De-tuned verson of the m43b19??? OH REALLY???

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  1. De-tuned verson of the m43b19??? OH REALLY??? 
    #1
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    Ok gents, i feel like ive been mugged off here...

    ive found a webpage that states than the 1.9 m43 engine was built with 117bhp and 133flbs torque, BUT apparently from 1998-1999 the e46 shape with the m43 engine had a de-tune, producing 107bhp and 122ftlbs torque.....

    i feel like ive been robbed!!! a 1.9 with only 107bhp? thats just wrong, theres 1.2s running around out there with that kind of power!?!?!?!

    anyone know what i can do to "re-tune" so i can get my much deserved 118bhp and 133ftlbs torque???

    i always thought my poor car felt a little bit gutless?

    Cant afford to get a 325 and im really keen on the 4cylinder engine....

    wanna try and get a bit more pulling power out of her, when ive got my family in the car it really notices and struggles to accelerate in traffic :(



    please help everyone? my car deserves better than this :(
     
     

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    #2
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    Yes, E46's DO have m43 engines up-to 2001 , Z3's & E36 use the same engine too.

    However! The B19 came in 2 flavours:
    Power = 87 kW (118 hp) Torque = 180 N·m (133 lb·ft)
    Power = 77 kW (103 hp) Torque = 165 N·m (122 lb·ft)

    Luckily you can get a remap/tune-up for that car with an increased bhp of upto 15 bhps

    Have you PM'd the tuners on this forum ? (Check the #Vendors section to see a list of tuners)


    There are ways to make the car go a bit faster, so it all depends what you want to do & how much you're willing to spend on it.






    I've seen 4-cylinder BMW's cross the 200bhp barrier with no tuning (as a few members on here already have 200bhp 4-pot BMW's)
    Including myself,
    However, it's not cheap!
    Please find me at www. b m w f o r u m s .info (as @Wanda) - I do not check this forum anymore!
     
     

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    yeah ive got the 318i 1.9 with the m43 engine,

    ideally id like to spend no more than £300, but id like to be able to shift a car full of family and shopping without being overtaken buy the mobility scooter squad hahaha.

    Ive read that ngk iridium plugs, magnecor 8.5mm ignition leads and a decent K&N 57i induction kit would give about 20bhp more?

    some people have mentioned lightweight belt pulleys, and flywheel are a heck of a way forward because they reduce the weight which lessens the amount of effort required to turn them? But i cant find anywhere that sell them for my model car?

    also i dont wanna impact fuel economy because im already having an issue with low mpg, if i could get an improvement would be fantastic too.

    sometimes it feels like she pulls like a train, and i get really good economy, and other days she feels really choked up and economy takes a nose dive :(

    im a little bit competent with spanners but not a trained mechanic...

    if any of the tuners that spot this could give me some advice? i dont wanna mess with her too much so i can return her to stock when i come to sell.
     
     

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    P.S, i always use super unleaded, either BP Ultimate or Shell V-power nothing but the best for my car
     
     

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    Quote Originally Posted by Shaine86 View Post
    Ive read that ngk iridium plugs, magnecor 8.5mm ignition leads and a decent K&N 57i induction kit would give about 20bhp more
    not a chance on a N/A engine

    Quote Originally Posted by Shaine86 View Post
    also i dont wanna impact fuel economy because im already having an issue with low mpg, if i could get an improvement would be fantastic too.
    do a full service with NGK platinum plugs iridium plugs wont increase h/p on your car

    Quote Originally Posted by Shaine86 View Post
    ideally id like to spend no more than £300
    as above get a remap about £200
     
     

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    Well then as far as i know, these are the most common upgrades to most 4 cylinder BMW's to get more power out of them.

