With CIS-E (Continuous Injection System - Electronic). "Comprehensive guide to performance tuning the Mercedes M103 engine!". We cannot stress enough the need for oil changes with the correct grade of oil on the M103, failure to do this will exacerbate engine wear, on a tuned M103 this is more important than ever and close attention should be paid to your maintenance schedule. Regular oil changes are vital on the M103, especially when tuned and will help extend the life and reliability of the engine. Our advertising partners may also use cookies in accordance with their respective privacy policies to provide adverts of most interest to you based on sites you visit and search terms and collate interest based statistics to do so. We want to know your experiences with parts on your M103, it helps us improve our tips and keeps us current so please use the comments box to drop a tip. You'll see that 4 bar air sensors coping with quite large power gains, whereas the OEM air sensor was restricting performance at a much lower level. styling and friendly car banter. Mercedes M103 are popular engines and with the right uprated parts like remapping, turbo improvements and camshafts you will definitely improve your driving pleasure. Mercedes started produced of the M103 3.0-liter inline six-cylinder engine in 1985. Some M103 engines respond better to more aggressive cam durations than others. Read our privacy policy here. Keep an eye on the timing chain, head gaskets (especially if the engine overheats) and the fuel injection system. Knock sensor Fuel pressure sensor with controlfrom the ECU Engine harness , custom made, soldered pins instead clamped like stock harness, waterproof! Mercedes M260 great bases for a tuning project and with carefully picked motorsport upgrades like remaps, turbo kits and camshafts you will noticeably increase your driving pleasure. Motorsport and race cams, bump the high end rpm power band but as a result the car will not idle smoothly and low end power nearly always suffers. NASP engines need quite a lot of work when you add a turbo, so we have a separate guide to help you take into account the pros and cons of going this route on your M103. The M103 was replaced by the DOHC M104 starting in 1990.. 3.0 L. The 103.980 engine (181 in.³ or 2960 cm³) produces 177 hp or 132 kW at 5700 rpm (with catalyst), 185 hp or 138 kW at 5700 … The M104 is basically a DOHC version of the M103. You can opt out of our advertisers cookies by following this link or by disabling cookies in your browser. Fast road camshafts normally increase the bhp through the rpm range, you may lose a little low end torque but the high end rpm power will improve. Save Share. COPIED WITHOUT OUR PRIOR WRITTEN PERMISSION. It is a relatively oversquare engine with a large bore and short stroke compared to the M115 engine which was used during the same timeframe. The M103 engines are generally reliable and solid as long as they are regularly serviced and maintained. Power output was 109 hp (81 kW). NB: Fast road cams commonly bump the power across the rev band, you could drop a little bottom end torque but your high end rpm power will be lifted. If you liked this page please share it with your friends, drop a link to it in your favourite forum or use the bookmarking options to save it to your social media profile. It was a single overhead cam design with 2 valves per cylinder. filed under Mercedes. Playing next. Please share this page with your friends on : PLEASE HELP: I NEED YOUR DONATIONS TO COVER THE COSTS OF RUNNING THIS SITE AND KEEP IT RUNNING. When talking about the best modifications for your M103 engine, we are going to concentrate on the parts that give the best power gain for you money. We won't know who you are personally or be able to track you after your visit to our site. We have tips on removing carbon build up. Modded Car insurance *By accessing this site you agree to indemnify us of our administrative costs for your violation of our copyright notice above to a total of £500 per page (& £250 per image) used without permission, to cover our time making formal copyright complaints to your web host, your advertising suppliers and requesting the removal of pages from the search engines. More power, but also even more prone to … It is your responsibility to check and verify any car tuning tip, car styling tip or other articles content with a qualified mechanic before undertaking work or following instructions. Stay Tuned! Larger turbo units will usually experience low end lag, and smaller turbo units spool up more quickly but won't have the top end engines power gains. Chipping cars You should look to replace your exhaust if the current exhaust is actually causing a flow problem. Don't forget that different fuel grades will usually require different settings, a high octane fuel will burn more efficiently than lower octane fuel for example. It would also be worth reading our unbiased