We offer engine building services or parts and machining only
We normally perform a complete engine and gearbox rebuild, as this is a complex package to get correct. See our tip on buying a used mini
In over 30 years of building mini engines we have honed our skills and knowledge (and wish to thank Graham Russell for his generous help and expertise)
We have some general beliefs and advice when it comes to building a performance(not race) 1275 (or smaller engine)
We recommend basic design to keep the brilliant torque characteristics of the original engine, not using more than 7000rpm, keeping all port sizes small to
keep gas velocity up,,wedging crankshafts to improve harmonics and engine life, and full rotational balancing.. If possible gear and final drive ratios that
allow the engine revs to be below 4000rpm at your highway cruising speeds. This makes an overall longer life engine, comfortable driving and very good
pulling power. Fuel supply can come from SU, twin SU, weber or Injection, and compression ratio needs to be as high as the fuel you use allows.
Services we offer.
Full engine reconditioning
Crankshaft crack testing ( A must on 1275 and 1100cc )
Crankshaft grinding and phasing or offsett grinding
Crankshaft wedging
Engine boring and honing
Chemical block cleaning
Block and cylinder head surfacing
Full engine rotational balance
Conrod resizing, new bolts fitted, alignment
Cylinder head reconditioning
Back to home page
We normally perform a complete engine and gearbox rebuild, as this is a complex package to get correct. See our tip on buying a used mini
In over 30 years of building mini engines we have honed our skills and knowledge (and wish to thank Graham Russell for his generous help and expertise)
We have some general beliefs and advice when it comes to building a performance(not race) 1275 (or smaller engine)
We recommend basic design to keep the brilliant torque characteristics of the original engine, not using more than 7000rpm, keeping all port sizes small to
keep gas velocity up,,wedging crankshafts to improve harmonics and engine life, and full rotational balancing.. If possible gear and final drive ratios that
allow the engine revs to be below 4000rpm at your highway cruising speeds. This makes an overall longer life engine, comfortable driving and very good
pulling power. Fuel supply can come from SU, twin SU, weber or Injection, and compression ratio needs to be as high as the fuel you use allows.
Services we offer
Full engine reconditioning
Crankshaft crack testing ( A must on 1275 and 1100cc )
Crankshaft grinding and phasing or offsett grinding
Crankshaft wedging
Engine boring and honing
Chemical block cleaning
Block and cylinder head surfacing
Full engine rotational balance
Conrod resizing, new bolts fitted, alignment
Cylinder head reconditioning
Back to home page