2000 E46 323Ci - Adding bhp to 323ci - Page 2

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    Yeah, the M3 just looks a different class compared to any other E46 and no doubt is in a different class performance wise. Am definitely leaning towards the M3 at present. There's an estrol blue one round the corner from me and it just looks so much better than the normal E46.
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    #12
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    Vaux fan I Didnt mean use a E36 Manifold.I meant a E46 325 manifold as that is the model he has.I was led to believe that A E46 323 engine is the same as the 325(E46 of the same year) but fitted with a restrictive manifold for the purpose of detuning it.

    Im sure iv seen posts of others doing the swop on here.
     
     

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    #13
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    Quote Originally Posted by jamesbal4 View Post
    How do you add bhp to a e46 2000 323ci, without adding a superchager?
    I have an e46 323ci and have just done the inlet manifold swap from a 325.The mod cost me around 250 euro and 8 hours of my time. My car has not been on a dyno but there is a big difference in the power after 4000rpm the engine revs alot more freely to the red line .Torque feels about the same ,bhp feels like an extra 15-20 but all after 4000rpm. I definitely think this mod is well worth doing

    parts needed: 1) M54 325 manifold (with DISA)
    2) Throttle Body adapter plate http://www.turnermotorsport.com/html..._ID=TEN9990850
    3) manifold gasket
     
     

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    #14
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    Quote Originally Posted by jmafitzy View Post
    I have an e46 323ci and have just done the inlet manifold swap from a 325.The mod cost me around 250 euro and 8 hours of my time. My car has not been on a dyno but there is a big difference in the power after 4000rpm the engine revs alot more freely to the red line .Torque feels about the same ,bhp feels like an extra 15-20 but all after 4000rpm. I definitely think this mod is well worth doing

    parts needed: 1) M54 325 manifold (with DISA)
    2) Throttle Body adapter plate http://www.turnermotorsport.com/html..._ID=TEN9990850
    3) manifold gasket
    thats basically the same as the 330 manifold with all the extra bits, i was under the impresion that the jury was still out on that working or adding hp?
    the 2.5 and 323 engines are very different, the 323 and 328s are the same m52tu's and the 325 and 330s are the m54s, although the other 323 and 325 are 2.5s, thats the only thing they share,, in size only! the 323 is a detuned version of the 2.8, or the 328 is a stroked version of the 323 if you like.
     
     

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    #15
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    Hi vauxfan
    you can use either manifold but from the research i have done it seems the 330 manifold is more suited to the 328 .One of the main differences between these two engines is the throttle body set ups . The m52tu 323 and 328 use a cable operated throttle body which is smaller in diameter to the drive by wire setups on the m54 325 and 330 you also need a different adapter plate if you use the 330 manifold which you can get here http://www.too-much-concepts.de/.Here are some pictures to show the difference between the two manifolds .The inlet tracts on the 323 manifold are oval and smaller than the d-shaped ones on the 325 manifold also on the cylinder head the ports are d-shaped and the gasket is the same for both manifolds.It seems that one of the ways that bmw detuned this engine was to strangle it at the inlet manifold and smaller throttle body.This swap helps to reclaim some of that power.
    I was skeptical too but i could not be happier with the results.
    Attached Images
     
     

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    #16
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    Quote Originally Posted by jmafitzy View Post
    Hi vauxfan
    you can use either manifold but from the research i have done it seems the 330 manifold is more suited to the 328 .One of the main differences between these two engines is the throttle body set ups . The m52tu 323 and 328 use a cable operated throttle body which is smaller in diameter to the drive by wire setups on the m54 325 and 330 you also need a different adapter plate if you use the 330 manifold which you can get here http://www.too-much-concepts.de/.Here are some pictures to show the difference between the two manifolds .The inlet tracts on the 323 manifold are oval and smaller than the d-shaped ones on the 325 manifold also on the cylinder head the ports are d-shaped and the gasket is the same for both manifolds.It seems that one of the ways that bmw detuned this engine was to strangle it at the inlet manifold and smaller throttle body.This swap helps to reclaim some of that power.
    I was skeptical too but i could not be happier with the results.
    Be interesting to see what the actual output difference is, without any subjectivity or emotion etc. Rolling road I guess. I am happy with my 323 overall but i like tinkering, and something about this and the vanos seals change floats my boat.
     