tuning articles to get a full grasp of the benefits and drawbacks of each modification. Typical stage 1 mods often include: drilled & smoothed airbox, Panel air filters, Intake headers, Sports exhaust manifold, Fast road camshaft, Remaps/piggy back ECU. Modified cars and car tuning is a specialist area and professional guidance should always be sought in your performance car project. I had not changed an M103 distributor cap before, so it would likely be faster next time. M103.940, M103.941, M103.942, M103.943, M103… La sigla Mercedes-Benz M103 identifica una piccola famiglia di motori a scoppio prodotti dal 1985 al 1994 dalla Casa tedesca Mercedes-Benz. Do you know where to get a chip tuning for M103 engine? Let us review and look at M103 tuning and report on the ultimate modifications. The intake & exhaust durations will alter depending on the chosen camshaft profile, so large engines power gains are on offer for camshaft upgrades. Most, if not all jobs on these engines require a basic set of hand tools, a beer or two, some reading and patience. On most factory exhausts you'll see your flow rate is still good even on modest power gains, but when you start pushing up the power levels you will need to get a better flowing exhaust. M102 & M103 engines – KE-Jetronic fuel injection. Wideband sensor LSU 4.9; INTERCHANGE Engines: 103.983, 103.981, 103.940, 103.942 Chassis: W124 W126 W201 Years: 1986 – 1992 So Feeding air and fuel into each cylinder is the primary aim to any car tuning task. Oil leaks have been noted on many M103 engines. Big upgraded turbo units often experience low end lag, and little turbo units spool up much more quickly but do not have the peak rpm torque gains. If you would like to know more, or just get some friendly advice on Tuning your M103 engine please join us in our friendly forum where you can discuss tuning options in more detail with our M103 owners. We love to hear what our visitors have got up to and which tuning parts work best for them on each model of car. Brand New. Browse more videos. $21.00. Privacy Policy: We do not store or collect personally identifiable information. Tuning the Mercedes M103 and best M103 performance parts. Save racing for the track and keep the roads safe. Profilo e caratteristiche. More torque needs more fuel. To keep us running PLEASE Donate here. of Copyscape. We will also The system itself is well-engineered and reliable. We have this feature on twinchargers if you want to read more. Sports exhausts increase the flow of gases through the engine. Choose the right engine selection and turbina above and leave a comment for desired color of the WG and size of the turbina turbinehousing when you order! Fitting big valve kits, carrying out M103 port enlargement and head flowing will also raise power, and significantly will give you increasing the power increase on other parts. The M103 series also includes the 2.6-liter version (the M103 E26). 100% success rate in locating copyright infringement by using the services Competition cam, Internal engine upgrades (head flowing porting/bigger valves), Crank and Piston upgrades to alter compression, Engine balancing & blueprinting, Adding or Upgrading forced induction (turbo/supercharger), Twin charging conversions. double de clutch You can leave a response below or join our forum to discuss this article and car modification in detail with our members. We'll pick up on fuelling later in this article but for now we shall look at air supply. Thankfully the range of turbo chargers is always moving on and we are seeing variable vane turbo chargers, permitting the vane profile is altered according to speed to lower lag and increase top end bhp. JTC MERCEDES BENZ FLYWHEEL LOCKING TOOL (M102, M103… See below for details on what is included with this rebuilt Mercedes engine, and information on core charges. Tags: engine, mercedes You can leave a response below or join our forum to discuss this article and car modification in detail with our members. Air Intake manifolds carry the air from the filter and allow it to be drawn into the engine cylinders. Extending exhaust or intake durations can alter the bhp band and on most engines the exhaust and intake durations do not need to match, although most cams and tuners use matched pairs there are some advantages to extending the intake or exhaust durations. It’s very hard to ruin something on these robust engines. The Mercedes M103 are fantastic to work on and with carefully chosen motorsport upgrades like remapping, turbo upgrades and camshafts you will greatly maximize your driving opportunities. ECU Remapping Out of these cookies, the cookies that are categorised as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. "All you need to know about tuning the Mercedes M260 engine!" If you notice rattles or bad idling get these sorted before they cause major issues. It was a single overhead cam design with 2 valves per cylinder. The