MED MULTI-WEB CRANKSHAFT KIT - MINI

Yes and no - it will fit a standard 1275 block but the gearbox housing may require minor modification for clearance. We would also highly recommend a steel main cap upgrade, which will then require line-boring. The narrower big end journals mean that standard type conrods do not fit; therefore we can only supply the crankshaft as a complete package with conrods and pistons.

Ideally, yes. We would highly recommend an MED four-bolt steel main cap set, AFS studs and line-boring of the block when upgrading to a steel crankshaft. On a road car, an MED centre main strap kit may suffice, but it's not the ideal arrangement when using a such a high-end crankshaft.

Yes we keep both a standard 81.33mm stroke or 86mm stroke version. We only supply the 86mm long-stroke crankshaft when creating a 1460cc engine (essentially a long-stroke 1380), as this will require super short height pistons that are only available in the 73.5mm size.

The bore size may depend on your race regulations, the block you have to work with, or personal preference. We can supply a range of different bore sizes and crown designs to create your desired compression ratio and capacity. When opting for 1460cc, we supply an 86mm stroke crankshaft and super short 1.115" compression height pistons. For all other combinations we supply 1.248" height pistons.

Most of these crankshaft kits end up in competition cars, but we have also supplied many to builders of potent fast road cars. They make a particularly strong and smooth-running fast road engine where the budget allows.

We have found over the years on powerful A-Series engines that the C-clip groove can be a potential fracture point, so on the Multi-web kit this is omitted from the design. Before final assembly of the engine, mount and torque up your flywheel on the crankshaft taper, with only the supplied bronze bush fitted in between. Ensure the bush is pushed up against the inside edge of the flywheel, and now measure the distance between the rear of this bush and the thrust face of the crankshaft. From this measurement, subtract the thickness of your primary gear and thrust washer and machine the difference from the bronze bush to achieve the desired 0.010" end float. Contact us for further help if you're unsure.

Only if you already have a set of MED Multiweb-specific conrods, as these run a unique big end journal design to create a non-offset assembly. Regular steel or Cooper S conrods will not fit the crankshaft. Likewise with the pistons, you will need to ensure these are the correct compression height and gudgeon pin diameter to suit - 1.248" and 18mm for 1293-1380 kits. The 1460 kit runs a special 1.115" compression height piston set.

Yes, please contact us via email or phone and we'll be happy to help further. Simply let us know what compression ratio you are aiming for, or if you're not certain, the general engine spec and usage. We can put together many different combinations to best suit your engine build plans.

Our crankshafts and conrods are manufactured just 20 minutes from MED at Arrow Precision Engineering - the very best in the business! We've worked with Arrow for over 20 years to create the best possible product.