    This is what is usually done to get more power out of these 4-pots,
    - Remap/Tuneup (as i described on my previous post)
    - SINGLE MASS flywheel (4-pot bmw's have dual mass flywheels, & they're HEAVY!) (That explains why they generally have poor 0-60 times)
    - Closed Cold Air Intake (cold air means dense oxygen to the injectors, thus giving more power to the car)
    - Cam Timing Adjusted ( = more torque , however, a specialist needs to do this for you, as they need to take the engine apart)
    - NGK "Iridium" "IX" spark plugs (these are 'performance' plugs compared to the standard ones in most cars)
    - Performance Exhaust (aka..... de-cat )
    - M47 Crank (IIRC some 318 owners replaced the stock crank for an M47 (or similar one) to get more torque
    - "Big Bore" Throttle Body
    - DISA Delete (I'm not very sure on this part, however, when the car gets remapped/tunned, the tuner might delete the DISA himself from the ECU)


    As for fuel MPG
    - Lambda senser (Exhaust Oxygen Sensor) should be replaced if the car is at 100K miles
    - Plug the car in Diagnostics (aka. INPA) and find out if the MAF is working correctly as it should. There shouldn't be any "Air Flow Meter" issues
    - As well as , Air Temperature Sensor, shouldn't flag up any errors.



    I think a remap, closed-cold intake, 'NGK Iridium Plugs' IX , de-cat, single-mass flywheel give the biggest gains in bhp & torque
    Please find me at www. b m w f o r u m s .info (as @Wanda) - I do not check this forum anymore!
     
     

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    Excellent thanks, ill have a look into some of these.

    i think ive looked for a couple of them before like the de cat, but its very difficult to find anywhere that does them.

    what closed cold air intake would you recommend? and prices etc.

    anything that can save some weight off the car is an advantage... so anyone know where to get a single mass cluctch that would fit? or the lighter pulleys?
     
     

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    For Cold Intake, i've heard good words about "Viper" (though they're a bit pricey!) , other alternatives are "Green" (not the colour lol) and "PiperCross"

    Most decat jobs are custom, as it depends on the car & how many cats it has. (front, mid, back, etc....) .... Mostly likely to delete the front & mid cats and fix a custom back box...
    (expect some welding involved!)

    Weight reduction would mean turning your car into a "track" one, you mentioned you carry family arround, so i doubt you'd want to loose the luxuries in the car...


    However, i've found this infomation on another site...... (This is a long post though!)

    BMW E46 Weight Reductions


    1999 - 05 BMW E46 3 Series
    Stock Weight - 3351 lbs (2001 330ci)
    Stock Wheel Weight - 23lbs each/without tires

    The 1999-05 E46's weigh approximately 3351 lbs, dividing by the horsepower of 225, we get about 14.89lbs/hp.

    The 323 Models weighs approximately 3153lbs, dividing by the horsepower of 170, we get about 18.54 lbs/hp.

    M3 owners will benefit the most from weight reduction. The M3 weighs a respective 3415lbs, dividing by the horsepower of 333, we get about 10.25 lbs/hp. So every 10.25 pounds of weight removed from the car should be equal to a 1 horsepower gain!

    Listed below are some easily removable items:

    1. Passenger Seat (37lbs) - Removing the passenger seat is a very easy and effective way to give your E46 a small boost in power. The nice thing is that the seat is only held in place by 4 bolts.

    2. Rear Seat (29lbs) - The rear seat is a little more complicated to remove than the passenger seat. When removing just remember where everything goes and it should be easy to put back in place whenever needed.

    3. Rear Seat Cushion (10lbs) - The rear cushion should be removed at the same time as the rear seat.

    4. Floor Mats/Front and Rear (6lbs) - This has to be the easiest weight reduction available for the E46 owner.

    5. Tire Floor Cover (3lbs) - The tire floor cover is right underneath the rear hatch carpeting.

    6. Spare Tire and Jack (32lbs) - Another easily removable item.

    Total Easy Weight Removal = 117lbs or about a 7.8hp increase on 330 , 6.3hp on 323, and 11.4hp on M3.

    Intermediate Skill Weight Reductions

    The weight reductions included below can even prove more effective than some of the reductions included above. However, once you start removing these items you are taking away from the cars overall appearance and in some cases its more predominent ammenities.

