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  1. #26
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    TurboBullet that picture doesn't show the fin design at all..please post much better closeups if you can..

    Big Tom fmic has exactly the design I was looking for from a fin pack internally, least pressure drop, as I'm running meth all the time and key for me is to reduce pressure drop...question is how much of that gain is reduced with it suboptimal end tank design
    Click here to enlarge

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    2 out of 2 members liked this post. Reputation: Yes | No
    I just ordered the new AA Sport FMIC. Hopefully we can start seeing some numbers from it once orders start arriving.

  3. #28
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    JHOOPS, take a closeup photo of the inner and outer fins when you get it please and post it up
    Click here to enlarge

  4. #29
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    Will do, unless someone beats me to it first.

  5. #30
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    Here is a link to the group-buy that has some pics of it. Not any real good head on angles, but it looks like a pretty solid unit. I'm excited to get it bolted up in time for the warm weather to start moving in.

    http://www.1addicts.com/forums/showthread.php?t=625503

  6. #31
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    Ya those are way too far out to see what the fins are like ...needs to be a real closeup
    Click here to enlarge

  7. #32
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    Click here to enlarge Originally Posted by dzenno Click here to enlarge
    TurboBullet that picture doesn't show the fin design at all..please post much better closeups if you can..

    Big Tom fmic has exactly the design I was looking for from a fin pack internally, least pressure drop, as I'm running meth all the time and key for me is to reduce pressure drop...question is how much of that gain is reduced with it suboptimal end tank design
    If you click on the pic it blows the pic up! Yeah as far as meth injection goes I have known guys that totally gotten rid of their fmics and ran several jets strategically spaced before and after the turbo with success. On a side note I need to speak w u in pm about the Cobb maps as rob is doing mine now if that's ok?

  8. #33
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    Click here to enlarge Originally Posted by TurboBullett Click here to enlarge
    If you click on the pic it blows the pic up!
    If you can do a closeup like this that's what would be a good closeup to see the fins...if/when you can of course...
    Click here to enlarge

    At work in meetings for another 1.5-2 hours but i can probably respond to PMs no problem Click here to enlarge
    Click here to enlarge

  9. #34
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    Click here to enlarge Originally Posted by TurboBullett Click here to enlarge
    If you click on the pic it blows the pic up! Yeah as far as meth injection goes I have known guys that totally gotten rid of their fmics and ran several jets strategically spaced before and after the turbo with success.
    I wanted to do that and people were calling me crazy...
    Some people live long, meaningful lives.

    Other people eat shit and die.

    I'm not racist, I hate everybody equally; especially fat people.


    Click here to enlarge

  10. #35
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    Click here to enlarge Originally Posted by DBFIU Click here to enlarge
    I wanted to do that and people were calling me crazy...
    Not sure that is a great idea as you'd still get the initial hot IAT hit to the engine before it gets the chance to cool down due to velocity of the charge...by the time the meth pump is on and meth reaches the nozzles you'd probably already shoving air at 250F into the engine and with the N54 that'd be at peak boost down low...don't know about that..
    Click here to enlarge

  11. #36
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    Click here to enlarge Originally Posted by JHOOPS2 Click here to enlarge
    Here is a link to the group-buy that has some pics of it. Not any real good head on angles, but it looks like a pretty solid unit. I'm excited to get it bolted up in time for the warm weather to start moving in.

    http://www.1addicts.com/forums/showthread.php?t=625503
    Rather than link there you could post the photos here...

  12. #37
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    Click here to enlarge Originally Posted by dzenno Click here to enlarge
    Not sure that is a great idea as you'd still get the initial hot IAT hit to the engine before it gets the chance to cool down due to velocity of the charge...by the time the meth pump is on and meth reaches the nozzles you'd probably already shoving air at 250F into the engine and with the N54 that'd be at peak boost down low...don't know about that..
    Thats why I would start the injection at 5 psi.
    Some people live long, meaningful lives.

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  13. #38
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    Click here to enlarge Originally Posted by DBFIU Click here to enlarge
    Thats why I would start the injection at 5 psi.
    Even then I really think you'd probably not be very safe as you've already delivered enough really hot air to the engine...probably wouldn't affect anything but...

    In any case, methanol kits/pumps/fittings are just too unreliable to run something like that on its own without at least some air-air intercooling IMHO
    Click here to enlarge

  14. #39
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    Click here to enlarge Originally Posted by dzenno Click here to enlarge
    Even then I really think you'd probably not be very safe as you've already delivered enough really hot air to the engine...probably wouldn't affect anything but...

