54 by Justin Whitted, on Flickr

        Click here to enlargeTwisted Tuning's N54 by Justin Whitted, on Flickr


        We will post more updates as we progress through the tuning side of things. Then hit the rollers for final numbers. We are thinking about shooting for a respectable 600whp on the bottle after we toss on a set of catless downpipes.
      1. Sticky's Avatar
        Sticky -
        Since modern BMW performance motors are turbocharged pretty much everyone adds power by increasing boost and searching out turbo upgrades which can move a lot more air. Nitrous is discounted and has a stigma attached to it but there are many benefits.

        Click here to enlarge

        For one, it's cheap. At least compared to a proper turbo upgrade. Secondly, it is density altitude in a bottle. What that means is nitrous oxide provides a cooling effect:

        Cooler intake air is denser and therefore contains more oxygen, which will allow more fuel to be burned and in turn make more power. Just a 10 degree drop in temperature has the potential to increase an engines power by up to 1.5%. Nitrous oxide boils at -129°F and it begins to do that as soon as it’s injected into the intake manifold. To boil, the nitrous has to absorb heat from the intake charge and in so doing has the potential to reduce the intake air temperature by up to 80°, which means that if we were dealing with say a 400 hp engine, we could see a gain of over 30 hp from the cooling effect alone and as a bonus, this cooling effect also helps the engine stay below the detonation threshold.

        Activating a NOS nitrous oxide system adds nitrous oxide & fuel to the original inlet charge and although the nitrous oxide itself does not burn, it is an oxidiser which provides more oxygen to allow the additional fuel to be burned, and therefore produce more power. At 565 degrees F (less than the temperatures of normal combustion), the molecules of nitrous oxide break down, releasing the oxygen atoms from the nitrogen atoms. Once free from the nitrogen, the oxygen supports the combustion of the additional fuel, while the released nitrogen suppresses detonation. The increased amount of oxygen & fuel in the combustion chamber results in the assorted molecules being more tightly packed than normal, which leads to a quicker burn rate, that requires less timing advance for optimum results. Without retarding the timing appropriately, the quicker burn rate would cause peak cylinder pressure to occur too soon and this would lead to detonation and engine damage.
        There are of course variables depending on the fuel octane, amount of nitrous injected, how it is injected, how it is tuned for, bottle pressure, etc.

        Twisted Tuning provides a direct port nitrous system which while more expensive than your basic wet or dry kit maintains even nitrous distribution to each cylinder. Do you want to do it right or save a few bucks?

        Check out their results on a 335i. Yes, they used a virtual dyno (get it on a real dyno) but it is nice to see different BMW tuning approaches:

        Click here to enlarge

        A little something different for the masses that you don't see too often on the N54 is nitrous injection. There are turbo upgrades out of the Whoo-hah, but we wanted to do something different and go against the grain with this particular 335xi.

        Setup designed by us here at Twisted Tuning, some probably have seen our Direct port Meth injection setups.

        Moving forward, last night we finally got around to starting to tune the car on the bottle.

        2007 335xi - Stock Turbos, VSRF 5" stepped Intercooler, DCIs,VSRF Chargepipe, Direct Port Nitrous. Fuel is E40 and this is on a 50 shot with partially reduced timing (mainly reduced from target timing on or E40 map without the bottle) and about 19-20psi peak from the stock twin.

        This was generated from a log from the first full pass, after the initial setup. so more tuning and more power to be had when its all said and done. Starting out great though.

        We will post more updates as we progress through the tuning side of things. Then hit the rollers for final numbers. We are thinking about shooting for a respectable 600whp on the bottle after we toss on a set of catless downpipes.
      1. BPCMotorsports's Avatar
        BPCMotorsports -
        Kudos for taking the road less traveled.
      1. TwistedTuning's Avatar
        TwistedTuning -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Since modern BMW performance motors are turbocharged pretty much everyone adds power by increasing boost and searching out turbo upgrades which can move a lot more air. Nitrous is discounted and has a stigma attached to it but there are many benefits.


        For one, it's cheap. At least compared to a proper turbo upgrade. Secondly, it is density altitude in a bottle. What that means is nitrous oxide provides a cooling effect:



        There are of course variables depending on the fuel octane, amount of nitrous injected, how it is injected, how it is tuned for, bottle pressure, etc.

        Twisted Tuning provides a direct port nitrous system which while more expensive than your basic wet or dry kit maintains even nitrous distribution to each cylinder. Do you want to do it right or save a few bucks?

        Check out their results on a 335i. Yes, they used a virtual dyno (get it on a real dyno) but it is nice to see different BMW tuning approaches:


        A little something different for the masses that you don't see too often on the N54 is nitrous injection. There are turbo upgrades out of the Whoo-hah, but we wanted to do something different and go against the grain with this particular 335xi.

        Setup designed by us here at Twisted Tuning, some probably have seen our Direct port Meth injection setups.

        Moving forward, last night we finally got around to starting to tune the car on the bottle.

        2007 335xi - Stock Turbos, VSRF 5" stepped Intercooler, DCIs,VSRF Chargepipe, Direct Port Nitrous. Fuel is E40 and this is on a 50 shot with partially reduced timing (mainly reduced from target timing on or E40 map without the bottle) and about 19-20psi peak from the stock twin.

        This was generated from a log from the first full pass, after the initial setup. so more tuning and more power to be had when its all said and done. Starting out great though.

        We will post more updates as we progress through the tuning side of things. Then hit the rollers for final numbers. We are thinking about shooting for a respectable 600whp on the bottle after we toss on a set of catless downpipes.
        thanks Sticky,

        Yea, like i said in the original post car will hit the rollers when im done tuning it to appease onlookers. I'm currently in the middle of finding another RPM tap because the one i used in that pull was a little wonky.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by TwistedTuning Click here to enlarge
        thanks Sticky,

        Yea, like i said in the original post car will hit the rollers when im done tuning it to appease onlookers. I'm currently in the middle of finding another RPM tap because the one i used in that pull was a little wonky.
        No worries, my pleasure. I like seeing people try different things.

        Direct port nitrous deserves more credit anyway.