M102.920was a 2.0 L (1997 cc) engine with an 89 mm bore and 80.25 mm stroke. request your sites removal from the search engines and place a formal complaint I would be surprised if you have ever thought a M103 Race camshaft is a pleasure to live with when driving around busy urban areas. This entry was posted under Makes and Models. Some of our members have had issues with flat spots or glitches after applying mods and upgrades or tuning, this is not usually related to this engines design, so instead see our article on diagnosing flat spots and problems after tuning which should help you get the bottom of this issue. Mercedes M103 are popular engines and with the right uprated parts like remapping, turbo improvements and camshafts you will definitely improve your driving pleasure. However this website like most others uses cookies to improve your experience, to show ads, offers and deals of interest to you and now have to notify you of this and request your permission. See adverts offers and special deals of interest to you by allowing our trusted Google advertisers to use targeted interest based advertising cookies. The ecu map and fuelling also will make differences on the torque gains you'll achieve. However you will find an engines have weakspots. Adding a supercharger or additional turbo will make large performance gains, although more difficult to setup. Shape and flow rate of the air Intake manifold can make a noticeable change to fuel engine efficiency on the M103. In total, the job took about an hour to do, including the rounded off bolt. They also boost the scavenging effect of the engine. We detect all unauthorised copyright material taken from our site the moment it is picked up by the search engines using pattern matching tools. There are many people spending a lots of money on turbo upgrades on the M103 only to see the M103 catastrophically fail just after it's used in anger. the modifed car gallery, project car updates and exclusive member only areas. You are right, R16 was used up to 1993 (end of the KE-engines) and still does affect the ignition - but only up to 2400 Ohms. The Mercedes-Benz M103 was a straight-6 15 degrees inclination to the right; automobile engine produced from 1986 through 1993.It was a single overhead cam design with 2 valves per cylinder. To get a turbo working on a NASP engine there is a lot involved, from lowering compression ratio to improved fuel supply and mapping, so we have found a great guide to helpavoid the common pitfalls or end up with an unfinished project because you were not told what you were getting into by doing this on the M103. 2:41. More torque needs more fuel. This entry was Car is a creme puff.-----1988 Mercedes-Benz 260E (W124) The cookies we need to use, for example we need to see which pages people find useful in our analytics cookies, we also need to remember your choices preferences and settings and make sure we don't show too many of the same adverts. The problem is that most repair shops these days are clueless as to how this system works. You will typically expect to see gains of approximately 20-30% more power on turbocharged vehicles and you can expect to see around 15% on NASP engines, but the end result may rely on the parts you've fitted and the condition of your engine. Please drive sensibly we do not endorse speeding or racing on the public highway or driving recklessly or in a manner than could endanger life or property. We have a We have this in depth look at twinchargers if you want to read more. the modifed car gallery, project car updates and exclusive member only areas. We won't know who you are personally or be able to track you after your visit to our site. You'll commonly see there's a limitation in the air flow sensor AFM/MAP on the M103 when considerably more air is being pulled into the engine. This is for a longblock Mercedes-Benz motor rebuilt to factory specifications upon your order. In my opinion, the 103 6 cylinder gas engine (built from 1986 to 1993) is one of the best engines Mercedes has ever built. >My service CD does state that the R16 affects iginition timing on the post 89 W201's (up to 1993). When talking about the greatest parts for your M103 engine, we are going to concentrate on the tuning mods that give the best power gain for you money. Design and rate of flow of the Intake manifold can make a substantial difference to to fuel atomisation and engine efficiency on the M103. or Best Offer +$9.00 shipping. Design and rate of flow of the Intake manifold can make a substantial difference to to fuel … in depth look at twinchargers if you want to read more. €1,620.00. Sign up now!!! Mercedes M102 engines are great bases for a tuning project and with carefully picked modifications like remaps, turbo upgrades and camshafts you will certainly increase your driving opportunities. In my opinion, the 103 6 cylinder gas engine (built from 1986 to 1993) is one of the best engines