The "914S" 2056cc kit from Jake Raby at aircooledtechnology.com has be purchased with "extensive prep services". This is a longblock kit with all the machine work and proper shims prefit so assembly and installation is all that is required. I've never built an engine, so I decided to spend the extra cash on a full-blown kit that will last the life-time of the car.
The kit includes Jake's 9550 cam which is known for excellent drivability with stock fuel injection. Also included are the LE180 3-stud heads from Len Hoffman at HAM Inc. These are new castings with 914 2.0L geometry and spark plug location.
Engine management will be from SDS, the EM-4D fuel-only system.
The intake system will be plenum based. A 2.0L bus throttle body will modified for a potentiometer based TPS (Bosch 0280122001) using a modified throttle shaft from a '74 412. The 2.0L bus TB has larger inner diameter than the 412 TB and is designed for horizontal intake like the 412 (unlike the 914 TB that is for vertical intake). The plenum will also be 2.0L bus having a larger volume than the 412 plenum. The larger diameter Porsche 914 2.0L intake runners will connect to the 3-stud heads.
Idle air control will be from the stock Auxillary Air Regulator (AAR). This system gives an even idle during warm up and the MAP sensor from the SDS will compensate fuel.
The cold start injector from the 412 will be omitted as the SDS can modify pulsewidth during warmup.
AFR will be measured with Innovative Technologies LM-1 during SDS programming and then removed for daily driving.
The SDS ECU will be housed in a gutted out D-Jet ECU box located in the stock position.
Ingition will be via a Mallory Unilite (4554101) mechanical advance distributor preset by Raby's Aircooled Technology. A Mallory Promaster coil and Mallory Hifire VI-A CDI will be located under the rear seat.
Exhaust will be a Thunderbird until the Tangarine/Raby Bus Header is available.
The kit includes Jake's 9550 cam which is known for excellent drivability with stock fuel injection. Also included are the LE180 3-stud heads from Len Hoffman at HAM Inc. These are new castings with 914 2.0L geometry and spark plug location.
Engine management will be from SDS, the EM-4D fuel-only system.
The intake system will be plenum based. A 2.0L bus throttle body will modified for a potentiometer based TPS (Bosch 0280122001) using a modified throttle shaft from a '74 412. The 2.0L bus TB has larger inner diameter than the 412 TB and is designed for horizontal intake like the 412 (unlike the 914 TB that is for vertical intake). The plenum will also be 2.0L bus having a larger volume than the 412 plenum. The larger diameter Porsche 914 2.0L intake runners will connect to the 3-stud heads.
Idle air control will be from the stock Auxillary Air Regulator (AAR). This system gives an even idle during warm up and the MAP sensor from the SDS will compensate fuel.
The cold start injector from the 412 will be omitted as the SDS can modify pulsewidth during warmup.
AFR will be measured with Innovative Technologies LM-1 during SDS programming and then removed for daily driving.
The SDS ECU will be housed in a gutted out D-Jet ECU box located in the stock position.
Ingition will be via a Mallory Unilite (4554101) mechanical advance distributor preset by Raby's Aircooled Technology. A Mallory Promaster coil and Mallory Hifire VI-A CDI will be located under the rear seat.
Exhaust will be a Thunderbird until the Tangarine/Raby Bus Header is available.