    7. Air Conditioning (40lbs) - Removing the air conditioning will net you a reduction of about 40lbs. Be sure to remove everything from the engine as well as behind the dash. Should be completed by the experienced only.

    8. Front Hood (50lbs) - Replacing the Front Hood with a lightweight fiberglass or carbon fiber hood is a great way to remove some weight around the front end of the car. Total weight reduction will be close to 50lbs or greater depending on the aftermarket hood you choose.. If you dont intend on replacing the entire fron hood you could also remove the sound dampener on the inside of the hood. This should help in cooling your engine a little.

    9. Stock Wheels (23lbs each/replacement weight from 17 lbs each) - Replacing the wheels is a must for anyone seriously interested in increasing there cars performance. The stock wheels are quite heavy and can be replaced with a variety of aftermarket models. We would suggest searching for lightweight wheels. Replacing your wheels with lightweight wheels will dramatically increase your cars acceleration. We suggest not going over 19 inches if maximum performance is what you desire to achieve.

    10. Front Drivers Seat (40-60lbs/replacement weight from 14lbs) - Replacing the two front seats in your E46 with lightweight racing alternatives can save you a dramatic amount of weight. We suggest going with lightweight carbon fiber or fiberglass seats.

    Total Intermediate Weight Removal = up to 242lbs or a 16.2hp increase on 330, 13hp on 323, and 23.6hp on M3.

    More Weight Reductions

    Stock Flywheel - Can be replaced with lightweight aluminum flywheels or machined down in excess of just 10lbs.

    Stock Steering Wheel - Can be replaced with lighter performance steering wheel with no airbag.

    Airbag Removal - Can save some extra weight as well. (Not recommended for normal driving)

    Interior Panels - Both the drivers side and passenger side front door panels as well as the rear panels can be removed and replaced with carbon fiber alternatives to save in excess of over 40lbs.

    Stock Speakers - With a weight of over 2 pounds a piece these can also be easily removed. The stock stereo, amp, and subwoofer enclosure can also net a good savings in weight.

    Rear Hatch Cover - This can be removed and replaced with carbon fiber alternative.

    Roof - This can be replaced with the CSL type carbon fiber roof which will save in excess of 23kg's.

    Trunk - Can be replaced with lightweight carbon fiber trunk. Savings of roughly 11kg's.

    Front Dash - Can be replaced with carbon fiber alternative netting a savings of close to 60lbs.

    Replace Stock Exhaust - The stock E46 exhausts weigh considerably more than some of the aluminum aftermarket exhausts. We suggest going with a full cat-back exhaust such as those offered by Active Autowerke.

    Wiper Motors - Although they are generally needed under almost all driving conditions they CAN be removed if need be although we do not personally recommend it.

    Carpet - Removing the carpet as well as the carpet lining underneath will reduce the cars overall weight by close to 40lbs. Removing excess wiring and bolts and brackets will also net you a reduction of close to 10lbs.

    Total Advanced Weight Removal = Approx. 335 lbs or about a 22.4hp increase on 330 , 18hp on 323, and 32.6hp on M3.

    Weight Removal Totals

    BMW 330 - Approx. 694 Pounds Removed = 2657 Pounds or an increase of 46.6 Horsepower
    BMW 323 - Approx. 694 Pounds Removed = 2459 Pounds or an increase of 37.4 Horsepower
    BMW M3 - Approx. 694 Pounds Removed = 2721 Pounds or an increase of 67.7 Horsepower
    Please find me at www. b m w f o r u m s .info (as @Wanda) - I do not check this forum anymore!
     
     

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    For the amount of money and least amount of gain I wouldn't bother with a CAI or pulley's. The problem with a decat as I am sure you are aware is fitting the cat back for a MOT, also if you have family in the car will they appreciate the extra noise?

    I recommend a decent panel filter for your stock air box, remap and stick to standard/recommend spark plugs for your car
     
     

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