Engine - Performance Kit Installation: Overview

911 (997)

7/05 ENU 1001

Date Feb 10, 2006

Performance Increase Kit Installation Instructions (I No. X51)

Vehicle Type:
911 Carrera S (997)/911 Carrera 4S (997)

Model Year:
As of 2006

Engine Type:
Standard engine M97.01 with engine power of 355hp (261 kW)

Concerns:
Subsequent performance increase to 381 hp (280 kW)

General:
A parts kit is available for increasing the performance of the standard engine. Increased performance is achieved by implementing the following measures on the engine:

^ new cylinder heads with flow-optimized intake and exhaust ports;

^ exhaust ports and exhaust valves with larger cross-section and stronger exhaust valve springs;

^ new exhaust manifolds with larger cross-section and optimized flow behavior;

^ new intake manifolds with modified cross-section (material: aluminum sand cast);

^ new throttle housing (referred to below as electronic throttle adjuster) with larger cross-section (previously: 76 mm diameter; new: 82 mm diameter);

^ new air cleaner housing made of carbon with two intake channels;

^ modified maps for the DME control module;

^ increased engine rpm.

Certain modifications are also required and the following preconditions must be met on the vehicle side:

^ sports exhaust system including chrome-plated tailpipes;

^ new underbody cover in the rear area;

^ additional radiator together with an additional air inlet in the front apron - not for vehicles with Tiptronic transmission (I No. 249).

The higher-performance engine is also available as a factory installed option for the new vehicles specified above under Exclusive option No. "X51".

Software:
In September 2005, the software for the PIWIS Tester was updated to version 11.0.

After completing the programming of the DME control module, the control module is given a new part number for the respective country or variant (see also Step 8). The new number can be read out under the menu item "Identification".

Engine run-in:
Engine speeds greater than 5,000.1 (rpm) are not permitted over a run of approx. 300 miles (500 km). The maximum engine output of 381 hp (280 kW) depends on the total mileage of the engine at the time of the retrofit and is achieved as from a total mileage of approx. 6,000 miles (10,000km).

Warranty:
Retrofitting:
Warranty in accordance with the Repair Conditions and the Warranty Conditions for Original Porsche Parts.

If the engine to be converted has over 25,000 miles (40,000 km) mileage, the crankshaft main bearing and the connecting.rod bearings must also be replaced.

If there is obvious wear on the connecting.rod bushings (scored), the connecting rods must also be replaced.

New vehicle with increased performance "X51":

Vehicle warranty in accordance with the Porsche Guidelines.





Diagram:








Technical Description:

Information:
Please inform your sales staff and customers with regard to the break-in instructions. Copy the first three pages of this Technical Information bulletin and give these to the customers!





Parts Info:














Parts List:

Repairs:





A cylinder head complete with valves, valve springs, inserted plugs and a suitable cylinder head cover are available for carrying out repairs on the engine.





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