    In any case, methanol kits/pumps/fittings are just too unreliable to run something like that on its own without at least some air-air intercooling IMHO
    Thats why I want someone else to try it first... Haha..
    Some people live long, meaningful lives.

    Other people eat shit and die.

    I'm not racist, I hate everybody equally; especially fat people.


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    1 out of 1 members liked this post. Reputation: Yes | No
    Click here to enlarge Originally Posted by dzenno Click here to enlarge
    TurboBullet that picture doesn't show the fin design at all..please post much better closeups if you can...

    heres some closeups of the Helix Fins(dense staggered offset) and rounded face bars that are used on the ambient face and inside the charge rows of the core. These rounded bars are unique to our core as we have them custom made which adds $ and a few steps to our fabrication process but worth it as air likes to move through rounded vs flat surfaces!

    Click here to enlarge

    Click here to enlarge
    Last edited by TurboBullett; 01-19-2012 at 12:17 PM.

  16. #41
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    Fin design is a fraction of what goes towards efficiency of the core. Measuring just the climb of temps via the IAT sensor is not quite right either - as you need to compare inlet and outlet and the pressure drop.

    Read this
    http://cp-e.com/sites/default/files/files/n54FMIC.pdf

    and this

    http://bimmerboost.com/showthread.ph...rcooler-Design
    Custom Performance Engineering
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    BMW N54/N55 | Forced Induction | Direct Injection Specialists

    Supporting BMW 1M | 135i | 335i | 535i and more

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    1 out of 1 members liked this post. Reputation: Yes | No
    2 Logs: AMS top / Helix bottom. 2 to 4th gear. same car, same mods.
    Attached Images Attached Images  

  18. #43
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    Wow Josh, those are two very different results. Were the ambients identical?

  19. #44
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    As I thought, nothing beats the Helix fmic in terms of IAT control, its the best fmic in that respect for the n54 bar none...

    next thing i'd really like to see is wgdc logs comparing the two...do you have those captured as well Josh?
    Click here to enlarge

  20. #45
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    So AMS went 68-88ish and Helix was 75-82? And he actually backed out earlier on the AMS log.

    Did the Helix log have less data points? It's steps more, and they seem to be around the same duration. Actually, it seems to be because of the Y-axis scaling.

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    Probably two logs taken from two different circumstances.
    It's almost impossible to compare logs, even if they're from the same car.

    Same car, same boost, same time, same road, same ambient temps, same humidity, same speed, same gears, same rpm's and so on.......
    If you manage to synchronize all these variables, then you could compare logs to logs.
    Last edited by Big Tom; 01-20-2012 at 10:29 AM.
    GT-R R35 ​coming up...

  22. #47
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    Click here to enlarge Originally Posted by Big Tom Click here to enlarge
    Probably two logs taken from two different circumstances.
    It's almost impossible to compare logs, even if they're from the same car.

    Same car, same boost, same time, same road, same ambient temps, same humidity, same speed, same gears, same rpm's and so on.......
    If you manage to synchronize all these variables, then you could compare logs to logs.
    Obviously these will never be 100% lab sample quality but good enough as a comparison provided that tune, humidity, ambient temps and barometric pressure are kept relatively close...which isn't that hard really I think

    The notion of an FMIC's IAT "fingerprint" that TurboBullet brought up is actually very interesting...if you take the time to actually look at a number of logs for the same FMIC you can actually see this is fairly true and that the way IAT rises/decays for a given FMIC doesn't really vary much at all even across different N54s and ambient conditions...i actually have done quite a bit of digging and this is surprisingly very true...you can almost market an FMIC based on its fingerprint if all you were interested in was IAT suppression/control...of course, pressure drop can't be ignored either...
    Click here to enlarge

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    Those external variables don't really matter much. You can understand it by trying to explain how and by how much those affect the temperature increase in a pull. You will notice, that it is very difficult to be able to prove them to have any major impact Click here to enlarge

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    AA intercooler FTW Click here to enlarge

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    Click here to enlarge Originally Posted by Tzu Click here to enlarge
    Wow Josh, those are two very different results. Were the ambients identical?
    about 50deg AMS and 65deg Helix, BUT this depends on static time and oil temps which I don't remember.
    Click here to enlarge Originally Posted by dzenno Click here to enlarge
    next thing i'd really like to see is wgdc logs comparing the two...do you have those captured as well Josh?
    Yeah, but I had some issues that could play into skewing the results at the time I changed ICs, but I'll check it out.
    Click here to enlarge Originally Posted by SlicktopTTZ Click here to enlarge
    Did the Helix log have less data points? It's steps more, and they seem to be around the same duration. Actually, it seems to be because of the Y-axis scaling.
    TMAP resolution and y-axis scaling.

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