M10 Engines

Stock Rebuilds

 Korman Stock Rebuild-M10

2 year/24,000 mile warranty

Our stock rebuilds are assembled to BMW specifications by our experienced and dedicated technicians rather than off a mass production assembly line. Korman engines are assembled with meticulous craftsmanship, precise machining, and detailed blueprinting. All of our boring is done with a torque plate for exceptional bore roundness and long engine life. These hand built engines are available at prices comparable to a factory reman units which offer only 12 month/12,000 mile warranties.

Stock Rebuild, 2002 Carbureted P/N 11002000

Stock Rebuild, 2002 Tii P/N 11OT2010

 

Korman High Performance Clean Air Engines

New emissions standards may lead you to believe that traditional high performance BMW engines have been legislated away. Not so! Excellent power and acceleration gains can be realized within these constraints by improving flow and reducing reciprocating mass of engine and driveline components. Our Clean Air Engines are fast, reliable, safe, and clean to help you get the most out of your BMW.

 Stage 1 Clean Air Engine-2 year/24,000 mile warranty

In our Stage 1 Clean Air engines we apply our high performance techniques to extract maximum power from stock parts while making no changes that affect Federal or State emissions laws. Our flow tested porting , polishing, valve and valve seat work promote smoother, more efficient air/fuel flow keeping the mixture much better suspended for cleaner burning. Valve spring pressure is increased for a higher max rev limit of 7000 rpm. To reduce reciprocating weight and improve acceleration we lighten and balance the connecting rods, fit stronger light weight piston pins, and lighten the flywheel. Carbureted models include a Bosch Sport Coil, High Performance Ignition Wires, and Mechanical Advance Distributor. 10-15% horsepower increase according to model.

P/N 11002100CA

Stage 1 Clean Air Engine with Weber Downdraft Carburetor Conversion 2 year/24,000 mile warranty

P/N 110W2100CA

Stage 1 Clean Air Engine-Tii-2 year/24,000 mile warranty

P/N 110T20CA

Stage 2 High Performance Clean Air Engines

These engines receive our Stage 2 competition-type engine treatment for maximum performance while still meeting emissions standards. Porting and polishing are more extensive than our Stage 1, valves and seats are re-cut for improved flow,and all valves are swirl polished. For increased high RPM strength we add dual valve springs, titanium valve spring retainers, and our Korman Rocker Arms. Instead of reworked stock rods, we install our light weight chrome steel alloy connecting rods for a very substantial reduction in reciprocating weight. Lightweight piston pins are included, and the steel flywheel is lightened or replaced with our aluminum flywheel. We recommend our light weight heavy duty Sachs Sport Pressure Plate and matching disc as appropriate add-on items. We include our competition type oil system modifications for improved engine lubrication. Carbureted models receive a Bosch High Performance Coil and Mechanical Advance Distributor. Thermal barrier exhaust coating is also included.

Stage 2 Clean Air Engine w/Weber 32/36 Conversion-2 year/24,000 mile warranty

 

P/N 11002220CA

Stage 2 Clean Air Engine-Tii-2 year/24,000 mile warranty

 

P/N 1102230CA

Korman Competition Engines

These engines are not designed or intended for use on public highways. They do not meet requirements of the Clean Air Act of 1991 or of the California Air Resources Board. They are offered for track use only.

Stage 1 Carbureted Engine-2 year/24,000 mile warranty

A moderate increase in compression ratio, special valve work, mechanical advance distributor, Bosch Sport Coil, and Korman-Stahl headers combine to extract about 12% increase in power over the stock engine. The stock cam is used resulting in a very fuel efficient, quick engine. Expect about 112HP with the Weber 32/36 conversion.

Stage 1 Engine P/N 11002100

Stage 1 Engine with Weber 32/36 Conversion P/N 11002114

Stage 1 Tii Engine (140 HP) P/N 110T2110

Stage 2 Competition Engines-2 year/24,000 mile warranty

This is our most popular M10 performance engine. Lots of torque, smooth idle, rapid acceleration to 7000 RPM. This is a solid 150HP engine, yet when driven with a light foot can get up to 30 mpg. This engine utilizes dual Weber 40 DCOE's with Korman's 1 piece balance port intake manifold, Korman K-300 Camshaft, Bosch Mechanical Advance Distributor, Korman-Stahl Header, Dual Valve Springs, Chrome Alloy valve spring retainers, and Korman Rocker Arms. Connecting rods are lightened and balanced, cylinder heads are fully ported and polished. The engine is completely balanced and blueprinted. All boring is done with a torque plate for best cylinder roundness. Substituting the Schrick 292 cam yields an additional 10 horsepower

P/N 11002200

Stage 2 Competition Engine with Weber 32/36 Carburetor

Same as above with the economy of utilizing the two barrel downdraft carb on the stock (73-76) manifold. Dyno tests at 140HP.

P/N 11002220

Stage 2 Competition Engine-Tii

160 HP when utilizing the original Kugelfisher Injection.

P/N 11002230

Stage 3 2.0L Competition Engine

Our hot autocross/rally engine. This is a light competition engine built for power. Don't expect 150,000 miles at 7500RPM, but it is designed to operate at that engine speed. This 170 HP engine includes the Schrick 316 cam, two twin 45 DCOE Webers, lightweight connecting rods, high compression pistons, titanium valve spring retainers, racing headers, etc. Blueprinted and balanced to competition specifications.

P/N 11002300

 Korman M10 2.2 Liter Engines

This capacity is available in our otherwise stock spec motor, Stage 1, 2, 3, or Full Race Spec Motor.

The special crankshaft requires a different timing chain/oil pump/crank sprocket, a different front vibration damper/pulley, improved front hub assembly, custom light weight forged pistons with light weight pins, custom length competition connecting rods, special machining to the front timing cover, and machining of the block for clearance of the longer stroke assembly.

The Club Net price for this package adds $3200.00 to the engine prices.  

We also recommend to use larger primary size Stahl headers at an additional cost of $140.00 over our standard 2002 header.  The ceramic thermal barrier coating adds another $205.00.

Weber carb jetting and choke size must be changed to handle the increased power.  Our Webers are sold with jets and chokes fitted to your engine specs so there is no additional cost for this change.

It is characteristic of the dynamics of increasing stroke that there will be frictional and inertia losses at high rpm resulting in a top end increase of only 5-7%, but producing and impressive 20% or more increase in bottom end torque.  The great advantage here is a very substantial increase in acceleration without having to work the engine hard with high revs.  Smooth, strong response is coupled with increased durability.

M10 2.2 Engine Kit P/N 110S0022

 

Sample: 2.2 L M10 "Street" Engine

-2002 street engine, 292 cam, programmable injection, 170 hp-

 

All Korman engines are priced built on your good core

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