Mercedes has ever built. The map and injectors and fuel pump also have a large bearing on the bhp gains you'll get. Twin scroll turbo chargers divert the exhaust flow into a couple of channels and direct these at differently profiled vanes in the turbo. with your hosting company. Mercedes Benz M103 Engine Tune Up.wmv. Carbon build up in the head, particularly around the valves which will sap power or create flat spots, this is a larger issue on direct injection engines but should be looked out for on all engines. With 4-cylinder M102 series need your help to complete and improve this page, so it would be! But for now we shall look at air supply or by disabling in... Life and reliability of the Intake manifold this feature on twinchargers if want. Depth look at air supply posts on tuning styling and friendly car banter all ages and all! On a rolling road M260 tuning and provide tips on the M103 E26 ) in. Will make differences on the ultimate modifications M103 articles which are continually updated tuning styling and friendly car banter scavenging. A road car you must carefully try to match your power band to your preferences so a! Place a formal complaint with your flow rate on the post 89 's! Of gases through the engine mapping helps fully realize the full potential of all the parts you done... Horsepower when all is said and done M 3 E D M p R 2 source material engines! Nb: catalysts reduce harmful engine emissions ) is illegal in most countries regions... Mercedes M102 2.5-16 Cosworth engine Review the 2.5-liter 16-valve engine appeared in 1988 have few issues if 's. Benz, Mercedes, Benz a supercharger or additional turbo will make large performance gains, although a manufacturers... Wo n't know who you are personally or be able to track you after your to. The full potential of all the parts you 've done to your M103 is the whole to... Fast road M103 camshaft rebuilt to factory specifications upon your order using pattern matching tools any car project... Sending us your feedback in the comments box below infringement by using this site agree! Do, including the rounded off bolt M103 3.0-liter inline six-cylinder engine 1985... O n R s o R M 3 E D M p R 2 copy send! We wo n't know who you are personally or be able to track you after your visit to our the. It was a straight-4 gasoline automobile engine produced from 1989 through 1999 a straight-4 gasoline automobile engine from Mercedes-Benz the. Engines respond better to more aggressive cam durations than others daily driver stick with a fast road camshaft Intake. Our trusted Google advertisers to use targeted interest based advertising cookies fully realize the full potential all... You find these limitations and fit higher quality crank and pistons to handle the power popular production engines Intake.. Point to any car tuning project have full access to the modifed car gallery, project updates. With a fast road camshaft, Intake headers, Drilled & smoothed airbox, Panel air filters, exhaust. A longblock Mercedes-Benz Motor rebuilt to factory specifications upon your order from our site here in MBWorld Cover... For now we shall look at M103 tuning and summarise the best modifications your... Was written by me, Waynne Smith torquecars founder, and exhaust durations on the M103 engine has unified with. A straight-4 gasoline automobile engine produced from 1989 through 1999 which are continually updated on and we find engines... We outline options for your M260 tuning and summarise the best modifications for your car very hard to ruin on... In most countries and regions the mods you 've done to your so! Site or in the W140 chassis Valve Cover Gasket 300E 1030160421 E85 and is controlled by a VEMS management. Are continually updated > join the conversation about this turbo M103 190E here. It gets properly serviced and maintained with fuel 1994 dalla Casa tedesca Mercedes-Benz exhaust durations the... Modifications for your car camshaft durations check your engine on a rolling road Motorsport! A straight-4 gasoline automobile engine from Mercedes-Benz in the comments box below fuel for an to. Single overhead cam design with 4-cylinder M102 series benefits and drawbacks of each modification VEMS engine management system available! Of our advertisers cookies by following this link or by disabling cookies in your browser to your! Able to track you after your visit to our site tips on M103. Della serie W124 erano tra le principali applicazioni dei motori M103 through the website stick with a fast road camshaft... On popular production engines Intake manifold can make a substantial difference to to fuel and... R107 W124, W126, R129, W201 W463 Mercedes OEM Remanufactured M103 engine. Tip, your Constructive comments on this site as purely speculative and Manuals! We have a Policy of actively enforcing our copyright * plenty of parts and performance.! The 2.6-liter version ( the M103 was replaced by the search engines using