1992 E36 320 engine tune

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  1. 1992 E36 320 engine tune 
    #1
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    Hi all!
    I just bought my first BMW-an E36 320 and I checked all the threads but found no advice on how to tune this model.
    I'd like to gain more power-I will have it chipped and I am intend to get a straight trough exhaust system.
    My question is:
    -how to gain power without installing a supercharger?
    (getting a 325 engine is not an option right now)
    Thanks
     
     

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    hi mate

    i've got a 1992 320, the previous owner (good friend of mine) had it remapped.

    had it dyno'd before and after, and it made an extra 25bhp, and then 30 with the backbox leak fixed.

    i've also stuck on a cold air intake with heatshield. not much of a power upgrade, the biggest difference was the sound. it ROARS.

    with the straight pipe exhaust, i think it'd be too loud, but i've been thinking the same thing. currently got the stock exhaust system on, but it's too restrictive, so i'm looking for an upgrade too.

    we've also got the m50 manifold which 323/325/328 people put on to make more power.

    apart from m3 cams and lightweight pulleys i'd say theres not much more power to be made.
     
     

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    I thought remapping doesn't make much difference on N/A engines, might be wrong.
    I was looking at chips for around 50quid and me and a friend of mine will do the exhaust.
    So basically the 325 intake manifold would fit without any hassle?
    I read that the 328i has the 320manifold and it restricts it alright.
    What about a bit of a port polish?Does it worth the effort?
     
     

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    A 325 manifold would not do anything to a 320. The ports in the cylinder head are much smaller than the ports on the 325 manifold, it would resitrict the airflow when it reaches the head.
    The 320 manifold is visually the same as the 325 but the internal diameter is much smaller. So it would be a waste of money as you will never be able to take enough metal away in the head to match the head to the inlet manifold...
    A chip will not give you 25bhp, it will make the car more responsive and a bit more willing to rev..
     
     

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    Cheers mate, just as I suspected
    So my best bet would be a chip direct air with heat shield, exhaust and a polished intake and cyl head?
     
     

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    Quote Originally Posted by Greyfoot View Post
    Cheers mate, just as I suspected
    So my best bet would be a chip direct air with heat shield, exhaust and a polished intake and cyl head?
    Yeah, I wouldnt bother polishing the head on a 320 as it will be a lot of money for little gain, bear in mind that the head will have to be removed and a new head set would be needed.
    Like I said before, a chip will not give you loads of power but along with a good induction kit and heatshield will make it more throttle responsive Avoid the cheap Ebay ones like the plague. A proper chip from a proper company will cost you at least £150.
    Unfortuntly you wont get good gains from a 320 engine...

    If you dont mind me asking, how much are you planning to spend on this?..
     
     

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    Quote Originally Posted by Greyfoot View Post
    I thought remapping doesn't make much difference on N/A engines, might be wrong.
    I was looking at chips for around 50quid and me and a friend of mine will do the exhaust.
    So basically the 325 intake manifold would fit without any hassle?
    I read that the 328i has the 320manifold and it restricts it alright.
    What about a bit of a port polish?Does it worth the effort?
    the remap that the p/o had was near the 300quid mark

    Quote Originally Posted by steve23002 View Post

    <snip>

    A chip will not give you 25bhp, it will make the car more responsive and a bit more willing to rev..
    i was very sceptical too when i heard this, but i've seen all the dynos etc. i'll try and find them and post 'em up. also the m50 engine responds very well to chips/FI

    Quote Originally Posted by Greyfoot View Post
    Cheers mate, just as I suspected
    So my best bet would be a chip direct air with heat shield, exhaust and a polished intake and cyl head?
    remap, cold air intake/headshield, exhaust would be the best options
     
     

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    Quote Originally Posted by SimonSingh View Post

    i was very sceptical too when i heard this, but i've seen all the dynos etc. i'll try and find them and post 'em up. also the m50 engine responds very well to chips/FI
    If you can get me the results Simon, Ill believe it mate...
    I have a 325 with an M50 engine and have a chip in it The chip was done by one of the Uks BMW gurus. Nowhere near 25bhp...
     
     

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    Oh well I might not bother with it, the car has 130k miles but the engine is spot on.No leaks no noise even when its cold the guy I bought it from was the 2nd owner from new-spared nothing.
    I go for the engine swap then its a lot more easier and cheaper I guess given I could sell the old engine.
    I have a a few hundred alright but the winter is coming up so I think I'll buy a M50B25 and I start working on the engine itself for a few months and then around march I'll stick it in.
    Guess it'll make some sad and surprised faces among them boy racers
    with vti hondas
     
     

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    Quote Originally Posted by Greyfoot View Post
    Oh well I might not bother with it, the car has 130k miles but the engine is spot on.No leaks no noise even when its cold the guy I bought it from was the 2nd owner from new-spared nothing.
    I go for the engine swap then its a lot more easier and cheaper I guess given I could sell the old engine.
    I have a a few hundred alright but the winter is coming up so I think I'll buy a M50B25 and I start working on the engine itself for a few months and then around march I'll stick it in.
    Guess it'll make some sad and surprised faces among them boy racers
    with vti hondas
    That is exactly what I was going to suggest...
    For what you would pay for a chip, induction kit, polishing etc, you can pick up a complete 325 lump now and get an extra 50bhp and a load more torque straight away. MPG is better as well
    You would not get that with the other mods...
     
     

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