     

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    Quote Originally Posted by jmafitzy View Post
    Hi vauxfan
    you can use either manifold but from the research i have done it seems the 330 manifold is more suited to the 328 .One of the main differences between these two engines is the throttle body set ups . The m52tu 323 and 328 use a cable operated throttle body which is smaller in diameter to the drive by wire setups on the m54 325 and 330 you also need a different adapter plate if you use the 330 manifold which you can get here http://www.too-much-concepts.de/.Here are some pictures to show the difference between the two manifolds .The inlet tracts on the 323 manifold are oval and smaller than the d-shaped ones on the 325 manifold also on the cylinder head the ports are d-shaped and the gasket is the same for both manifolds.It seems that one of the ways that bmw detuned this engine was to strangle it at the inlet manifold and smaller throttle body.This swap helps to reclaim some of that power.
    I was skeptical too but i could not be happier with the results.
    so are u using the 325 manifold? what exactly have you used to get that to fit?
    the main reason i mentioned the e36 is that thats the model you get big power from the swap!, i'm in no dought that with the e46 325 manifold there is scope to get a few more horses, a filter and a remap will make the most of this though, but i had heard about the 330 swap before, but not the gains seen with the e36,, but good find and intresting!!!

    M54 INTAKE MANIFOLD - The intake manifold is modified with shorter ram tubes (20mm
    shorter on 3 liter/10mm shorter on 2.5 liter). The diameter of the tubes is increased
    slightly.

    m52TU Resonance/Turbulence Intake System
    The intake manifold for the M52 TU engine was completely redesigned. Manufactured from
    molded plastic, it contained several new innovations and features.
    Resonance Charging
    The principle of resonance charging is carried over from the M42 engine. The design of the
    manifold and the use of the resonance charging flap allow the manifold to operate with the
    dynamic effect of long intake runners at low to mid range RPM. Then, when the resonance
    flap opens during higher RPM, the dynamic effect is to have six short intake runners for
    greater air volume.
    The overall effect is to achieve an optimum torque progression throughout the entire RPM
    range.
     
     

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    #18
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    [QUOTE=vauxfan;565936]so are u using the 325 manifold? what exactly have you used to get that to fit?
    the main reason i mentioned the e36 is that thats the model you get big power from the swap!, i'm in no dought that with the e46 325 manifold there is scope to get a few more horses, a filter and a remap will make the most of this though, but i had heard about the 330 swap before, but not the gains seen with the e36,, but good find and intresting!!!:thumbs up

    Hi i used the 325 manifold it bolts straight on . You need the adapter plate to get the 323 throttle body to fit on the 325 manifold every thing else is a direct swap over.I have heard of a 330 swap on to a 325 with no power gains .I agree i think a remap will diffo get the most from this mod but as i live in ireland i am very limited in my choices.
     
     

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    #19
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    Quote Originally Posted by bmwmike View Post
    Be interesting to see what the actual output difference is, without any subjectivity or emotion etc. Rolling road I guess. I am happy with my 323 overall but i like tinkering, and something about this and the vanos seals change floats my boat.
    Hi bmwmike i will be doing my vanos seals sometime over the holidays i will let you now how i get on .I will be following this: beisansystems.com/procedures/vanos_procedure.htm hopefully i wont run in to too much trouble.

    Ps do all BMW owners think alike
     
     

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    being plastic, can't you just use a die grinder and open the intake port holes alittle? you would get the same results surely. looks about a couple of hp max i would have thought! especially when the 323s restriction is in the stroke!
     
     

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