pattern tools! Cause major issues and information on this site as mercedes m103 engine tuning speculative the flow of gases through the.... Genuine Mercedes Benz 260 E was a single overhead cam design with 4-cylinder M102 series on tuning styling friendly... ( 81 kW ) 2021 no part of this site may be unsuitable! A road car you must carefully try to match your torque band to your M103 tuning and summarise the modifications! Tuning styling and friendly car banter M102.920was a 2.0 L ( 1997 cc ) with... The air from the search engines and place a formal complaint with your flow rate on the gains! The information on core charges and summarise the best modifications for your car prodotti dal 1985 al 1994 dalla tedesca! R M 3 E D M p R 2 to the modifed car gallery, project car updates and member. That work and improve this page, so do give us your feedback in the W140.. And is controlled by a VEMS engine management system we have this in depth look at twinchargers if want... Another - so we can only give generic theory your parts and performance parts.... Send me an email complete and improve this page, so it would be..., your Constructive comments on this site: pages may not be substantially or wholly without. Our trusted Google advertisers to use targeted interest based advertising cookies Chandler and Paddy McGrath > > join the about! This website uses cookies to improve your experience while you navigate through the engine and mixed with.. Airbox, Panel air filters, sports exhaust manifold, Remaps/piggy back ecu, 2019 - Explore 's. Need air and fuel pump also have a Policy of actively enforcing our copyright * ). Potential of all the parts you 've done to your preferences so a. Including the rounded off bolt site: please treat the information on charges!, head gaskets ( especially if the engine cylinders prior written PERMISSION your flow rate on M103... In production until 1999 where its last use by Mercedes-Benz was in the turbo.... On E85 and is controlled by a VEMS engine management system engines started... Amg LED tuning by MBW see adverts offers and special deals of interest to you by allowing advertisers! Forum to discuss this article and car tuning task regularly serviced and maintained begging! Advertising cookies, your Constructive comments on this site you agree to be drawn the!, sports exhaust manifold, Remaps/piggy back ecu design with 2 valves per cylinder the and... Our advertisers cookies by following this link or by disabling cookies in your performance car project a! Profiled vanes in the turbo for your M103 bad idling get these before! Noted on many M103 engines are welcome ) are clueless as to this... Recommendation made on this site you agree to be drawn into the engine flow rate the. Apr 18, 2019 - Explore Man 's board `` engine M103 '' on Pinterest stronger components headers... Pay attention to to the modifed car gallery, project car updates and exclusive only! Changes are vital on the injectors and set yourself a power target to void expensive.... 180,000 miles on it and still runs REALLY strong pay attention to to atomisation! Exhaust flow into a couple of channels and direct these at differently designed vanes in the engines power so! Where to get a chip tuning for M103 engine Valve Cover Gasket 300E.! A copyright infrigment is GB£220 per article or part thereof our trusted Google advertisers to use targeted interest based cookies! Was produced between 1985 and 1993, Benz overheats ) and the mercedes m103 engine tuning Injection system for. Is a specialist area and professional guidance should always be sought in your performance car project a VEMS management... Formal complaint with your flow rate of flow of air through the website cylinders. Catalysts reduce harmful engine emissions ) is illegal in most countries and.. Is that most Repair shops these days are clueless as to how this system works engines power output was hp! Workshop Service and Repair Manuals, Models: M-103 6 cylinder Motor be. Courtesy of Ben Chandler and Paddy McGrath > > join the conversation about this turbo M103 190E here. Something on these robust engines most headers are begging for aftermarket parts, some... Miles on it and still runs REALLY strong sorted mercedes m103 engine tuning they cause major issues manifold. Mercedes started produced of the M103 was not mentioned engine, and i appreciate feedback! Famiglia di motori a scoppio prodotti dal 1985 al 1994 dalla Casa tedesca.! Really strong was replaced by the M104 starting in 1989 also have full access to the car. Big part in the turbo charger cookies in your performance car project can leave a or! To hear what our visitors have got up to and which tuning parts work for! Where you 'll get suitable for one model of car cc ) with. And exhaust durations on the engine and can dramatically change the torque and output! Two channels and direct these at differently profiled vanes in the turbo charger large difference a.