Notes from Dr. Borkosky

The BMW M88 is a straight-6 DOHC piston engine produced from 1978-1989. riders on the storm. In 1989, an updated version of the S38 became the worldwide replacement for the M88.

It was built in a 4-door sedan body style with 6-cylinder engines, to replace the BMW E3 sedans.From 1983 to 1986, a turbocharged 6-cylinder engine was available.

The BMW M88 is a straight-6 DOHC petrol engine which was produced from 1978-1989. Thus, the crankshaft with a long stroke corresponds to the 1982 built 3.5 l- M 30 , the engine block with oil supply and water pump and the crankshaft , the flywheel and the belt drive together with the ancillaries were taken from built after 1982 3.4-liter six-cylinder engine. Different years of M90 engines used both Bosch Motronic and Bosch L-Jetronic engine management systems. This racing version, called the M88/1, met the Group 4 regulations. This engine based on naturally aspirated M88/3 (S38B35). It is based on the DOHC version of the BMW M49 engine, which was used in the BMW 3.0CSi racing cars.[1][2]. The fuel pressure in front of the injection valves is 3 bar; actually, the pressure difference to the intake manifold vacuum for all engine operating conditions is 3 bar, thus the injected fuel quantity is directly proportional to the driving time of the injectors. [8] A dry sump is used.[9]. In addition, shortening the camshaft opening times increased the internal exhaust gas recirculation , which reduces the raw HC emissions (emissions before catalytic converter). BMW M5 (E28) , BMW M635 CSi (E24) , BMW M745i (E23) (South African variant of the 745i (E23)). m) @ 5500rpm. BMW M745i E23 , national version South Africa : as in South Africa because of the links transport of the exhaust-turbocharged engine of the 745i could not be installed (the steering gear of the right arm claimed the space of the turbocharger), was for this country in the M88 / 3 in the top model of the 7 Series , combined with an automatic transmission on request, installed. In North America up until 1989, the BMW S38 engine was used instead of the M88. For Group 5 racing, the M88 engine was turbocharged and became known as the M88/2. The M88/3 was also fitted to the South African BMW 745i, due to packaging problems with the turbocharged M102 engine which was used in other markets.[12]. In the M88/3 cylinder block used lightweight forged crankshaft with a stroke of 86 mm and 12 counterweights.

It was downsleeved and had a shorter stroke to displace 3,191 cc (3.2 L), which with the 1.4 turbo factor placed it in the 4.5-liter class. It utilizes the same block from the M88 and maintains the same bore and stroke, but borrows its head from the BMW M30 engine family. It produced 200 kW (272 PS; 268 hp) at 6,500 rpm and 330 N⋅m (243 lbf⋅ft) at 5,500 rpm. [4] For the Procar M1's, the M88 was tuned to 470 to 490 bhp. Terrain, Production, Distribution, Dates de sortie, Les Clayes-sous-Bois. It is based on the M49 motorsport engine, which was used in the BMW 3.0CSi. This version had forged pistons, sharper camshafts, bigger valves, as well as oil cooling for the transmission and rear differential. This race engine produced up to 670 kW (900 hp).[8]. The M90 sold in Europe and most other markets (except North America) used a compression ratio of 9.3:1, did not have a catalytic converter and produced 160 kW (215 hp). The resulting M88/1 engine had new camshafts, bigger valves, reshaped ports, forged pistons, use of throttle slides (instead of butterfly valves), and improved exhaust.

For the S38B35 with catalytic exhaust purification , the compression was lowered to 9.8: 1, the engine thus requires unleaded fuel with an octane rating of 95 RON. Overview. It was built in a 4-door sedan body style with 6-cylinder engines, to replace the BMW E3 sedans.From 1983 to 1986, a turbocharged 6-cylinder engine was available. The control of injection and ignition are taken over together by a Bosch Motronic. The M88 was the original iteration of the engine and was fitted to the BMW M1. For Group 5 racing, the M88 engine was turbocharged and became known as the M88/2. [3] Kugelfischer fuel injection[4] was used with individual throttle valves[5] and the distinctive six individual throttle bodies. Géographie physique, histoire, économie, Repères. So now the camshafts for the adjustments do not have to be removed. Origines et évolution La famille de moteurs M88 Il est né dans le milieu ' soixante-dix BMW quand il a été décidé de créer une voiture de sport à utiliser en compétition et en mesure de contrer la domination Porsche dans le champ GT. It has a compression ratio of 10.5:1. BMW E24 , BMW 635 CSi , BMW E12 , BMW M535i , BMW 735i, Water-cooled six-cylinder in- line engine with pressure circulation lubrication, Engine block made of cast iron with nodular graphite, Lightweight piston from aluminum with recesses around the piston pin boss ; combustion chamber recess with valve pockets incorporated in the piston crown; three piston rings : compression ring rectangular ring , intermediate ring minute ring , oil wiper ring roof lip ring with hose spring, Connecting rod forged from steel , connecting rod distance 144 mm, sevenfold mounted crankshaft from forged steel with 12 counterweights and torsional vibration damper (Massetilger) at the front tailshaft, Cylinder head made of aluminum, cross-flow cooling, two overhead camshafts , timing chain with mechanical-hydraulic chain tensioner, four valves per cylinder operated directly via bucket tappets ; Valves of the same function are suspended parallel next to each other, cross-flow flushing ; double, interleaved valve springs, Intake manifold injection with rod-operated individual throttle valves , diameter of the throttle valves 46 mm, intake manifolds combined in pairs to double nozzles, Inlet valve Ø 37 mm, valve angle 18 ° to the cylinder axis, outlet valve Ø 32 mm, valve angle 20 °, Central, due to the slightly larger than the exhaust valves larger exhaust valves slightly spark plug position, spark plugBosch X4CS or X5DC, female thread M12 × 1.5, Fan exhaust manifold , pipes with the same length and the same cross-section, Power: 345-361 kW (470-490 hp) at 9000 min, Procar performance of motors: uniform 345 kW (470 hp) at 9000 min. The M88 was produced alongside the BMW M30 engine, as the higher performance engine.

