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ENGINE
The GT3 powerplant is a normally aspirated, carbureted BMW 318is M42 engine with a displacement of 1.8 litres. This is the engine configuration that was stroked to 2.0 litres by BMW and was used successfully in the various touring car series throughout Europe during the 90's. Development on our 1.8 litre has been performed by Rebello Racing of Pacheco, California. Maximum power with Webber carburetors is currently in the range of 260hp. Fuel injection will be fitted for 2003. Engines are supplied with Carillo or equivalent I beam design alloy connecting rods and custom "touring car" design pistons. The camshafts are computer designed and ground from factory billets. The cam followers are a special solid bucket race component employing shims on the valve stems for adjustment.
The engine uses an externally mounted custom three stage dry sump oil pump with a specially cast dry sump pan. Webber carburetors are fitted to our custom cast intake manifold. Fuel injection has recently been introduced to this class, and we will be using TWM throttle bodies along with our manifolds. The engine runs upright in the chassis rather than on the standard 30º slant as in the street car for packaging considerations. The clutch is a 5¼" twin disc assembly engaging a custom 102 tooth flywheel fitted in a low height aluminum bellhousing with a tiny rear mount starter. All these components have been provided by Tilton Engineering. The exhaust system employs a beautiful stainless steel header neatly packaged with a Borla stainless steel muffler that helps the car to conform to sound regulations at most US tracks.
An additional engine supplier is Performance Developments of Costa Mesa, California, which is currently undertaking a new development program for the M42 and M50/S50 engines. Neil Harvey, the owner of that company, has worked with BMW on their Formula 1 engine program during their world championship years with Nelson Piquet in the eighties. He is very knowledgeable on a variety of race engines and has some special skills to lend to an engine development program. He has also had some articles published in performance car magazines regarding his BMW engine work. His direct connection to the BMW M GmbH engine staff will provide the program with much needed technical assistance.
The GT3 powerplant is a normally aspirated, carbureted BMW 318is M42 engine with a displacement of 1.8 litres. This is the engine configuration that was stroked to 2.0 litres by BMW and was used successfully in the various touring car series throughout Europe during the 90's. Development on our 1.8 litre has been performed by Rebello Racing of Pacheco, California. Maximum power with Webber carburetors is currently in the range of 260hp. Fuel injection will be fitted for 2003. Engines are supplied with Carillo or equivalent I beam design alloy connecting rods and custom "touring car" design pistons. The camshafts are computer designed and ground from factory billets. The cam followers are a special solid bucket race component employing shims on the valve stems for adjustment.
The engine uses an externally mounted custom three stage dry sump oil pump with a specially cast dry sump pan. Webber carburetors are fitted to our custom cast intake manifold. Fuel injection has recently been introduced to this class, and we will be using TWM throttle bodies along with our manifolds. The engine runs upright in the chassis rather than on the standard 30º slant as in the street car for packaging considerations. The clutch is a 5¼" twin disc assembly engaging a custom 102 tooth flywheel fitted in a low height aluminum bellhousing with a tiny rear mount starter. All these components have been provided by Tilton Engineering. The exhaust system employs a beautiful stainless steel header neatly packaged with a Borla stainless steel muffler that helps the car to conform to sound regulations at most US tracks.
An additional engine supplier is Performance Developments of Costa Mesa, California, which is currently undertaking a new development program for the M42 and M50/S50 engines. Neil Harvey, the owner of that company, has worked with BMW on their Formula 1 engine program during their world championship years with Nelson Piquet in the eighties. He is very knowledgeable on a variety of race engines and has some special skills to lend to an engine development program. He has also had some articles published in performance car magazines regarding his BMW engine work. His direct connection to the BMW M GmbH engine staff will provide the program with much needed technical assistance.
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