118d E82- How to get up to 200hp

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  1. 118d E82- How to get up to 200hp 
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    Hi all, I'm a newbie here and just looking for suggestions on how to get my 118d, 143hp, up to or over 200hp. ECU re-map is a given, same with air filter, but what else?

    All suggestions welcome, Thanks!
     
     

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    Remap should give around 180bhp, to gain on that I'd imagine it would start to become rather expensive though..

    Sorry to be stupid mate but if you wanted over 200BHP why did you get a 118d over the 120d or 123d????
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    Quote Originally Posted by baderlfc View Post
    Remap should give around 180bhp, to gain on that I'd imagine it would start to become rather expensive though..

    Sorry to be stupid mate but if you wanted over 200BHP why did you get a 118d over the 120d or 123d????
    circumstances changed, was doing +800 miles every month n wanted whatever fuel economy I could get. What can I say, im Scottish so always counting the pennies. Hence why I want the power now without shelling out for another car
     
     

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    Quote Originally Posted by Robharv View Post
    What can I say, im Scottish so always counting the pennies.
    to that comment!!!!

    I'd say go for remap and stick there mate, that's the best bang for buck mod you can do on any turbo diesel.. from there your shelling out big money for little gain!
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    All three engines are the same capacity, the 123d is twin turbo version.

    You would need to check the turbo set up is the same but the 118d should simply be a de-tuned vesion of the standard 120d engine and so a re-map should give you the 200bhp you desire.

    A de-cat is another cheapish mod (+10hp) but be careful, MOT testers will be on the look out for them next year, BMW's have pretty decent air filter anyway and as it is turbo charged a low resistance air filter is not going to make much difference, because power is linked to how much cool air the turbo to shove in the engine and not how hard it is to suck air through the air filter
     
     

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    Quote Originally Posted by matthew_henson View Post
    BMW's have pretty decent air filter anyway and as it is turbo charged a low resistance air filter is not going to make much difference, because power is linked to how much cool air the turbo to shove in the engine and not how hard it is to suck air through the air filter
    Back in my VAG days I did some MAF flow readings on various filters, cone & panel (just what me & a few mates had, all fitted to 1 car for test though), and we found that cone filters do give better MAF readings, but higher inlet temp readings (negating improved MAF flow), and also a VAG airbox could be tweaked (mainly with different inlet pipework) to flow as well as a cone filter. Finally, a new paper element filter flows as well as a Green Cotton or K&N Cotton panel filter... old paper not as well, understandably.

    In other words, look at the air scoop & feed to your stock air box and see if any improvement can be made there, then weigh up the cost & difficulties of doing so. For instance, on my 330d I can see scope for improvement, but to do so is an awful lot of fabricated parts!
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    Cheers for the advice guys! Cars due a service next month so will look at re-mapping after that, then take it from there.
     
     

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    Quote Originally Posted by Rog View Post
    Back in my VAG days I did some MAF flow readings on various filters, cone & panel (just what me & a few mates had, all fitted to 1 car for test though), and we found that cone filters do give better MAF readings, but higher inlet temp readings (negating improved MAF flow), and also a VAG airbox could be tweaked (mainly with different inlet pipework) to flow as well as a cone filter. Finally, a new paper element filter flows as well as a Green Cotton or K&N Cotton panel filter... old paper not as well, understandably.

    In other words, look at the air scoop & feed to your stock air box and see if any improvement can be made there, then weigh up the cost & difficulties of doing so. For instance, on my 330d I can see scope for improvement, but to do so is an awful lot of fabricated parts!
    Great post (and I removed the snorkel from my Mk2 airbox rather than piss around with an induction kit etc! Made just as nice a noise...)

    You've really supported my theory that in most cases, car manufacturers actually know what they're doing! The fact is that while car fans associate more power with going faster, the manufacturer also equates it to better fuel economy (i.e. they can use less fuel to get the same performance). Don't people think that, noise aside, if you could squeeze another 10bhp out of an engine by strapping a hot air sucking induction kit to a 318 they'd have done it already???!

    I'm not saying there's no place for these things but they generally require lots of extra work that makes them impractical (in the case of an induction kit a good air feed and shielding from engine heat).

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    Quote Originally Posted by cforehead View Post
    Great post (and I removed the snorkel from my Mk2 airbox rather than piss around with an induction kit etc! Made just as nice a noise...)

    You've really supported my theory that in most cases, car manufacturers actually know what they're doing! The fact is that while car fans associate more power with going faster, the manufacturer also equates it to better fuel economy (i.e. they can use less fuel to get the same performance). Don't people think that, noise aside, if you could squeeze another 10bhp out of an engine by strapping a hot air sucking induction kit to a 318 they'd have done it already???!

    I'm not saying there's no place for these things but they generally require lots of extra work that makes them impractical (in the case of an induction kit a good air feed and shielding from engine heat).

    Ok, just to play devils advocate on that point as I do get where you're coming from with the filter and the manufacturer would have put an up-rated one in already if it gave better MPG... you could argue that the manufacturer should have already mapped the ECU to the best performance for the car? However if an re-map will give extra MPG in addition to the power benefits, then why did they not do that in the 1st place? Hope that makes sence
     
     

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    Quote Originally Posted by Robharv View Post
    Ok, just to play devils advocate on that point as I do get where you're coming from with the filter and the manufacturer would have put an up-rated one in already if it gave better MPG... you could argue that the manufacturer should have already mapped the ECU to the best performance for the car? However if an re-map will give extra MPG in addition to the power benefits, then why did they not do that in the 1st place? Hope that makes sence
    The 118d is mapped for MPG so that it fits in a low tax band for company car buyer but that comes as a cost to power. The 120d is the same engine mapped for power but bumps it up two tax bands making more expensive to own both as a private and company buyer. Finally if you map for maximum peak power you get poor charactoristics like power bands and dead spots, it is a balance between a nice linear power/torque curve and economy.
     
     

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