1993 E36 320i - tuning - Page 2

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    #11
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    TheEnd's Car Details
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    The 320 is an M50 too.

    The M50 came in 325 and 320s, and after about 1996, the newer updated M52 came out.
    There was a 320 M52 but fairly rare, the 323 was just a 170bhp 2.5, and the 328 was 2.8 litres, but held back to just about the old 325.

    There is differences between the 320 and 325 intake manifolds, but the port in the head are different sizes. The bigger 325 one will fit, but it'll have a step just as the air enters the cylinders to duct down to the smaller port size.
     
     

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    #12
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    Quote Originally Posted by TheEnd View Post
    The 320 is an M50 too.

    The M50 came in 325 and 320s, and after about 1996, the newer updated M52 came out.
    There was a 320 M52 but fairly rare, the 323 was just a 170bhp 2.5, and the 328 was 2.8 litres, but held back to just about the old 325.

    There is differences between the 320 and 325 intake manifolds, but the port in the head are different sizes. The bigger 325 one will fit, but it'll have a step just as the air enters the cylinders to duct down to the smaller port size.
    could i get around this problem by port matching the head to the mani or will i just not gain enough to make it worth it

    i have been doing a little reading up and as far as i can tell mine is a m50b20tu i think if i got that right lol, so would you recomend i just stick with the inlet i have for the mo until i have the readies to make a custom one or get the 325i inlet and port match my head so i have smooth air/fuel transfer from inlet to head
    e46 318i se
     
     

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    #13
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    I think you might be better sticking with what you have,
    You could do some headwork, but that means head off, new HG, and all the associated parts, with the addition of the bigger 325 manifold, you've already spent more than the price of the 325 engine complete.

    M50B20TU should be right, M50, B for Benzin (as in petrol) 2.0 litre, and the TU is Technical Update to signify the addition of the Vanos cam timing from the earlier non Vanos engine.
     
     

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    #14
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    ahhhhh ok well i will bare it in mind for the future should i get bored of it lol

    think i will get it chipped or re-mapped see if i can get that flat spot ironed out and see about some other little mods to get a few extra ponies

    and before anyone suggests just go and buy a 325 or 328 i had the choice when i bought this and i decided i wanted to be different and do things a little different from the norm lol
    e46 318i se
     
     

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    #15
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    Hi!

    Can you tell what you-ve already done to the engine for that extra 10hp?

    Thanks!
     
     

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    #16
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    if you want circa 200bhp your easiest and cheapest bet is to get a 325 engine in there,40bhp is a HUGE leap in NA terms without serious modifications,changing a manifold etc is not going to get you there.100bhp/litre is a fair amount,e36 m3 non evo doesnt even produce that amount.
     
     

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    #17
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    i have just changed from a 320 to the 325 and i didn't notice to much difference in the acceleration probably due to the rear tyres having not much grip in the cold. i still have the 320 and the maf and intake pipes are smaller in diameter as i tried to swap the intake boot over today as the one on the 325 has a split in it and makes the idle erratic.
    i have a full decat on the 320 which gives a good sound but the power is down as i don't think it is fueling enough. tried to get a chip to sort it out and as it is the siemens ecu no one i can find does one, hence the change to the 325 as i wanted more power. my 320 is a 94 and the 325 is a 93.
     
     

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    #18
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    m3 diff = lsd

    but why dont you just drop a 328 engine in.......much more cost effective and full of torque.
     
     

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    #19
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    200 bhp from a 320i isn't going to happen - that's 100 bhp per litre, i.e no chance! The ports are too small (and the 2.5/2.8 head doesn't fit) and the cams are way too tame.
    Just drop a 328i engine in.
     
     

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    #20
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    i got the same car as you bud let me know how u got on ive seen on hear somewhere , the exhaust manifolds of the 325 bolt straight on n help a little ?
     
     

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