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|The good old Austin Rover Mini with its antiquated A Series engine which has its roots back in the 1950's where long stroke engines were favoured as a result of taxes imposed on cylinder size.|
The Austin/ Morris/ British Leyland/ Rover legendary A Series engine which has its roots back in the 1950's where long stroke engines were favoured as a result of taxes imposed on cylinder size. Would anyone believe then, the A series engine would be so durable and yeild power figures as they do Today? Here's how it's done.
|Would anyone believe the A series engine would be so durable and yeild such power figures as they do these days? Well, here's how it's done, or, here's how I have done it at least, and note, this is a conservative build, there is room for improvement.|
Brief overview of the Engine
A BMW K1100 (motorcycle) 16v Twin cam cylinder head engineered onto Rover A+ Series engine and transmission.
*Choce of two OEM camshaft sets, the softer 256 duration cams selected.
*Cam timing set for 115 inlet and 110 exhaust.
*Engine is a 1996 onwards 1275cc MPi block over bored +0.5mm.
*Accralite 18cc dish forged pistons, at 1293cc and compression 8.5:1.
*Standard crankshaft, Nitrided.
*Mitsubishi TD04HL-15T turbocharger from a SAAB 93/95.
*Transmission is an uprated straight cut gearset with a Quaife ATB diff.
*Similar combination already dyno'd at 268hp on 20Psi boost.
*Toyota Yaris COP Ignition coils 90919-02240
*Bosch 'Green Giant' 0280155968 injectors
*3bar or 3.5bar Pierburg rail integrated fuel pressure regulator (adapted from some sort of Audi V6)
*Walbro 255 in tank fuel pump
*Bosch 0 280 122 001 Throttle Position Sensor
*Bosch 0 281 002 401 (038 906 051 C) MAT/MAP 3bar sensor
*VR Primary trigger 36-4 (Rover Mini Mpi) (also Rover-K Lotus-Elise e324)
*VR Secondary trigger OEM (late Rover Mini MPi engine block)
*Bosch generic 'blue' CLT sensor
*Stepper motor IAC Valve Taken from a Rover K Series VVC
*Pierburg Boost solenoid
*RTS Verto clutch. A modified standard unit assembled from two standard clutches.
|Set up and config to follow|
A BMW K1100 16v Twin cam cylinder head engineered to fit a Rover A+ Series engine and transmission with a SAAB 93/95 Mitsubishi TD04HL-15T turbocharger. Engine is 1293cc and compression 8.5:1, I could have gone much higher but the combination of parts gave me this without going positive deck with the pistons. That said, I know I can throw 30psi at this and it'll still work. The same combination already dyno'd at 268hp on 20Psi boost, so lots of fun to be had!!!
Rover A Series 1275cc +0.5mm (1293cc) engine and transmission
BMW K100 4v twin cam cylinder head using the K1100 'LT' cams (256 duration)
Mitsubishi TD04HL-15T turbocharger from a SAAB 93/95
Toyota Yaris COP Ignition coils 90919-02240
Bosch 'Green Giant' 0280155968 injectors
3bar or 3.5bar Pierburg rail integrated fuel pressure regulator (adapted from some sort of Audi V6)
Walbro 255 in tank fuel pump
Bosch 0 280 122 001 TPS from Webstore
Bosch 0 281 002 401 (038 906 051 C) MAT/MAP 3bar sensor from webstore
VR Primary trigger 36-4 Factory (Rover Mini Mpi) primary trigger (Rover-K Lotus-Elise e324)
VR Secondary trigger OEM
Bosch generic 'blue' CLT sensor
Stepper motor IAC Taken from a Rover K Series VVC
Pierburg Boost solenoid
Vems Round gauge
The clutch is a modified standard unit assembled from two standard clutches. If one spring is not up to the job, just add another...............
It's starting to get tight for space in there now!
|It's tight for space!|
|Set up and config to follow|
Coil On Plug
Coil on plug options
Changing from power ignition output to 'logic level' output
Evaporative Emissions Purge Valve
Ideas for controlling the Purge solenoid valve
I am using an Evermore GM-R700 receiver with the RS232 serial port.
I have been using the VEMS Bluetooth adapter though I am looking at something a little more robust.
Noisy 5v+ supply (Fluttering MAP/TPS)
I have experienced noisy 5v+ related to Vems Bluetooth adapter supply causing MAP and TPS to flutter significantly enough to cause engine running issues
|MembersPage/Sprocket/CoilOnPlug Coil On Plug|
|MembersPage/Sprocket/LogicLevelOut Logic Outputs|
|MembersPage/Sprocket/EvaporativeEmissions Evaporative Emissions Purge Valve|
|MCP3208 Channel utilisation|
|MembersPage/Sprocket/BoostControl Boost Control|
|MembersPage/Sprocket/GPS GPS Logging|
|MembersPage/Sprocket/NoisyTPS Noisy 5v+ supply (Fluttering MAP/TPS)|
|Thoughts on future use of E85.|
|MembersPage/Sprocket/AnalogInputs Analog Inputs|
|MembersPage/Sprocket/WheelspeedTwo Wheelspeed 2 Input|
|MembersPage/Sprocket/MatMapSensor MAT MAP sensor|
|Wideband Ri Target|
|MembersPage/Sprocket/VemsTuneTweaks VemsTune Tips and Tricks|
|MembersPage/Sprocket/WideBandRiTarget Wideband Ri Target|
|MembersPage/Sprocket/ECUFusing Safe Fusing of the ECU|
|MembersPage/Sprocket/ErrorReports Error Reports|