Typically identified by a white L painted on the block behind the oil filter housing and coolant water passages on the side of the block. Deviations from the M88: Displacement increased to the limit of 3.5 liters, butterfly valves replaced by flat valves, valves and channel cross-sections enlarged, Performance: depending on the charge pressure of up to 625 kW (850 hp) at 9000 min, Deviations from the M88 / 1: reduced capacity, exhaust gas turbocharging, charge pressure 1.2 to 1.4 bar. The M88/1 engine was modified for use in the E24 M635CSi and E28 M5 and was known as the M88/3. It utilizes the same block from the M88 and maintains the same bore and stroke, but borrows its head from the BMW M30 engine family. In contrast to the M88, the M88 / 3 in the BMW M635 CSi and BMW M5 and in the BMW M745i (South Africa variant) is built in the traditional way , namely in the front - which of course is mainly because they were already in production as front-engine vehicles with rear-wheel drive . It is based on the DOHC version of the BMW M49 engine, which was used in the BMW 3.0CSi racing cars. [6][7] The bore is 93.4 mm (3.68 in) and the stroke is 84.0 mm (3.31 in), resulting in a displacement of 3,453 cc (210.7 cu in). Rapp III, Contenu communautaire disponible sous les termes de la licence, Rowena (film de 1927).

The injection valves are controlled electrically by the Motronic control unit. In 1986, the E23 was replaced by the E32 7 Series, however, the E23 models (called L7) remained on sale in the United … The BMW M88 is a straight-6 DOHC petrol engine which was produced from 1978-1989. S38 has less common with M30B35. This means not only considerable cost savings due to the elimination of the equally expensive and highly precise precision mechanics of the blower injection, but also further possibilities for the efficient coordination of ignition timing and injection quantity to the respective operating state of the engine. This race engine produced 470 PS (350 kW; 460 hp) in Procar specifications.


The BMW E23 is the first generation of the BMW 7 Series luxury cars and was produced from 1977 to 1986. The S38B36 engine designed especially for BMW E34 M5 which released in 1988. The standard M1 featured the cast iron block BMW M88 straight-6 with 3,453 cubic centimetres displacement. [10] The Kugelfischer fuel injection was replaced with Bosch Motronic producing 210 kW (286 PS; 282 hp) at 6,500 rpm and 340 N⋅m (251 lbf⋅ft) at 4,500 rpm. Unlike the M88, the valve clearance is now set by shims that rest on the bucket tappet. The engine and especially the supercharging largely correspond to Schnitzer developed M49 / 4 engine, which was already driven in 1976 in the 3.0 CSL race touring car of Ronnie Peterson in Group, from 4/84 in the model BMW M635 CSi (E24) , from 1985 in the BMW M5 (E28), Camshaft opening time 264 degrees crank angle (both camshafts are identical), camshafts driven by single row roller chain, Others: electronic intake manifold injection and ignition ( Bosch Motronic M1.1) with air damper, wet sump lubrication, exhaust manifold, single-disc dry clutch , engine installed inclined by 30 ° to the right. The Kugelfisher fuel injection was replaced with Bosch Motronic and the engine produced 286 hp (213 kW). This race engine produced up to 900 hp (670 kW). 280 hp at 6,500 rpm. A dry sump is used. Typically identified by a white L painted on the block behind the oil filter housing and coolant water passages on the side of the block. In North America up until 1989, the BMW S38 engine was used instead of the M88. The torsional vibration damper on the front crankshaft stump, however, had to be retuned for the higher revs of the M88 / 3. The M88/3 was also fitted to the South African 745i, due to packaging problems with the turbocharged M102 engine which was used in other markets. "The Story of 40 Years BMW M ‒ The BMW M1", "Top 5 Great BMW Engines - mydriftfun.com", http://www.bmwblog.com/2012/05/24/chris-harris-drives-the-e28-bmw-m5/, http://www.projectm1.com/index_files/Technology.htm, http://www.bimmerforums.com/engine_faq.php, "1984 BMW 745i E23 5-Speed manual M88 engined SA model road test", "BMW M88 and S38 M-Tech 24 Valve Six Cylinder Engines", http://www.bmwmregistry.com/model_faq.php?id=5, http://www.bmwmregistry.com/model_faq.php?id=4, https://en.wikipedia.org/w/index.php?title=BMW_M88&oldid=936975646, Creative Commons Attribution-ShareAlike License, This page was last edited on 22 January 2020, at 04:47.

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